Description
Describe the bug
After updating to socket.io 3.1.1 and setting allowEIO3: true, Android clients can connect as expected. However, iOS clients using Socket.IO-Client-Swift', '15.2.0' are unable to connect.
I'm getting this string on iOS: [0] String "connection closed by server. code=1000, type=protocolError"
To Reproduce
Socket.IO server version: 3.1.1
engine.io@4.1.1
Server
import { Server } from "socket.io";
const io = new Server(3000, {
allowEIO3: true
});
io.on("connection", (socket) => {
console.log(`connect ${socket.id}`);
socket.on("disconnect", () => {
console.log(`disconnect ${socket.id}`);
});
});Socket.IO client version: iOS 15.2.0
Expected behavior
iOS can connect.
Platform:
- Device: iPhone 8
- OS: iOS 14
Additional context
Android works fine.
Updating iOS to 16.0.0 works fine, but that's because it's using socket.io v3.