def connect(self, serv_addr):
"""Connect to server"""
sock = connect(serv_addr)
# HTTP Handshake
request_data = messages.make_http_request('GET', '/createsession')
data = ''
success = True
try:
sock.send(request_data)
payload = self._wait_response(sock, wait=2.0)
if not payload:
success = False
else:
response_headers, body = payload
if response_headers['code'] != 200:
success = False
else:
msg = json.loads(body)
self._worker_addr= (serv_addr[0], msg['port'])
self._sid = msg['sid']
self._longpoll()
return success
except socket.error as e:
return False
finally:
sock.close()
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 _do_request(self, op, msg=None):
if op not in ['op', 'lp']:
return False
if not msg:
msg = {}
msg['op'] = op
msg['sid'] = self._sid
path = '/?data=' + urllib.quote(json.dumps(msg))
http_request = messages.make_http_request('GET', path)
try:
sock = connect(self._worker_addr)
sock.send(http_request)
if op == 'op':
f = lambda : self._wait_op(sock)
else:
self._lp_sock = sock
f = lambda : self._wait_lp(sock)
t = threading.Thread(target=f)
t.setDaemon(True)
t.start()
except:
traceback.exc()
return False
return True