Module: EventMachine::WebSocket::Handshake04

Included in:
Handler05, Handler06, Handler07, Handler08
Defined in:
lib/em-websocket/handshake04.rb

Instance Method Summary collapse

Instance Method Details

#handshake ⇒ Object 



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# File 'lib/em-websocket/handshake04.rb', line 7

def handshake
  # Required
  unless key = request['sec-websocket-key']
    raise HandshakeError, "Sec-WebSocket-Key header is required"
  end
  
  # Optional
  origin = request['sec-websocket-origin']
  protocols = request['sec-websocket-protocol']
  extensions = request['sec-websocket-extensions']
  
  string_to_sign = "#{key}258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
  signature = Base64.encode64(Digest::SHA1.digest(string_to_sign)).chomp
  
  upgrade = ["HTTP/1.1 101 Switching Protocols"]
  upgrade << "Upgrade: websocket"
  upgrade << "Connection: Upgrade"
  upgrade << "Sec-WebSocket-Accept: #{signature}"
  
  # TODO: Support Sec-WebSocket-Protocol
  # TODO: Sec-WebSocket-Extensions
  
  debug [:upgrade_headers, upgrade]
  
  return upgrade.join("\r\n") + "\r\n\r\n"
end