[Tutor] Networking

[Chris King]

  On 10/2/2010 3:40 PM, Evert Rol wrote:
>> Dear Tutors,
>>      I have attached my 2 programs for networking. It uses socket and SocketServer, but it just simplifies it even more. The problem is it won't work. The Client raises the error, (with trace back)
>> Traceback (most recent call last):
>>    File "G:\My Dropbox\My Dropbox\Chris\Not done\client.py", line 34, in<module>
>>      print client.recv()
>>    File "G:\My Dropbox\My Dropbox\Chris\Not done\client.py", line 16, in recv
>>      return self.__sock.recv(1024)
>> error: [Errno 10053] An established connection was aborted by the software in your host machine
>> The server seems to get an error of some sort, but also seems to catch and print it. It prints
>> ----------------------------------------
>> Exception happened during processing of request from ('127.0.0.1', 1424)
>> Traceback (most recent call last):
>>    File "C:\Python26\lib\SocketServer.py", line 281, in _handle_request_noblock
>>      self.process_request(request, client_address)
>>    File "C:\Python26\lib\SocketServer.py", line 307, in process_request
>>      self.finish_request(request, client_address)
>>    File "C:\Python26\lib\SocketServer.py", line 320, in finish_request
>>      self.RequestHandlerClass(request, client_address, self)
>> TypeError: 'NoneType' object is not callable
>> ----------------------------------------
>> I look at both of the documentations of socket and SocketServer, but I couldn't firgue it out. I don't know much about networking. Please Help
> I don't know much about networking, less so about it on Windows; also, I've only scanned quickly through the server script, but I notice your create_handler() function doesn't return anything. I guess it needs to return the Handler class.
> The example in the Python docs doesn't use a factory function, but instead directly puts the class as the second argument to TCPServer.
> So the second argument needs to be a class, but since your create_handler() function returns nothing, you presumably get this NoneType exception.
>
>    Evert
>
Yeah, that could be a problem. It should return the class.