def connect(self, serv_addr):
"""
Override connect to implement websocket handshake.
"""
Connection.connect(self, serv_addr)
# WebSocket Handshake
request_headers = messages.make_ws_request_headers(serv_addr)
self._ws_key = request_headers["sec-websocket-key"]
request_data = messages.make_http_request('GET', '/',
headers=request_headers)
self._sock.send(request_data)
data = self._sock.recv(1024)
msg, data = messages.http_parse(data)
if msg == None:
self._sock.close()
self._sock = None
self._is_connected = False
return
response_headers, body = msg
# Verify handshake response
verified = messages.verify_ws_response_headers(self._ws_key,
response_headers)
if verified:
self._is_connected = True
else:
self._is_connected = False
self._sock.close()
self._sock = None
return self._is_connected
def _wait_response(self, sock, wait=1.0):
"""
Wait maximum delta seconds for a single http response on socket
This is run by a thread.
"""
try:
timeout = time.time() + wait
recv_data = ''
while not self._stop_event.is_set():
remaining = min(timeout-time.time(), 1.0)
if remaining <= 0:
break
r,w,e = select.select([sock], [], [sock], remaining)
if sock in r:
data = sock.recv(1024)
if data:
recv_data += data
payload, recv_data = messages.http_parse(recv_data)
if payload:
# completely read
return payload
else:
# not completely read yet
continue
else:
# readable yet no data
print "hello"
break
elif sock in e:
print "errro"
else:
# not readable yet (early timeout)
continue
except (select.error, socket.error) as e:
traceback.print_exc()
finally:
sock.close()