On Aug 5, 6:18 pm, Josiah Carlson <[EMAIL PROTECTED]> wrote: > > Giampaolo already offered up some information, but I will offer these > two little tidbits: > In your first client, your handle_read doesn't handle the case where > you have received multiple packets at one time. That is, imagine that > in your one .read(8192), you received exactly two messages (the prefix > length and the pickle itself times two). The first pass will pick up > the message and handle the data. But unless the socket becomes > readable again, the second message will never be processed. And even > if the socket becomes readable immediately in the next select() call, > the message will be delayed depending on what other sockets are up > to. The asynchat module handles that case just fine. > > As for push() vs. send(); send() returns the number of bytes sent. If > it sends less than the total block of data (which can be the case with > large blocks of data, small TCP/IP windows over a slow connection, or > small TCP/IP buffers), you need to be aware of it and attempt to > resend the remaining. Again, the asynchat module handles that case > just fine with it's .push() method; when it returns, you know that the > data to be transferred will be transferred as long as the connection > stays alive. Without .push(), you need to implement that behavior > yourself (less boilerplate for every subclass = easier maintenance). > > (I normally don't hop on this list to comment, so please cc me on any > replies) > - Josiah >
Valuable insights. Much appreciated. Frank -- http://mail.python.org/mailman/listinfo/python-list
