Method: WebSocket#handshake

Defined in:

lib/web/web-socket-ruby/lib/web_socket.rb

#handshake(status = nil, header = {}) ⇒ Object

# File 'lib/web/web-socket-ruby/lib/web_socket.rb', line 135

def handshake(status = nil, header = {})
  if @handshaked
    raise(WebSocket::Error, "handshake has already been done")
  end
  status ||= "101 Switching Protocols"
  def_header = {}
  case @web_socket_version
    when "hixie-75"
      def_header["WebSocket-Origin"] = self.origin
      def_header["WebSocket-Location"] = self.location
      extra_bytes = ""
    when "hixie-76"
      def_header["Sec-WebSocket-Origin"] = self.origin
      def_header["Sec-WebSocket-Location"] = self.location
      extra_bytes = hixie_76_security_digest(
        @header["Sec-WebSocket-Key1"], @header["Sec-WebSocket-Key2"], @key3)
    else
      def_header["Sec-WebSocket-Accept"] = security_digest(@header["sec-websocket-key"])
      extra_bytes = ""
  end
  header = def_header.merge(header)
  header_str = header.map(){ |k, v| "#{k}: #{v}\r\n" }.join("")
  # Note that Upgrade and Connection must appear in this order.
  write(
    "HTTP/1.1 #{status}\r\n" +
    "Upgrade: websocket\r\n" +
    "Connection: Upgrade\r\n" +
    "#{header_str}\r\n#{extra_bytes}")
  flush()
  @handshaked = true
end