Reading problem at some (kind of random) point with QTcpSocket

[tuxiko]

I'm not sure I understand you correctly as I always wait for "nextBlockSize". Here is the simplified server code and below I show the results of my tests. It seems a weird exception is raised.

...
    while self.socket.state() == QAbstractSocket.ConnectedState:
 
            self.nextBlockSize = 0
 
            while self.socket.bytesAvailable() < SIZEOF_UINT16:
                self.socket.waitForReadyRead(-1)
 
            print("Bytes available: %d" % self.socket.bytesAvailable())
            self.nextBlockSize = stream.readUInt16()
 
            if self.nextBlockSize == 0:
                print("GameServer: Problem with QTcpSocket?!\n"
                      "QDataStream status(): %d" % stream.status())
                return
 
            while self.socket.bytesAvailable() < self.nextBlockSize:
                self.socket.waitForReadyRead(-1)
 
            print("BlockSize: %d" % self.nextBlockSize)
...

...
    while self.socket.state() == QAbstractSocket.ConnectedState:

            self.nextBlockSize = 0

            while self.socket.bytesAvailable() < SIZEOF_UINT16:
                self.socket.waitForReadyRead(-1)

            print("Bytes available: %d" % self.socket.bytesAvailable())
            self.nextBlockSize = stream.readUInt16()

            if self.nextBlockSize == 0:
                print("GameServer: Problem with QTcpSocket?!\n"
                      "QDataStream status(): %d" % stream.status())
                return

            while self.socket.bytesAvailable() < self.nextBlockSize:
                self.socket.waitForReadyRead(-1)

            print("BlockSize: %d" % self.nextBlockSize)
...

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I also print at the client side what it sends (it is represented below by the byte arrays and the lines "SIZE: x" -- in red color).
The printed lines on the console are:

...
b'\x00\x14\x00\x00\x00@\x00\x00\x96\x9d\x05w\xd2\x 90\x00\x00\x03\x84\x00\x00\x01\x9f'
b'\x00\x14\x00\x00\x00@\x00\x00\x96\x9d\x05w\xd2\x 90\x00\x00\x03(\x00\x00\x01\xc7'
SIZE: 22
SIZE: 22
Bytes available: 44
BlockSize: 20
Bytes available: 22
BlockSize: 20
b'\x00\x14\x00\x00\x00@\x00\x00\x96\x9d\x05w\xd2\x 90\x00\x00\x02\xd6\x00\x00\x01\xea'
b'\x00\x14\x00\x00\x00@\x00\x00\x96\x9d\x05w\xd2\x 90\x00\x00\x02\x88\x00\x00\x02\x03'
SIZE: 22
Bytes available: 44
BlockSize: 20
Bytes available: 22
BlockSize: 20
b'\x00\x14\x00\x00\x00@\x00\x00\x96\x9d\x05w\xd2\x 90\x00\x00\x02=\x00\x00\x02\x1c'
Bytes available: 22
BlockSize: 20
SIZE: 22
b'\x00\x14\x00\x00\x00@\x00\x00\x96\x9d\x05w\xd2\x 90\x00\x00\x01\xe1\x00\x00\x02"'
Bytes available: 22
BlockSize: 20
SIZE: 22
b'\x00\x14\x00\x00\x00@\x00\x00\x96\x9d\x05w\xd2\x 90\x00\x00\x01\xc1\x00\x00\x01\xcd'
Bytes available: 22
GameServer: Problem with QTcpSocket?!
QDataStream status(): 1

(Note that the "SIZE:" lines are printed by the client GUI-thread whereas the byte arrays are printed by an independent client thread)

So at the end it seems that I have read past the end of the stream (status == 1), but my code seems correct.
However I just have caught this exception :

------------
Error in sys.excepthook:
TypeError: 'NoneType' object is not callable

Original exception was:
Traceback (most recent call last):
File "/home/tuxico/Projets/PyMagic-git/pm_gameserver.py", line 92, in run
TypeError: unorderable types: int() < NoneType()
------------

and the faulting line is in the code above:

while self.socket.bytesAvailable() < SIZEOF_UINT16:

while self.socket.bytesAvailable() < SIZEOF_UINT16:

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What does it means?

Thanks for all your patience.