[python] Python socket receive - incoming packets always have a different size

Note that exact reason why your code is frozen is not because you set too high request.recv() buffer size. Here is explained What means buffer size in socket.recv(buffer_size)

This code will work until it'll receive an empty TCP message (if you'd print this empty message, it'd show b''):

while True:    
  data = self.request.recv(1024)
  if not data: break

And note, that there is no way to send empty TCP message. socket.send(b'') simply won't work.

Why? Because empty message is sent only when you type socket.close(), so your script will loop as long as you won't close your connection. As Hans L pointed out here are some good methods to end message.

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