def heartbeat(self):
# setup pipes
read_transport, read_proto = yield from self.loop.connect_read_pipe(
tulip.StreamProtocol, os.fdopen(self.up_read, 'rb'))
write_transport, _ = yield from self.loop.connect_write_pipe(
tulip.StreamProtocol, os.fdopen(self.down_write, 'wb'))
reader = read_proto.set_parser(websocket.WebSocketParser())
writer = websocket.WebSocketWriter(write_transport)
self.start_server(writer)
while True:
msg = yield from reader.read()
if msg is None:
print('Superviser is dead, {} stopping...'.format(os.getpid()))
self.loop.stop()
break
elif msg.tp == websocket.MSG_PING:
writer.pong()
elif msg.tp == websocket.MSG_CLOSE:
break
elif msg.tp == websocket.MSG_TEXT: # broadcast message
for wsc in self.clients:
wsc.send(msg.data.strip().encode())
read_transport.close()
write_transport.close()
def connect(self, pid, up_write, down_read):
# setup pipes
read_transport, proto = yield from self.loop.connect_read_pipe(
tulip.StreamProtocol, os.fdopen(down_read, 'rb'))
write_transport, _ = yield from self.loop.connect_write_pipe(
tulip.StreamProtocol, os.fdopen(up_write, 'wb'))
# websocket protocol
reader = proto.set_parser(websocket.WebSocketParser())
writer = websocket.WebSocketWriter(write_transport)
# store info
self.pid = pid
self.ping = time.monotonic()
self.rtransport = read_transport
self.wtransport = write_transport
self.chat_task = self.chat(reader)
self.heartbeat_task = self.heartbeat(writer)
def setUp(self):
self.transport = unittest.mock.Mock()
self.writer = websocket.WebSocketWriter(self.transport)
def start_client(loop, url):
name = input('Please enter your name: ').encode()
sec_key = base64.b64encode(os.urandom(16))
# send request
response = yield from tulip.http.request('get',
url,
headers={
'UPGRADE':
'WebSocket',
'CONNECTION':
'Upgrade',
'SEC-WEBSOCKET-VERSION':
'13',
'SEC-WEBSOCKET-KEY':
sec_key.decode(),
},
timeout=1.0)
# websocket handshake
if response.status != 101:
raise ValueError("Handshake error: Invalid response status")
if response.get('upgrade', '').lower() != 'websocket':
raise ValueError("Handshake error - Invalid upgrade header")
if response.get('connection', '').lower() != 'upgrade':
raise ValueError("Handshake error - Invalid connection header")
key = response.get('sec-websocket-accept', '').encode()
match = base64.b64encode(hashlib.sha1(sec_key + WS_KEY).digest())
if key != match:
raise ValueError("Handshake error - Invalid challenge response")
# switch to websocket protocol
stream = response.stream.set_parser(websocket.WebSocketParser())
writer = websocket.WebSocketWriter(response.transport)
# input reader
def stdin_callback():
line = sys.stdin.buffer.readline()
if not line:
loop.stop()
else:
writer.send(name + b': ' + line)
loop.add_reader(sys.stdin.fileno(), stdin_callback)
@tulip.coroutine
def dispatch():
while True:
msg = yield from stream.read()
if msg is None:
break
elif msg.tp == websocket.MSG_PING:
writer.pong()
elif msg.tp == websocket.MSG_TEXT:
print(msg.data.strip())
elif msg.tp == websocket.MSG_CLOSE:
break
yield from dispatch()