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copied!<p>The answer by Larry Hastings has some great general advice about sockets, but there are a couple of mistakes as it pertains to how the <code>recv(bufsize)</code> method works in the Python socket module.</p> <p>So, to clarify, since this may be confusing to others looking to this for help:</p> <ol> <li>The bufsize param for the <code>recv(bufsize)</code> method is not optional. You'll get an error if you call <code>recv()</code> (without the param).</li> <li>The bufferlen in <code>recv(bufsize)</code> is a <em>maximum</em> size. The recv will happily return fewer bytes if there are fewer available.</li> </ol> <p>See <a href="http://docs.python.org/library/socket.html" rel="noreferrer">the documentation</a> for details.</p> <p>Now, if you're receiving data from a client and want to know when you've received all of the data, you're probably going to have to add it to your protocol -- as Larry suggests. See <a href="http://code.activestate.com/recipes/408859/" rel="noreferrer">this recipe</a> for strategies for determining end of message.</p> <p>As that recipe points out, for some protocols, the client will simply disconnect when it's done sending data. In those cases, your <code>while True</code> loop should work fine. If the client does <em>not</em> disconnect, you'll need to figure out some way to signal your content length, delimit your messages, or implement a timeout.</p> <p>I'd be happy to try to help further if you could post your exact client code and a description of your test protocol.</p>

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