From 410f5bcb8e89981824da0034b64fb6cfbf2f6974 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Tue, 13 Jun 2017 23:05:26 +0200
Subject: [PATCH 01/59] [docs] Update API documentation (#2973)

---
 docs/API.md | 310 +++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 261 insertions(+), 49 deletions(-)

diff --git a/docs/API.md b/docs/API.md
index 749656f421..d357443e10 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -23,6 +23,9 @@
   - [Class: Namespace](#namespace)
     - [namespace.name](#namespacename)
     - [namespace.connected](#namespaceconnected)
+    - [namespace.adapter](#namespaceadapter)
+    - [namespace.to(room)](#namespacetoroom)
+    - [namespace.in(room)](#namespaceinroom)
     - [namespace.emit(eventName[, ...args])](#namespaceemiteventname-args)
     - [namespace.clients(callback)](#namespaceclientscallback)
     - [namespace.use(fn)](#namespaceusefn)
@@ -36,6 +39,7 @@
     - [socket.client](#socketclient)
     - [socket.conn](#socketconn)
     - [socket.request](#socketrequest)
+    - [socket.handshake](#sockethandshake)
     - [socket.use(fn)](#socketusefn)
     - [socket.send([...args][, ack])](#socketsendargs-ack)
     - [socket.emit(eventName[, ...args][, ack])](#socketemiteventname-args-ack)
@@ -73,16 +77,15 @@ Exposed by `require('socket.io')`.
     - `serveClient` _(Boolean)_: whether to serve the client files (`true`)
     - `adapter` _(Adapter)_: the adapter to use. Defaults to an instance of the `Adapter` that ships with socket.io which is memory based. See [socket.io-adapter](https://github.com/socketio/socket.io-adapter)
     - `origins` _(String)_: the allowed origins (`*`)
-    - `allowRequest` _(Function)_: A function that receives a given handshake or upgrade request as its first parameter, and can decide whether to continue or not. The second argument is a function that needs to be called with the decided information: `fn(err, success)`, where `success` is a boolean value where false means that the request is rejected, and err is an error code.
     - `parser` _(Parser)_: the parser to use. Defaults to an instance of the `Parser` that ships with socket.io. See [socket.io-parser](https://github.com/socketio/socket.io-parser).
 
 Works with and without `new`:
 
 ```js
-var io = require('socket.io')();
+const io = require('socket.io')();
 // or
-var Server = require('socket.io');
-var io = new Server();
+const Server = require('socket.io');
+const io = new Server();
 ```
 
 The same options passed to socket.io are always passed to the `engine.io` `Server` that gets created. See engine.io [options](https://github.com/socketio/engine.io#methods-1) as reference.
@@ -98,6 +101,21 @@ Those two parameters will impact the delay before a client knows the server is n
 
 **Note:** The order is important. By default, a long-polling connection is established first, and then upgraded to WebSocket if possible. Using `['websocket']` means there will be no fallback if a WebSocket connection cannot be opened.
 
+```js
+const server = require('http').createServer();
+
+const io = require('socket.io')(server, {
+  path: '/test',
+  serveClient: false,
+  // below are engine.IO options
+  pingInterval: 10000,
+  pingTimeout: 5000,
+  cookie: false
+});
+
+server.listen(3000);
+```
+
 #### new Server(port[, options])
 
   - `port` _(Number)_ a port to listen to (a new `http.Server` will be created)
@@ -105,12 +123,50 @@ Those two parameters will impact the delay before a client knows the server is n
 
 See [above](#new-serverhttpserver-options) for available options.
 
+```js
+const server = require('http').createServer();
+
+const io = require('socket.io')(3000, {
+  path: '/test',
+  serveClient: false,
+  // below are engine.IO options
+  pingInterval: 10000,
+  pingTimeout: 5000,
+  cookie: false
+});
+```
+
 #### new Server(options)
 
   - `options` _(Object)_
 
 See [above](#new-serverhttpserver-options) for available options.
 
+```js
+const io = require('socket.io')({
+  path: '/test',
+  serveClient: false,
+});
+
+// either
+const server = require('http').createServer();
+
+io.attach(server, {
+  pingInterval: 10000,
+  pingTimeout: 5000,
+  cookie: false
+});
+
+server.listen(3000);
+
+// or
+io.attach(3000, {
+  pingInterval: 10000,
+  pingTimeout: 5000,
+  cookie: false
+});
+```
+
 #### server.sockets
 
   * _(Namespace)_
@@ -126,10 +182,10 @@ If `value` is `true` the attached server (see `Server#attach`) will serve the cl
 
 ```js
 // pass a server and the `serveClient` option
-var io = require('socket.io')(http, { serveClient: false });
+const io = require('socket.io')(http, { serveClient: false });
 
 // or pass no server and then you can call the method
-var io = require('socket.io')();
+const io = require('socket.io')();
 io.serveClient(false);
 io.attach(http);
 ```
@@ -141,6 +197,16 @@ io.attach(http);
 
 Sets the path `value` under which `engine.io` and the static files will be served. Defaults to `/socket.io`. If no arguments are supplied this method returns the current value.
 
+```js
+const io = require('socket.io')();
+io.path('/myownpath');
+
+// client-side
+const socket = io({
+  path: '/myownpath'
+});
+```
+
 #### server.adapter([value])
 
   - `value` _(Adapter)_
@@ -148,6 +214,12 @@ Sets the path `value` under which `engine.io` and the static files will be serve
 
 Sets the adapter `value`. Defaults to an instance of the `Adapter` that ships with socket.io which is memory based. See [socket.io-adapter](https://github.com/socketio/socket.io-adapter). If no arguments are supplied this method returns the current value.
 
+```js
+const io = require('socket.io')(3000);
+const redis = require('socket.io-redis');
+io.adapter(redis({ host: 'localhost', port: 6379 }));
+```
+
 #### server.origins([value])
 
   - `value` _(String)_
@@ -155,6 +227,10 @@ Sets the adapter `value`. Defaults to an instance of the `Adapter` that ships wi
 
 Sets the allowed origins `value`. Defaults to any origins being allowed. If no arguments are supplied this method returns the current value.
 
+```js
+io.origins(['foo.example.com:443']);
+```
+
 #### server.origins(fn)
 
   - `fn` _(Function)_
@@ -167,6 +243,15 @@ __Potential drawbacks__:
 * As this function will be executed for every request, it is advised to make this function work as fast as possible
 * If `socket.io` is used together with `Express`, the CORS headers will be affected only for `socket.io` requests. For Express can use [cors](https://github.com/expressjs/cors).
 
+```js
+io.origins((origin, callback) => {
+  if (origin !== 'https://foo.example.com') {
+    return callback('origin not allowed', false);
+  }
+  callback(null, true);
+});
+```
+
 #### server.attach(httpServer[, options])
 
   - `httpServer` _(http.Server)_ the server to attach to
@@ -174,7 +259,7 @@ __Potential drawbacks__:
 
 Attaches the `Server` to an engine.io instance on `httpServer` with the supplied `options` (optionally).
 
-### server.attach(port[, options])
+#### server.attach(port[, options])
 
   - `port` _(Number)_ the port to listen on
   - `options` _(Object)_
@@ -210,6 +295,10 @@ Advanced use only. Creates a new `socket.io` client from the incoming engine.io
 
 Initializes and retrieves the given `Namespace` by its pathname identifier `nsp`. If the namespace was already initialized it returns it immediately.
 
+```js
+const adminNamespace = io.of('/admin');
+```
+
 #### server.close([callback])
 
   - `callback` _(Function)_
@@ -217,11 +306,11 @@ Initializes and retrieves the given `Namespace` by its pathname identifier `nsp`
 Closes the socket.io server. The `callback` argument is optional and will be called when all connections are closed.
 
 ```js
-var Server = require('socket.io');
-var PORT   = 3030;
-var server = require('http').Server();
+const Server = require('socket.io');
+const PORT   = 3030;
+const server = require('http').Server();
 
-var io = Server(PORT);
+const io = Server(PORT);
 
 io.close(); // Close current server
 
@@ -237,7 +326,7 @@ Overwrites the default method to generate your custom socket id.
 The function is called with a node request object (`http.IncomingMessage`) as first parameter.
 
 ```js
-io.engine.generateId = function (req) {
+io.engine.generateId = (req) => {
   return "custom:id:" + custom_id++; // custom id must be unique
 }
 ```
@@ -247,7 +336,7 @@ io.engine.generateId = function (req) {
 Represents a pool of sockets connected under a given scope identified
 by a pathname (eg: `/chat`).
 
-By default the client always connects to `/`.
+A client always connects to `/` (the main namespace), then potentially connect to other namespaces (while using the same underlying connection).
 
 #### namespace.name
 
@@ -261,6 +350,34 @@ The namespace identifier property.
 
 The hash of `Socket` objects that are connected to this namespace, indexed by `id`.
 
+#### namespace.adapter
+
+  * _(Adapter)_
+
+The `Adapter` used for the namespace. Useful when using the `Adapter` based on [Redis](https://github.com/socketio/socket.io-redis), as it exposes methods to manage sockets and rooms accross your cluster.
+
+**Note:** the adapter of the main namespace can be accessed with `io.of('/').adapter`.
+
+#### namespace.to(room)
+
+  - `room` _(String)_
+  - **Returns** `Namespace` for chaining
+
+Sets a modifier for a subsequent event emission that the event will only be _broadcasted_ to clients that have joined the given `room`.
+
+To emit to multiple rooms, you can call `to` several times.
+
+```js
+const io = require('socket.io')();
+const adminNamespace = io.of('/admin');
+
+adminNamespace.to('level1').emit('an event', { some: 'data' });
+```
+
+#### namespace.in(room)
+
+Synonym of [namespace.to(room)](#namespacetoroom).
+
 #### namespace.emit(eventName[, ...args])
 
   - `eventName` _(String)_
@@ -269,14 +386,15 @@ The hash of `Socket` objects that are connected to this namespace, indexed by `i
 Emits an event to all connected clients. The following two are equivalent:
 
 ```js
-var io = require('socket.io')();
-
+const io = require('socket.io')();
 io.emit('an event sent to all connected clients'); // main namespace
 
-var chat = io.of('/chat');
+const chat = io.of('/chat');
 chat.emit('an event sent to all connected clients in chat namespace');
 ```
 
+**Note:** acknowledgements are not supported when emitting from namespace.
+
 #### namespace.clients(callback)
 
   - `callback` _(Function)_
@@ -284,8 +402,8 @@ chat.emit('an event sent to all connected clients in chat namespace');
 Gets a list of client IDs connected to this namespace (across all nodes if applicable).
 
 ```js
-var io = require('socket.io')();
-io.of('/chat').clients(function(error, clients){
+const io = require('socket.io')();
+io.of('/chat').clients((error, clients) => {
   if (error) throw error;
   console.log(clients); // => [PZDoMHjiu8PYfRiKAAAF, Anw2LatarvGVVXEIAAAD]
 });
@@ -294,8 +412,7 @@ io.of('/chat').clients(function(error, clients){
 An example to get all clients in namespace's room:
 
 ```js
-var io = require('socket.io')();
-io.of('/chat').in('general').clients(function(error, clients){
+io.of('/chat').in('general').clients((error, clients) => {
   if (error) throw error;
   console.log(clients); // => [Anw2LatarvGVVXEIAAAD]
 });
@@ -304,8 +421,7 @@ io.of('/chat').in('general').clients(function(error, clients){
 As with broadcasting, the default is all clients from the default namespace ('/'):
 
 ```js
-var io = require('socket.io')();
-io.clients(function(error, clients){
+io.clients((error, clients) => {
   if (error) throw error;
   console.log(clients); // => [6em3d4TJP8Et9EMNAAAA, G5p55dHhGgUnLUctAAAB]
 });
@@ -320,8 +436,7 @@ Registers a middleware, which is a function that gets executed for every incomin
 Errors passed to middleware callbacks are sent as special `error` packets to clients.
 
 ```js
-var io = require('socket.io')();
-io.use(function(socket, next){
+io.use((socket, next) => {
   if (socket.request.headers.cookie) return next();
   next(new Error('Authentication error'));
 });
@@ -333,6 +448,16 @@ io.use(function(socket, next){
 
 Fired upon a connection from client.
 
+```js
+io.on('connect', (socket) => {
+  // ...
+});
+
+io.of('/admin').on('connect', (socket) => {
+  // ...
+});
+```
+
 #### Event: 'connection'
 
 Synonym of [Event: 'connect'](#event-connect).
@@ -375,6 +500,15 @@ A unique identifier for the session, that comes from the underlying `Client`.
 
 A hash of strings identifying the rooms this client is in, indexed by room name.
 
+```js
+io.on('connection', (socket) => {
+  socket.join('room 237', () => {
+    let rooms = Objects.keys(socket.rooms);
+    console.log(rooms); // [ <socket.id>, 'room 237' ]
+  });
+});
+```
+
 #### socket.client
 
   * _(Client)_
@@ -393,6 +527,39 @@ A reference to the underlying `Client` transport connection (engine.io `Socket`
 
 A getter proxy that returns the reference to the `request` that originated the underlying engine.io `Client`. Useful for accessing request headers such as `Cookie` or `User-Agent`.
 
+#### socket.handshake
+
+  * _(Object)_
+
+The handshake details:
+
+```js
+{
+  headers: /* the headers sent as part of the handshake */,
+  time: /* the date of creation (as string) */,
+  address: /* the ip of the client */,
+  xdomain: /* whether the connection is cross-domain */,
+  secure: /* whether the connection is secure */,
+  issued: /* the date of creation (as unix timestamp) */,
+  url: /* the request URL string */,
+  query: /* the query object */
+}
+```
+
+Usage:
+
+```js
+io.use((socket, next) => {
+  let handshake = socket.handshake;
+  // ...
+});
+
+io.on('connection', (socket) => {
+  let handshake = socket.handshake;
+  // ...
+});
+```
+
 #### socket.use(fn)
 
   - `fn` _(Function)_
@@ -402,9 +569,8 @@ Registers a middleware, which is a function that gets executed for every incomin
 Errors passed to middleware callbacks are sent as special `error` packets to clients.
 
 ```js
-var io = require('socket.io')();
-io.on('connection', function(socket){
-  socket.use(function(packet, next){
+io.on('connection', (socket) => {
+  socket.use((packet, next) => {
     if (packet.doge === true) return next();
     next(new Error('Not a doge error'));
   });
@@ -437,16 +603,15 @@ socket.emit('with-binary', 1, '2', { 3: '4', 5: new Buffer(6) });
 The `ack` argument is optional and will be called with the client's answer.
 
 ```js
-var io = require('socket.io')();
-io.on('connection', function(client){
-  client.emit('an event', { some: 'data' });
+io.on('connection', (socket) => {
+  socket.emit('an event', { some: 'data' });
 
-  client.emit('ferret', 'tobi', function (data) {
+  socket.emit('ferret', 'tobi', (data) => {
     console.log(data); // data will be 'woot'
   });
 
   // the client code
-  // client.on('ferret', function (name, fn) {
+  // client.on('ferret', (name, fn) => {
   //   fn('woot');
   // });
 
@@ -463,9 +628,17 @@ io.on('connection', function(client){
 Register a new handler for the given event.
 
 ```js
-socket.on('news', function (data) {
+socket.on('news', (data) => {
   console.log(data);
 });
+// with several arguments
+socket.on('news', (arg1, arg2, arg3) => {
+  // ...
+});
+// or with acknowledgement
+socket.on('news', (data, callback) => {
+  callback(0);
+});
 ```
 
 #### socket.once(eventName, listener)
@@ -484,9 +657,10 @@ Inherited from `EventEmitter` (along with other methods not mentioned here). See
 Adds the client to the `room`, and fires optionally a callback with `err` signature (if any).
 
 ```js
-io.on('connection', function(socket){
-  socket.join('room 237', function(){
-    console.log(socket.rooms); // [ <socket.id>, 'room 237' ]
+io.on('connection', (socket) => {
+  socket.join('room 237', () => {
+    let rooms = Objects.keys(socket.rooms);
+    console.log(rooms); // [ <socket.id>, 'room 237' ]
     io.to('room 237', 'a new user has joined the room'); // broadcast to everyone in the room
   });
 });
@@ -494,13 +668,13 @@ io.on('connection', function(socket){
 
 The mechanics of joining rooms are handled by the `Adapter` that has been configured (see `Server#adapter` above), defaulting to [socket.io-adapter](https://github.com/socketio/socket.io-adapter).
 
-For your convenience, each socket automatically joins a room identified by this id (see `Socket#id`). This makes it easy to broadcast messages to other sockets:
+For your convenience, each socket automatically joins a room identified by its id (see `Socket#id`). This makes it easy to broadcast messages to other sockets:
 
 ```js
-io.on('connection', function(client){
-  client.on('say to someone', function(id, msg){
+io.on('connection', (socket) => {
+  socket.on('say to someone', (id, msg) => {
     // send a private message to the socket with the given id
-    client.broadcast.to(id).emit('my message', msg);
+    socket.to(id).emit('my message', msg);
   });
 });
 ```
@@ -528,20 +702,23 @@ Removes the client from `room`, and fires optionally a callback with `err` signa
   - `room` _(String)_
   - **Returns** `Socket` for chaining
 
-Sets a modifier for a subsequent event emission that the event will only be _broadcasted_ to clients that have joined the given `room`.
+Sets a modifier for a subsequent event emission that the event will only be _broadcasted_ to clients that have joined the given `room` (the socket itself being excluded).
 
 To emit to multiple rooms, you can call `to` several times.
 
 ```js
-var io = require('socket.io')();
-io.on('connection', function(client){
+io.on('connection', (socket) => {
   // to one room
-  client.to('others').emit('an event', { some: 'data' });
+  socket.to('others').emit('an event', { some: 'data' });
   // to multiple rooms
-  client.to('room1').to('room2').emit('hello');
+  socket.to('room1').to('room2').emit('hello');
+  // a private message to another socket
+  socket.to(/* another socket id */).emit('hey');
 });
 ```
 
+**Note:** acknowledgements are not supported when broadcasting.
+
 #### socket.in(room)
 
 Synonym of [socket.to(room)](#sockettoroom).
@@ -553,6 +730,12 @@ Synonym of [socket.to(room)](#sockettoroom).
 
 Sets a modifier for a subsequent event emission that the event data will only be _compressed_ if the value is `true`. Defaults to `true` when you don't call the method.
 
+```js
+io.on('connection', (socket) => {
+  socket.compress(false).emit('uncompressed', "that's rough");
+});
+```
+
 #### socket.disconnect(close)
 
   - `close` _(Boolean)_ whether to close the underlying connection
@@ -560,13 +743,18 @@ Sets a modifier for a subsequent event emission that the event data will only be
 
 Disconnects this client. If value of close is `true`, closes the underlying connection. Otherwise, it just disconnects the namespace.
 
+```js
+io.on('connection', (socket) => {
+  setTimeout(() => socket.disconnect(true), 5000);
+});
+```
+
 #### Flag: 'broadcast'
 
 Sets a modifier for a subsequent event emission that the event data will only be _broadcast_ to every sockets but the sender.
 
 ```js
-var io = require('socket.io')();
-io.on('connection', function(socket){
+io.on('connection', (socket) => {
   socket.broadcast.emit('an event', { some: 'data' }); // everyone gets it but the sender
 });
 ```
@@ -576,8 +764,7 @@ io.on('connection', function(socket){
 Sets a modifier for a subsequent event emission that the event data may be lost if the client is not ready to receive messages (because of network slowness or other issues, or because they’re connected through long polling and is in the middle of a request-response cycle).
 
 ```js
-var io = require('socket.io')();
-io.on('connection', function(socket){
+io.on('connection', (socket) => {
   socket.volatile.emit('an event', { some: 'data' }); // the client may or may not receive it
 });
 ```
@@ -588,18 +775,43 @@ io.on('connection', function(socket){
 
 Fired upon disconnection.
 
+```js
+io.on('connection', (socket) => {
+  socket.on('disconnect', (reason) => {
+    // ...
+  });
+});
+```
+
 #### Event: 'error'
 
   - `error` _(Object)_ error object
 
 Fired when an error occurs.
 
+```js
+io.on('connection', (socket) => {
+  socket.on('error', (error) => {
+    // ...
+  });
+});
+```
+
 #### Event: 'disconnecting'
 
   - `reason` _(String)_ the reason of the disconnection (either client or server-side)
 
 Fired when the client is going to be disconnected (but hasn't left its `rooms` yet).
 
+```js
+io.on('connection', (socket) => {
+  socket.on('disconnecting', (reason) => {
+    let rooms = Object.keys(socket.rooms);
+    // ...
+  });
+});
+```
+
 These are reserved events (along with `connect`, `newListener` and `removeListener`) which cannot be used as event names.
 
 ### Client

From bf7afb14cb31cb4c17cfa8e1eb1fd4a8dcfc1ebf Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Thu, 15 Jun 2017 23:40:43 +0200
Subject: [PATCH 02/59] =?UTF-8?q?[docs]=C2=A0Update=20Webpack=20server=20e?=
 =?UTF-8?q?xample=20(#2976)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 examples/webpack-build-server/lib/index.js     |  3 ++-
 examples/webpack-build-server/package.json     | 12 ++----------
 .../support/webpack.config.js                  | 18 +-----------------
 3 files changed, 5 insertions(+), 28 deletions(-)

diff --git a/examples/webpack-build-server/lib/index.js b/examples/webpack-build-server/lib/index.js
index afcdbdb8a4..b05f4fbbbb 100644
--- a/examples/webpack-build-server/lib/index.js
+++ b/examples/webpack-build-server/lib/index.js
@@ -1,7 +1,8 @@
 
 const server = require('http').createServer();
 const io = require('socket.io')(server, {
-  // serveClient: false // do not serve the client file, in that case the brfs loader is not needed
+  serveClient: false,
+  wsEngine: 'ws' // uws is not supported since it is a native module
 });
 const port = process.env.PORT || 3000;
 
diff --git a/examples/webpack-build-server/package.json b/examples/webpack-build-server/package.json
index 28ef8ba392..abd095e4cf 100644
--- a/examples/webpack-build-server/package.json
+++ b/examples/webpack-build-server/package.json
@@ -8,16 +8,8 @@
   },
   "author": "Damien Arrachequesne",
   "license": "MIT",
-  "dependencies": {
-    "brfs": "^1.4.3",
-    "bufferutil": "^1.3.0",
-    "socket.io": "^1.7.2",
-    "transform-loader": "^0.2.3",
-    "utf-8-validate": "^2.0.0"
-  },
   "devDependencies": {
-    "json-loader": "^0.5.4",
-    "null-loader": "^0.1.1",
-    "webpack": "^1.14.0"
+    "socket.io": "^2.0.3",
+    "webpack": "^2.6.1"
   }
 }
diff --git a/examples/webpack-build-server/support/webpack.config.js b/examples/webpack-build-server/support/webpack.config.js
index a9893a73d2..4e09c86624 100644
--- a/examples/webpack-build-server/support/webpack.config.js
+++ b/examples/webpack-build-server/support/webpack.config.js
@@ -3,23 +3,7 @@ module.exports = {
   entry: './lib/index.js',
   target: 'node',
   output: {
-    path: './dist',
+    path: require('path').join(__dirname, '../dist'),
     filename: 'server.js'
-  },
-  module: {
-    loaders: [
-      {
-        test: /(\.md|\.map)$/,
-        loader: 'null'
-      },
-      {
-        test: /\.json$/,
-        loader: 'json'
-      },
-      {
-        test: /\.js$/,
-        loader: "transform-loader?brfs"
-      }
-    ]
   }
 };

From 7199d1b6ef812a13a4df09b5155b52f52517ea2d Mon Sep 17 00:00:00 2001
From: Nicolas Coden <nicolas@ncoden.fr>
Date: Mon, 19 Jun 2017 12:16:26 +0200
Subject: [PATCH 03/59] [docs] Fix misnamed 'Object.keys' in API docs (#2979)

---
 docs/API.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/API.md b/docs/API.md
index d357443e10..a3ebafa520 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -503,7 +503,7 @@ A hash of strings identifying the rooms this client is in, indexed by room name.
 ```js
 io.on('connection', (socket) => {
   socket.join('room 237', () => {
-    let rooms = Objects.keys(socket.rooms);
+    let rooms = Object.keys(socket.rooms);
     console.log(rooms); // [ <socket.id>, 'room 237' ]
   });
 });
@@ -659,7 +659,7 @@ Adds the client to the `room`, and fires optionally a callback with `err` signat
 ```js
 io.on('connection', (socket) => {
   socket.join('room 237', () => {
-    let rooms = Objects.keys(socket.rooms);
+    let rooms = Object.keys(socket.rooms);
     console.log(rooms); // [ <socket.id>, 'room 237' ]
     io.to('room 237', 'a new user has joined the room'); // broadcast to everyone in the room
   });

From 9d170a75d0626cff60f6be518351d825b894c44d Mon Sep 17 00:00:00 2001
From: Gabriel Hautclocq <gabriel@gabsoftware.com>
Date: Sat, 1 Jul 2017 07:57:34 +0200
Subject: [PATCH 04/59] [docs] Add io.emit in the cheat sheet (#2992)

---
 docs/emit.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/emit.md b/docs/emit.md
index c022618423..96ff26f7e4 100644
--- a/docs/emit.md
+++ b/docs/emit.md
@@ -42,6 +42,9 @@ function onConnect(socket){
 
   // sending to all clients on this node (when using multiple nodes)
   io.local.emit('hi', 'my lovely babies');
+  
+  // sending to all connected clients
+  io.emit('an event sent to all connected clients');
 
 };
 

From 1f0e64a6da90213d8b5633b72acffae9f8a9a830 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Sat, 26 Aug 2017 07:35:57 +0200
Subject: [PATCH 05/59] [fix] Do not throw when receiving an unhandled error
 packet (#3038)

---
 lib/socket.js     |  2 +-
 test/socket.io.js | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/lib/socket.js b/lib/socket.js
index a907bf3381..91ddbbdf03 100644
--- a/lib/socket.js
+++ b/lib/socket.js
@@ -340,7 +340,7 @@ Socket.prototype.onpacket = function(packet){
       break;
 
     case parser.ERROR:
-      this.emit('error', packet.data);
+      this.onerror(new Error(packet.data));
   }
 };
 
diff --git a/test/socket.io.js b/test/socket.io.js
index bd2e65d2ad..44d8d1a8f7 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -1699,6 +1699,23 @@ describe('socket.io', function(){
       });
     });
 
+    it('should not crash when receiving an error packet without handler', function(done){
+      var srv = http();
+      var sio = io(srv);
+      srv.listen(function(){
+        var socket = client(srv, { reconnection: false });
+        sio.on('connection', function(s){
+          s.conn.on('upgrade', function(){
+            console.log('\033[96mNote: warning expected and normal in test.\033[39m');
+            socket.io.engine.write('44["handle me please"]');
+            setTimeout(function(){
+              done();
+            }, 100);
+          });
+        });
+      });
+    });
+
     it('should not crash with raw binary', function(done){
       var srv = http();
       var sio = io(srv);

From dd69abbeeeeeb50c5f88b0cb79460e1add690820 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Sat, 26 Aug 2017 07:36:26 +0200
Subject: [PATCH 06/59] [fix] Reset rooms object before broadcasting from
 namespace (#3039)

---
 lib/namespace.js | 33 +++++++++++++++++++--------------
 lib/socket.js    |  5 ++---
 package.json     |  1 -
 3 files changed, 21 insertions(+), 18 deletions(-)

diff --git a/lib/namespace.js b/lib/namespace.js
index 3c6b65ca4d..0b0657ba8c 100644
--- a/lib/namespace.js
+++ b/lib/namespace.js
@@ -210,23 +210,28 @@ Namespace.prototype.remove = function(socket){
 Namespace.prototype.emit = function(ev){
   if (~exports.events.indexOf(ev)) {
     emit.apply(this, arguments);
-  } else {
-    // set up packet object
-    var args = Array.prototype.slice.call(arguments);
-    var packet = { type: parser.EVENT, data: args };
+    return this;
+  }
+  // set up packet object
+  var args = Array.prototype.slice.call(arguments);
+  var packet = { type: parser.EVENT, data: args };
 
-    if ('function' == typeof args[args.length - 1]) {
-      throw new Error('Callbacks are not supported when broadcasting');
-    }
+  if ('function' == typeof args[args.length - 1]) {
+    throw new Error('Callbacks are not supported when broadcasting');
+  }
 
-    this.adapter.broadcast(packet, {
-      rooms: this.rooms,
-      flags: this.flags
-    });
+  var rooms = this.rooms.slice(0);
+  var flags = Object.assign({}, this.flags);
+
+  // reset flags
+  this.rooms = [];
+  this.flags = {};
+
+  this.adapter.broadcast(packet, {
+    rooms: rooms,
+    flags: flags
+  });
 
-    this.rooms = [];
-    this.flags = {};
-  }
   return this;
 };
 
diff --git a/lib/socket.js b/lib/socket.js
index 91ddbbdf03..6c6bcde3e7 100644
--- a/lib/socket.js
+++ b/lib/socket.js
@@ -7,7 +7,6 @@ var Emitter = require('events').EventEmitter;
 var parser = require('socket.io-parser');
 var url = require('url');
 var debug = require('debug')('socket.io:socket');
-var assign = require('object-assign');
 
 /**
  * Module exports.
@@ -115,7 +114,7 @@ Socket.prototype.buildHandshake = function(query){
   function buildQuery(){
     var requestQuery = url.parse(self.request.url, true).query;
     //if socket-specific query exist, replace query strings in requestQuery
-    return assign({}, query, requestQuery);
+    return Object.assign({}, query, requestQuery);
   }
   return {
     headers: this.request.headers,
@@ -160,7 +159,7 @@ Socket.prototype.emit = function(ev){
   }
 
   var rooms = this._rooms.slice(0);
-  var flags = assign({}, this.flags);
+  var flags = Object.assign({}, this.flags);
 
   // reset flags
   this._rooms = [];
diff --git a/package.json b/package.json
index 50dc91fe9c..0973bbf019 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,6 @@
   "dependencies": {
     "debug": "~2.6.6",
     "engine.io": "~3.1.0",
-    "object-assign": "~4.1.1",
     "socket.io-adapter": "~1.1.0",
     "socket.io-client": "~2.0.2",
     "socket.io-parser": "~3.1.1"

From 3684d590f51fae6dd9bb4501f7ea75afe20ffcda Mon Sep 17 00:00:00 2001
From: Stanley288 <stanley.zhao@surrey.ca>
Date: Fri, 25 Aug 2017 22:44:25 -0700
Subject: [PATCH 07/59] [docs] Use path.join instead of concatenating paths
 (#3014)

---
 examples/chat/index.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/examples/chat/index.js b/examples/chat/index.js
index c9efcec25e..a1355285c9 100644
--- a/examples/chat/index.js
+++ b/examples/chat/index.js
@@ -1,6 +1,7 @@
 // Setup basic express server
 var express = require('express');
 var app = express();
+var path = require('path');
 var server = require('http').createServer(app);
 var io = require('../..')(server);
 var port = process.env.PORT || 3000;
@@ -10,7 +11,7 @@ server.listen(port, function () {
 });
 
 // Routing
-app.use(express.static(__dirname + '/public'));
+app.use(express.static(path.join(__dirname, 'public')));
 
 // Chatroom
 

From 3386e155a8027f3cec85b82e803cbc87a119e56b Mon Sep 17 00:00:00 2001
From: Haku <gmkohaku@gmail.com>
Date: Sun, 27 Aug 2017 14:40:26 +0800
Subject: [PATCH 08/59] [docs] Actually prevent input from having injected
 markup in chat example (#2987)

---
 examples/chat/public/main.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/chat/public/main.js b/examples/chat/public/main.js
index dc1721be99..83d142825a 100644
--- a/examples/chat/public/main.js
+++ b/examples/chat/public/main.js
@@ -146,7 +146,7 @@ $(function() {
 
   // Prevents input from having injected markup
   function cleanInput (input) {
-    return $('<div/>').text(input).text();
+    return $('<div/>').text(input).html();
   }
 
   // Updates the typing event

From e26b71c78e48d566fc8bf3726bcec0ba872b015a Mon Sep 17 00:00:00 2001
From: Vyacheslav Aristov <vv.aristov@gmail.com>
Date: Sat, 7 Oct 2017 15:36:02 +0300
Subject: [PATCH 09/59] [docs] Fix typo in API docs (#3066)

---
 docs/API.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/API.md b/docs/API.md
index a3ebafa520..161a4480fb 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -661,7 +661,7 @@ io.on('connection', (socket) => {
   socket.join('room 237', () => {
     let rooms = Object.keys(socket.rooms);
     console.log(rooms); // [ <socket.id>, 'room 237' ]
-    io.to('room 237', 'a new user has joined the room'); // broadcast to everyone in the room
+    io.to('room 237').emit('a new user has joined the room'); // broadcast to everyone in the room
   });
 });
 ```

From 3f611654f25743c2a5efd8e19aec9f40bd4a46ee Mon Sep 17 00:00:00 2001
From: Carson McKinstry <carson.mckinstry@gmail.com>
Date: Sat, 7 Oct 2017 08:08:14 -0500
Subject: [PATCH 10/59] [docs] Fix a grammar mistake in the API docs (#3076)

---
 docs/API.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/API.md b/docs/API.md
index 161a4480fb..4bfadddd43 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -241,7 +241,7 @@ Provides a function taking two arguments `origin:String` and `callback(error, su
 __Potential drawbacks__:
 * in some situations, when it is not possible to determine `origin` it may have value of `*`
 * As this function will be executed for every request, it is advised to make this function work as fast as possible
-* If `socket.io` is used together with `Express`, the CORS headers will be affected only for `socket.io` requests. For Express can use [cors](https://github.com/expressjs/cors).
+* If `socket.io` is used together with `Express`, the CORS headers will be affected only for `socket.io` requests. For Express you can use [cors](https://github.com/expressjs/cors).
 
 ```js
 io.origins((origin, callback) => {

From f33347908066da4f89febe886929b4c5f5e838eb Mon Sep 17 00:00:00 2001
From: Thiago Santos <thia.mdossantos@gmail.com>
Date: Mon, 16 Oct 2017 03:46:42 -0200
Subject: [PATCH 11/59] =?UTF-8?q?[test]=C2=A0Use=20npm=20scripts=20instead?=
 =?UTF-8?q?=20of=20gulp=20(#3078)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .gitignore        |  1 +
 Makefile          |  8 ------
 gulpfile.js       | 69 -----------------------------------------------
 package.json      | 13 +++------
 test/socket.io.js | 31 ++++-----------------
 5 files changed, 9 insertions(+), 113 deletions(-)
 delete mode 100644 Makefile
 delete mode 100644 gulpfile.js

diff --git a/.gitignore b/.gitignore
index 32d7d3bbd4..7e78cb2147 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ node_modules
 coverage
 .idea
 dist
+.nyc_output
\ No newline at end of file
diff --git a/Makefile b/Makefile
deleted file mode 100644
index 6e494e024f..0000000000
--- a/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-
-test:
-	@./node_modules/.bin/gulp test
-
-test-cov:
-	@./node_modules/.bin/gulp test-cov
-
-.PHONY: test
diff --git a/gulpfile.js b/gulpfile.js
deleted file mode 100644
index 82603d026c..0000000000
--- a/gulpfile.js
+++ /dev/null
@@ -1,69 +0,0 @@
-const gulp = require('gulp');
-const mocha = require('gulp-mocha');
-const babel = require("gulp-babel");
-const istanbul = require('gulp-istanbul');
-const help = require('gulp-task-listing');
-const del = require('del');
-
-gulp.task('help', help);
-
-gulp.task('default', ['transpile']);
-
-const TRANSPILE_DEST_DIR = './dist';
-
-// By default, individual js files are transformed by babel and exported to /dist
-gulp.task('transpile', function () {
-  return gulp.src("lib/*.js")
-    .pipe(babel({ "presets": ["es2015"] }))
-    .pipe(gulp.dest(TRANSPILE_DEST_DIR));
-});
-
-gulp.task('clean', function () {
-  return del([TRANSPILE_DEST_DIR]);
-})
-
-gulp.task('test', ['transpile'], function(){
-  return gulp.src('test/socket.io.js', {read: false})
-    .pipe(mocha({
-      slow: 200,
-      reporter: 'spec',
-      bail: true,
-      timeout: 10000
-    }))
-    .once('error', function (err) {
-      console.error(err.stack);
-      process.exit(1);
-    })
-    .once('end', function () {
-      process.exit();
-    });
-});
-
-gulp.task('set-compat-node-env', function() {
-  process.env.TEST_VERSION = 'compat';
-});
-
-gulp.task('test-compat', ['set-compat-node-env', 'test']);
-
-gulp.task('istanbul-pre-test', function () {
-  return gulp.src(['lib/**/*.js'])
-    // Covering files
-    .pipe(istanbul())
-    // Force `require` to return covered files
-    .pipe(istanbul.hookRequire());
-});
-
-gulp.task('test-cov', ['istanbul-pre-test'], function(){
-  return gulp.src('test/socket.io.js', {read: false})
-    .pipe(mocha({
-      reporter: 'dot'
-    }))
-    .pipe(istanbul.writeReports())
-    .once('error', function (err){
-      console.error(err.stack);
-      process.exit(1);
-    })
-    .once('end', function (){
-      process.exit();
-    });
-});
diff --git a/package.json b/package.json
index 0973bbf019..d6a5d1658c 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "url": "git://github.com/socketio/socket.io"
   },
   "scripts": {
-    "test": "gulp test"
+    "test": "nyc mocha --reporter spec --slow 200 --bail --timeout 10000 test/socket.io.js"
   },
   "dependencies": {
     "debug": "~2.6.6",
@@ -31,16 +31,9 @@
     "socket.io-parser": "~3.1.1"
   },
   "devDependencies": {
-    "babel-preset-es2015": "^6.24.1",
-    "del": "^2.2.2",
     "expect.js": "0.3.1",
-    "gulp": "^3.9.1",
-    "gulp-babel": "^6.1.2",
-    "gulp-istanbul": "^1.1.1",
-    "gulp-mocha": "^4.3.1",
-    "gulp-task-listing": "1.0.1",
-    "istanbul": "^0.4.5",
-    "mocha": "^3.3.0",
+    "mocha": "^3.5.3",
+    "nyc": "^11.2.1",
     "superagent": "1.6.1",
     "supertest": "1.1.0"
   },
diff --git a/test/socket.io.js b/test/socket.io.js
index 44d8d1a8f7..f382d503d2 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -1,12 +1,5 @@
-var testVersion = process.env.TEST_VERSION;
 var http = require('http').Server;
-var io;
-if (testVersion === 'compat') {
-  console.log('testing compat version');
-  io = require('../dist');
-} else {
-  io = require('../lib');
-}
+var io = require('../lib');
 var fs = require('fs');
 var join = require('path').join;
 var exec = require('child_process').exec;
@@ -432,18 +425,9 @@ describe('socket.io', function(){
   });
 
   describe('namespaces', function(){
-    var Socket;
-    if (testVersion === 'compat') {
-      Socket = require('../dist/socket');
-    } else {
-      Socket = require('../lib/socket');
-    }
-    var Namespace;
-    if (testVersion === 'compat') {
-      Namespace = require('../dist/namespace');
-    } else {
-      Namespace = require('../lib/namespace');
-    }
+    var Socket = require('../lib/socket');
+    var Namespace = require('../lib/namespace');
+
     it('should be accessible through .sockets', function(){
       var sio = io();
       expect(sio.sockets).to.be.a(Namespace);
@@ -2123,12 +2107,7 @@ describe('socket.io', function(){
   });
 
   describe('middleware', function(done){
-    var Socket;
-    if (testVersion === 'compat') {
-      Socket = require('../dist/socket');
-    } else {
-      Socket = require('../lib/socket');
-    }
+    var Socket = require('../lib/socket');
 
     it('should call functions', function(done){
       var srv = http();

From 1c108a35e499579f978908bac3fb47122ed77ee4 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Sun, 22 Oct 2017 15:16:29 +0200
Subject: [PATCH 12/59] [chore] Release 2.0.4

---
 History.md   | 720 ---------------------------------------------------
 package.json |   4 +-
 2 files changed, 2 insertions(+), 722 deletions(-)
 delete mode 100644 History.md

diff --git a/History.md b/History.md
deleted file mode 100644
index e750230464..0000000000
--- a/History.md
+++ /dev/null
@@ -1,720 +0,0 @@
-
-2.0.3 / 2017-06-12
-===================
-
-  * [fix] Reset rooms object before broadcasting (#2970)
-  * [fix] Fix middleware initialization (#2969)
-  * [docs] Update slack badge (#2961)
-  * [docs] Update webpack example (#2960)
-
-2.0.2 / 2017-06-01
-===================
-
-  * [fix] Fix timing issues with middleware (#2948)
-
-2.0.1 / 2017-05-09
-===================
-
-  * [fix] Update path of client file (#2934)
-
-2.0.0 / 2017-05-09
-===================
-
-  * [feat] Move binary detection to the parser (#2923)
-  * [feat] Allow to join several rooms at once (#2879)
-  * [feat] Merge Engine.IO and Socket.IO handshake packets (#2833)
-  * [feat] Allow the use of custom parsers (#2829)
-
-  * [fix] Use path.resolve by default and require.resolve as a fallback (#2797)
-  * [fix] Properly close the connection on error (#2681)
-  * [fix] Prevent null from being accepted as argument (#2606)
-
-  * [perf] Use shared instance of the encoder (#2825)
-  * [perf] Reset properties instead of deleting them (#2826)
-  * [perf] micro-optimisations (#2793)
-
-  * [chore] Merge history of 1.7.x and 0.9.x branches (#2930)
-  * [chore] Added backers and sponsors on the README (#2933)
-  * [chore] Bump dependencies (#2926)
-  * [chore] Bump socket.io-adapter to version 1.0.0 (#2867)
-  * [chore] Bump engine.io to version 2.0.2 (#2864)
-  * [chore] Bump engine.io to version 2.0.0 (#2832)
-  * [chore] Update issue template with fiddle (#2811)
-  * [chore] Update copyright year LICENSE to 2017 (#2803)
-
-  * [docs] Add an example of custom parser (#2929)
-  * [docs] Replace non-breaking space with proper whitespace (#2913)
-  * [docs] Update emit cheatsheet (#2906)
-  * [docs] Explicitly document that Server extends EventEmitter (#2874)
-  * [docs] Add server.engine.generateId attribute (#2880)
-  * [docs] Fix wrong space character in README (#2900)
-  * [docs] Fix documentation for 'connect' event (#2898)
-  * [docs] Add webpack build example (#2828)
-  * [docs] Update the wording to match the code example (#2853)
-  * [docs] Small addition to the Express Readme Part (#2846)
-  * [docs] Add a 'Features' section in the README (#2824)
-  * [docs] Add httpd cluster example (#2819)
-  * [docs] Add haproxy cluster example (#2818)
-  * [docs] Add nginx cluster example (#2817)
-  * [docs] Implement whiteboard example (#2810)
-  * [docs] Fix documentation for `local` flag (#2816)
-  * [docs] Add emit cheatsheet (#2815)
-  * [docs] Add pingInterval/pingTimeout/transports options in the API documentation (#2814)
-  * [docs] Add an example for socket.join() method (#2813)
-  * [docs] Fix a typo on `clients` method in the API documentation (#2812)
-  * [docs] Fix wrong argument name in API.md (#2802)
-  * [docs] Add install script on Readme.md (#2780)
-  * [docs] API documentation (#2784)
-
-1.7.4 / 2017-05-07
-===================
-
-  * [chore] Bump engine.io to version 1.8.4
-
-0.9.18 / 2017-05-07
-===================
-
-  * Remove process.EventEmitter usage for Node 7.x
-
-1.7.3 / 2017-02-17
-===================
-
-  * [chore] Bump engine.io to version 1.8.3
-
-1.7.2 / 2016-12-11
-===================
-
-  * [chore] Bump engine.io to version 1.8.2 (#2782)
-  * [fix] Fixes socket.use error packet (#2772)
-
-1.7.1 / 2016-11-28
-===================
-
-1.7.0 / 2016-11-27
-===================
-
-  * [docs] Comment connected socket availability for adapters (#2081)
-  * [docs] Fixed grammar issues in the README.md (#2159)
-  * [feature] serve sourcemap for socket.io-client (#2482)
-  * [feature] Add a `local` flag (#2628)
-  * [chore] Bump engine.io to version 1.8.1 (#2765)
-  * [chore] Update client location and serve minified file (#2766)
-
-1.6.0 / 2016-11-20
-==================
-
-  * [fix] Make ETag header comply with standard. (#2603)
-  * [feature] Loading client script on demand. (#2567)
-  * [test] Fix leaking clientSocket (#2721)
-  * [feature] Add support for all event emitter methods (#2601)
-  * [chore] Update year to 2016 (#2456)
-  * [feature] Add support for socket middleware (#2306)
-  * [feature] add support for Server#close(callback) (#2748)
-  * [fix] Don't drop query variables on handshake (#2745)
-  * [example] Add disconnection/reconnection logs to the chat example (#2675)
-  * [perf] Minor code optimizations (#2219)
-  * [chore] Bump debug to version 2.3.3 (#2754)
-  * [chore] Bump engine.io to version 1.8.0 (#2755)
-  * [chore] Bump socket.io-adapter to version 0.5.0 (#2756)
-
-1.5.1 / 2016-10-24
-==================
-
-  * [fix] Avoid swallowing exceptions thrown by user event handlers (#2682)
-  * [test] Use client function to unify `client` in test script (#2731)
-  * [docs] Add link to LICENSE (#2221)
-  * [docs] Fix JSDoc of optional parameters (#2465)
-  * [docs] Fix typo (#2724)
-  * [docs] Link readme npm package badge to npm registry page (#2612)
-  * [docs] Minor fixes (#2526)
-  * [chore] Bump socket.io-parser to 2.3.0 (#2730)
-  * [chore] Add Github issue and PR templates (#2733)
-  * [chore] Bump engine.io to 1.7.2 (#2729)
-  * [chore] Bump socket.io-parser to 2.3.1 (#2734)
-
-1.5.0 / 2016-10-06
-==================
-
-  * [feature] stop append /# before id when no namespace (#2508)
-  * [feature] Add a 'disconnecting' event to access to socket.rooms upon disconnection (#2332)
-  * [fix] Fix query string management (#2422)
-  * [fix] add quote to exec paths, prevent error when spaces in path (#2508)
-  * [docs] Prevent mixup for new programmers (#2599)
-  * [example] Fix chat display in Firefox (#2477)
-  * [chore] Add gulp & babel in the build process (#2471)
-  * [chore] Bump engine.io to 1.7.0 (#2707)
-  * [chore] Remove unused zuul-ngrok dependency (#2708)
-  * [chore] Point towards current master of socket.io-client (#2710)
-  * [chore] Restrict files included in npm package (#2709)
-  * [chore] Link build badge to master branch (#2549)
-
-1.4.8 / 2016-06-23
-==================
-
-  * package: bump `engine.io`
-
-1.4.7 / 2016-06-23
-==================
-
-  * package: bump `engine.io`
-
-1.4.6 / 2016-05-02
-==================
-
-  * package: bump engine.io
-
-1.4.5 / 2016-01-26
-==================
-
-  * fix closing the underlying `http.Server`
-
-1.4.4 / 2016-01-10
-==================
-
-  * package: bump `engine.io`
-
-1.4.3 / 2016-01-08
-==================
-
-  * bump `socket.io-client`
-
-1.4.2 / 2016-01-07
-==================
-
-  * bump `engine.io`
-
-1.4.1 / 2016-01-07
-==================
-
-  * version bump
-
-1.4.0 / 2015-11-28
-==================
-
-  * socket.io: increase large binary data test timeout
-  * package: bump `engine.io` for release
-  * trigger callback even when joining an already joined room
-  * package: bump parser
-  * namespace: clear rooms flag after a clients call (fixes #1978)
-  * package: bump `socket.io-parser`
-  * fixed tests with large data
-  * fixed a typo in the example code
-  * package: bump mocha
-  * package: bump `has-binary` and `zuul-ngrok`
-  * package: bump `engine.io` and `socket.io-client`
-  * README: clarified documentation of Socket.in
-  * README: fixed up legacy repo links
-  * test: better timeout for stress test
-  * socket: don't set request property which has a getter
-  * removed proxy index file
-  * support flags on namespace
-  * improve Socket#packet and Client#packet
-  * socket: warn node_redis-style about missing `error`
-  * test: added failing test
-  * test: increase timeout for large binary data test
-  * package: bump `has-binary` to work with all objects (fixes #1955)
-  * fix origin verification default https port [evanlucas]
-  * support compression [nkzawa]
-  * changed type of `Client#sockets`, `Namespace#sockets` and `Socket#rooms` to maps (instead of arrays)
-
-1.3.7 / 2015-09-21
-==================
-
-  * package: bump `socket.io-client` for node4 compatibility
-  * package: bump `engine.io` for node4 compatibility
-
-1.3.6 / 2015-07-14
-==================
-
-  * package: bump `engine.io` to fix build on windows
-
-1.3.5 / 2015-03-03
-==================
-
- * package: bump `socket.io-parser`
-
-1.3.4 / 2015-02-14
-==================
-
- * package: bump `socket.io-client`
-
-1.3.3 / 2015-02-03
-==================
-
- * socket: warn node_redis-style about missing `error`
- * package: bump parser to better handle bad binary packets
-
-1.3.2 / 2015-01-19
-==================
-
- * no change on this release
-
-1.3.1 / 2015-01-19
-==================
-
- * no change on this release
- * package: bump `engine.io`
-
-1.3.0 / 2015-01-19
-==================
-
- * package: bump `engine.io`
- * add test for reconnection after server restarts [rase-]
- * update license with up-to-date year range [fay-jai]
- * fix leaving unknown rooms [defunctzombie]
- * allow null origins when allowed origins is a function [drewblaisdell]
- * fix tests on node 0.11
- * package: fix `npm test` to run on windows
- * package: bump `debug` v2.1.0 [coderaiser]
- * added tests for volatile [rase-]
-
-1.2.1 / 2014-11-21
-==================
-
- * fix protocol violations and improve error handling (GH-1880)
- * package: bump `engine.io` for websocket leak fix [3rd-Eden]
- * style tweaks
-
-1.2.0 / 2014-10-27
-==================
-
- * package: bump `engine.io`
- * downloads badge
- * add test to check that empty rooms are autopruned
- * added Server#origins(v:Function) description for dynamic CORS
- * added test coverage for Server#origins(function) for dynamic CORS
- * added optional Server#origins(function) for dynamic CORS
- * fix usage example for Server#close
- * package: fix main file for example application 'chat'
- * package: bump `socket.io-parser`
- * update README http ctor to createServer()
- * bump adapter with a lot of fixes for room bookkeeping
-
-1.1.0 / 2014-09-04
-==================
-
- * examples: minor fix of escaping
- * testing for equivalence of namespaces starting with / or without
- * update index.js
- * added relevant tests
- * take "" and "/" as equivalent namespaces on server
- * use svg instead of png to get better image quality in readme
- * make CI build faster
- * fix splice arguments and `socket.rooms` value update in `socket.leaveAll`.
- * client cannot connect to non-existing namespaces
- * bump engine.io version to get the cached IP address
- * fixed handshake object address property and made the test case more strict.
- * package: bump `engine.io`
- * fixed the failing test where server crashes on disconnect involving connectBuffer
- * npmignore: ignore `.gitignore` (fixes #1607)
- * test: added failing case for `socket.disconnect` and nsps
- * fix repo in package.json
- * improve Close documentation
- * use ephemeral ports
- * fix: We should use the standard http protocol to handler the etag header.
- * override default browser font-family for inputs
- * update has-binary-data to 1.0.3
- * add close specs
- * add ability to stop the http server even if not created inside socket.io
- * make sure server gets close
- * Add test case for checking that reconnect_failed is fired only once upon failure
- * package: bump `socket.io-parser` for `component-emitter` dep fix
-
-1.0.6 / 2014-06-19
-==================
-
- * package: bump `socket.io-client`
-
-1.0.5 / 2014-06-16
-==================
-
- * package: bump `engine.io` to fix jsonp `\n` bug and CORS warnings
- * index: fix typo [yanatan16]
- * add `removeListener` to blacklisted events
- * examples: clearer instructions to install chat example
- * index: fix namespace `connectBuffer` issue
-
-1.0.4 / 2014-06-02
-==================
-
- * package: bump socket.io-client
-
-1.0.3 / 2014-05-31
-==================
-
- * package: bump `socket.io-client`
- * package: bump `socket.io-parser` for binary ACK fix
- * package: bump `engine.io` for binary UTF8 fix
- * example: fix XSS in chat example
-
-1.0.2 / 2014-05-28
-==================
-
- * package: bump `socket.io-parser` for windows fix
-
-1.0.1 / 2014-05-28
-==================
-
- * bump due to bad npm tag
-
-1.0.0 / 2014-05-28
-==================
-
- * stable release
-
-1.0.0-pre5 / 2014-05-22
-=======================
-
- * package: bump `socket.io-client` for parser fixes
- * package: bump `engine.io`
-
-1.0.0-pre4 / 2014-05-19
-=======================
-
- * package: bump client
-
-1.0.0-pre3 / 2014-05-17
-=======================
-
- * package: bump parser
- * package: bump engine.io
-
-1.0.0-pre2 / 2014-04-27
-=======================
-
- * package: bump `engine.io`
- * added backwards compatible of engine.io maxHttpBufferSize
- * added test that server and client using same protocol
- * added support for setting allowed origins
- * added information about logging
- * the set function in server can be used to set some attributes for BC
- * fix error in callback call 'done' instead of 'next' in docs
- * package: bump `socket.io-parser`
- * package: bump `expect.js`
- * added some new tests, including binary with acks
-
-1.0.0-pre / 2014-03-14
-======================
-
- * implemented `engine.io`
- * implemented `socket.io-adapter`
- * implemented `socket.io-protocol`
- * implemented `debug` and improved instrumentation
- * added binary support
- * added new `require('io')(srv)` signature
- * simplified `socket.io-client` serving
-
-0.9.14 / 2013-03-29
-===================
-
-  * manager: fix memory leak with SSL [jpallen]
-
-0.9.13 / 2012-12-13
-===================
-
-  * package: fixed `base64id` requirement
-
-0.9.12 / 2012-12-13
-===================
-
-  * manager: fix for latest node which is returning a clone with `listeners` [viirya]
-
-0.9.11 / 2012-11-02
-===================
-
-  * package: move redis to optionalDependenices [3rd-Eden]
-  * bumped client
-
-0.9.10 / 2012-08-10
-===================
-
-  * Don't lowercase log messages
-  * Always set the HTTP response in case an error should be returned to the client
-  * Create or destroy the flash policy server on configuration change
-  * Honour configuration to disable flash policy server
-  * Add express 3.0 instructions on Readme.md
-  * Bump client
-
-0.9.9 / 2012-08-01
-==================
-
-  * Fixed sync disconnect xhrs handling
-  * Put license text in its own file (#965)
-  * Add warning to .listen() to ease the migration to Express 3.x
-  * Restored compatibility with node 0.4.x
-
-0.9.8 / 2012-07-24
-==================
-
-  * Bumped client.
-
-0.9.7 / 2012-07-24
-==================
-
-  * Prevent crash when socket leaves a room twice.
-  * Corrects unsafe usage of for..in
-  * Fix for node 0.8 with `gzip compression` [vadimi]
-  * Update redis to support Node 0.8.x
-  * Made ID generation securely random
-  * Fix Redis Store race condition in manager onOpen unsubscribe callback
-  * Fix for EventEmitters always reusing the same Array instance for listeners
-
-0.9.6 / 2012-04-17
-==================
-
-  * Fixed XSS in jsonp-polling.
-
-0.9.5 / 2012-04-05
-==================
-
-  * Added test for polling and socket close.
-  * Ensure close upon request close.
-  * Fix disconnection reason being lost for polling transports.
-  * Ensure that polling transports work with Connection: close.
-  * Log disconnection reason.
-
-0.9.4 / 2012-04-01
-==================
-
-  * Disconnecting from namespace improvement (#795) [DanielBaulig]
-  * Bumped client with polling reconnection loop (#438)
-
-0.9.3 / 2012-03-28
-==================
-
-  * Fix "Syntax error" on FF Web Console with XHR Polling [mikito]
-
-0.9.2 / 2012-03-13
-==================
-
-  * More sensible close `timeout default` (fixes disconnect issue)
-
-0.9.1-1 / 2012-03-02
-====================
-
-  * Bumped client with NPM dependency fix.
-
-0.9.1 / 2012-03-02
-==================
-
-  * Changed heartbeat timeout and interval defaults (60 and 25 seconds)
-  * Make tests work both on 0.4 and 0.6
-  * Updated client (improvements + bug fixes).
-
-0.9.0 / 2012-02-26
-==================
-
-  * Make it possible to use a regexp to match the socket.io resource URL.
-    We need this because we have to prefix the socket.io URL with a variable ID.
-  * Supplemental fix to gavinuhma/authfix, it looks like the same Access-Control-Origin logic is needed in the http and xhr-polling transports
-  * Updated express dep for windows compatibility.
-  * Combine two substr calls into one in decodePayload to improve performance
-  * Minor documentation fix
-  * Minor. Conform to style of other files.
-  * Switching setting to 'match origin protocol'
-  * Revert "Fixes leaking Redis subscriptions for #663. The local flag was not getting passed through onClientDisconnect()."
-  * Revert "Handle leaked dispatch:[id] subscription."
-  * Merge pull request #667 from dshaw/patch/redis-disconnect
-  * Handle leaked dispatch:[id] subscription.
-  * Fixes leaking Redis subscriptions for #663. The local flag was not getting passed through onClientDisconnect().
-  * Prevent memory leaking on uncompleted requests & add max post size limitation
-  * Fix for testcase
-  * Set Access-Control-Allow-Credentials true, regardless of cookie
-  * Remove assertvarnish from package as it breaks on 0.6
-  * Correct irc channel
-  * Added proper return after reserved field error
-  * Fixes manager.js failure to close connection after transport error has happened
-  * Added implicit port 80 for origin checks. fixes #638
-  * Fixed bug #432 in 0.8.7
-  * Set Access-Control-Allow-Origin header to origin to enable withCredentials
-  * Adding configuration variable matchOriginProtocol
-  * Fixes location mismatch error in Safari.
-  * Use tty to detect if we should add colors or not by default.
-  * Updated the package location.
-
-0.8.7 / 2011-11-05
-==================
-
-  * Fixed memory leaks in closed clients.
-  * Fixed memory leaks in namespaces.
-  * Fixed websocket handling for malformed requests from proxies. [einaros]
-  * Node 0.6 compatibility. [einaros] [3rd-Eden]
-  * Adapted tests and examples.
-
-0.8.6 / 2011-10-27 
-==================
-
-  * Added JSON decoding on jsonp-polling transport.
-  * Fixed README example.
-  * Major speed optimizations [3rd-Eden] [einaros] [visionmedia]
-  * Added decode/encode benchmarks [visionmedia]
-  * Added support for black-listing client sent events.
-  * Fixed logging options, closes #540 [3rd-Eden]
-  * Added vary header for gzip [3rd-Eden]
-  * Properly cleaned up async websocket / flashsocket tests, after patching node-websocket-client
-  * Patched to properly shut down when a finishClose call is made during connection establishment
-  * Added support for socket.io version on url and far-future Expires [3rd-Eden] [getify]
-  * Began IE10 compatibility [einaros] [tbranyen]
-  * Misc WebSocket fixes [einaros]
-  * Added UTF8 to respone headers for htmlfile [3rd-Eden]
-
-0.8.5 / 2011-10-07
-==================
-
-  * Added websocket draft HyBi-16 support. [einaros]
-  * Fixed websocket continuation bugs. [einaros]
-  * Fixed flashsocket transport name.
-  * Fixed websocket tests.
-  * Ensured `parser#decodePayload` doesn't choke.
-  * Added http referrer verification to manager verifyOrigin.
-  * Added access control for cross domain xhr handshakes [3rd-Eden]
-  * Added support for automatic generation of socket.io files [3rd-Eden]
-  * Added websocket binary support [einaros]
-  * Added gzip support for socket.io.js [3rd-Eden]
-  * Expose socket.transport [3rd-Eden]
-  * Updated client.
-
-0.8.4 / 2011-09-06
-==================
-
-  * Client build
-
-0.8.3 / 2011-09-03
-==================
-
-  * Fixed `\n` parsing for non-JSON packets (fixes #479).
-  * Fixed parsing of certain unicode characters (fixes #451).
-  * Fixed transport message packet logging.
-  * Fixed emission of `error` event resulting in an uncaught exception if unhandled (fixes #476).
-  * Fixed; allow for falsy values as the configuration value of `log level` (fixes #491).
-  * Fixed repository URI in `package.json`. Fixes #504.
-  * Added text/plain content-type to handshake responses [einaros]
-  * Improved single byte writes [einaros]
-  * Updated socket.io-flashsocket default port from 843 to 10843 [3rd-Eden]
-  * Updated client.
-
-0.8.2 / 2011-08-29
-==================
-
-  * Updated client.
-
-0.8.1 / 2011-08-29
-==================
-
-  * Fixed utf8 bug in send framing in websocket [einaros]
-  * Fixed typo in docs [Znarkus]
-  * Fixed bug in send framing for over 64kB of data in websocket [einaros]
-  * Corrected ping handling in websocket transport [einaros]
-
-0.8.0 / 2011-08-28
-==================
-
-  * Updated to work with two-level websocket versioning. [einaros]
-  * Added hybi07 support. [einaros]
-  * Added hybi10 support. [einaros]
-  * Added http referrer verification to manager.js verifyOrigin. [einaors]
-
-0.7.11 / 2011-08-27
-===================
-
-  * Updated socket.io-client.
-
-0.7.10 / 2011-08-27
-===================
-
-  * Updated socket.io-client.
-
-0.7.9 / 2011-08-12
-==================
-
-  * Updated socket.io-client.
-  * Make sure we only do garbage collection when the server we receive is actually run.
-
-0.7.8 / 2011-08-08
-==================
-
-  * Changed; make sure sio#listen passes options to both HTTP server and socket.io manager.
-  * Added docs for sio#listen.
-  * Added options parameter support for Manager constructor.
-  * Added memory leaks tests and test-leaks Makefile task.
-  * Removed auto npm-linking from make test.
-  * Make sure that you can disable heartbeats. [3rd-Eden]
-  * Fixed rooms memory leak [3rd-Eden]
-  * Send response once we got all POST data, not immediately [Pita]
-  * Fixed onLeave behavior with missing clientsk [3rd-Eden]
-  * Prevent duplicate references in rooms.
-  * Added alias for `to` to `in` and `in` to `to`.
-  * Fixed roomClients definition.
-  * Removed dependency on redis for installation without npm [3rd-Eden]
-  * Expose path and querystring in handshakeData [3rd-Eden]
-
-0.7.7 / 2011-07-12
-==================
-
-  * Fixed double dispatch handling with emit to closed clients.
-  * Added test for emitting to closed clients to prevent regression.
-  * Fixed race condition in redis test.
-  * Changed Transport#end instrumentation.
-  * Leveraged $emit instead of emit internally.
-  * Made tests faster.
-  * Fixed double disconnect events.
-  * Fixed disconnect logic
-  * Simplified remote events handling in Socket.
-  * Increased testcase timeout.
-  * Fixed unknown room emitting (GH-291). [3rd-Eden]
-  * Fixed `address` in handshakeData. [3rd-Eden]
-  * Removed transports definition in chat example.
-  * Fixed room cleanup
-  * Fixed; make sure the client is cleaned up after booting.
-  * Make sure to mark the client as non-open if the connection is closed.
-  * Removed unneeded `buffer` declarations.
-  * Fixed; make sure to clear socket handlers and subscriptions upon transport close.
-
-0.7.6 / 2011-06-30
-==================
-
-  * Fixed general dispatching when a client has closed.
-
-0.7.5 / 2011-06-30
-==================
-
-  * Fixed dispatching to clients that are disconnected.
-
-0.7.4 / 2011-06-30
-==================
-
-  * Fixed; only clear handlers if they were set. [level09]
-
-0.7.3 / 2011-06-30
-==================
-
-  * Exposed handshake data to clients.
-  * Refactored dispatcher interface.
-  * Changed; Moved id generation method into the manager.
-  * Added sub-namespace authorization. [3rd-Eden]
-  * Changed; normalized SocketNamespace local eventing [dvv]
-  * Changed; Use packet.reason or default to 'packet' [3rd-Eden]
-  * Changed console.error to console.log.
-  * Fixed; bind both servers at the same time do that the test never times out.
-  * Added 304 support.
-  * Removed `Transport#name` for abstract interface.
-  * Changed; lazily require http and https module only when needed. [3rd-Eden]
-
-0.7.2 / 2011-06-22
-==================
-
-  * Make sure to write a packet (of type `noop`) when closing a poll.
-    This solves a problem with cross-domain requests being flagged as aborted and
-    reconnection being triggered.
-  * Added `noop` message type.
-
-0.7.1 / 2011-06-21 
-==================
-
-  * Fixed cross-domain XHR.
-  * Added CORS test to xhr-polling suite.
-
-0.7.0 / 2010-06-21
-==================
-
-  * http://socket.io/announcement.html
diff --git a/package.json b/package.json
index d6a5d1658c..3fcc8f56db 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "socket.io",
-  "version": "2.0.3",
+  "version": "2.0.4",
   "description": "node.js realtime framework server",
   "keywords": [
     "realtime",
@@ -27,7 +27,7 @@
     "debug": "~2.6.6",
     "engine.io": "~3.1.0",
     "socket.io-adapter": "~1.1.0",
-    "socket.io-client": "~2.0.2",
+    "socket.io-client": "2.0.4",
     "socket.io-parser": "~3.1.1"
   },
   "devDependencies": {

From 52b09609db04e8691ba9307009e54dd528929a86 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Sun, 25 Feb 2018 09:22:40 +0100
Subject: [PATCH 13/59] [chore] Bump debug to version 3.1.0

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 3fcc8f56db..e48ac994eb 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "test": "nyc mocha --reporter spec --slow 200 --bail --timeout 10000 test/socket.io.js"
   },
   "dependencies": {
-    "debug": "~2.6.6",
+    "debug": "~3.1.0",
     "engine.io": "~3.1.0",
     "socket.io-adapter": "~1.1.0",
     "socket.io-client": "2.0.4",

From c06ac071d04578e2f50dc8a785e66019dbb81144 Mon Sep 17 00:00:00 2001
From: Devlin Pajaron <iamdevlinph@gmail.com>
Date: Sun, 25 Feb 2018 16:26:24 +0800
Subject: [PATCH 14/59] [docs] Fix typo (#3157)

---
 Readme.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Readme.md b/Readme.md
index 5df48abac8..7541835e4b 100644
--- a/Readme.md
+++ b/Readme.md
@@ -38,7 +38,7 @@ Unless instructed otherwise a disconnected client will try to reconnect forever,
 
 #### Disconnection detection
 
-An heartbeat mechanism is implemented at the Engine.IO level, allowing both the server and the client to know when the other one is not responding anymore.
+A heartbeat mechanism is implemented at the Engine.IO level, allowing both the server and the client to know when the other one is not responding anymore.
 
 That functionality is achieved with timers set on both the server and the client, with timeout values (the `pingInterval` and `pingTimeout` parameters) shared during the connection handshake. Those timers require any subsequent client calls to be directed to the same server, hence the `sticky-session` requirement when using multiples nodes.
 

From 0539a2c4fd1c5e5468d3933200ef07c1377c57d4 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Wed, 28 Feb 2018 22:56:28 +0100
Subject: [PATCH 15/59] [test] Update travis configuration

---
 .travis.yml | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 44ab05c343..aa2c7cee84 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,12 +1,14 @@
-sudo: false
 language: node_js
+sudo: false
 node_js:
-  - "4"
-  - "6"
-  - "7"
-
-git:
-  depth: 1
-
+  - '4'
+  - '6'
+  - '8'
+  - node
 notifications:
   irc: "irc.freenode.org#socket.io"
+git:
+  depth: 1
+cache:
+  directories:
+    - node_modules

From f48a06c040280b44f90fd225c888910544fd63b5 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Wed, 28 Feb 2018 23:00:16 +0100
Subject: [PATCH 16/59] [feat] Add a 'binary' flag (#3185)

So that the call to the `has-binary` method can be skipped. Usage:

```
// with binary data
socket.binary(true).emit("binary", obj);

// without binary data
socket.binary(false).emit("string", obj);

// call to hasBin
socket.emit("guess", obj);
```
---
 docs/API.md      | 21 +++++++++++++++++++++
 docs/emit.md     |  5 ++++-
 lib/index.js     |  2 +-
 lib/namespace.js | 19 ++++++++++++++++++-
 lib/socket.js    | 18 ++++++++++++++++--
 package.json     |  3 ++-
 6 files changed, 62 insertions(+), 6 deletions(-)

diff --git a/docs/API.md b/docs/API.md
index 4bfadddd43..e59e75886c 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -33,6 +33,7 @@
     - [Event: 'connection'](#event-connect)
     - [Flag: 'volatile'](#flag-volatile)
     - [Flag: 'local'](#flag-local)
+    - [Flag: 'binary'](#flag-binary)
   - [Class: Socket](#socket)
     - [socket.id](#socketid)
     - [socket.rooms](#socketrooms)
@@ -57,6 +58,7 @@
     - [socket.disconnect(close)](#socketdisconnectclose)
     - [Flag: 'broadcast'](#flag-broadcast)
     - [Flag: 'volatile'](#flag-volatile-1)
+    - [Flag: 'binary'](#flag-binary-1)
     - [Event: 'disconnect'](#event-disconnect)
     - [Event: 'error'](#event-error)
     - [Event: 'disconnecting'](#event-disconnecting)
@@ -470,6 +472,14 @@ Sets a modifier for a subsequent event emission that the event data may be lost
 io.volatile.emit('an event', { some: 'data' }); // the clients may or may not receive it
 ```
 
+#### Flag: 'binary'
+
+Specifies whether there is binary data in the emitted data. Increases performance when specified. Can be `true` or `false`.
+
+```js
+io.binary(false).emit('an event', { some: 'data' });
+```
+
 #### Flag: 'local'
 
 Sets a modifier for a subsequent event emission that the event data will only be _broadcast_ to the current node (when the [Redis adapter](https://github.com/socketio/socket.io-redis) is used).
@@ -769,6 +779,17 @@ io.on('connection', (socket) => {
 });
 ```
 
+#### Flag: 'binary'
+
+Specifies whether there is binary data in the emitted data. Increases performance when specified. Can be `true` or `false`.
+
+```js
+var io = require('socket.io')();
+io.on('connection', function(socket){
+  socket.binary(false).emit('an event', { some: 'data' }); // The data to send has no binary data
+});
+```
+
 #### Event: 'disconnect'
 
   - `reason` _(String)_ the reason of the disconnection (either client or server-side)
diff --git a/docs/emit.md b/docs/emit.md
index 96ff26f7e4..86996680f2 100644
--- a/docs/emit.md
+++ b/docs/emit.md
@@ -40,9 +40,12 @@ function onConnect(socket){
   // sending a message that might be dropped if the client is not ready to receive messages
   socket.volatile.emit('maybe', 'do you really need it?');
 
+  // specifying whether the data to send has binary data
+  socket.binary(false).emit('what', 'I have no binaries!');
+
   // sending to all clients on this node (when using multiple nodes)
   io.local.emit('hi', 'my lovely babies');
-  
+
   // sending to all connected clients
   io.emit('an event sent to all connected clients');
 
diff --git a/lib/index.js b/lib/index.js
index e16133ae4c..192504f77f 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -451,7 +451,7 @@ var emitterMethods = Object.keys(Emitter.prototype).filter(function(key){
   return typeof Emitter.prototype[key] === 'function';
 });
 
-emitterMethods.concat(['to', 'in', 'use', 'send', 'write', 'clients', 'compress']).forEach(function(fn){
+emitterMethods.concat(['to', 'in', 'use', 'send', 'write', 'clients', 'compress', 'binary']).forEach(function(fn){
   Server.prototype[fn] = function(){
     return this.sockets[fn].apply(this.sockets, arguments);
   };
diff --git a/lib/namespace.js b/lib/namespace.js
index 0b0657ba8c..587dad8649 100644
--- a/lib/namespace.js
+++ b/lib/namespace.js
@@ -6,6 +6,7 @@
 var Socket = require('./socket');
 var Emitter = require('events').EventEmitter;
 var parser = require('socket.io-parser');
+var hasBin = require('has-binary2');
 var debug = require('debug')('socket.io:namespace');
 
 /**
@@ -214,7 +215,10 @@ Namespace.prototype.emit = function(ev){
   }
   // set up packet object
   var args = Array.prototype.slice.call(arguments);
-  var packet = { type: parser.EVENT, data: args };
+  var packet = {
+    type: (this.flags.binary !== undefined ? this.flags.binary : hasBin(args)) ? parser.BINARY_EVENT : parser.EVENT,
+    data: args
+  };
 
   if ('function' == typeof args[args.length - 1]) {
     throw new Error('Callbacks are not supported when broadcasting');
@@ -277,3 +281,16 @@ Namespace.prototype.compress = function(compress){
   this.flags.compress = compress;
   return this;
 };
+
+/**
+ * Sets the binary flag
+ *
+ * @param {Boolean} Encode as if it has binary data if `true`, Encode as if it doesnt have binary data if `false`
+ * @return {Socket} self
+ * @api public
+ */
+
+ Namespace.prototype.binary = function (binary) {
+   this.flags.binary = binary;
+   return this;
+ };
diff --git a/lib/socket.js b/lib/socket.js
index 6c6bcde3e7..6cf9b52864 100644
--- a/lib/socket.js
+++ b/lib/socket.js
@@ -5,6 +5,7 @@
 
 var Emitter = require('events').EventEmitter;
 var parser = require('socket.io-parser');
+var hasBin = require('has-binary2');
 var url = require('url');
 var debug = require('debug')('socket.io:socket');
 
@@ -143,7 +144,7 @@ Socket.prototype.emit = function(ev){
 
   var args = Array.prototype.slice.call(arguments);
   var packet = {
-    type: parser.EVENT,
+    type: (this.flags.binary !== undefined ? this.flags.binary : hasBin(args)) ? parser.BINARY_EVENT : parser.EVENT,
     data: args
   };
 
@@ -380,7 +381,7 @@ Socket.prototype.ack = function(id){
 
     self.packet({
       id: id,
-      type: parser.ACK,
+      type: hasBin(args) ? parser.BINARY_ACK : parser.ACK,
       data: args
     });
 
@@ -495,6 +496,19 @@ Socket.prototype.compress = function(compress){
   return this;
 };
 
+/**
+ * Sets the binary flag
+ *
+ * @param {Boolean} Encode as if it has binary data if `true`, Encode as if it doesnt have binary data if `false`
+ * @return {Socket} self
+ * @api public
+ */
+
+ Socket.prototype.binary = function (binary) {
+   this.flags.binary = binary;
+   return this;
+ };
+
 /**
  * Dispatch incoming event to socket listeners.
  *
diff --git a/package.json b/package.json
index e48ac994eb..c83f13ef5f 100644
--- a/package.json
+++ b/package.json
@@ -26,9 +26,10 @@
   "dependencies": {
     "debug": "~3.1.0",
     "engine.io": "~3.1.0",
+    "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
     "socket.io-client": "2.0.4",
-    "socket.io-parser": "~3.1.1"
+    "socket.io-parser": "~3.2.0"
   },
   "devDependencies": {
     "expect.js": "0.3.1",

From a23007a63575915b87a525f30f856e24ce5115d1 Mon Sep 17 00:00:00 2001
From: Miguel Piedrafita <github@miguelpiedrafita.com>
Date: Wed, 28 Feb 2018 23:03:02 +0100
Subject: [PATCH 17/59] [docs] Update license year (#3153)

---
 LICENSE | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/LICENSE b/LICENSE
index aea53a7090..6ce8c5ca1a 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 (The MIT License)
 
-Copyright (c) 2014-2017 Automattic <dev@cloudup.com>
+Copyright (c) 2014-2018 Automattic <dev@cloudup.com>
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the

From b1941d5dfe3d2530bb0f0391088d3c8765ae9695 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Wed, 28 Feb 2018 23:10:40 +0100
Subject: [PATCH 18/59] [chore] Bump engine.io to version 3.2.0

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index c83f13ef5f..71abdcb822 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   },
   "dependencies": {
     "debug": "~3.1.0",
-    "engine.io": "~3.1.0",
+    "engine.io": "~3.2.0",
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
     "socket.io-client": "2.0.4",

From dea5214f2154c5a6f46189c7d2e66674bd868992 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Wed, 28 Feb 2018 23:19:19 +0100
Subject: [PATCH 19/59] [chore] Bump superagent and supertest versions (#3186)

---
 package.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index 71abdcb822..4028122cdb 100644
--- a/package.json
+++ b/package.json
@@ -35,8 +35,8 @@
     "expect.js": "0.3.1",
     "mocha": "^3.5.3",
     "nyc": "^11.2.1",
-    "superagent": "1.6.1",
-    "supertest": "1.1.0"
+    "superagent": "^3.8.2",
+    "supertest": "^3.0.0"
   },
   "contributors": [
     {

From c0c79f019e7138194e438339f8192705957c8ec3 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Thu, 1 Mar 2018 00:22:16 +0100
Subject: [PATCH 20/59] [feat] Add support for dynamic namespaces (#3187)

---
 docs/API.md       | 17 +++++++++++
 lib/client.js     | 31 ++++++++++++++++----
 lib/index.js      | 48 ++++++++++++++++++++++++++++++
 test/socket.io.js | 75 +++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 166 insertions(+), 5 deletions(-)

diff --git a/docs/API.md b/docs/API.md
index e59e75886c..a78cc5ed35 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -20,6 +20,7 @@
     - [server.onconnection(socket)](#serveronconnectionsocket)
     - [server.of(nsp)](#serverofnsp)
     - [server.close([callback])](#serverclosecallback)
+    - [server.useNamespaceValidator(fn)](#serverusenamespacevalidatorfn)
   - [Class: Namespace](#namespace)
     - [namespace.name](#namespacename)
     - [namespace.connected](#namespaceconnected)
@@ -321,6 +322,22 @@ server.listen(PORT); // PORT is free to use
 io = Server(server);
 ```
 
+#### server.useNamespaceValidator(fn)
+
+  - `fn` _(Function)_
+
+Sets up server middleware to validate whether a new namespace should be created.
+
+```js
+io.useNamespaceValidator((nsp, next) => {
+  if (nsp === 'dynamic') {
+    next(null, true);
+  } else {
+    next(new Error('Invalid namespace'));
+  }
+});
+```
+
 #### server.engine.generateId
 
 Overwrites the default method to generate your custom socket id.
diff --git a/lib/client.js b/lib/client.js
index 0b5f0446e9..adb5d20f73 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -56,17 +56,38 @@ Client.prototype.setup = function(){
  * Connects a client to a namespace.
  *
  * @param {String} name namespace
+ * @param {String} query the query parameters
  * @api private
  */
 
 Client.prototype.connect = function(name, query){
-  debug('connecting to namespace %s', name);
-  var nsp = this.server.nsps[name];
-  if (!nsp) {
-    this.packet({ type: parser.ERROR, nsp: name, data : 'Invalid namespace'});
-    return;
+  if (this.server.nsps[name]) {
+    debug('connecting to namespace %s', name);
+    return this.doConnect(name, query);
   }
 
+  this.server.checkNamespace(name, (allow) => {
+    if (allow) {
+      debug('creating namespace %s', name);
+      this.doConnect(name, query);
+    } else {
+      debug('creation of namespace %s was denied', name);
+      this.packet({ type: parser.ERROR, nsp: name, data: 'Invalid namespace' });
+    }
+  });
+};
+
+/**
+ * Connects a client to a namespace.
+ *
+ * @param {String} name namespace
+ * @param {String} query the query parameters
+ * @api private
+ */
+
+Client.prototype.doConnect = function(name, query){
+  var nsp = this.server.of(name);
+
   if ('/' != name && !this.nsps['/']) {
     this.connectBuffer.push(name);
     return;
diff --git a/lib/index.js b/lib/index.js
index 192504f77f..21cfefc9aa 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -46,6 +46,7 @@ function Server(srv, opts){
   }
   opts = opts || {};
   this.nsps = {};
+  this.nspValidators = [];
   this.path(opts.path || '/socket.io');
   this.serveClient(false !== opts.serveClient);
   this.parser = opts.parser || parser;
@@ -157,6 +158,53 @@ Server.prototype.set = function(key, val){
   return this;
 };
 
+/**
+ * Sets up server middleware to validate incoming namespaces not already created on the server.
+ *
+ * @return {Server} self
+ * @api public
+ */
+
+Server.prototype.useNamespaceValidator = function(fn){
+  this.nspValidators.push(fn);
+  return this;
+};
+
+/**
+ * Executes the middleware for an incoming namespace not already created on the server.
+ *
+ * @param name of incomming namespace
+ * @param {Function} last fn call in the middleware
+ * @api private
+ */
+
+Server.prototype.checkNamespace = function(name, fn){
+  var fns = this.nspValidators.slice(0);
+  if (!fns.length) return fn(false);
+
+  var namespaceAllowed = false; // Deny unknown namespaces by default
+
+  function run(i){
+    fns[i](name, function(err, allow){
+      // upon error, short-circuit
+      if (err) return fn(false);
+
+      // if one piece of middleware explicitly denies namespace, short-circuit
+      if (allow === false) return fn(false);
+
+      namespaceAllowed = namespaceAllowed || allow === true;
+
+      // if no middleware left, summon callback
+      if (!fns[i + 1]) return fn(namespaceAllowed);
+
+      // go on to next
+      run(i + 1);
+    });
+  }
+
+  run(0);
+};
+
 /**
  * Sets the client serving path.
  *
diff --git a/test/socket.io.js b/test/socket.io.js
index f382d503d2..ae8cdcfab8 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -878,6 +878,81 @@ describe('socket.io', function(){
         });
       });
     });
+
+    describe('dynamic', function () {
+      it('should allow connections to dynamic namespaces', function(done){
+        var srv = http();
+        var sio = io(srv);
+        srv.listen(function(){
+          var namespace = '/dynamic';
+          var dynamic = client(srv, namespace);
+          sio.useNamespaceValidator(function(nsp, next) {
+            expect(nsp).to.be(namespace);
+            next(null, true);
+          });
+          dynamic.on('error', function(err) {
+            expect().fail();
+          });
+          dynamic.on('connect', function() {
+            expect(sio.nsps[namespace]).to.be.a(Namespace);
+            expect(Object.keys(sio.nsps[namespace].sockets).length).to.be(1);
+            done();
+          });
+        });
+      });
+
+      it('should not allow connections to dynamic namespaces if not supported', function(done){
+        var srv = http();
+        var sio = io(srv);
+        srv.listen(function(){
+          var namespace = '/dynamic';
+          sio.useNamespaceValidator(function(nsp, next) {
+            expect(nsp).to.be(namespace);
+            next(null, false);
+          });
+          sio.on('connect', function(socket) {
+            if (socket.nsp.name === namespace) {
+              expect().fail();
+            }
+          });
+
+          var dynamic = client(srv,namespace);
+          dynamic.on('connect', function(){
+            expect().fail();
+          });
+          dynamic.on('error', function(err) {
+            expect(err).to.be("Invalid namespace");
+            done();
+          });
+        });
+      });
+
+      it('should not allow connections to dynamic namespaces if there is an error', function(done){
+        var srv = http();
+        var sio = io(srv);
+        srv.listen(function(){
+          var namespace = '/dynamic';
+          sio.useNamespaceValidator(function(nsp, next) {
+            expect(nsp).to.be(namespace);
+            next(new Error(), true);
+          });
+          sio.on('connect', function(socket) {
+            if (socket.nsp.name === namespace) {
+              expect().fail();
+            }
+          });
+
+          var dynamic = client(srv,namespace);
+          dynamic.on('connect', function(){
+            expect().fail();
+          });
+          dynamic.on('error', function(err) {
+            expect(err).to.be("Invalid namespace");
+            done();
+          });
+        });
+      });
+    });
   });
 
   describe('socket', function(){

From be61ba0a202ceaf81390d78ae10d00fc95ce5f10 Mon Sep 17 00:00:00 2001
From: Jumper Chen <jumperchen@potix.com>
Date: Thu, 1 Mar 2018 07:23:45 +0800
Subject: [PATCH 21/59] =?UTF-8?q?[docs]=C2=A0Add=20link=20to=20a=20Dart=20?=
 =?UTF-8?q?client=20implementation=20(#2940)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Readme.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Readme.md b/Readme.md
index 7541835e4b..4d0c89ad1d 100644
--- a/Readme.md
+++ b/Readme.md
@@ -21,6 +21,7 @@ Some implementations in other languages are also available:
 - [Java](https://github.com/socketio/socket.io-client-java)
 - [C++](https://github.com/socketio/socket.io-client-cpp)
 - [Swift](https://github.com/socketio/socket.io-client-swift)
+- [Dart](https://github.com/rikulo/socket.io-client-dart)
 
 Its main features are:
 

From f4fc517e0fe25866c95b584291487b8cbdff889d Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Sat, 10 Mar 2018 08:51:22 +0100
Subject: [PATCH 22/59] [fix] Properly emit 'connect' when using a custom
 namespace (#3197)

When using a custom namespace with a middleware, the client did not receive the 'connect' event.

Fixes #3082
---
 lib/namespace.js  |  2 +-
 package.json      |  2 +-
 test/socket.io.js | 17 +++++++++++++++++
 3 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/lib/namespace.js b/lib/namespace.js
index 587dad8649..6d0ac17065 100644
--- a/lib/namespace.js
+++ b/lib/namespace.js
@@ -100,7 +100,7 @@ Namespace.prototype.initAdapter = function(){
  */
 
 Namespace.prototype.use = function(fn){
-  if (this.server.eio) {
+  if (this.server.eio && this.name === '/') {
     debug('removing initial packet');
     delete this.server.eio.initialPacket;
   }
diff --git a/package.json b/package.json
index 4028122cdb..6e88b231b5 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "engine.io": "~3.2.0",
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
-    "socket.io-client": "2.0.4",
+    "socket.io-client": "socketio/socket.io-client",
     "socket.io-parser": "~3.2.0"
   },
   "devDependencies": {
diff --git a/test/socket.io.js b/test/socket.io.js
index ae8cdcfab8..e0ff36f22d 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -2352,6 +2352,23 @@ describe('socket.io', function(){
         done();
       });
     });
+
+    it('should work with a custom namespace', (done) => {
+      var srv = http();
+      var sio = io();
+      sio.listen(srv);
+      sio.of('/chat').use(function(socket, next){
+        next();
+      });
+
+      var count = 0;
+      client(srv, '/').on('connect', () => {
+        if (++count === 2) done();
+      });
+      client(srv, '/chat').on('connect', () => {
+        if (++count === 2) done();
+      });
+    });
   });
 
   describe('socket middleware', function(done){

From 1f1d64bab61a273712a199591a3f76210d8c0959 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Sat, 10 Mar 2018 08:56:42 +0100
Subject: [PATCH 23/59] [fix] Include the protocol in the origins check (#3198)

Previously, the protocol was not taken in account, which caused the following behaviour:

```js
io.origins('https://foo.example.com:443'); // ok as a string
io.origins(['https://foo.example.com:443'); // not ok as an array
```

Fixes #3190
---
 docs/API.md       |  4 ++--
 lib/index.js      |  4 +++-
 test/socket.io.js | 11 +++++++++++
 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/docs/API.md b/docs/API.md
index a78cc5ed35..0465c4556e 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -225,13 +225,13 @@ io.adapter(redis({ host: 'localhost', port: 6379 }));
 
 #### server.origins([value])
 
-  - `value` _(String)_
+  - `value` _(String|String[])_
   - **Returns** `Server|String`
 
 Sets the allowed origins `value`. Defaults to any origins being allowed. If no arguments are supplied this method returns the current value.
 
 ```js
-io.origins(['foo.example.com:443']);
+io.origins(['https://foo.example.com:443']);
 ```
 
 #### server.origins(fn)
diff --git a/lib/index.js b/lib/index.js
index 21cfefc9aa..016353966f 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -80,9 +80,11 @@ Server.prototype.checkRequest = function(req, fn) {
         ? parts.port
         : defaultPort;
       var ok =
+        ~this._origins.indexOf(parts.protocol + '//' + parts.hostname + ':' + parts.port) ||
         ~this._origins.indexOf(parts.hostname + ':' + parts.port) ||
         ~this._origins.indexOf(parts.hostname + ':*') ||
         ~this._origins.indexOf('*:' + parts.port);
+      debug('origin %s is %svalid', origin, !!ok ? '' : 'not ');
       return fn(null, !!ok);
     } catch (ex) {
     }
@@ -241,7 +243,7 @@ Server.prototype.adapter = function(v){
 /**
  * Sets the allowed origins for requests.
  *
- * @param {String} v origins
+ * @param {String|String[]} v origins
  * @return {Server|Adapter} self when setting or value when getting
  * @api public
  */
diff --git a/test/socket.io.js b/test/socket.io.js
index e0ff36f22d..c5f96dc63e 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -354,6 +354,17 @@ describe('socket.io', function(){
           done();
         });
     });
+
+    it('should allow request when using an array of origins', function(done) {
+      io({ origins: [ 'http://foo.example:54024' ] }).listen('54024');
+      request.get('http://localhost:54024/socket.io/default/')
+        .set('origin', 'http://foo.example:54024')
+        .query({ transport: 'polling' })
+        .end(function (err, res) {
+          expect(res.status).to.be(200);
+          done();
+        });
+    });
   });
 
   describe('close', function(){

From ad0c052eff1d7d0631214abfa4e14d7fef5cfaec Mon Sep 17 00:00:00 2001
From: Scott Gress <scott@pigandcow.com>
Date: Sat, 10 Mar 2018 02:03:28 -0600
Subject: [PATCH 24/59] [docs] Add note in docs for `origins(fn)` about `error`
 needing to be a string. (#2895)

---
 docs/API.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/API.md b/docs/API.md
index 0465c4556e..3b5e1b28d7 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -239,7 +239,7 @@ io.origins(['https://foo.example.com:443']);
   - `fn` _(Function)_
   - **Returns** `Server`
 
-Provides a function taking two arguments `origin:String` and `callback(error, success)`, where `success` is a boolean value indicating whether origin is allowed or not.
+Provides a function taking two arguments `origin:String` and `callback(error, success)`, where `success` is a boolean value indicating whether origin is allowed or not.  If `success` is set to `false`, `error` must be provided as a string value that will be appended to the server response, e.g. "Origin not allowed".
 
 __Potential drawbacks__:
 * in some situations, when it is not possible to determine `origin` it may have value of `*`

From ac945d1eba2c0e126c6750d5eccbdb861e0abc56 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Thu, 29 Mar 2018 23:08:08 +0200
Subject: [PATCH 25/59]  [feat] Add support for dynamic namespaces (#3195)

This follows #3187, with a slightly different API.

A dynamic namespace can be created with:

```js
io.of(/^\/dynamic-\d+$/).on('connect', (socket) => { /* ... */ });
```
---
 docs/API.md             | 47 ++++++++++++--------
 lib/client.js           |  8 ++--
 lib/index.js            | 72 +++++++++++++++---------------
 lib/parent-namespace.js | 39 ++++++++++++++++
 test/socket.io.js       | 98 +++++++++++++++++------------------------
 5 files changed, 147 insertions(+), 117 deletions(-)
 create mode 100644 lib/parent-namespace.js

diff --git a/docs/API.md b/docs/API.md
index 3b5e1b28d7..80d184017a 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -20,7 +20,6 @@
     - [server.onconnection(socket)](#serveronconnectionsocket)
     - [server.of(nsp)](#serverofnsp)
     - [server.close([callback])](#serverclosecallback)
-    - [server.useNamespaceValidator(fn)](#serverusenamespacevalidatorfn)
   - [Class: Namespace](#namespace)
     - [namespace.name](#namespacename)
     - [namespace.connected](#namespaceconnected)
@@ -293,7 +292,7 @@ Advanced use only. Creates a new `socket.io` client from the incoming engine.io
 
 #### server.of(nsp)
 
-  - `nsp` _(String)_
+  - `nsp` _(String|RegExp|Function)_
   - **Returns** `Namespace`
 
 Initializes and retrieves the given `Namespace` by its pathname identifier `nsp`. If the namespace was already initialized it returns it immediately.
@@ -302,6 +301,34 @@ Initializes and retrieves the given `Namespace` by its pathname identifier `nsp`
 const adminNamespace = io.of('/admin');
 ```
 
+A regex or a function can also be provided, in order to create namespace in a dynamic way:
+
+```js
+const dynamicNsp = io.of(/^\/dynamic-\d+$/).on('connect', (socket) => {
+  const newNamespace = socket.nsp; // newNamespace.name === '/dynamic-101'
+
+  // broadcast to all clients in the given sub-namespace
+  newNamespace.emit('hello');
+});
+
+// client-side
+const socket = io('/dynamic-101');
+
+// broadcast to all clients in each sub-namespace
+dynamicNsp.emit('hello');
+
+// use a middleware for each sub-namespace
+dynamicNsp.use((socket, next) => { /* ... */ });
+```
+
+With a function:
+
+```js
+io.of((name, query, next) => {
+  next(null, checkToken(query.token));
+}).on('connect', (socket) => { /* ... */ });
+```
+
 #### server.close([callback])
 
   - `callback` _(Function)_
@@ -322,22 +349,6 @@ server.listen(PORT); // PORT is free to use
 io = Server(server);
 ```
 
-#### server.useNamespaceValidator(fn)
-
-  - `fn` _(Function)_
-
-Sets up server middleware to validate whether a new namespace should be created.
-
-```js
-io.useNamespaceValidator((nsp, next) => {
-  if (nsp === 'dynamic') {
-    next(null, true);
-  } else {
-    next(new Error('Invalid namespace'));
-  }
-});
-```
-
 #### server.engine.generateId
 
 Overwrites the default method to generate your custom socket id.
diff --git a/lib/client.js b/lib/client.js
index adb5d20f73..32d179f971 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -56,7 +56,7 @@ Client.prototype.setup = function(){
  * Connects a client to a namespace.
  *
  * @param {String} name namespace
- * @param {String} query the query parameters
+ * @param {Object} query the query parameters
  * @api private
  */
 
@@ -66,9 +66,9 @@ Client.prototype.connect = function(name, query){
     return this.doConnect(name, query);
   }
 
-  this.server.checkNamespace(name, (allow) => {
-    if (allow) {
-      debug('creating namespace %s', name);
+  this.server.checkNamespace(name, query, (dynamicNsp) => {
+    if (dynamicNsp) {
+      debug('dynamic namespace %s was created', dynamicNsp.name);
       this.doConnect(name, query);
     } else {
       debug('creation of namespace %s was denied', name);
diff --git a/lib/index.js b/lib/index.js
index 016353966f..388fecd4c0 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -1,3 +1,4 @@
+'use strict';
 
 /**
  * Module dependencies.
@@ -12,6 +13,7 @@ var clientVersion = require('socket.io-client/package.json').version;
 var Client = require('./client');
 var Emitter = require('events').EventEmitter;
 var Namespace = require('./namespace');
+var ParentNamespace = require('./parent-namespace');
 var Adapter = require('socket.io-adapter');
 var parser = require('socket.io-parser');
 var debug = require('debug')('socket.io:server');
@@ -46,7 +48,7 @@ function Server(srv, opts){
   }
   opts = opts || {};
   this.nsps = {};
-  this.nspValidators = [];
+  this.parentNsps = new Map();
   this.path(opts.path || '/socket.io');
   this.serveClient(false !== opts.serveClient);
   this.parser = opts.parser || parser;
@@ -160,51 +162,35 @@ Server.prototype.set = function(key, val){
   return this;
 };
 
-/**
- * Sets up server middleware to validate incoming namespaces not already created on the server.
- *
- * @return {Server} self
- * @api public
- */
-
-Server.prototype.useNamespaceValidator = function(fn){
-  this.nspValidators.push(fn);
-  return this;
-};
-
 /**
  * Executes the middleware for an incoming namespace not already created on the server.
  *
- * @param name of incomming namespace
- * @param {Function} last fn call in the middleware
+ * @param {String} name name of incoming namespace
+ * @param {Object} query the query parameters
+ * @param {Function} fn callback
  * @api private
  */
 
-Server.prototype.checkNamespace = function(name, fn){
-  var fns = this.nspValidators.slice(0);
-  if (!fns.length) return fn(false);
-
-  var namespaceAllowed = false; // Deny unknown namespaces by default
-
-  function run(i){
-    fns[i](name, function(err, allow){
-      // upon error, short-circuit
-      if (err) return fn(false);
+Server.prototype.checkNamespace = function(name, query, fn){
+  if (this.parentNsps.size === 0) return fn(false);
 
-      // if one piece of middleware explicitly denies namespace, short-circuit
-      if (allow === false) return fn(false);
+  const keysIterator = this.parentNsps.keys();
 
-      namespaceAllowed = namespaceAllowed || allow === true;
-
-      // if no middleware left, summon callback
-      if (!fns[i + 1]) return fn(namespaceAllowed);
-
-      // go on to next
-      run(i + 1);
+  const run = () => {
+    let nextFn = keysIterator.next();
+    if (nextFn.done) {
+      return fn(false);
+    }
+    nextFn.value(name, query, (err, allow) => {
+      if (err || !allow) {
+        run();
+      } else {
+        fn(this.parentNsps.get(nextFn.value).createChild(name));
+      }
     });
-  }
+  };
 
-  run(0);
+  run();
 };
 
 /**
@@ -452,12 +438,24 @@ Server.prototype.onconnection = function(conn){
 /**
  * Looks up a namespace.
  *
- * @param {String} name nsp name
+ * @param {String|RegExp|Function} name nsp name
  * @param {Function} [fn] optional, nsp `connection` ev handler
  * @api public
  */
 
 Server.prototype.of = function(name, fn){
+  if (typeof name === 'function' || name instanceof RegExp) {
+    const parentNsp = new ParentNamespace(this);
+    debug('initializing parent namespace %s', parentNsp.name);
+    if (typeof name === 'function') {
+      this.parentNsps.set(name, parentNsp);
+    } else {
+      this.parentNsps.set((nsp, conn, next) => next(null, name.test(nsp)), parentNsp);
+    }
+    if (fn) parentNsp.on('connect', fn);
+    return parentNsp;
+  }
+
   if (String(name)[0] !== '/') name = '/' + name;
 
   var nsp = this.nsps[name];
diff --git a/lib/parent-namespace.js b/lib/parent-namespace.js
new file mode 100644
index 0000000000..5a2b4fa8e1
--- /dev/null
+++ b/lib/parent-namespace.js
@@ -0,0 +1,39 @@
+'use strict';
+
+const Namespace = require('./namespace');
+
+let count = 0;
+
+class ParentNamespace extends Namespace {
+
+  constructor(server) {
+    super(server, '/_' + (count++));
+    this.children = new Set();
+  }
+
+  initAdapter() {}
+
+  emit() {
+    const args = Array.prototype.slice.call(arguments);
+
+    this.children.forEach(nsp => {
+      nsp.rooms = this.rooms;
+      nsp.flags = this.flags;
+      nsp.emit.apply(nsp, args);
+    });
+    this.rooms = [];
+    this.flags = {};
+  }
+
+  createChild(name) {
+    const namespace = new Namespace(this.server, name);
+    namespace.fns = this.fns.slice(0);
+    this.listeners('connect').forEach(listener => namespace.on('connect', listener));
+    this.listeners('connection').forEach(listener => namespace.on('connection', listener));
+    this.children.add(namespace);
+    this.server.nsps[name] = namespace;
+    return namespace;
+  }
+}
+
+module.exports = ParentNamespace;
diff --git a/test/socket.io.js b/test/socket.io.js
index c5f96dc63e..aec781455e 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -1,3 +1,5 @@
+'use strict';
+
 var http = require('http').Server;
 var io = require('../lib');
 var fs = require('fs');
@@ -890,75 +892,55 @@ describe('socket.io', function(){
       });
     });
 
-    describe('dynamic', function () {
-      it('should allow connections to dynamic namespaces', function(done){
-        var srv = http();
-        var sio = io(srv);
+    describe('dynamic namespaces', function () {
+      it('should allow connections to dynamic namespaces with a regex', function(done){
+        const srv = http();
+        const sio = io(srv);
+        let count = 0;
         srv.listen(function(){
-          var namespace = '/dynamic';
-          var dynamic = client(srv, namespace);
-          sio.useNamespaceValidator(function(nsp, next) {
-            expect(nsp).to.be(namespace);
-            next(null, true);
+          const socket = client(srv, '/dynamic-101');
+          let dynamicNsp = sio.of(/^\/dynamic-\d+$/).on('connect', (socket) => {
+            expect(socket.nsp.name).to.be('/dynamic-101');
+            dynamicNsp.emit('hello', 1, '2', { 3: '4'});
+            if (++count === 4) done();
+          }).use((socket, next) => {
+            next();
+            if (++count === 4) done();
           });
-          dynamic.on('error', function(err) {
+          socket.on('error', function(err) {
             expect().fail();
           });
-          dynamic.on('connect', function() {
-            expect(sio.nsps[namespace]).to.be.a(Namespace);
-            expect(Object.keys(sio.nsps[namespace].sockets).length).to.be(1);
-            done();
+          socket.on('connect', () => {
+            if (++count === 4) done();
+          });
+          socket.on('hello', (a, b, c) => {
+            expect(a).to.eql(1);
+            expect(b).to.eql('2');
+            expect(c).to.eql({ 3: '4' });
+            if (++count === 4) done();
           });
         });
       });
 
-      it('should not allow connections to dynamic namespaces if not supported', function(done){
-        var srv = http();
-        var sio = io(srv);
+      it('should allow connections to dynamic namespaces with a function', function(done){
+        const srv = http();
+        const sio = io(srv);
         srv.listen(function(){
-          var namespace = '/dynamic';
-          sio.useNamespaceValidator(function(nsp, next) {
-            expect(nsp).to.be(namespace);
-            next(null, false);
-          });
-          sio.on('connect', function(socket) {
-            if (socket.nsp.name === namespace) {
-              expect().fail();
-            }
-          });
-
-          var dynamic = client(srv,namespace);
-          dynamic.on('connect', function(){
-            expect().fail();
-          });
-          dynamic.on('error', function(err) {
-            expect(err).to.be("Invalid namespace");
-            done();
-          });
+          const socket = client(srv, '/dynamic-101');
+          sio.of((name, query, next) => next(null, '/dynamic-101' === name));
+          socket.on('connect', done);
         });
       });
 
-      it('should not allow connections to dynamic namespaces if there is an error', function(done){
-        var srv = http();
-        var sio = io(srv);
+      it('should disallow connections when no dynamic namespace matches', function(done){
+        const srv = http();
+        const sio = io(srv);
         srv.listen(function(){
-          var namespace = '/dynamic';
-          sio.useNamespaceValidator(function(nsp, next) {
-            expect(nsp).to.be(namespace);
-            next(new Error(), true);
-          });
-          sio.on('connect', function(socket) {
-            if (socket.nsp.name === namespace) {
-              expect().fail();
-            }
-          });
-
-          var dynamic = client(srv,namespace);
-          dynamic.on('connect', function(){
-            expect().fail();
-          });
-          dynamic.on('error', function(err) {
-            expect(err).to.be("Invalid namespace");
+          const socket = client(srv, '/abc');
+          sio.of(/^\/dynamic-\d+$/);
+          sio.of((name, query, next) => next(null, '/dynamic-101' === name));
+          socket.on('error', (err) => {
+            expect(err).to.be('Invalid namespace');
             done();
           });
         });
@@ -1759,7 +1741,7 @@ describe('socket.io', function(){
         var socket = client(srv, { reconnection: false });
         sio.on('connection', function(s){
           s.conn.on('upgrade', function(){
-            console.log('\033[96mNote: warning expected and normal in test.\033[39m');
+            console.log('\u001b[96mNote: warning expected and normal in test.\u001b[39m');
             socket.io.engine.write('5woooot');
             setTimeout(function(){
               done();
@@ -1776,7 +1758,7 @@ describe('socket.io', function(){
         var socket = client(srv, { reconnection: false });
         sio.on('connection', function(s){
           s.conn.on('upgrade', function(){
-            console.log('\033[96mNote: warning expected and normal in test.\033[39m');
+            console.log('\u001b[96mNote: warning expected and normal in test.\u001b[39m');
             socket.io.engine.write('44["handle me please"]');
             setTimeout(function(){
               done();

From db831a3de4528a2017dad5e9b419333d4d929bd3 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Thu, 29 Mar 2018 23:30:03 +0200
Subject: [PATCH 26/59] [chore] Release 2.1.0

---
 package.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index 6e88b231b5..33d126aa7e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "socket.io",
-  "version": "2.0.4",
+  "version": "2.1.0",
   "description": "node.js realtime framework server",
   "keywords": [
     "realtime",
@@ -28,7 +28,7 @@
     "engine.io": "~3.2.0",
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
-    "socket.io-client": "socketio/socket.io-client",
+    "socket.io-client": "2.1.0",
     "socket.io-parser": "~3.2.0"
   },
   "devDependencies": {

From 2917942b3e140ad9655e02f64c805df2103af7e8 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Fri, 27 Apr 2018 12:50:31 +0200
Subject: [PATCH 27/59] [docs] Clarify private messaging in the emit cheatsheet
 (#3232)

The previous version was confusing, as `socket.to(socket.id).emit()` does nothing.

Fixes #3220
---
 docs/emit.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/emit.md b/docs/emit.md
index 86996680f2..1ff0195fe2 100644
--- a/docs/emit.md
+++ b/docs/emit.md
@@ -29,7 +29,7 @@ function onConnect(socket){
   io.of('myNamespace').to('room').emit('event', 'message');
 
   // sending to individual socketid (private message)
-  socket.to(<socketid>).emit('hey', 'I just met you');
+  io.to(<socketid>).emit('hey', 'I just met you');
 
   // sending with acknowledgement
   socket.emit('question', 'do you think so?', function (answer) {});

From 0279c47c8c886039093e0086c917575bbf419866 Mon Sep 17 00:00:00 2001
From: Donut <donut@thonk.club>
Date: Fri, 27 Apr 2018 12:00:27 +0100
Subject: [PATCH 28/59] [docs] Convert the chat example to ES6 (#3227)

---
 examples/chat/index.js       | 14 ++++-----
 examples/chat/public/main.js | 56 ++++++++++++++++++------------------
 2 files changed, 35 insertions(+), 35 deletions(-)

diff --git a/examples/chat/index.js b/examples/chat/index.js
index a1355285c9..04b5b9d926 100644
--- a/examples/chat/index.js
+++ b/examples/chat/index.js
@@ -6,7 +6,7 @@ var server = require('http').createServer(app);
 var io = require('../..')(server);
 var port = process.env.PORT || 3000;
 
-server.listen(port, function () {
+server.listen(port, () => {
   console.log('Server listening at port %d', port);
 });
 
@@ -17,11 +17,11 @@ app.use(express.static(path.join(__dirname, 'public')));
 
 var numUsers = 0;
 
-io.on('connection', function (socket) {
+io.on('connection', (socket) => {
   var addedUser = false;
 
   // when the client emits 'new message', this listens and executes
-  socket.on('new message', function (data) {
+  socket.on('new message', (data) => {
     // we tell the client to execute 'new message'
     socket.broadcast.emit('new message', {
       username: socket.username,
@@ -30,7 +30,7 @@ io.on('connection', function (socket) {
   });
 
   // when the client emits 'add user', this listens and executes
-  socket.on('add user', function (username) {
+  socket.on('add user', (username) => {
     if (addedUser) return;
 
     // we store the username in the socket session for this client
@@ -48,21 +48,21 @@ io.on('connection', function (socket) {
   });
 
   // when the client emits 'typing', we broadcast it to others
-  socket.on('typing', function () {
+  socket.on('typing', () => {
     socket.broadcast.emit('typing', {
       username: socket.username
     });
   });
 
   // when the client emits 'stop typing', we broadcast it to others
-  socket.on('stop typing', function () {
+  socket.on('stop typing', () => {
     socket.broadcast.emit('stop typing', {
       username: socket.username
     });
   });
 
   // when the user disconnects.. perform this
-  socket.on('disconnect', function () {
+  socket.on('disconnect', () => {
     if (addedUser) {
       --numUsers;
 
diff --git a/examples/chat/public/main.js b/examples/chat/public/main.js
index 83d142825a..5af5b89f8c 100644
--- a/examples/chat/public/main.js
+++ b/examples/chat/public/main.js
@@ -25,7 +25,7 @@ $(function() {
 
   var socket = io();
 
-  function addParticipantsMessage (data) {
+  const addParticipantsMessage = (data) => {
     var message = '';
     if (data.numUsers === 1) {
       message += "there's 1 participant";
@@ -36,7 +36,7 @@ $(function() {
   }
 
   // Sets the client's username
-  function setUsername () {
+  const setUsername = () => {
     username = cleanInput($usernameInput.val().trim());
 
     // If the username is valid
@@ -52,7 +52,7 @@ $(function() {
   }
 
   // Sends a chat message
-  function sendMessage () {
+  const sendMessage = () => {
     var message = $inputMessage.val();
     // Prevent markup from being injected into the message
     message = cleanInput(message);
@@ -69,13 +69,13 @@ $(function() {
   }
 
   // Log a message
-  function log (message, options) {
+    const log = (message, options) => {
     var $el = $('<li>').addClass('log').text(message);
     addMessageElement($el, options);
   }
 
   // Adds the visual chat message to the message list
-  function addChatMessage (data, options) {
+  const addChatMessage = (data, options) => {
     // Don't fade the message in if there is an 'X was typing'
     var $typingMessages = getTypingMessages(data);
     options = options || {};
@@ -100,15 +100,15 @@ $(function() {
   }
 
   // Adds the visual chat typing message
-  function addChatTyping (data) {
+  const addChatTyping = (data) => {
     data.typing = true;
     data.message = 'is typing';
     addChatMessage(data);
   }
 
   // Removes the visual chat typing message
-  function removeChatTyping (data) {
-    getTypingMessages(data).fadeOut(function () {
+  const removeChatTyping = (data) => {
+    getTypingMessages(data).fadeOut(() => {
       $(this).remove();
     });
   }
@@ -118,7 +118,7 @@ $(function() {
   // options.fade - If the element should fade-in (default = true)
   // options.prepend - If the element should prepend
   //   all other messages (default = false)
-  function addMessageElement (el, options) {
+  const addMessageElement = (el, options) => {
     var $el = $(el);
 
     // Setup default options
@@ -145,12 +145,12 @@ $(function() {
   }
 
   // Prevents input from having injected markup
-  function cleanInput (input) {
+  const cleanInput = (input) => {
     return $('<div/>').text(input).html();
   }
 
   // Updates the typing event
-  function updateTyping () {
+  const updateTyping = () => {
     if (connected) {
       if (!typing) {
         typing = true;
@@ -158,7 +158,7 @@ $(function() {
       }
       lastTypingTime = (new Date()).getTime();
 
-      setTimeout(function () {
+      setTimeout(() => {
         var typingTimer = (new Date()).getTime();
         var timeDiff = typingTimer - lastTypingTime;
         if (timeDiff >= TYPING_TIMER_LENGTH && typing) {
@@ -170,14 +170,14 @@ $(function() {
   }
 
   // Gets the 'X is typing' messages of a user
-  function getTypingMessages (data) {
-    return $('.typing.message').filter(function (i) {
+  const getTypingMessages = (data) => {
+    return $('.typing.message').filter(i => {
       return $(this).data('username') === data.username;
     });
   }
 
   // Gets the color of a username through our hash function
-  function getUsernameColor (username) {
+  const getUsernameColor = (username) => {
     // Compute hash code
     var hash = 7;
     for (var i = 0; i < username.length; i++) {
@@ -190,7 +190,7 @@ $(function() {
 
   // Keyboard events
 
-  $window.keydown(function (event) {
+  $window.keydown(event => {
     // Auto-focus the current input when a key is typed
     if (!(event.ctrlKey || event.metaKey || event.altKey)) {
       $currentInput.focus();
@@ -207,26 +207,26 @@ $(function() {
     }
   });
 
-  $inputMessage.on('input', function() {
+  $inputMessage.on('input', () => {
     updateTyping();
   });
 
   // Click events
 
   // Focus input when clicking anywhere on login page
-  $loginPage.click(function () {
+  $loginPage.click(() => {
     $currentInput.focus();
   });
 
   // Focus input when clicking on the message input's border
-  $inputMessage.click(function () {
+  $inputMessage.click(() => {
     $inputMessage.focus();
   });
 
   // Socket events
 
   // Whenever the server emits 'login', log the login message
-  socket.on('login', function (data) {
+  socket.on('login', (data) => {
     connected = true;
     // Display the welcome message
     var message = "Welcome to Socket.IO Chat – ";
@@ -237,45 +237,45 @@ $(function() {
   });
 
   // Whenever the server emits 'new message', update the chat body
-  socket.on('new message', function (data) {
+  socket.on('new message', (data) => {
     addChatMessage(data);
   });
 
   // Whenever the server emits 'user joined', log it in the chat body
-  socket.on('user joined', function (data) {
+  socket.on('user joined', (data) => {
     log(data.username + ' joined');
     addParticipantsMessage(data);
   });
 
   // Whenever the server emits 'user left', log it in the chat body
-  socket.on('user left', function (data) {
+  socket.on('user left', (data) => {
     log(data.username + ' left');
     addParticipantsMessage(data);
     removeChatTyping(data);
   });
 
   // Whenever the server emits 'typing', show the typing message
-  socket.on('typing', function (data) {
+  socket.on('typing', (data) => {
     addChatTyping(data);
   });
 
   // Whenever the server emits 'stop typing', kill the typing message
-  socket.on('stop typing', function (data) {
+  socket.on('stop typing', (data) => {
     removeChatTyping(data);
   });
 
-  socket.on('disconnect', function () {
+  socket.on('disconnect', () => {
     log('you have been disconnected');
   });
 
-  socket.on('reconnect', function () {
+  socket.on('reconnect', () => {
     log('you have been reconnected');
     if (username) {
       socket.emit('add user', username);
     }
   });
 
-  socket.on('reconnect_error', function () {
+  socket.on('reconnect_error', () => {
     log('attempt to reconnect has failed');
   });
 

From 1decae341c80c0417b32d3124ca30c005240b48a Mon Sep 17 00:00:00 2001
From: Sleiman Sleiman <sleiman@outlook.com>
Date: Fri, 27 Apr 2018 14:03:25 +0300
Subject: [PATCH 29/59] [feat] Add local flag to the socket object (#3219)

To match the behaviour on the namespace (see #2628).
---
 lib/socket.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/socket.js b/lib/socket.js
index 6cf9b52864..9a96929728 100644
--- a/lib/socket.js
+++ b/lib/socket.js
@@ -39,7 +39,8 @@ exports.events = [
 var flags = [
   'json',
   'volatile',
-  'broadcast'
+  'broadcast',
+  'local'
 ];
 
 /**

From e0b2cb0c5a9af768a48c43f65643412cc8edc7df Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Thu, 17 May 2018 23:22:49 +0200
Subject: [PATCH 30/59] [chore] Release 2.1.1

---
 package.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index 33d126aa7e..6a13e2d152 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "socket.io",
-  "version": "2.1.0",
+  "version": "2.1.1",
   "description": "node.js realtime framework server",
   "keywords": [
     "realtime",
@@ -28,7 +28,7 @@
     "engine.io": "~3.2.0",
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
-    "socket.io-client": "2.1.0",
+    "socket.io-client": "2.1.1",
     "socket.io-parser": "~3.2.0"
   },
   "devDependencies": {

From d97d873aee19ef1d7d3932281817679b578ea4f9 Mon Sep 17 00:00:00 2001
From: Andrew Stelmach <Yorkshireman@users.noreply.github.com>
Date: Sat, 18 Aug 2018 22:32:07 +0100
Subject: [PATCH 31/59] [docs] update README.md (#3309)

---
 Readme.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Readme.md b/Readme.md
index 4d0c89ad1d..4f306c4e03 100644
--- a/Readme.md
+++ b/Readme.md
@@ -11,7 +11,7 @@
 
 ## Features
 
-Socket.IO enables real-time bidirectional event-based communication. It consists in:
+Socket.IO enables real-time bidirectional event-based communication. It consists of:
 
 - a Node.js server (this repository)
 - a [Javascript client library](https://github.com/socketio/socket.io-client) for the browser (or a Node.js client)

From 2dbec77a385a7be6c6434f2db3dc10d721da493d Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Tue, 21 Aug 2018 13:21:14 +0200
Subject: [PATCH 32/59] [chore] Update issue template

---
 .github/ISSUE_TEMPLATE.md | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
index 9d0b1cd927..03303efc53 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -1,5 +1,9 @@
 
-*Note*: for support questions, please use one of these channels: [stackoverflow](http://stackoverflow.com/questions/tagged/socket.io) or [slack](https://socketio.slack.com)
+**Note**: for support questions, please use one of these channels: [stackoverflow](http://stackoverflow.com/questions/tagged/socket.io) or [slack](https://socketio.slack.com)
+
+For bug reports and feature requests for the **Swift client**, please open an issue [there](https://github.com/socketio/socket.io-client-swift).
+
+For bug reports and feature requests for the **Java client**, please open an issue [there](https://github.com/socketio/socket.io-client-java).
 
 ### You want to:
 
@@ -8,13 +12,15 @@
 
 ### Current behaviour
 
+*What is actually happening?*
 
 ### Steps to reproduce (if the current behaviour is a bug)
 
-**Note**: the best way to get a quick answer is to provide a failing test case, by forking the following [fiddle](https://github.com/darrachequesne/socket.io-fiddle) for example.
+**Note**: the best way (and by that we mean **the only way**) to get a quick answer is to provide a failing test case by forking the following [fiddle](https://github.com/socketio/socket.io-fiddle).
 
 ### Expected behaviour
 
+*What is expected?*
 
 ### Setup
 - OS:

From 7e35f901b8b60605b6cde94467033921ab582fc5 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Tue, 28 Aug 2018 09:02:35 +0200
Subject: [PATCH 33/59] [docs] fix `this` scope in the chat example

`user is typing` messages were not properly removed

Closes #3291
---
 examples/chat/public/main.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/examples/chat/public/main.js b/examples/chat/public/main.js
index 5af5b89f8c..f20614a89a 100644
--- a/examples/chat/public/main.js
+++ b/examples/chat/public/main.js
@@ -108,7 +108,7 @@ $(function() {
 
   // Removes the visual chat typing message
   const removeChatTyping = (data) => {
-    getTypingMessages(data).fadeOut(() => {
+    getTypingMessages(data).fadeOut(function () {
       $(this).remove();
     });
   }
@@ -171,7 +171,7 @@ $(function() {
 
   // Gets the 'X is typing' messages of a user
   const getTypingMessages = (data) => {
-    return $('.typing.message').filter(i => {
+    return $('.typing.message').filter(function (i) {
       return $(this).data('username') === data.username;
     });
   }

From e5f0ceaee060306c38c7a5abf470f693b609a17d Mon Sep 17 00:00:00 2001
From: Emmanuel DEMEY <demey.emmanuel@gmail.com>
Date: Thu, 8 Nov 2018 00:26:54 +0100
Subject: [PATCH 34/59] [docs] Use new JavaScript syntax inside the README
 (#3360)

---
 Readme.md | 40 ++++++++++++++++++++--------------------
 1 file changed, 20 insertions(+), 20 deletions(-)

diff --git a/Readme.md b/Readme.md
index 4f306c4e03..88e8b3aa52 100644
--- a/Readme.md
+++ b/Readme.md
@@ -55,10 +55,10 @@ Any serializable data structures can be emitted, including:
 Sample code:
 
 ```js
-io.on('connection', function(socket){
-  socket.emit('request', /* */); // emit an event to the socket
-  io.emit('broadcast', /* */); // emit an event to all connected sockets
-  socket.on('reply', function(){ /* */ }); // listen to the event
+io.on('connection', socket => {
+  socket.emit('request', /* … */); // emit an event to the socket
+  io.emit('broadcast', /* … */); // emit an event to all connected sockets
+  socket.on('reply', () => { /* … */ }); // listen to the event
 });
 ```
 
@@ -84,7 +84,7 @@ This is a useful feature to send notifications to a group of users, or to a give
 ## Installation
 
 ```bash
-npm install socket.io --save
+npm install socket.io
 ```
 
 ## How to use
@@ -93,11 +93,11 @@ The following example attaches socket.io to a plain Node.JS
 HTTP server listening on port `3000`.
 
 ```js
-var server = require('http').createServer();
-var io = require('socket.io')(server);
-io.on('connection', function(client){
-  client.on('event', function(data){});
-  client.on('disconnect', function(){});
+const server = require('http').createServer();
+const io = require('socket.io')(server);
+io.on('connection', client => {
+  client.on('event', data => { /* … */ });
+  client.on('disconnect', () => { /* … */ });
 });
 server.listen(3000);
 ```
@@ -105,8 +105,8 @@ server.listen(3000);
 ### Standalone
 
 ```js
-var io = require('socket.io')();
-io.on('connection', function(client){});
+const io = require('socket.io')();
+io.on('connection', client => { ... });
 io.listen(3000);
 ```
 
@@ -118,10 +118,10 @@ to pass the `Server` to `socket.io`, and not the express application
 function. Also make sure to call `.listen` on the `server`, not the `app`.
 
 ```js
-var app = require('express')();
-var server = require('http').createServer(app);
-var io = require('socket.io')(server);
-io.on('connection', function(){ /* … */ });
+const app = require('express')();
+const server = require('http').createServer(app);
+const io = require('socket.io')(server);
+io.on('connection', () => { /* … */ });
 server.listen(3000);
 ```
 
@@ -131,10 +131,10 @@ Like Express.JS, Koa works by exposing an application as a request
 handler function, but only by calling the `callback` method.
 
 ```js
-var app = require('koa')();
-var server = require('http').createServer(app.callback());
-var io = require('socket.io')(server);
-io.on('connection', function(){ /* … */ });
+const app = require('koa')();
+const server = require('http').createServer(app.callback());
+const io = require('socket.io')(server);
+io.on('connection', () => { /* … */ });
 server.listen(3000);
 ```
 

From 7b8fba7ea2a632323baaf8e5d1e543a1f92e2b3d Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Tue, 20 Nov 2018 07:32:39 +0100
Subject: [PATCH 35/59] [test] Update Travis configuration

Reference: https://github.com/nodejs/Release
---
 .travis.yml | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index aa2c7cee84..d50f26c43b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,8 @@
 language: node_js
 sudo: false
 node_js:
-  - '4'
-  - '6'
   - '8'
-  - node
+  - '10'
 notifications:
   irc: "irc.freenode.org#socket.io"
 git:

From 190d22b46e3c2ed18413458a2106322f8bac99f5 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Tue, 20 Nov 2018 07:24:56 +0100
Subject: [PATCH 36/59] [chore] Bump dependencies

- engine.io: https://github.com/socketio/engine.io/compare/3.2.0...3.3.1
- socket.io-parser: https://github.com/socketio/socket.io-parser/compare/3.2.0..3.3.0
---
 package.json | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/package.json b/package.json
index 6a13e2d152..77599d3ce1 100644
--- a/package.json
+++ b/package.json
@@ -24,12 +24,12 @@
     "test": "nyc mocha --reporter spec --slow 200 --bail --timeout 10000 test/socket.io.js"
   },
   "dependencies": {
-    "debug": "~3.1.0",
-    "engine.io": "~3.2.0",
+    "debug": "~4.1.0",
+    "engine.io": "~3.3.1",
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
-    "socket.io-client": "2.1.1",
-    "socket.io-parser": "~3.2.0"
+    "socket.io-client": "https://github.com/socketio/socket.io-client.git#develop",
+    "socket.io-parser": "~3.3.0"
   },
   "devDependencies": {
     "expect.js": "0.3.1",

From a7fbd1ac4a47cafd832fc62e371754df924c5903 Mon Sep 17 00:00:00 2001
From: Antonio <antonio.root@gmail.com>
Date: Tue, 20 Nov 2018 07:40:11 +0100
Subject: [PATCH 37/59] [fix] Throw an error when trying to access the clients
 of a dynamic namespace (#3355)

Accessing the clients of a dynamic namespace throws because doing `io.of(/your-regex/g)` returns a namespace with no adapter and the clients methods tries to access `namespace.adapter.clients`.
---
 lib/namespace.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/namespace.js b/lib/namespace.js
index 6d0ac17065..bca8a3e99f 100644
--- a/lib/namespace.js
+++ b/lib/namespace.js
@@ -262,6 +262,9 @@ Namespace.prototype.write = function(){
  */
 
 Namespace.prototype.clients = function(fn){
+  if(!this.adapter){
+    throw new Error('No adapter for this namespace, are you trying to get the list of clients of a dynamic namespace?')
+  }
   this.adapter.clients(this.rooms, fn);
   // reset rooms for scenario:
   // .in('room').clients() (GH-1978)

From d3c653d876d90f28d6bd9b367b7ce71b8f7399ad Mon Sep 17 00:00:00 2001
From: Nadir Hussain Laskar <nadirlaskar@gmail.com>
Date: Tue, 20 Nov 2018 12:31:09 +0530
Subject: [PATCH 38/59] [docs] Add Touch Support to the whiteboard example
 (#3104)

---
 examples/whiteboard/public/main.js | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/examples/whiteboard/public/main.js b/examples/whiteboard/public/main.js
index 808f52b223..03ea033469 100644
--- a/examples/whiteboard/public/main.js
+++ b/examples/whiteboard/public/main.js
@@ -16,6 +16,12 @@
   canvas.addEventListener('mouseup', onMouseUp, false);
   canvas.addEventListener('mouseout', onMouseUp, false);
   canvas.addEventListener('mousemove', throttle(onMouseMove, 10), false);
+  
+  //Touch support for mobile devices
+  canvas.addEventListener('touchstart', onMouseDown, false);
+  canvas.addEventListener('touchend', onMouseUp, false);
+  canvas.addEventListener('touchcancel', onMouseUp, false);
+  canvas.addEventListener('touchmove', throttle(onMouseMove, 10), false);
 
   for (var i = 0; i < colors.length; i++){
     colors[i].addEventListener('click', onColorUpdate, false);
@@ -51,21 +57,21 @@
 
   function onMouseDown(e){
     drawing = true;
-    current.x = e.clientX;
-    current.y = e.clientY;
+    current.x = e.clientX||e.touches[0].clientX;
+    current.y = e.clientY||e.touches[0].clientY;
   }
 
   function onMouseUp(e){
     if (!drawing) { return; }
     drawing = false;
-    drawLine(current.x, current.y, e.clientX, e.clientY, current.color, true);
+    drawLine(current.x, current.y, e.clientX||e.touches[0].clientX, e.clientY||e.touches[0].clientY, current.color, true);
   }
 
   function onMouseMove(e){
     if (!drawing) { return; }
-    drawLine(current.x, current.y, e.clientX, e.clientY, current.color, true);
-    current.x = e.clientX;
-    current.y = e.clientY;
+    drawLine(current.x, current.y, e.clientX||e.touches[0].clientX, e.clientY||e.touches[0].clientY, current.color, true);
+    current.x = e.clientX||e.touches[0].clientX;
+    current.y = e.clientY||e.touches[0].clientY;
   }
 
   function onColorUpdate(e){

From b00ae50be65d1bc88fa95145f1c486a6886a6b76 Mon Sep 17 00:00:00 2001
From: Markko Legonkov <maxlego@gmail.com>
Date: Tue, 20 Nov 2018 09:02:04 +0200
Subject: [PATCH 39/59] [feat] Add cache-control header when serving the client
 source (#2907)

---
 lib/index.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/index.js b/lib/index.js
index 388fecd4c0..5287e4ead0 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -370,6 +370,7 @@ Server.prototype.serve = function(req, res){
   }
 
   debug('serve client source');
+  res.setHeader("Cache-Control", "public, max-age=0");
   res.setHeader('Content-Type', 'application/javascript');
   res.setHeader('ETag', expectedEtag);
   res.writeHead(200);

From df05b73bb93d7c34c758504001f869cb156703d5 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Thu, 29 Nov 2018 00:00:45 +0100
Subject: [PATCH 40/59] [chore] Release 2.2.0

---
 package.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index 77599d3ce1..420324740b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "socket.io",
-  "version": "2.1.1",
+  "version": "2.2.0",
   "description": "node.js realtime framework server",
   "keywords": [
     "realtime",
@@ -28,7 +28,7 @@
     "engine.io": "~3.3.1",
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
-    "socket.io-client": "https://github.com/socketio/socket.io-client.git#develop",
+    "socket.io-client": "2.2.0",
     "socket.io-parser": "~3.3.0"
   },
   "devDependencies": {

From 9c1e73c752aec63f48b511330a506d037783d897 Mon Sep 17 00:00:00 2001
From: Grant Timmerman <granttimmerman@gmail.com>
Date: Fri, 15 Mar 2019 14:22:22 -0700
Subject: [PATCH 41/59] =?UTF-8?q?[chore]=C2=A0Update=20the=20license=20of?=
 =?UTF-8?q?=20the=20chat=20example=20(#3410)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

There was no obvious reason to use BSD instead of MIT for that very basic chat app.

Closes #3411
---
 examples/cluster-nginx/server/package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/cluster-nginx/server/package.json b/examples/cluster-nginx/server/package.json
index 0fe83ecd3e..a72f945e6a 100644
--- a/examples/cluster-nginx/server/package.json
+++ b/examples/cluster-nginx/server/package.json
@@ -5,7 +5,7 @@
   "main": "index.js",
   "author": "Grant Timmerman",
   "private": true,
-  "license": "BSD",
+  "license": "MIT",
   "dependencies": {
     "express": "4.13.4",
     "socket.io": "^1.7.2",

From 1150eb50e9ce4f15cbd86c51de69df82f3194206 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Fri, 20 Sep 2019 10:31:25 +0200
Subject: [PATCH 42/59] [chore] Bump engine.io to version 3.4.0

Diff: https://github.com/socketio/engine.io/compare/3.3.1...3.4.0
---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 420324740b..8d33fd7b66 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   },
   "dependencies": {
     "debug": "~4.1.0",
-    "engine.io": "~3.3.1",
+    "engine.io": "~3.4.0",
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
     "socket.io-client": "2.2.0",

From 82271921db9d5d2048322a0c9466ffcb09b2a501 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonatan=20Ju=C3=A1rez?= <jonatan.ijp@gmail.com>
Date: Fri, 20 Sep 2019 03:37:54 -0500
Subject: [PATCH 43/59] [docs] Fix the default value of the 'origins' parameter
 (#3464)

Fix documentation about default origins value. The default should read `*:*` instead of `*
---
 docs/API.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/API.md b/docs/API.md
index 80d184017a..ad4c6c7547 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -78,7 +78,7 @@ Exposed by `require('socket.io')`.
     - `path` _(String)_: name of the path to capture (`/socket.io`)
     - `serveClient` _(Boolean)_: whether to serve the client files (`true`)
     - `adapter` _(Adapter)_: the adapter to use. Defaults to an instance of the `Adapter` that ships with socket.io which is memory based. See [socket.io-adapter](https://github.com/socketio/socket.io-adapter)
-    - `origins` _(String)_: the allowed origins (`*`)
+    - `origins` _(String)_: the allowed origins (`*:*`)
     - `parser` _(Parser)_: the parser to use. Defaults to an instance of the `Parser` that ships with socket.io. See [socket.io-parser](https://github.com/socketio/socket.io-parser).
 
 Works with and without `new`:

From 4d01b2c84cc8dcd6968e422d44cb5e78851058b9 Mon Sep 17 00:00:00 2001
From: flaambe <flaambe@gmail.com>
Date: Fri, 20 Sep 2019 13:50:12 +0500
Subject: [PATCH 44/59] test: remove deprecated Buffer usage (#3481)

---
 docs/API.md                           |  2 +-
 examples/custom-parsers/README.md     |  2 +-
 examples/custom-parsers/src/server.js |  2 +-
 test/socket.io.js                     | 22 +++++++++++-----------
 4 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/docs/API.md b/docs/API.md
index ad4c6c7547..a7ee580fc9 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -635,7 +635,7 @@ Emits an event to the socket identified by the string name. Any other parameters
 
 ```js
 socket.emit('hello', 'world');
-socket.emit('with-binary', 1, '2', { 3: '4', 5: new Buffer(6) });
+socket.emit('with-binary', 1, '2', { 3: '4', 5: Buffer.alloc(6) });
 ```
 
 The `ack` argument is optional and will be called with the client's answer.
diff --git a/examples/custom-parsers/README.md b/examples/custom-parsers/README.md
index be00e9f3b8..519815d8fe 100644
--- a/examples/custom-parsers/README.md
+++ b/examples/custom-parsers/README.md
@@ -14,7 +14,7 @@ They are tested with various payloads:
 
 - string: `['1', '2', ... '1000']`
 - numeric: `[1, 2, ... 1000]`
-- binary: `new Buffer(1000), where buf[i] = i`
+- binary: `Buffer.allocUnsafe(1000), where buf[i] = i`
 
 ## How to use
 
diff --git a/examples/custom-parsers/src/server.js b/examples/custom-parsers/src/server.js
index 3b20d1703d..c222177af9 100644
--- a/examples/custom-parsers/src/server.js
+++ b/examples/custom-parsers/src/server.js
@@ -27,7 +27,7 @@ let server4 = io(3004, {
 
 let string = [];
 let numeric = [];
-let binary = new Buffer(1e3);
+let binary = Buffer.allocUnsafe(1e3);
 for (var i = 0; i < 1e3; i++) {
   string.push('' + i);
   numeric.push(i);
diff --git a/test/socket.io.js b/test/socket.io.js
index aec781455e..337f2ebd4a 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -23,7 +23,7 @@ function client(srv, nsp, opts){
 
 describe('socket.io', function(){
 
-  it('should be the same version as client', function(){
+  it.skip('should be the same version as client', function(){
     var version = require('../package').version;
     expect(version).to.be(require('socket.io-client/package').version);
   });
@@ -1126,7 +1126,7 @@ describe('socket.io', function(){
         sio.on('connection', function(s){
           fs.readFile(join(__dirname, 'support', 'doge.jpg'), function(err, data){
             if (err) return done(err);
-            var buf = new Buffer('asdfasdf', 'utf8');
+            var buf = Buffer.from('asdfasdf', 'utf8');
             s.emit('multiple', 1, data, '3', [4], buf, [data, 'swag', buf]);
           });
         });
@@ -1143,7 +1143,7 @@ describe('socket.io', function(){
             expect(Buffer.isBuffer(a)).to.be(true);
             done();
           });
-          var buf = new Buffer('abcdefg', 'utf8');
+          var buf = Buffer.from('abcdefg', 'utf8');
           socket.emit('buff', buf);
         });
       });
@@ -1168,7 +1168,7 @@ describe('socket.io', function(){
           });
           fs.readFile(join(__dirname, 'support', 'doge.jpg'), function(err, data){
             if (err) return done(err);
-            var buf = new Buffer('asdfasdf', 'utf8');
+            var buf = Buffer.from('asdfasdf', 'utf8');
             socket.emit('multiple', 1, data, '3', [4], buf, [data, 'swag', buf]);
           });
         });
@@ -1496,7 +1496,7 @@ describe('socket.io', function(){
             expect(Buffer.isBuffer(buf)).to.be(true);
             fn(1, 2);
           });
-          socket.emit('woot', new Buffer(3), function(a, b){
+          socket.emit('woot', Buffer.alloc(3), function(a, b){
             expect(a).to.be(1);
             expect(b).to.be(2);
             done();
@@ -1515,7 +1515,7 @@ describe('socket.io', function(){
             expect(Buffer.isBuffer(a)).to.be(true);
             fn();
           });
-          s.emit('hi', new Buffer(4), function(){
+          s.emit('hi', Buffer.alloc(4), function(){
             done();
           });
         });
@@ -1529,7 +1529,7 @@ describe('socket.io', function(){
         var socket = client(srv);
         sio.on('connection', function(s){
           socket.on('hi', function(fn){
-            fn(new Buffer(1));
+            fn(Buffer.alloc(1));
           });
           s.emit('hi', function(a){
             expect(Buffer.isBuffer(a)).to.be(true);
@@ -1546,7 +1546,7 @@ describe('socket.io', function(){
         var socket = client(srv);
         sio.on('connection', function(s){
           s.on('woot', function(fn){
-            fn(new Buffer(2));
+            fn(Buffer.alloc(2));
           });
           socket.emit('woot', function(a){
             expect(Buffer.isBuffer(a)).to.be(true);
@@ -1899,7 +1899,7 @@ describe('socket.io', function(){
         });
 
         function emit(){
-          sio.emit('bin', new Buffer(10));
+          sio.emit('bin', Buffer.alloc(10));
         }
       });
     });
@@ -2083,8 +2083,8 @@ describe('socket.io', function(){
             socket.join(room, fn);
           });
           socket.on('broadcast', function(){
-            socket.broadcast.to('test').emit('bin', new Buffer(5));
-            socket.emit('bin2', new Buffer(5));
+            socket.broadcast.to('test').emit('bin', Buffer.alloc(5));
+            socket.emit('bin2', Buffer.alloc(5));
           });
         });
       });

From cf39362014f5ff13a17168b74772c43920d6e4fd Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Fri, 20 Sep 2019 11:04:11 +0200
Subject: [PATCH 45/59] [chore] Bump socket.io-parser to version 3.4.0

Diff: https://github.com/socketio/socket.io-parser/compare/3.3.0...3.4.0
---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 8d33fd7b66..ae189fe9bf 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
     "socket.io-client": "2.2.0",
-    "socket.io-parser": "~3.3.0"
+    "socket.io-parser": "~3.4.0"
   },
   "devDependencies": {
     "expect.js": "0.3.1",

From 47161a65d40c2587535de750ac4c7d448e5842ba Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Fri, 20 Sep 2019 12:18:39 +0200
Subject: [PATCH 46/59] [chore] Release 2.3.0

Diff: https://github.com/socketio/socket.io/compare/2.2.0...2.3.0
---
 package.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index ae189fe9bf..3d648fec14 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "socket.io",
-  "version": "2.2.0",
+  "version": "2.3.0",
   "description": "node.js realtime framework server",
   "keywords": [
     "realtime",
@@ -28,7 +28,7 @@
     "engine.io": "~3.4.0",
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
-    "socket.io-client": "2.2.0",
+    "socket.io-client": "2.3.0",
     "socket.io-parser": "~3.4.0"
   },
   "devDependencies": {

From 6fa026fc94fb3a1e6674b8a2c1211b24ee38934a Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Mon, 7 Dec 2020 11:37:03 +0100
Subject: [PATCH 47/59] ci: migrate to GitHub Actions

Due to the recent changes to the Travis CI platform (see [1]), we will
now use GitHub Actions to run the tests.

Reference: https://docs.github.com/en/free-pro-team@latest/actions/guides/building-and-testing-nodejs

[1]: https://blog.travis-ci.com/2020-11-02-travis-ci-new-billing
---
 .github/workflows/ci.yml |   24 +
 .travis.yml              |   12 -
 Readme.md                |    2 +-
 package-lock.json        | 3409 ++++++++++++++++++++++++++++++++++++++
 4 files changed, 3434 insertions(+), 13 deletions(-)
 create mode 100644 .github/workflows/ci.yml
 delete mode 100644 .travis.yml
 create mode 100644 package-lock.json

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000000..e225759ce4
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,24 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test-node:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 14.x]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm ci
+      - run: npm test
+        env:
+          CI: true
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index d50f26c43b..0000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,12 +0,0 @@
-language: node_js
-sudo: false
-node_js:
-  - '8'
-  - '10'
-notifications:
-  irc: "irc.freenode.org#socket.io"
-git:
-  depth: 1
-cache:
-  directories:
-    - node_modules
diff --git a/Readme.md b/Readme.md
index 88e8b3aa52..92fc1c53bf 100644
--- a/Readme.md
+++ b/Readme.md
@@ -2,7 +2,7 @@
 # socket.io
 
 [![Backers on Open Collective](https://opencollective.com/socketio/backers/badge.svg)](#backers) [![Sponsors on Open Collective](https://opencollective.com/socketio/sponsors/badge.svg)](#sponsors)
-[![Build Status](https://secure.travis-ci.org/socketio/socket.io.svg?branch=master)](https://travis-ci.org/socketio/socket.io)
+[![Build Status](https://github.com/socketio/socket.io/workflows/CI/badge.svg)](https://github.com/socketio/socket.io/actions)
 [![Dependency Status](https://david-dm.org/socketio/socket.io.svg)](https://david-dm.org/socketio/socket.io)
 [![devDependency Status](https://david-dm.org/socketio/socket.io/dev-status.svg)](https://david-dm.org/socketio/socket.io#info=devDependencies)
 [![NPM version](https://badge.fury.io/js/socket.io.svg)](https://www.npmjs.com/package/socket.io)
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000000..6ad0ec1dde
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,3409 @@
+{
+  "name": "socket.io",
+  "version": "2.3.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "accepts": {
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
+    "after": {
+      "version": "0.8.2",
+      "resolved": "https://registry.npmjs.org/after/-/after-0.8.2.tgz",
+      "integrity": "sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8="
+    },
+    "arraybuffer.slice": {
+      "version": "0.0.7",
+      "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz",
+      "integrity": "sha512-wGUIVQXuehL5TCqQun8OW81jGzAWycqzFF8lFp+GOM5BXLYj3bKNsYC4daB7n6XjCqxQA/qgTJ+8ANR3acjrog=="
+    },
+    "async-limiter": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
+      "integrity": "sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ=="
+    },
+    "asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k=",
+      "dev": true
+    },
+    "backo2": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/backo2/-/backo2-1.0.2.tgz",
+      "integrity": "sha1-MasayLEpNjRj41s+u2n038+6eUc="
+    },
+    "balanced-match": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
+      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+      "dev": true
+    },
+    "base64-arraybuffer": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.4.tgz",
+      "integrity": "sha1-mBjHngWbE1X5fgQooBfIOOkLqBI="
+    },
+    "base64id": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/base64id/-/base64id-2.0.0.tgz",
+      "integrity": "sha512-lGe34o6EHj9y3Kts9R4ZYs/Gr+6N7MCaMlIFA3F1R2O5/m7K06AxfSeO5530PEERE6/WyEg3lsuyw4GHlPZHog=="
+    },
+    "better-assert": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/better-assert/-/better-assert-1.0.2.tgz",
+      "integrity": "sha1-QIZrnhueC1W0gYlDEeaPr/rrxSI=",
+      "requires": {
+        "callsite": "1.0.0"
+      }
+    },
+    "blob": {
+      "version": "0.0.5",
+      "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.5.tgz",
+      "integrity": "sha512-gaqbzQPqOoamawKg0LGVd7SzLgXS+JH61oWprSLH+P+abTczqJbhTR8CmJ2u9/bUYNmHTGJx/UEmn6doAvvuig=="
+    },
+    "brace-expansion": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "dev": true,
+      "requires": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "browser-stdout": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.0.tgz",
+      "integrity": "sha1-81HTKWnTL6XXpVZxVCY9korjvR8=",
+      "dev": true
+    },
+    "callsite": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/callsite/-/callsite-1.0.0.tgz",
+      "integrity": "sha1-KAOY5dZkvXQDi28JBRU+borxvCA="
+    },
+    "combined-stream": {
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
+      "dev": true,
+      "requires": {
+        "delayed-stream": "~1.0.0"
+      }
+    },
+    "commander": {
+      "version": "2.9.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.9.0.tgz",
+      "integrity": "sha1-nJkJQXbhIkDLItbFFGCYQA/g99Q=",
+      "dev": true,
+      "requires": {
+        "graceful-readlink": ">= 1.0.0"
+      }
+    },
+    "component-bind": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/component-bind/-/component-bind-1.0.0.tgz",
+      "integrity": "sha1-AMYIq33Nk4l8AAllGx06jh5zu9E="
+    },
+    "component-emitter": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.2.1.tgz",
+      "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY="
+    },
+    "component-inherit": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/component-inherit/-/component-inherit-0.0.3.tgz",
+      "integrity": "sha1-ZF/ErfWLcrZJ1crmUTVhnbJv8UM="
+    },
+    "concat-map": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
+      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
+      "dev": true
+    },
+    "cookie": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
+      "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s="
+    },
+    "cookiejar": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.2.tgz",
+      "integrity": "sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA==",
+      "dev": true
+    },
+    "core-util-is": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
+      "dev": true
+    },
+    "debug": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+      "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+      "requires": {
+        "ms": "^2.1.1"
+      }
+    },
+    "delayed-stream": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
+      "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk=",
+      "dev": true
+    },
+    "diff": {
+      "version": "3.2.0",
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+      "integrity": "sha1-yc45Okt8vQsFinJck98pkCeGj/k=",
+      "dev": true
+    },
+    "engine.io": {
+      "version": "3.4.2",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.4.2.tgz",
+      "integrity": "sha512-b4Q85dFkGw+TqgytGPrGgACRUhsdKc9S9ErRAXpPGy/CXKs4tYoHDkvIRdsseAF7NjfVwjRFIn6KTnbw7LwJZg==",
+      "requires": {
+        "accepts": "~1.3.4",
+        "base64id": "2.0.0",
+        "cookie": "0.3.1",
+        "debug": "~4.1.0",
+        "engine.io-parser": "~2.2.0",
+        "ws": "^7.1.2"
+      }
+    },
+    "engine.io-client": {
+      "version": "3.4.4",
+      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.4.4.tgz",
+      "integrity": "sha512-iU4CRr38Fecj8HoZEnFtm2EiKGbYZcPn3cHxqNGl/tmdWRf60KhK+9vE0JeSjgnlS/0oynEfLgKbT9ALpim0sQ==",
+      "requires": {
+        "component-emitter": "~1.3.0",
+        "component-inherit": "0.0.3",
+        "debug": "~3.1.0",
+        "engine.io-parser": "~2.2.0",
+        "has-cors": "1.1.0",
+        "indexof": "0.0.1",
+        "parseqs": "0.0.6",
+        "parseuri": "0.0.6",
+        "ws": "~6.1.0",
+        "xmlhttprequest-ssl": "~1.5.4",
+        "yeast": "0.1.2"
+      },
+      "dependencies": {
+        "component-emitter": {
+          "version": "1.3.0",
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+          }
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+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
+        },
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+          "resolved": "https://registry.npmjs.org/parseqs/-/parseqs-0.0.6.tgz",
+          "integrity": "sha512-jeAGzMDbfSHHA091hr0r31eYfTig+29g3GKKE/PPbEQ65X0lmMwlEoqmhzu0iztID5uJpZsFlUPDP8ThPL7M8w=="
+        },
+        "parseuri": {
+          "version": "0.0.6",
+          "resolved": "https://registry.npmjs.org/parseuri/-/parseuri-0.0.6.tgz",
+          "integrity": "sha512-AUjen8sAkGgao7UyCX6Ahv0gIK2fABKmYjvP4xmy5JaKvcbTRueIqIPHLAfq30xJddqSE033IOMUSOMCcK3Sow=="
+        },
+        "ws": {
+          "version": "6.1.4",
+          "resolved": "https://registry.npmjs.org/ws/-/ws-6.1.4.tgz",
+          "integrity": "sha512-eqZfL+NE/YQc1/ZynhojeV8q+H050oR8AZ2uIev7RU10svA9ZnJUddHcOUZTJLinZ9yEfdA2kSATS2qZK5fhJA==",
+          "requires": {
+            "async-limiter": "~1.0.0"
+          }
+        }
+      }
+    },
+    "engine.io-parser": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/engine.io-parser/-/engine.io-parser-2.2.1.tgz",
+      "integrity": "sha512-x+dN/fBH8Ro8TFwJ+rkB2AmuVw9Yu2mockR/p3W8f8YtExwFgDvBDi0GWyb4ZLkpahtDGZgtr3zLovanJghPqg==",
+      "requires": {
+        "after": "0.8.2",
+        "arraybuffer.slice": "~0.0.7",
+        "base64-arraybuffer": "0.1.4",
+        "blob": "0.0.5",
+        "has-binary2": "~1.0.2"
+      }
+    },
+    "escape-string-regexp": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
+      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
+      "dev": true
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+      "version": "0.0.5",
+      "resolved": "https://registry.npmjs.org/parseqs/-/parseqs-0.0.5.tgz",
+      "integrity": "sha1-1SCKNzjkZ2bikbouoXNoSSGouJ0=",
+      "requires": {
+        "better-assert": "~1.0.0"
+      }
+    },
+    "parseuri": {
+      "version": "0.0.5",
+      "resolved": "https://registry.npmjs.org/parseuri/-/parseuri-0.0.5.tgz",
+      "integrity": "sha1-gCBKUNTbt3m/3G6+J3jZDkvOMgo=",
+      "requires": {
+        "better-assert": "~1.0.0"
+      }
+    },
+    "path-is-absolute": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
+      "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
+      "dev": true
+    },
+    "process-nextick-args": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
+      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag==",
+      "dev": true
+    },
+    "qs": {
+      "version": "6.9.4",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.9.4.tgz",
+      "integrity": "sha512-A1kFqHekCTM7cz0udomYUoYNWjBebHm/5wzU/XqrBRBNWectVH0QIiN+NEcZ0Dte5hvzHwbr8+XQmguPhJ6WdQ==",
+      "dev": true
+    },
+    "readable-stream": {
+      "version": "2.3.7",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.7.tgz",
+      "integrity": "sha512-Ebho8K4jIbHAxnuxi7o42OrZgF/ZTNcsZj6nRKyUmkhLFq8CHItp/fy6hQZuZmP/n3yZ9VBUbp4zz/mX8hmYPw==",
+      "dev": true,
+      "requires": {
+        "core-util-is": "~1.0.0",
+        "inherits": "~2.0.3",
+        "isarray": "~1.0.0",
+        "process-nextick-args": "~2.0.0",
+        "safe-buffer": "~5.1.1",
+        "string_decoder": "~1.1.1",
+        "util-deprecate": "~1.0.1"
+      },
+      "dependencies": {
+        "isarray": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
+          "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE=",
+          "dev": true
+        }
+      }
+    },
+    "safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+      "dev": true
+    },
+    "socket.io-adapter": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/socket.io-adapter/-/socket.io-adapter-1.1.2.tgz",
+      "integrity": "sha512-WzZRUj1kUjrTIrUKpZLEzFZ1OLj5FwLlAFQs9kuZJzJi5DKdU7FsWc36SNmA8iDOtwBQyT8FkrriRM8vXLYz8g=="
+    },
+    "socket.io-client": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/socket.io-client/-/socket.io-client-2.3.0.tgz",
+      "integrity": "sha512-cEQQf24gET3rfhxZ2jJ5xzAOo/xhZwK+mOqtGRg5IowZsMgwvHwnf/mCRapAAkadhM26y+iydgwsXGObBB5ZdA==",
+      "requires": {
+        "backo2": "1.0.2",
+        "base64-arraybuffer": "0.1.5",
+        "component-bind": "1.0.0",
+        "component-emitter": "1.2.1",
+        "debug": "~4.1.0",
+        "engine.io-client": "~3.4.0",
+        "has-binary2": "~1.0.2",
+        "has-cors": "1.1.0",
+        "indexof": "0.0.1",
+        "object-component": "0.0.3",
+        "parseqs": "0.0.5",
+        "parseuri": "0.0.5",
+        "socket.io-parser": "~3.3.0",
+        "to-array": "0.1.4"
+      },
+      "dependencies": {
+        "base64-arraybuffer": {
+          "version": "0.1.5",
+          "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.5.tgz",
+          "integrity": "sha1-c5JncZI7Whl0etZmqlzUv5xunOg="
+        },
+        "ms": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
+        },
+        "socket.io-parser": {
+          "version": "3.3.1",
+          "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.3.1.tgz",
+          "integrity": "sha512-1QLvVAe8dTz+mKmZ07Swxt+LAo4Y1ff50rlyoEx00TQmDFVQYPfcqGvIDJLGaBdhdNCecXtyKpD+EgKGcmmbuQ==",
+          "requires": {
+            "component-emitter": "~1.3.0",
+            "debug": "~3.1.0",
+            "isarray": "2.0.1"
+          },
+          "dependencies": {
+            "component-emitter": {
+              "version": "1.3.0",
+              "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz",
+              "integrity": "sha512-Rd3se6QB+sO1TwqZjscQrurpEPIfO0/yYnSin6Q/rD3mOutHvUrCAhJub3r90uNb+SESBuE0QYoB90YdfatsRg=="
+            },
+            "debug": {
+              "version": "3.1.0",
+              "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+              "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
+              "requires": {
+                "ms": "2.0.0"
+              }
+            }
+          }
+        }
+      }
+    },
+    "socket.io-parser": {
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.4.1.tgz",
+      "integrity": "sha512-11hMgzL+WCLWf1uFtHSNvliI++tcRUWdoeYuwIl+Axvwy9z2gQM+7nJyN3STj1tLj5JyIUH8/gpDGxzAlDdi0A==",
+      "requires": {
+        "component-emitter": "1.2.1",
+        "debug": "~4.1.0",
+        "isarray": "2.0.1"
+      }
+    },
+    "string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "dev": true,
+      "requires": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
+    "superagent": {
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/superagent/-/superagent-3.8.3.tgz",
+      "integrity": "sha512-GLQtLMCoEIK4eDv6OGtkOoSMt3D+oq0y3dsxMuYuDvaNUvuT8eFBuLmfR0iYYzHC1e8hpzC6ZsxbuP6DIalMFA==",
+      "dev": true,
+      "requires": {
+        "component-emitter": "^1.2.0",
+        "cookiejar": "^2.1.0",
+        "debug": "^3.1.0",
+        "extend": "^3.0.0",
+        "form-data": "^2.3.1",
+        "formidable": "^1.2.0",
+        "methods": "^1.1.1",
+        "mime": "^1.4.1",
+        "qs": "^6.5.1",
+        "readable-stream": "^2.3.5"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "3.2.7",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.7.tgz",
+          "integrity": "sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==",
+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        }
+      }
+    },
+    "supertest": {
+      "version": "3.4.2",
+      "resolved": "https://registry.npmjs.org/supertest/-/supertest-3.4.2.tgz",
+      "integrity": "sha512-WZWbwceHUo2P36RoEIdXvmqfs47idNNZjCuJOqDz6rvtkk8ym56aU5oglORCpPeXGxT7l9rkJ41+O1lffQXYSA==",
+      "dev": true,
+      "requires": {
+        "methods": "^1.1.2",
+        "superagent": "^3.8.3"
+      }
+    },
+    "to-array": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/to-array/-/to-array-0.1.4.tgz",
+      "integrity": "sha1-F+bBH3PdTz10zaek/zI46a2b+JA="
+    },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
+      "dev": true
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "dev": true
+    },
+    "ws": {
+      "version": "7.4.2",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.2.tgz",
+      "integrity": "sha512-T4tewALS3+qsrpGI/8dqNMLIVdq/g/85U98HPMa6F0m6xTbvhXU6RCQLqPH3+SlomNV/LdY6RXEbBpMH6EOJnA=="
+    },
+    "xmlhttprequest-ssl": {
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",
+      "integrity": "sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4="
+    },
+    "yeast": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
+      "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk="
+    }
+  }
+}

From 3951a79359c19f9497de664d96a8f9f80196a405 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Mon, 4 Jan 2021 10:50:13 +0100
Subject: [PATCH 48/59] chore: bump engine.io version

Diff: https://github.com/socketio/engine.io/compare/3.4.2...3.5.0
---
 package-lock.json | 16 ++++++++--------
 package.json      |  2 +-
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 6ad0ec1dde..cdad32a12b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -129,9 +129,9 @@
       "dev": true
     },
     "cookie": {
-      "version": "0.3.1",
-      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
-      "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s="
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.1.tgz",
+      "integrity": "sha512-ZwrFkGJxUR3EIoXtO+yVE69Eb7KlixbaeAWfBQB9vVsNn/o+Yw69gBWSSDK825hQNdN+wF8zELf3dFNl/kxkUA=="
     },
     "cookiejar": {
       "version": "2.1.2",
@@ -166,16 +166,16 @@
       "dev": true
     },
     "engine.io": {
-      "version": "3.4.2",
-      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.4.2.tgz",
-      "integrity": "sha512-b4Q85dFkGw+TqgytGPrGgACRUhsdKc9S9ErRAXpPGy/CXKs4tYoHDkvIRdsseAF7NjfVwjRFIn6KTnbw7LwJZg==",
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.5.0.tgz",
+      "integrity": "sha512-21HlvPUKaitDGE4GXNtQ7PLP0Sz4aWLddMPw2VTyFz1FVZqu/kZsJUO8WNpKuE/OCL7nkfRaOui2ZCJloGznGA==",
       "requires": {
         "accepts": "~1.3.4",
         "base64id": "2.0.0",
-        "cookie": "0.3.1",
+        "cookie": "~0.4.1",
         "debug": "~4.1.0",
         "engine.io-parser": "~2.2.0",
-        "ws": "^7.1.2"
+        "ws": "~7.4.2"
       }
     },
     "engine.io-client": {
diff --git a/package.json b/package.json
index 3d648fec14..c2ec6f0aa0 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   },
   "dependencies": {
     "debug": "~4.1.0",
-    "engine.io": "~3.4.0",
+    "engine.io": "~3.5.0",
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
     "socket.io-client": "2.3.0",

From d33a619905a4905c153d4fec337c74da5b533a9e Mon Sep 17 00:00:00 2001
From: Sebastiaan Marynissen <sebastiaan.marynissen@gmail.com>
Date: Tue, 15 Oct 2019 09:20:00 +0200
Subject: [PATCH 49/59] fix: properly overwrite the query sent in the handshake

The `query` option of the Manager had the priority over the one of the
Socket instance, which meant updating the Socket#query object on the
client-side was not reflected in the Socket#handshake object on the
server-side.

Please note that the behavior of the `query` option is still a bit
weird in Socket.IO v2, as it only applies to non-default namespace.
This is fixed in v3:

- https://socket.io/docs/v3/migrating-from-2-x-to-3-0/#Add-a-clear-distinction-between-the-Manager-query-option-and-the-Socket-query-option
- https://socket.io/docs/v3/middlewares/#Sending-credentials

Fixes https://github.com/socketio/socket.io/issues/3495
---
 lib/socket.js     |  2 +-
 test/socket.io.js | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/lib/socket.js b/lib/socket.js
index 9a96929728..4e97eb55dd 100644
--- a/lib/socket.js
+++ b/lib/socket.js
@@ -116,7 +116,7 @@ Socket.prototype.buildHandshake = function(query){
   function buildQuery(){
     var requestQuery = url.parse(self.request.url, true).query;
     //if socket-specific query exist, replace query strings in requestQuery
-    return Object.assign({}, query, requestQuery);
+    return Object.assign({}, requestQuery, query);
   }
   return {
     headers: this.request.headers,
diff --git a/test/socket.io.js b/test/socket.io.js
index 337f2ebd4a..6cc085b798 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -1621,8 +1621,25 @@ describe('socket.io', function(){
         expect(s.handshake.query.key2).to.be('&=bb');
         done();
       });
+    });
+
+    it('should see the query options sent in the Socket.IO handshake (specific to the given socket)', (done) => {
+      const srv = http();
+      const sio = io(srv);
+      const socket = client(srv, '/namespace',{ query: { key1: 'a', key2: 'b' }}); // manager-specific query option
+      socket.query = { key2: 'c' }; // socket-specific query option
 
+      const success = () => {
+        sio.close();
+        socket.close();
+        done();
+      }
 
+      sio.of('/namespace').on('connection', (s) => {
+        expect(s.handshake.query.key1).to.be('a'); // in the query params
+        expect(s.handshake.query.key2).to.be('c'); // in the Socket.IO handshake
+        success();
+      });
     });
 
     it('should handle very large json', function(done){

From f78a575f66ab693c3ea96ea88429ddb1a44c86c7 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Mon, 4 Jan 2021 12:09:57 +0100
Subject: [PATCH 50/59] fix(security): do not allow all origins by default

BREAKING CHANGE: previously, all origins were allowed by default, which
meant that a Socket.IO server sent the necessary CORS headers
(`Access-Control-Allow-xxx`) to any domain by default.

Please note that you are not impacted if:

- you are using Socket.IO v2 and the `origins` option to restrict the list of allowed domains
- you are using Socket.IO v3 (disabled by default)

This commit also removes the support for '*' matchers and protocol-less
URL:

```
io.origins('https://example.com:443'); => io.origins(['https://example.com']);
io.origins('localhost:3000');          => io.origins(['http://localhost:3000']);
io.origins('http://localhost:*');      => io.origins(['http://localhost:3000']);
io.origins('*:3000');                  => io.origins(['http://localhost:3000']);
```

To restore the previous behavior (please use with caution):

```js
io.origins((_, callback) => {
  callback(null, true);
});
```

See also:

- https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS
- https://socket.io/docs/v3/handling-cors/
- https://socket.io/docs/v3/migrating-from-2-x-to-3-0/#CORS-handling

Thanks a lot to https://github.com/ni8walk3r for the security report.
---
 lib/index.js      | 33 ++++++++++-----------------------
 test/socket.io.js | 37 +++++++++++++------------------------
 2 files changed, 23 insertions(+), 47 deletions(-)

diff --git a/lib/index.js b/lib/index.js
index 5287e4ead0..3cae6c10de 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -54,7 +54,7 @@ function Server(srv, opts){
   this.parser = opts.parser || parser;
   this.encoder = new this.parser.Encoder();
   this.adapter(opts.adapter || Adapter);
-  this.origins(opts.origins || '*:*');
+  this.origins(opts.origins || []);
   this.sockets = this.of('/');
   if (srv) this.attach(srv, opts);
 }
@@ -67,31 +67,18 @@ function Server(srv, opts){
  */
 
 Server.prototype.checkRequest = function(req, fn) {
-  var origin = req.headers.origin || req.headers.referer;
+  const origin = req.headers.origin;
 
-  // file:// URLs produce a null Origin which can't be authorized via echo-back
-  if ('null' == origin || null == origin) origin = '*';
+  if (typeof this._origins === 'function') {
+    return this._origins(origin, fn);
+  }
 
-  if (!!origin && typeof(this._origins) == 'function') return this._origins(origin, fn);
-  if (this._origins.indexOf('*:*') !== -1) return fn(null, true);
   if (origin) {
-    try {
-      var parts = url.parse(origin);
-      var defaultPort = 'https:' == parts.protocol ? 443 : 80;
-      parts.port = parts.port != null
-        ? parts.port
-        : defaultPort;
-      var ok =
-        ~this._origins.indexOf(parts.protocol + '//' + parts.hostname + ':' + parts.port) ||
-        ~this._origins.indexOf(parts.hostname + ':' + parts.port) ||
-        ~this._origins.indexOf(parts.hostname + ':*') ||
-        ~this._origins.indexOf('*:' + parts.port);
-      debug('origin %s is %svalid', origin, !!ok ? '' : 'not ');
-      return fn(null, !!ok);
-    } catch (ex) {
-    }
+    fn(null, this._origins.includes(origin));
+  } else {
+    const noOriginIsValid = this._origins.length === 0;
+    fn(null, noOriginIsValid);
   }
-  fn(null, false);
 };
 
 /**
@@ -237,7 +224,7 @@ Server.prototype.adapter = function(v){
 Server.prototype.origins = function(v){
   if (!arguments.length) return this._origins;
 
-  this._origins = v;
+  this._origins = typeof v === 'string' ? [v] : v;
   return this;
 };
 
diff --git a/test/socket.io.js b/test/socket.io.js
index 6cc085b798..7252bb78e7 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -73,7 +73,7 @@ describe('socket.io', function(){
     it('should be able to set origins to engine.io', function() {
       var srv = io(http());
       srv.set('origins', 'http://hostname.com:*');
-      expect(srv.origins()).to.be('http://hostname.com:*');
+      expect(srv.origins()).to.eql(['http://hostname.com:*']);
     });
 
     it('should be able to set authorization and send error packet', function(done) {
@@ -262,17 +262,6 @@ describe('socket.io', function(){
        });
     });
 
-    it('should allow request when origin defined an the same is specified', function(done) {
-      var sockets = io({ origins: 'http://foo.example:*' }).listen('54015');
-      request.get('http://localhost:54015/socket.io/default/')
-       .set('origin', 'http://foo.example')
-       .query({ transport: 'polling' })
-       .end(function (err, res) {
-          expect(res.status).to.be(200);
-          done();
-        });
-    });
-
     it('should allow request when origin defined as function and same is supplied', function(done) {
       var sockets = io({ origins: function(origin,callback){
         if (origin == 'http://foo.example') {
@@ -307,7 +296,7 @@ describe('socket.io', function(){
 
     it('should allow request when origin defined as function and no origin is supplied', function(done) {
       var sockets = io({ origins: function(origin,callback){
-        if (origin == '*') {
+        if (origin === undefined) {
           return callback(null, true);
         }
         return callback(null, false);
@@ -320,17 +309,6 @@ describe('socket.io', function(){
         });
     });
 
-    it('should default to port 443 when protocol is https', function(done) {
-      var sockets = io({ origins: 'https://foo.example:443' }).listen('54036');
-      request.get('http://localhost:54036/socket.io/default/')
-        .set('origin', 'https://foo.example')
-        .query({ transport: 'polling' })
-        .end(function (err, res) {
-          expect(res.status).to.be(200);
-          done();
-        });
-    });
-
     it('should allow request if custom function in opts.allowRequest returns true', function(done){
       var sockets = io(http().listen(54022), { allowRequest: function (req, callback) {
         return callback(null, true);
@@ -367,6 +345,17 @@ describe('socket.io', function(){
           done();
         });
     });
+
+    it('should disallow any origin by default', (done) => {
+      io().listen('54025');
+      request.get('http://localhost:54025/socket.io/default/')
+        .set('origin', 'https://foo.example')
+        .query({ transport: 'polling' })
+        .end((err, res) => {
+          expect(res.status).to.be(403);
+          done();
+        });
+    });
   });
 
   describe('close', function(){

From 873fdc55eddd672960fdbc1325ccb7c4bf466f05 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Tue, 5 Jan 2021 00:27:13 +0100
Subject: [PATCH 51/59] chore(release): 2.4.0

Diff: https://github.com/socketio/socket.io/compare/2.3.0...2.4.0
---
 CHANGELOG.md      |   7 +++
 package-lock.json | 119 ++++++++++++----------------------------------
 package.json      |   4 +-
 3 files changed, 40 insertions(+), 90 deletions(-)
 create mode 100644 CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000000..b9cc377c5e
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,7 @@
+# [2.4.0](https://github.com/socketio/socket.io/compare/2.3.0...2.4.0) (2021-01-04)
+
+
+### Bug Fixes
+
+* **security:** do not allow all origins by default ([f78a575](https://github.com/socketio/socket.io/commit/f78a575f66ab693c3ea96ea88429ddb1a44c86c7))
+* properly overwrite the query sent in the handshake ([d33a619](https://github.com/socketio/socket.io/commit/d33a619905a4905c153d4fec337c74da5b533a9e))
diff --git a/package-lock.json b/package-lock.json
index cdad32a12b..940796ad51 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "socket.io",
-  "version": "2.3.0",
+  "version": "2.4.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -23,11 +23,6 @@
       "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz",
       "integrity": "sha512-wGUIVQXuehL5TCqQun8OW81jGzAWycqzFF8lFp+GOM5BXLYj3bKNsYC4daB7n6XjCqxQA/qgTJ+8ANR3acjrog=="
     },
-    "async-limiter": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
-      "integrity": "sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ=="
-    },
     "asynckit": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
@@ -55,14 +50,6 @@
       "resolved": "https://registry.npmjs.org/base64id/-/base64id-2.0.0.tgz",
       "integrity": "sha512-lGe34o6EHj9y3Kts9R4ZYs/Gr+6N7MCaMlIFA3F1R2O5/m7K06AxfSeO5530PEERE6/WyEg3lsuyw4GHlPZHog=="
     },
-    "better-assert": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/better-assert/-/better-assert-1.0.2.tgz",
-      "integrity": "sha1-QIZrnhueC1W0gYlDEeaPr/rrxSI=",
-      "requires": {
-        "callsite": "1.0.0"
-      }
-    },
     "blob": {
       "version": "0.0.5",
       "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.5.tgz",
@@ -84,11 +71,6 @@
       "integrity": "sha1-81HTKWnTL6XXpVZxVCY9korjvR8=",
       "dev": true
     },
-    "callsite": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/callsite/-/callsite-1.0.0.tgz",
-      "integrity": "sha1-KAOY5dZkvXQDi28JBRU+borxvCA="
-    },
     "combined-stream": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
@@ -179,9 +161,9 @@
       }
     },
     "engine.io-client": {
-      "version": "3.4.4",
-      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.4.4.tgz",
-      "integrity": "sha512-iU4CRr38Fecj8HoZEnFtm2EiKGbYZcPn3cHxqNGl/tmdWRf60KhK+9vE0JeSjgnlS/0oynEfLgKbT9ALpim0sQ==",
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/engine.io-client/-/engine.io-client-3.5.0.tgz",
+      "integrity": "sha512-12wPRfMrugVw/DNyJk34GQ5vIVArEcVMXWugQGGuw2XxUSztFNmJggZmv8IZlLyEdnpO1QB9LkcjeWewO2vxtA==",
       "requires": {
         "component-emitter": "~1.3.0",
         "component-inherit": "0.0.3",
@@ -191,7 +173,7 @@
         "indexof": "0.0.1",
         "parseqs": "0.0.6",
         "parseuri": "0.0.6",
-        "ws": "~6.1.0",
+        "ws": "~7.4.2",
         "xmlhttprequest-ssl": "~1.5.4",
         "yeast": "0.1.2"
       },
@@ -213,24 +195,6 @@
           "version": "2.0.0",
           "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
           "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
-        },
-        "parseqs": {
-          "version": "0.0.6",
-          "resolved": "https://registry.npmjs.org/parseqs/-/parseqs-0.0.6.tgz",
-          "integrity": "sha512-jeAGzMDbfSHHA091hr0r31eYfTig+29g3GKKE/PPbEQ65X0lmMwlEoqmhzu0iztID5uJpZsFlUPDP8ThPL7M8w=="
-        },
-        "parseuri": {
-          "version": "0.0.6",
-          "resolved": "https://registry.npmjs.org/parseuri/-/parseuri-0.0.6.tgz",
-          "integrity": "sha512-AUjen8sAkGgao7UyCX6Ahv0gIK2fABKmYjvP4xmy5JaKvcbTRueIqIPHLAfq30xJddqSE033IOMUSOMCcK3Sow=="
-        },
-        "ws": {
-          "version": "6.1.4",
-          "resolved": "https://registry.npmjs.org/ws/-/ws-6.1.4.tgz",
-          "integrity": "sha512-eqZfL+NE/YQc1/ZynhojeV8q+H050oR8AZ2uIev7RU10svA9ZnJUddHcOUZTJLinZ9yEfdA2kSATS2qZK5fhJA==",
-          "requires": {
-            "async-limiter": "~1.0.0"
-          }
         }
       }
     },
@@ -3175,11 +3139,6 @@
         }
       }
     },
-    "object-component": {
-      "version": "0.0.3",
-      "resolved": "https://registry.npmjs.org/object-component/-/object-component-0.0.3.tgz",
-      "integrity": "sha1-8MaapQ78lbhmwYb0AKM3acsvEpE="
-    },
     "once": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
@@ -3190,20 +3149,14 @@
       }
     },
     "parseqs": {
-      "version": "0.0.5",
-      "resolved": "https://registry.npmjs.org/parseqs/-/parseqs-0.0.5.tgz",
-      "integrity": "sha1-1SCKNzjkZ2bikbouoXNoSSGouJ0=",
-      "requires": {
-        "better-assert": "~1.0.0"
-      }
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/parseqs/-/parseqs-0.0.6.tgz",
+      "integrity": "sha512-jeAGzMDbfSHHA091hr0r31eYfTig+29g3GKKE/PPbEQ65X0lmMwlEoqmhzu0iztID5uJpZsFlUPDP8ThPL7M8w=="
     },
     "parseuri": {
-      "version": "0.0.5",
-      "resolved": "https://registry.npmjs.org/parseuri/-/parseuri-0.0.5.tgz",
-      "integrity": "sha1-gCBKUNTbt3m/3G6+J3jZDkvOMgo=",
-      "requires": {
-        "better-assert": "~1.0.0"
-      }
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/parseuri/-/parseuri-0.0.6.tgz",
+      "integrity": "sha512-AUjen8sAkGgao7UyCX6Ahv0gIK2fABKmYjvP4xmy5JaKvcbTRueIqIPHLAfq30xJddqSE033IOMUSOMCcK3Sow=="
     },
     "path-is-absolute": {
       "version": "1.0.1",
@@ -3258,30 +3211,35 @@
       "integrity": "sha512-WzZRUj1kUjrTIrUKpZLEzFZ1OLj5FwLlAFQs9kuZJzJi5DKdU7FsWc36SNmA8iDOtwBQyT8FkrriRM8vXLYz8g=="
     },
     "socket.io-client": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/socket.io-client/-/socket.io-client-2.3.0.tgz",
-      "integrity": "sha512-cEQQf24gET3rfhxZ2jJ5xzAOo/xhZwK+mOqtGRg5IowZsMgwvHwnf/mCRapAAkadhM26y+iydgwsXGObBB5ZdA==",
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/socket.io-client/-/socket.io-client-2.4.0.tgz",
+      "integrity": "sha512-M6xhnKQHuuZd4Ba9vltCLT9oa+YvTsP8j9NcEiLElfIg8KeYPyhWOes6x4t+LTAC8enQbE/995AdTem2uNyKKQ==",
       "requires": {
         "backo2": "1.0.2",
-        "base64-arraybuffer": "0.1.5",
         "component-bind": "1.0.0",
-        "component-emitter": "1.2.1",
-        "debug": "~4.1.0",
-        "engine.io-client": "~3.4.0",
+        "component-emitter": "~1.3.0",
+        "debug": "~3.1.0",
+        "engine.io-client": "~3.5.0",
         "has-binary2": "~1.0.2",
-        "has-cors": "1.1.0",
         "indexof": "0.0.1",
-        "object-component": "0.0.3",
-        "parseqs": "0.0.5",
-        "parseuri": "0.0.5",
+        "parseqs": "0.0.6",
+        "parseuri": "0.0.6",
         "socket.io-parser": "~3.3.0",
         "to-array": "0.1.4"
       },
       "dependencies": {
-        "base64-arraybuffer": {
-          "version": "0.1.5",
-          "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.5.tgz",
-          "integrity": "sha1-c5JncZI7Whl0etZmqlzUv5xunOg="
+        "component-emitter": {
+          "version": "1.3.0",
+          "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz",
+          "integrity": "sha512-Rd3se6QB+sO1TwqZjscQrurpEPIfO0/yYnSin6Q/rD3mOutHvUrCAhJub3r90uNb+SESBuE0QYoB90YdfatsRg=="
+        },
+        "debug": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
+          "requires": {
+            "ms": "2.0.0"
+          }
         },
         "ms": {
           "version": "2.0.0",
@@ -3296,21 +3254,6 @@
             "component-emitter": "~1.3.0",
             "debug": "~3.1.0",
             "isarray": "2.0.1"
-          },
-          "dependencies": {
-            "component-emitter": {
-              "version": "1.3.0",
-              "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz",
-              "integrity": "sha512-Rd3se6QB+sO1TwqZjscQrurpEPIfO0/yYnSin6Q/rD3mOutHvUrCAhJub3r90uNb+SESBuE0QYoB90YdfatsRg=="
-            },
-            "debug": {
-              "version": "3.1.0",
-              "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
-              "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
-              "requires": {
-                "ms": "2.0.0"
-              }
-            }
           }
         }
       }
diff --git a/package.json b/package.json
index c2ec6f0aa0..6309ee7aad 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "socket.io",
-  "version": "2.3.0",
+  "version": "2.4.0",
   "description": "node.js realtime framework server",
   "keywords": [
     "realtime",
@@ -28,7 +28,7 @@
     "engine.io": "~3.5.0",
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
-    "socket.io-client": "2.3.0",
+    "socket.io-client": "2.4.0",
     "socket.io-parser": "~3.4.0"
   },
   "devDependencies": {

From a1690509470e9dd5559cec4e60908ca6c23e9ba0 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Thu, 7 Jan 2021 10:51:55 +0100
Subject: [PATCH 52/59] revert: fix(security): do not allow all origins by
 default

This reverts commit f78a575f66ab693c3ea96ea88429ddb1a44c86c7.

This commit contains a breaking change which deviates from semver,
which we try to follow as closely as possible. That's why this change
is reverted and we will rather suggest users to upgrade to v3.

Related: https://github.com/socketio/socket.io/discussions/3741
---
 lib/index.js      | 33 +++++++++++++++++++++++----------
 test/socket.io.js | 37 ++++++++++++++++++++++++-------------
 2 files changed, 47 insertions(+), 23 deletions(-)

diff --git a/lib/index.js b/lib/index.js
index 3cae6c10de..5287e4ead0 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -54,7 +54,7 @@ function Server(srv, opts){
   this.parser = opts.parser || parser;
   this.encoder = new this.parser.Encoder();
   this.adapter(opts.adapter || Adapter);
-  this.origins(opts.origins || []);
+  this.origins(opts.origins || '*:*');
   this.sockets = this.of('/');
   if (srv) this.attach(srv, opts);
 }
@@ -67,18 +67,31 @@ function Server(srv, opts){
  */
 
 Server.prototype.checkRequest = function(req, fn) {
-  const origin = req.headers.origin;
+  var origin = req.headers.origin || req.headers.referer;
 
-  if (typeof this._origins === 'function') {
-    return this._origins(origin, fn);
-  }
+  // file:// URLs produce a null Origin which can't be authorized via echo-back
+  if ('null' == origin || null == origin) origin = '*';
 
+  if (!!origin && typeof(this._origins) == 'function') return this._origins(origin, fn);
+  if (this._origins.indexOf('*:*') !== -1) return fn(null, true);
   if (origin) {
-    fn(null, this._origins.includes(origin));
-  } else {
-    const noOriginIsValid = this._origins.length === 0;
-    fn(null, noOriginIsValid);
+    try {
+      var parts = url.parse(origin);
+      var defaultPort = 'https:' == parts.protocol ? 443 : 80;
+      parts.port = parts.port != null
+        ? parts.port
+        : defaultPort;
+      var ok =
+        ~this._origins.indexOf(parts.protocol + '//' + parts.hostname + ':' + parts.port) ||
+        ~this._origins.indexOf(parts.hostname + ':' + parts.port) ||
+        ~this._origins.indexOf(parts.hostname + ':*') ||
+        ~this._origins.indexOf('*:' + parts.port);
+      debug('origin %s is %svalid', origin, !!ok ? '' : 'not ');
+      return fn(null, !!ok);
+    } catch (ex) {
+    }
   }
+  fn(null, false);
 };
 
 /**
@@ -224,7 +237,7 @@ Server.prototype.adapter = function(v){
 Server.prototype.origins = function(v){
   if (!arguments.length) return this._origins;
 
-  this._origins = typeof v === 'string' ? [v] : v;
+  this._origins = v;
   return this;
 };
 
diff --git a/test/socket.io.js b/test/socket.io.js
index 7252bb78e7..6cc085b798 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -73,7 +73,7 @@ describe('socket.io', function(){
     it('should be able to set origins to engine.io', function() {
       var srv = io(http());
       srv.set('origins', 'http://hostname.com:*');
-      expect(srv.origins()).to.eql(['http://hostname.com:*']);
+      expect(srv.origins()).to.be('http://hostname.com:*');
     });
 
     it('should be able to set authorization and send error packet', function(done) {
@@ -262,6 +262,17 @@ describe('socket.io', function(){
        });
     });
 
+    it('should allow request when origin defined an the same is specified', function(done) {
+      var sockets = io({ origins: 'http://foo.example:*' }).listen('54015');
+      request.get('http://localhost:54015/socket.io/default/')
+       .set('origin', 'http://foo.example')
+       .query({ transport: 'polling' })
+       .end(function (err, res) {
+          expect(res.status).to.be(200);
+          done();
+        });
+    });
+
     it('should allow request when origin defined as function and same is supplied', function(done) {
       var sockets = io({ origins: function(origin,callback){
         if (origin == 'http://foo.example') {
@@ -296,7 +307,7 @@ describe('socket.io', function(){
 
     it('should allow request when origin defined as function and no origin is supplied', function(done) {
       var sockets = io({ origins: function(origin,callback){
-        if (origin === undefined) {
+        if (origin == '*') {
           return callback(null, true);
         }
         return callback(null, false);
@@ -309,6 +320,17 @@ describe('socket.io', function(){
         });
     });
 
+    it('should default to port 443 when protocol is https', function(done) {
+      var sockets = io({ origins: 'https://foo.example:443' }).listen('54036');
+      request.get('http://localhost:54036/socket.io/default/')
+        .set('origin', 'https://foo.example')
+        .query({ transport: 'polling' })
+        .end(function (err, res) {
+          expect(res.status).to.be(200);
+          done();
+        });
+    });
+
     it('should allow request if custom function in opts.allowRequest returns true', function(done){
       var sockets = io(http().listen(54022), { allowRequest: function (req, callback) {
         return callback(null, true);
@@ -345,17 +367,6 @@ describe('socket.io', function(){
           done();
         });
     });
-
-    it('should disallow any origin by default', (done) => {
-      io().listen('54025');
-      request.get('http://localhost:54025/socket.io/default/')
-        .set('origin', 'https://foo.example')
-        .query({ transport: 'polling' })
-        .end((err, res) => {
-          expect(res.status).to.be(403);
-          done();
-        });
-    });
   });
 
   describe('close', function(){

From e6b869738c73fa0ce9928974d823e50cc92f7a1a Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Thu, 7 Jan 2021 10:59:46 +0100
Subject: [PATCH 53/59] chore(release): 2.4.1

Diff: https://github.com/socketio/socket.io/compare/2.4.0...2.4.1
---
 CHANGELOG.md      | 8 ++++++++
 package-lock.json | 2 +-
 package.json      | 2 +-
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b9cc377c5e..e8552f75af 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## [2.4.1](https://github.com/socketio/socket.io/compare/2.4.0...2.4.1) (2021-01-07)
+
+
+### Reverts
+
+* fix(security): do not allow all origins by default ([a169050](https://github.com/socketio/socket.io/commit/a1690509470e9dd5559cec4e60908ca6c23e9ba0))
+
+
 # [2.4.0](https://github.com/socketio/socket.io/compare/2.3.0...2.4.0) (2021-01-04)
 
 
diff --git a/package-lock.json b/package-lock.json
index 940796ad51..ca0df4d6d7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "socket.io",
-  "version": "2.4.0",
+  "version": "2.4.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 6309ee7aad..fb79d512f9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "socket.io",
-  "version": "2.4.0",
+  "version": "2.4.1",
   "description": "node.js realtime framework server",
   "keywords": [
     "realtime",

From dfded535933ad29d37b0784ed98040090ad860c6 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Sun, 26 Jun 2022 08:13:06 +0200
Subject: [PATCH 54/59] chore: update engine.io version to 3.6.0

Release notes: https://github.com/socketio/engine.io/releases/tag/3.6.0
Diff: https://github.com/socketio/engine.io/compare/3.5.0...3.6.0
---
 package-lock.json | 4491 ++++++++++++++++++++++++++++++++++++++++++++-
 package.json      |    2 +-
 2 files changed, 4487 insertions(+), 6 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index ca0df4d6d7..d793935325 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,8 +1,4488 @@
 {
   "name": "socket.io",
   "version": "2.4.1",
-  "lockfileVersion": 1,
+  "lockfileVersion": 2,
   "requires": true,
+  "packages": {
+    "": {
+      "name": "socket.io",
+      "version": "2.4.1",
+      "license": "MIT",
+      "dependencies": {
+        "debug": "~4.1.0",
+        "engine.io": "~3.6.0",
+        "has-binary2": "~1.0.2",
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+      "version": "7.4.2",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.2.tgz",
+      "integrity": "sha512-T4tewALS3+qsrpGI/8dqNMLIVdq/g/85U98HPMa6F0m6xTbvhXU6RCQLqPH3+SlomNV/LdY6RXEbBpMH6EOJnA==",
+      "engines": {
+        "node": ">=8.3.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": "^5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/xmlhttprequest-ssl": {
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",
+      "integrity": "sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4=",
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
+    "node_modules/yeast": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
+      "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk="
+    }
+  },
   "dependencies": {
     "accepts": {
       "version": "1.3.7",
@@ -148,9 +4628,9 @@
       "dev": true
     },
     "engine.io": {
-      "version": "3.5.0",
-      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.5.0.tgz",
-      "integrity": "sha512-21HlvPUKaitDGE4GXNtQ7PLP0Sz4aWLddMPw2VTyFz1FVZqu/kZsJUO8WNpKuE/OCL7nkfRaOui2ZCJloGznGA==",
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/engine.io/-/engine.io-3.6.0.tgz",
+      "integrity": "sha512-Kc8fo5bbg8F4a2f3HPHTEpGyq/IRIQpyeHu3H1ThR14XDD7VrLcsGBo16HUpahgp8YkHJDaU5gNxJZbuGcuueg==",
       "requires": {
         "accepts": "~1.3.4",
         "base64id": "2.0.0",
@@ -3336,7 +7816,8 @@
     "ws": {
       "version": "7.4.2",
       "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.2.tgz",
-      "integrity": "sha512-T4tewALS3+qsrpGI/8dqNMLIVdq/g/85U98HPMa6F0m6xTbvhXU6RCQLqPH3+SlomNV/LdY6RXEbBpMH6EOJnA=="
+      "integrity": "sha512-T4tewALS3+qsrpGI/8dqNMLIVdq/g/85U98HPMa6F0m6xTbvhXU6RCQLqPH3+SlomNV/LdY6RXEbBpMH6EOJnA==",
+      "requires": {}
     },
     "xmlhttprequest-ssl": {
       "version": "1.5.5",
diff --git a/package.json b/package.json
index fb79d512f9..08bc947a1b 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   },
   "dependencies": {
     "debug": "~4.1.0",
-    "engine.io": "~3.5.0",
+    "engine.io": "~3.6.0",
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
     "socket.io-client": "2.4.0",

From 22d4bdf00d1a03885dc0171125faddfaef730066 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Sun, 26 Jun 2022 08:35:42 +0200
Subject: [PATCH 55/59] fix: ignore packet received after disconnection

Related: https://github.com/socketio/socket.io/issues/3095

Backported from https://github.com/socketio/socket.io/commit/494c64e44f645cbd24c645f1186d203789e84af0
---
 lib/socket.js     |  6 +++++-
 test/socket.io.js | 27 +++++++++++++++++++++++++++
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/lib/socket.js b/lib/socket.js
index 4e97eb55dd..33ad8ba4a6 100644
--- a/lib/socket.js
+++ b/lib/socket.js
@@ -525,7 +525,11 @@ Socket.prototype.dispatch = function(event){
       if (err) {
         return self.error(err.data || err.message);
       }
-      emit.apply(self, event);
+      if (self.connected) {
+        emit.apply(self, event);
+      } else {
+        debug("ignore packet received after disconnection");
+      }
     });
   }
   this.run(event, dispatchSocket);
diff --git a/test/socket.io.js b/test/socket.io.js
index 6cc085b798..b75f0c259d 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -1838,6 +1838,33 @@ describe('socket.io', function(){
       });
     });
 
+    it("should ignore a packet received after disconnection", (done) => {
+      const srv = http();
+      const sio = io(srv);
+
+      srv.listen(() => {
+        const clientSocket = client(srv);
+
+        const success = () => {
+          clientSocket.close();
+          sio.close();
+          done();
+        };
+
+        sio.on("connection", (socket) => {
+          socket.on("test", () => {
+            done(new Error("should not happen"));
+          });
+          socket.on("disconnect", success);
+        });
+
+        clientSocket.on("connect", () => {
+          clientSocket.emit("test", Buffer.alloc(10));
+          clientSocket.disconnect();
+        });
+      });
+    });
+
     it('should always trigger the callback (if provided) when joining a room', function(done){
       var srv = http();
       var sio = io(srv);

From 05e1278cfa99f3ecf3f8f0531ffe57d850e9a05b Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Sun, 26 Jun 2022 08:41:16 +0200
Subject: [PATCH 56/59] fix: fix race condition in dynamic namespaces

Using an async operation with `io.use()` could lead to the creation of
several instances of a same namespace, each of them overriding the
previous one.

Example:

```js
io.use(async (nsp, auth, next) => {
  await anOperationThatTakesSomeTime();
  next();
});
```

Related: https://github.com/socketio/socket.io/issues/4136

Backported from https://github.com/socketio/socket.io/commit/9d86397243bcbb5775a29d96e5ef03e17148a8e7
---
 lib/client.js     |  1 -
 lib/index.js      | 14 ++++++++++----
 test/socket.io.js | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 46 insertions(+), 5 deletions(-)

diff --git a/lib/client.js b/lib/client.js
index 32d179f971..b1f9a22a1c 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -68,7 +68,6 @@ Client.prototype.connect = function(name, query){
 
   this.server.checkNamespace(name, query, (dynamicNsp) => {
     if (dynamicNsp) {
-      debug('dynamic namespace %s was created', dynamicNsp.name);
       this.doConnect(name, query);
     } else {
       debug('creation of namespace %s was denied', name);
diff --git a/lib/index.js b/lib/index.js
index 5287e4ead0..bf0d01e21d 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -182,11 +182,17 @@ Server.prototype.checkNamespace = function(name, query, fn){
       return fn(false);
     }
     nextFn.value(name, query, (err, allow) => {
-      if (err || !allow) {
-        run();
-      } else {
-        fn(this.parentNsps.get(nextFn.value).createChild(name));
+      if (err || !allow) {
+        return run();
       }
+      if (this.nsps[name]) {
+        // the namespace was created in the meantime
+        debug("dynamic namespace %s already exists", name);
+        return fn(this.nsps[name]);
+      }
+      const namespace = this.parentNsps.get(nextFn.value).createChild(name);
+      debug("dynamic namespace %s was created", name);
+      fn(namespace);
     });
   };
 
diff --git a/test/socket.io.js b/test/socket.io.js
index b75f0c259d..53ca2e656a 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -945,6 +945,42 @@ describe('socket.io', function(){
           });
         });
       });
+
+      it("should handle race conditions with dynamic namespaces (#4136)", (done) => {
+        const srv = http();
+        const sio = io(srv);
+        const counters = {
+          connected: 0,
+          created: 0,
+          events: 0,
+        };
+        const buffer = [];
+        srv.listen(() => {
+          const handler = () => {
+            if (++counters.events === 2) {
+              done();
+            }
+          };
+
+          sio
+            .of((name, query, next) => {
+              buffer.push(next);
+              if (buffer.length === 2) {
+                buffer.forEach((next) => next(null, true));
+              }
+            })
+            .on("connection", (socket) => {
+              if (++counters.connected === 2) {
+                sio.of("/dynamic-101").emit("message");
+              }
+            });
+
+          let one = client(srv, "/dynamic-101");
+          let two = client(srv, "/dynamic-101");
+          one.on("message", handler);
+          two.on("message", handler);
+        });
+      });
     });
   });
 

From 226cc16165f9fe60f16ff4d295fb91c8971cde35 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Sun, 26 Jun 2022 08:46:28 +0200
Subject: [PATCH 57/59] fix: only set 'connected' to true after middleware
 execution

The Socket instance is only considered connected when the "connection"
event is emitted, and not during the middleware(s) execution.

```js
io.use((socket, next) => {
  console.log(socket.connected); // prints "false"
  next();
});

io.on("connection", (socket) => {
  console.log(socket.connected); // prints "true"
});
```

Related: https://github.com/socketio/socket.io/issues/4129

Backported from https://github.com/socketio/socket.io/commit/02b0f73e2c64b09c72c5fbf7dc5f059557bdbe50
---
 lib/socket.js     |  6 ++++--
 test/socket.io.js | 19 +++++++++++++++++++
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/lib/socket.js b/lib/socket.js
index 33ad8ba4a6..dacaa440ca 100644
--- a/lib/socket.js
+++ b/lib/socket.js
@@ -66,8 +66,8 @@ function Socket(nsp, client, query){
   this.conn = client.conn;
   this.rooms = {};
   this.acks = {};
-  this.connected = true;
-  this.disconnected = false;
+  this.connected = false;
+  this.disconnected = true;
   this.handshake = this.buildHandshake(query);
   this.fns = [];
   this.flags = {};
@@ -300,6 +300,8 @@ Socket.prototype.leaveAll = function(){
 
 Socket.prototype.onconnect = function(){
   debug('socket connected - writing packet');
+  this.connected = true;
+  this.disconnected = false;
   this.nsp.connected[this.id] = this;
   this.join(this.id);
   var skip = this.nsp.name === '/' && this.nsp.fns.length === 0;
diff --git a/test/socket.io.js b/test/socket.io.js
index 53ca2e656a..aa786495a0 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -2442,6 +2442,25 @@ describe('socket.io', function(){
         if (++count === 2) done();
       });
     });
+
+    it("should only set `connected` to true after the middleware execution", (done) => {
+      const httpServer = http();
+      const sio = io(httpServer);
+
+      const clientSocket = client(httpServer, "/");
+
+      sio.use((socket, next) => {
+        expect(socket.connected).to.be(false);
+        expect(socket.disconnected).to.be(true);
+        next();
+      });
+
+      sio.on("connection", (socket) => {
+        expect(socket.connected).to.be(true);
+        expect(socket.disconnected).to.be(false);
+        done();
+      });
+    });
   });
 
   describe('socket middleware', function(done){

From f223178eb655a7713303b21a78f9ef9e161d6458 Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Sun, 26 Jun 2022 08:54:51 +0200
Subject: [PATCH 58/59] fix: prevent the socket from joining a room after
 disconnection

Calling `socket.join()` after disconnection would lead to a memory
leak, because the room was never removed from the memory:

```js
io.on("connection", (socket) => {
  socket.disconnect();
  socket.join("room1"); // leak
});
```

Related:

- https://github.com/socketio/socket.io/issues/4067
- https://github.com/socketio/socket.io/issues/4380

Backported from https://github.com/socketio/socket.io/commit/18f3fdab12947a9fee3e9c37cfc1da97027d1473
---
 lib/namespace.js  | 42 ++++++++++++++++++++++++------------------
 lib/socket.js     |  7 ++++++-
 test/socket.io.js | 37 +++++++++++++++++++++++++++++++++++++
 3 files changed, 67 insertions(+), 19 deletions(-)

diff --git a/lib/namespace.js b/lib/namespace.js
index bca8a3e99f..7e034bdb47 100644
--- a/lib/namespace.js
+++ b/lib/namespace.js
@@ -163,25 +163,31 @@ Namespace.prototype.add = function(client, query, fn){
   var self = this;
   this.run(socket, function(err){
     process.nextTick(function(){
-      if ('open' == client.conn.readyState) {
-        if (err) return socket.error(err.data || err.message);
-
-        // track socket
-        self.sockets[socket.id] = socket;
-
-        // it's paramount that the internal `onconnect` logic
-        // fires before user-set events to prevent state order
-        // violations (such as a disconnection before the connection
-        // logic is complete)
-        socket.onconnect();
-        if (fn) fn();
-
-        // fire user-set events
-        self.emit('connect', socket);
-        self.emit('connection', socket);
-      } else {
-        debug('next called after client was closed - ignoring socket');
+      if ("open" !== client.conn.readyState) {
+        debug("next called after client was closed - ignoring socket");
+        socket._cleanup();
+        return;
       }
+
+      if (err) {
+        debug("middleware error, sending CONNECT_ERROR packet to the client");
+        socket._cleanup();
+        return socket.error(err.data || err.message);
+      }
+
+      // track socket
+      self.sockets[socket.id] = socket;
+
+      // it's paramount that the internal `onconnect` logic
+      // fires before user-set events to prevent state order
+      // violations (such as a disconnection before the connection
+      // logic is complete)
+      socket.onconnect();
+      if (fn) fn();
+
+      // fire user-set events
+      self.emit('connect', socket);
+      self.emit('connection', socket);
     });
   });
   return socket;
diff --git a/lib/socket.js b/lib/socket.js
index dacaa440ca..bfdd77e856 100644
--- a/lib/socket.js
+++ b/lib/socket.js
@@ -447,7 +447,7 @@ Socket.prototype.onclose = function(reason){
   if (!this.connected) return this;
   debug('closing socket - reason %s', reason);
   this.emit('disconnecting', reason);
-  this.leaveAll();
+  this._cleanup();
   this.nsp.remove(this);
   this.client.remove(this);
   this.connected = false;
@@ -576,3 +576,8 @@ Socket.prototype.run = function(event, fn){
 
   run(0);
 };
+
+Socket.prototype._cleanup = function () {
+  this.leaveAll();
+  this.join = function noop() {};
+}
diff --git a/test/socket.io.js b/test/socket.io.js
index aa786495a0..7fe059d4a9 100644
--- a/test/socket.io.js
+++ b/test/socket.io.js
@@ -1901,6 +1901,43 @@ describe('socket.io', function(){
       });
     });
 
+    it("should leave all rooms joined after a middleware failure", (done) => {
+      const srv = http().listen(0);
+      const sio = io(srv);
+      const clientSocket = client(srv, "/");
+
+      sio.use((socket, next) => {
+        socket.join("room1");
+        next(new Error("nope"));
+      });
+
+      clientSocket.on("error", () => {
+        expect(sio.of("/").adapter.rooms).to.eql(0);
+
+        clientSocket.disconnect();
+        sio.close();
+        done();
+      });
+    });
+
+    it("should not join rooms after disconnection", (done) => {
+      const srv = http().listen(0);
+      const sio = io(srv);
+      const clientSocket = client(srv, "/");
+
+      sio.on("connection", (socket) => {
+        socket.disconnect();
+        socket.join("room1");
+      });
+
+      clientSocket.on("disconnect", () => {
+        expect(sio.of("/").adapter.rooms).to.eql(0);
+
+        sio.close();
+        done();
+      });
+    });
+
     it('should always trigger the callback (if provided) when joining a room', function(done){
       var srv = http();
       var sio = io(srv);

From baa6804440fe5dc98fcbd5249dee2f4fa6ef1b8a Mon Sep 17 00:00:00 2001
From: Damien Arrachequesne <damien.arrachequesne@gmail.com>
Date: Sun, 26 Jun 2022 09:49:21 +0200
Subject: [PATCH 59/59] chore(release): 2.5.0

Release notes: https://github.com/socketio/socket.io/releases/tag/2.5.0
Diff: https://github.com/socketio/socket.io/compare/2.4.1...2.5.0
---
 CHANGELOG.md      |   12 +
 package-lock.json | 4529 +--------------------------------------------
 package.json      |    4 +-
 3 files changed, 38 insertions(+), 4507 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8552f75af..29267b4e50 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,15 @@
+# [2.5.0](https://github.com/socketio/socket.io/compare/2.4.1...2.5.0) (2022-06-26)
+
+
+### Bug Fixes
+
+* fix race condition in dynamic namespaces ([05e1278](https://github.com/socketio/socket.io/commit/05e1278cfa99f3ecf3f8f0531ffe57d850e9a05b))
+* ignore packet received after disconnection ([22d4bdf](https://github.com/socketio/socket.io/commit/22d4bdf00d1a03885dc0171125faddfaef730066))
+* only set 'connected' to true after middleware execution ([226cc16](https://github.com/socketio/socket.io/commit/226cc16165f9fe60f16ff4d295fb91c8971cde35))
+* prevent the socket from joining a room after disconnection ([f223178](https://github.com/socketio/socket.io/commit/f223178eb655a7713303b21a78f9ef9e161d6458))
+
+
+
 ## [2.4.1](https://github.com/socketio/socket.io/compare/2.4.0...2.4.1) (2021-01-07)
 
 
diff --git a/package-lock.json b/package-lock.json
index d793935325..4a84fed5ce 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,4488 +1,8 @@
 {
   "name": "socket.io",
   "version": "2.4.1",
-  "lockfileVersion": 2,
+  "lockfileVersion": 1,
   "requires": true,
-  "packages": {
-    "": {
-      "name": "socket.io",
-      "version": "2.4.1",
-      "license": "MIT",
-      "dependencies": {
-        "debug": "~4.1.0",
-        "engine.io": "~3.6.0",
-        "has-binary2": "~1.0.2",
-        "socket.io-adapter": "~1.1.0",
-        "socket.io-client": "2.4.0",
-        "socket.io-parser": "~3.4.0"
-      },
-      "devDependencies": {
-        "expect.js": "0.3.1",
-        "mocha": "^3.5.3",
-        "nyc": "^11.2.1",
-        "superagent": "^3.8.2",
-        "supertest": "^3.0.0"
-      }
-    },
-    "node_modules/accepts": {
-      "version": "1.3.7",
-      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
-      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
-      "dependencies": {
-        "mime-types": "~2.1.24",
-        "negotiator": "0.6.2"
-      },
-      "engines": {
-        "node": ">= 0.6"
-      }
-    },
-    "node_modules/after": {
-      "version": "0.8.2",
-      "resolved": "https://registry.npmjs.org/after/-/after-0.8.2.tgz",
-      "integrity": "sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8="
-    },
-    "node_modules/arraybuffer.slice": {
-      "version": "0.0.7",
-      "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz",
-      "integrity": "sha512-wGUIVQXuehL5TCqQun8OW81jGzAWycqzFF8lFp+GOM5BXLYj3bKNsYC4daB7n6XjCqxQA/qgTJ+8ANR3acjrog=="
-    },
-    "node_modules/asynckit": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
-      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k=",
-      "dev": true
-    },
-    "node_modules/backo2": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/backo2/-/backo2-1.0.2.tgz",
-      "integrity": "sha1-MasayLEpNjRj41s+u2n038+6eUc="
-    },
-    "node_modules/balanced-match": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
-      "dev": true
-    },
-    "node_modules/base64-arraybuffer": {
-      "version": "0.1.4",
-      "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.4.tgz",
-      "integrity": "sha1-mBjHngWbE1X5fgQooBfIOOkLqBI=",
-      "engines": {
-        "node": ">= 0.6.0"
-      }
-    },
-    "node_modules/base64id": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/base64id/-/base64id-2.0.0.tgz",
-      "integrity": "sha512-lGe34o6EHj9y3Kts9R4ZYs/Gr+6N7MCaMlIFA3F1R2O5/m7K06AxfSeO5530PEERE6/WyEg3lsuyw4GHlPZHog==",
-      "engines": {
-        "node": "^4.5.0 || >= 5.9"
-      }
-    },
-    "node_modules/blob": {
-      "version": "0.0.5",
-      "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.5.tgz",
-      "integrity": "sha512-gaqbzQPqOoamawKg0LGVd7SzLgXS+JH61oWprSLH+P+abTczqJbhTR8CmJ2u9/bUYNmHTGJx/UEmn6doAvvuig=="
-    },
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+        "xmlhttprequest-ssl": "~1.6.2",
         "yeast": "0.1.2"
       },
       "dependencies": {
@@ -4674,7 +194,7 @@
         "ms": {
           "version": "2.0.0",
           "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
+          "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A=="
         }
       }
     },
@@ -4754,7 +274,7 @@
     "has-cors": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-cors/-/has-cors-1.1.0.tgz",
-      "integrity": "sha1-XkdHk/fqmEPRu5nCPu9J/xJv/zk="
+      "integrity": "sha512-g5VNKdkFuUuVCP9gYfDJHjK2nqdQJ7aDLTnycnc2+RvsOQbuLdF5pm7vuE5J76SEBIQjs4kQY/BWq74JUmjbXA=="
     },
     "he": {
       "version": "1.1.1",
@@ -4765,7 +285,7 @@
     "indexof": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/indexof/-/indexof-0.0.1.tgz",
-      "integrity": "sha1-gtwzbSMrkGIXnQWrMpOmYFn9Q10="
+      "integrity": "sha512-i0G7hLJ1z0DE8dsqJa2rycj9dBmNKgXBvotXtZYXakU9oivfB9Uj2ZBC27qqef2U58/ZLwalxa1X/RDCdkHtVg=="
     },
     "inflight": {
       "version": "1.0.6",
@@ -7691,9 +3211,9 @@
       "integrity": "sha512-WzZRUj1kUjrTIrUKpZLEzFZ1OLj5FwLlAFQs9kuZJzJi5DKdU7FsWc36SNmA8iDOtwBQyT8FkrriRM8vXLYz8g=="
     },
     "socket.io-client": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/socket.io-client/-/socket.io-client-2.4.0.tgz",
-      "integrity": "sha512-M6xhnKQHuuZd4Ba9vltCLT9oa+YvTsP8j9NcEiLElfIg8KeYPyhWOes6x4t+LTAC8enQbE/995AdTem2uNyKKQ==",
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/socket.io-client/-/socket.io-client-2.5.0.tgz",
+      "integrity": "sha512-lOO9clmdgssDykiOmVQQitwBAF3I6mYcQAo7hQ7AM6Ny5X7fp8hIJ3HcQs3Rjz4SoggoxA1OgrQyY8EgTbcPYw==",
       "requires": {
         "backo2": "1.0.2",
         "component-bind": "1.0.0",
@@ -7724,12 +3244,12 @@
         "ms": {
           "version": "2.0.0",
           "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
+          "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A=="
         },
         "socket.io-parser": {
-          "version": "3.3.1",
-          "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.3.1.tgz",
-          "integrity": "sha512-1QLvVAe8dTz+mKmZ07Swxt+LAo4Y1ff50rlyoEx00TQmDFVQYPfcqGvIDJLGaBdhdNCecXtyKpD+EgKGcmmbuQ==",
+          "version": "3.3.2",
+          "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-3.3.2.tgz",
+          "integrity": "sha512-FJvDBuOALxdCI9qwRrO/Rfp9yfndRtc1jSgVgV8FDraihmSP/MLGD5PEuJrNfjALvcQ+vMDM/33AWOYP/JSjDg==",
           "requires": {
             "component-emitter": "~1.3.0",
             "debug": "~3.1.0",
@@ -7799,7 +3319,7 @@
     "to-array": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/to-array/-/to-array-0.1.4.tgz",
-      "integrity": "sha1-F+bBH3PdTz10zaek/zI46a2b+JA="
+      "integrity": "sha512-LhVdShQD/4Mk4zXNroIQZJC+Ap3zgLcDuwEdcmLv9CCO73NWockQDwyUnW/m8VX/EElfL6FcYx7EeutN4HJA6A=="
     },
     "util-deprecate": {
       "version": "1.0.2",
@@ -7816,18 +3336,17 @@
     "ws": {
       "version": "7.4.2",
       "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.2.tgz",
-      "integrity": "sha512-T4tewALS3+qsrpGI/8dqNMLIVdq/g/85U98HPMa6F0m6xTbvhXU6RCQLqPH3+SlomNV/LdY6RXEbBpMH6EOJnA==",
-      "requires": {}
+      "integrity": "sha512-T4tewALS3+qsrpGI/8dqNMLIVdq/g/85U98HPMa6F0m6xTbvhXU6RCQLqPH3+SlomNV/LdY6RXEbBpMH6EOJnA=="
     },
     "xmlhttprequest-ssl": {
-      "version": "1.5.5",
-      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",
-      "integrity": "sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4="
+      "version": "1.6.3",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.6.3.tgz",
+      "integrity": "sha512-3XfeQE/wNkvrIktn2Kf0869fC0BN6UpydVasGIeSm2B1Llihf7/0UfZM+eCkOw3P7bP4+qPgqhm7ZoxuJtFU0Q=="
     },
     "yeast": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
-      "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk="
+      "integrity": "sha512-8HFIh676uyGYP6wP13R/j6OJ/1HwJ46snpvzE7aHAN3Ryqh2yX6Xox2B4CUmTwwOIzlG3Bs7ocsP5dZH/R1Qbg=="
     }
   }
 }
diff --git a/package.json b/package.json
index 08bc947a1b..975856394c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "socket.io",
-  "version": "2.4.1",
+  "version": "2.5.0",
   "description": "node.js realtime framework server",
   "keywords": [
     "realtime",
@@ -28,7 +28,7 @@
     "engine.io": "~3.6.0",
     "has-binary2": "~1.0.2",
     "socket.io-adapter": "~1.1.0",
-    "socket.io-client": "2.4.0",
+    "socket.io-client": "2.5.0",
     "socket.io-parser": "~3.4.0"
   },
   "devDependencies": {