파이썬 websocket 클라이언트 용 샘플 코드를 here에서 얻었습니다. 아래 문제점이 있습니다. 이 코드를 내가 문제로 점점 이후 장소의 몇 원래에서 조금 편집 :Python websocket 객체에 'write_message'오류가 없습니다.
connect 메소드를 제거하고 생성자를 합병했다. 나는 을 받고 'self._ws_connection'문제를 찾을 수 없습니다.
WebSocketClient __init __() 메서드를 'url'을 허용하도록 변경했으며 인수를 삭제하고 ''인수를 제거했습니다. ''의 의미가 무엇인지 모르겠습니다. 을 의미합니다.
Problem1 :
Traceback (most recent call last):
File "websocketcli.py", line 138, in <module>
main()
File "websocketcli.py", line 129, in main
client.send('Hello world!')
File "websocketcli.py", line 49, in send
self._ws_connection.write_message(escape.utf8(json.dumps(data)))
File "https://stackoverflow.com/users/anjangam/pyvenv/venv/lib/python2.7/site-packages/tornado/websocket.py", line 970, in write_message
return self.protocol.write_message(message, binary)
AttributeError: 'NoneType' object has no attribute 'write_message'
문제 2 : 내가 제거하면 '*'는 WbSocketClient 생성자에서, 나는 다음과 같은 오류가 발생, 문제는 1 주에서 발견 된 것과 거의 동일 : 파이썬 2.7.8 버전을 사용하고 있습니다.
Traceback (most recent call last):
File "websocketcli.py", line 138, in <module>
main()
File "websocketcli.py", line 129, in main
client.send('Hello world!')
File "websocketcli.py", line 52, in send
self._ws_connection.write_message(escape.utf8(json.dumps(data)))
File "https://stackoverflow.com/users/anjangam/pyvenv/venv/lib/python2.7/site-packages/tornado/websocket.py", line 970, in write_message
return self.protocol.write_message(message, binary)
AttributeError: 'NoneType' object has no attribute 'write_message'
클라이언트 코드 :
from tornado import escape
from tornado import gen
from tornado import httpclient
from tornado import httputil
from tornado import ioloop
from tornado import websocket
import functools
import json
import time
APPLICATION_JSON = 'application/json'
DEFAULT_CONNECT_TIMEOUT = 60
DEFAULT_REQUEST_TIMEOUT = 60
class WebSocketClient():
"""Base for web socket clients.
"""
def __init__(self, connect_timeout=DEFAULT_CONNECT_TIMEOUT,
request_timeout=DEFAULT_REQUEST_TIMEOUT):
self.connect_timeout = connect_timeout
self.request_timeout = request_timeout
def connect(self, url):
"""Connect to the server.
:param str url: server URL.
"""
headers = httputil.HTTPHeaders({'Content-Type': APPLICATION_JSON})
request = httpclient.HTTPRequest(url=url,
connect_timeout=self.connect_timeout,
request_timeout=self.request_timeout,
headers=headers)
self._ws_connection = websocket.WebSocketClientConnection(ioloop.IOLoop.current(),
request)
self._ws_connection.connect_future.add_done_callback(self._connect_callback)
print 'Connection: ', self._ws_connection
def send(self, data):
"""Send message to the server
:param str data: message.
"""
if not self._ws_connection:
raise RuntimeError('Web socket connection is closed.')
self._ws_connection.write_message(escape.utf8(json.dumps(data)))
def close(self):
"""Close connection.
"""
if not self._ws_connection:
raise RuntimeError('Web socket connection is already closed.')
self._ws_connection.close()
def _connect_callback(self, future):
if future.exception() is None:
self._ws_connection = future.result()
self._on_connection_success()
self._read_messages()
else:
self._on_connection_error(future.exception())
@gen.coroutine
def _read_messages(self):
while True:
msg = yield self._ws_connection.read_message()
if msg is None:
self._on_connection_close()
break
self._on_message(msg)
def _on_message(self, msg):
"""This is called when new message is available from the server.
:param str msg: server message.
"""
pass
def _on_connection_success(self):
"""This is called on successful connection ot the server.
"""
pass
def _on_connection_close(self):
"""This is called when server closed the connection.
"""
pass
def _on_connection_error(self, exception):
"""This is called in case if connection to the server could
not established.
"""
pass
class TestWebSocketClient(WebSocketClient):
def __init__(self, url):
WebSocketClient.__init__(self, url)
def _on_message(self, msg):
print(msg)
deadline = time.time() + 1
ioloop.IOLoop().instance().add_timeout(
deadline, functools.partial(self.send, str(int(time.time()))))
def _on_connection_success(self):
print('Connected!')
self.send(str(int(time.time())))
def _on_connection_close(self):
print('Connection closed!')
def _on_connection_error(self, exception):
print('Connection error: %s', exception)
def main():
client = TestWebSocketClient()
client.connect('ws://localhost:8888/ws')
client.send('Hello world!')
try:
ioloop.IOLoop.instance().start()
except KeyboardInterrupt:
client.close()
if __name__ == '__main__':
main()