[mod_python] TimeOut and mp_conn.read (pywebsocket)
Bram Van Steenlandt
bram at diomedia.be
Mon Nov 3 19:07:00 UTC 2014
The connection remains open for many hours at a time.
it's something like:
msg = request.ws_stream.receive_message()
do other stuff, the client has asked something, maybe send a
json string to the client, maybe send a command to another program
Thx for your input
op 03-11-14 19:26, Grisha Trubetskoy schreef:
> That seems weird... I'd look for other causes for this - e.g. use
> something like tcpdump to see whether the TCP connection is closed
> from either end when it returns?
> On Mon, Nov 3, 2014 at 11:32 AM, Bram Van Steenlandt <bram at diomedia.be
> <mailto:bram at diomedia.be>> wrote:
> Hi Grisha,
> ws_stream is the websocket part created by pywebsocket.
> In the pywebsocket code it looks like this (_stream_hixie75.py):
> while True:
> # Read 1 byte.
> # mp_conn.read will block if no bytes are available.
> # Timeout is controlled by TimeOut directive of Apache.
> frame_type_str = self.receive_bytes(1)
> self.receive_bytes seems to use:
> read_bytes = self._request.connection.read(length)
> Which seems to be:
> Reads at most /length/ bytes from the client. The read blocks
> indefinitely until there is at least one byte to read. If
> length is -1, keep reading until the socket is closed from the
> other end (This is known as EXHAUSTIVE mode in the http server
> but Timeout is 60 in apache and the function returns after 1
> second if there are no bytes to receive.
> op 03-11-14 16:59, Grisha Trubetskoy schreef:
>> What is ws_stream?
>> On Mon, Nov 3, 2014 at 9:24 AM, Bram Van Steenlandt
>> <bram at diomedia.be <mailto:bram at diomedia.be>> wrote:
>> Hi all,
>> I've developed a websocket application using mod_python and
>> It works but I have a problem (I'm using apache22 and
>> mod_python 3.3.1
>> and python 2.6.6).
>> I'm using request.ws_stream.receive_message() to see if there are
>> messages from the client,
>> this works but always takes one second (between 0.99 and
>> 1.05), I need
>> it to return faster (esp. when there is no message most of
>> the time).
>> This is suppose to be controlled by the TimeOut config value
>> in apache
>> but this is set to 60... (req.server.timeout is also 60)
>> I would think that the function returns after 60 seconds and
>> not 1 when
>> there is no data, is there another timeout I'm missing ?
>> Can someone point me in the right direction ?
>> I there a way to set this from inside handler like with
>> regular sockets ?
>> The pywebsocket package does include a way to work with a
>> messagereceiver (here receiving is done in a thread),
>> this works but it's difficult to debug, I think I would
>> prefer a shorter
>> mod_python mailing list
>> mod_python at modpython.org <mailto:mod_python at modpython.org>
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