Module: Async::WebSocket::Adapters::HTTP

Includes:
Protocol::WebSocket::Headers
Defined in:
lib/async/websocket/adapters/http.rb

Class Method Summary collapse

Class Method Details

.open(request, headers: [], protocols: [], handler: Connection, extensions: ::Protocol::WebSocket::Extensions::Server.default, **options, &block) ⇒ Object 



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# File 'lib/async/websocket/adapters/http.rb', line 22

def self.open(request, headers: [], protocols: [], handler: Connection, extensions: ::Protocol::WebSocket::Extensions::Server.default, **options, &block)
  if websocket?(request)
    headers = Protocol::HTTP::Headers[headers]
    
    # Select websocket sub-protocol:
    if requested_protocol = request.headers[SEC_WEBSOCKET_PROTOCOL]
      protocol = (requested_protocol & protocols).first
    end
    
    if extensions and extension_headers = request.headers[SEC_WEBSOCKET_EXTENSIONS]
      extensions.accept(extension_headers) do |header|
        headers.add(SEC_WEBSOCKET_EXTENSIONS, header.join(";"))
      end
    end
    
    response = Response.for(request, headers, protocol: protocol, **options) do |stream|
      framer = Protocol::WebSocket::Framer.new(stream)
      connection = handler.call(framer, protocol, extensions)
      
      yield connection
    ensure
      connection&.close
      stream.close
    end
    
    # Once we get to this point, we no longer need to hold on to the request:
    request = nil
    
    return response
  end
end

.websocket?(request) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/async/websocket/adapters/http.rb', line 18

def self.websocket?(request)
  Array(request.protocol).any? { |e| e.casecmp?(PROTOCOL) }
end