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| 1 | +# frozen_string_literals: true |
| 2 | +# |
| 3 | +# Copyright, 2019, by Samuel G. D. Williams. <http://www.codeotaku.com> |
| 4 | +# |
| 5 | +# Permission is hereby granted, free of charge, to any person obtaining a copy |
| 6 | +# of this software and associated documentation files (the "Software"), to deal |
| 7 | +# in the Software without restriction, including without limitation the rights |
| 8 | +# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 9 | +# copies of the Software, and to permit persons to whom the Software is |
| 10 | +# furnished to do so, subject to the following conditions: |
| 11 | +# |
| 12 | +# The above copyright notice and this permission notice shall be included in |
| 13 | +# all copies or substantial portions of the Software. |
| 14 | +# |
| 15 | +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 18 | +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | +# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 21 | +# THE SOFTWARE. |
| 22 | + |
| 23 | +require_relative '../connection' |
| 24 | +require_relative '../response' |
| 25 | + |
| 26 | +module Async |
| 27 | + module WebSocket |
| 28 | + module Adapters |
| 29 | + module HTTP |
| 30 | + include ::Protocol::WebSocket::Headers |
| 31 | + |
| 32 | + def self.websocket?(request) |
| 33 | + Array(request.protocol).include?(PROTOCOL) |
| 34 | + end |
| 35 | + |
| 36 | + def self.open(request, headers: [], protocols: [], handler: Connection, **options, &block) |
| 37 | + if Array(request.protocol).include?(PROTOCOL) |
| 38 | + # Select websocket sub-protocol: |
| 39 | + if requested_protocol = request.headers[SEC_WEBSOCKET_PROTOCOL] |
| 40 | + protocol = (requested_protocol & protocols).first |
| 41 | + end |
| 42 | + |
| 43 | + response = Response.for(request, headers, protocol: protocol, **options) do |stream| |
| 44 | + # Once we get to this point, we no longer need to hold on to the response: |
| 45 | + response = nil |
| 46 | + |
| 47 | + framer = Protocol::WebSocket::Framer.new(stream) |
| 48 | + connection = handler.call(framer, protocol) |
| 49 | + |
| 50 | + yield connection |
| 51 | + |
| 52 | + connection.close unless connection.closed? |
| 53 | + end |
| 54 | + |
| 55 | + # Once we get to this point, we no longer need to hold on to the request: |
| 56 | + request = nil |
| 57 | + |
| 58 | + return response |
| 59 | + end |
| 60 | + end |
| 61 | + end |
| 62 | + end |
| 63 | + end |
| 64 | +end |
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