Threaded WebSocket client always exits randomly

[muellermartin]

I tried to implement a simple WebSocket client for a CherryPy server which should work like the droid_sensor.py and its server under "example", but if I try to run the client it always stops randomly in the send loop and exits with a random WebSocket error code (one of 1002, 1006 and 1007).

This is the server log from the CherryPy server:

127.0.0.1 - - [18/Feb/2013:02:49:54] "GET /ws HTTP/1.1" 101 - "" ""
[18/Feb/2013:02:49:54]  Managing WebSocket connection from 127.0.0.1:55280
[18/Feb/2013:02:49:54]  Managing WebSocket connection from 127.0.0.1:55280
Exception in thread WebSocket client at 127.0.0.1:55280:
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 552, in __bootstrap_inner
    self.run()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 505, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/Users/martin/Desktop/test/ENV/lib/python2.7/site-packages/ws4py/websocket.py", line 246, in run
    self._cleanup()
  File "/Users/martin/Desktop/test/ENV/lib/python2.7/site-packages/ws4py/websocket.py", line 197, in _cleanup
    self.stream._cleanup()
AttributeError: 'NoneType' object has no attribute '_cleanup'

[18/Feb/2013:02:49:55]  Removing WebSocket connection 127.0.0.1:55280
[18/Feb/2013:02:49:55]  Removing WebSocket connection 127.0.0.1:55280

This is my client (very similar to example/droid_sensor.py):
https://gist.github.com/muellermartin/4974648

and this is the server:
https://gist.github.com/muellermartin/4974657

P.S.: The host in line https://github.com/Lawouach/WebSocket-for-Python/blob/master/example/droid_sensor.py#L98 seems to be wrong (script crashes with ValueError: Invalid scheme: http) - shouldn't this be "ws://127.0.0.1:9000/ws"?

[Lawouach]

Would you mind telling me which ws4py version you're running please?

As for the droid example, I must admit that's one piece I haven't maintained well so if it's failing I'm not entirely surprised.

[muellermartin]

Of course, here are the versions I use:
ws4py 0.2.4
CherryPy 3.2.2
Python 2.7.2

[Lawouach]

Okay. May I ask you if you could try with the latest HEAD (0.3.0-beta) please? I've made some modifications that could help (or not ;)).

[muellermartin]

That was a good idea: It seems to work now as expected!

Edit: Despite the fact that the client is working, the server displays this error immediately after the client is started:

127.0.0.1 - - [18/Feb/2013:11:29:52] "GET /ws HTTP/1.1" 101 - "" ""
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 552, in __bootstrap_inner
    self.run()
  File "build/bdist.macosx-10.8-intel/egg/ws4py/manager.py", line 255, in run
    if not ws.once():
  File "build/bdist.macosx-10.8-intel/egg/ws4py/websocket.py", line 295, in once
    if not process(b):
  File "build/bdist.macosx-10.8-intel/egg/ws4py/websocket.py", line 368, in process
    s.message.data = None
AttributeError: 'NoneType' object has no attribute 'data'

[Lawouach]

Damned! :)

I'll probably need to test it out but that won't be before this evening at best. Sorry.

[muellermartin]

I mean the client is running and the server keeps running too, except this exception appears in the server log as soon the client connects, so take your time ;) Thanks anyway sofar!