0
python websocketクライアント用のサンプルコードをhereから取得しましたが、以下の問題が発生しています。私が問題になっていたので、私はこのコードに場所のカップルで、元1からのビットを編集した：Python websocketオブジェクトに 'write_message'という属性がありません。
は、connectメソッドを削除し、コンストラクタにそれを吸収合併しました。私は で、「self._ws_connection」が見つかりませんでした。
WebSocketClient __init __（）メソッドを 'url'を受け入れるように変更しました。 を削除し、 ''引数を削除しました。私は '' ということを意味するのか分かりません。
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'
問題2： 私はWbSocketClientコンストラクタから '*' を削除すると、私は、問題1注記に遭遇したものとほぼ同じ、次のエラーが表示されます。私はPythonバージョン2.7.8を使用しています。
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'
クライアントコード：
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()