Client Socket Connection to Java server

bieffe62 at bieffe62 at
Fri Jan 16 10:52:49 CET 2009

On 16 Gen, 08:10, TechieInsights <GDoerm... at> wrote:
> I am having problems with a socket connection to a Java server.  In
> java I just open the socket, pass the length and then pass the bits
> across the socket.
> I created a socket object:
> import socket
> class MySocket:
>         def __init__(self, host='localhost', port = 28192, buffsize = 1024):
>                 socket.setdefaulttimeout(10)
>        = host
>                 self.port = port
>                 self.buffsize = buffsize
>                 self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>                 self.socket.connect((host, port))
>         def send(self, data):
>                 self.socket.send(data)
>         def receive(self):
>                 return self.socket.recv(self.buffsize)
>         def sendAndReceive(self, data):
>                 self.send(data)
>                 return self.receive()
>         def close(self):
>                 self.socket.close()
> But the java server gives the error:
> WARNING: <Incoming> Message length invalid.  Discarding
> The data is of type string (xml).  Am I doing something wrong?  I know
> you have to reverse the bits when communicating from C++ to Java.
> Could this be the problem? I figured it would not because it said the
> length was invalid.  I just started looking at python sockets
> tonight... and I don't have a real deep base with socket connections
> as it is... any help would be greatly appreciated.
> Greg

What is the server protocol? What are you sending? Saying 'xml' is not
enough to understand the problem ...
byte order could be a problem only if the message include binary
of 2-bytes or 4-bytes integer. With XML this should not be the case


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