# Generate a handshake response
	private fun handshake_response(heads: Map[String,String]): String
	do
		var resp_map = new HashMap[String,String]
		resp_map["HTTP/1.1"] = "101 Switching Protocols"
		resp_map["Upgrade:"] = "websocket"
		resp_map["Connection:"] = "Upgrade"
		var key = heads["Sec-WebSocket-Key"]
		key += "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
		key = key.sha1.encode_base64.to_s
		resp_map["Sec-WebSocket-Accept:"] = key
		var resp = resp_map.join("\r\n", " ")
		resp += "\r\n\r\n"
		return resp
	end