Re: How do you deal with lengthy server tasks?

[Guillaume Poirier-Morency <guillaumepoiriermorency gmail com>]

Le dimanche 03 février 2019 à 18:26 +0000, Biz.122 via libsoup-list a
écrit :
> Hey,
> I would like to stream some audio with soup server. How would you go
> about something like that? Each browser request will launch the
> server callback that does all processing, but I cannot stay in there
> looping and sending data. This will block any other requests.
>
> I looked around a bit and found this: 
> https://github.com/GNOME/libsoup/blob/54014b2d8a7b579b832372cb4dd22df04fefd45e/tests/context-test.c#L41
>
> Look at the "SlowData / soup_add_timeout" example.
> Is this how you would typically perform streaming tasks or large file
> transfers, and not completely locking up your server callback?

You can pause the message with soup_server_pause_message, launch the
task in background and resume it later with
soup_server_unpause_message.

To send data continuously, you can mix that with a chunked response.

   soup_message_headers_set_encoding (msg, SOUP_ENCODING_CHUNKED);
   soup_server_pause_message (msg);
   g_thread_pool_push (pool, msg, NULL);

In the thread pool (or asynchronously via the GMainLoop):

   soup_message_body_append_take (data, data_len);
   soup_server_unpause_message (msg); // deliver the chunk

   // later when done
   soup_message_complete (msg);
   soup_server_unpause_message (msg);

> Best Regards,
> Biz
>
>
> Sent with ProtonMail Secure Email.
>
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-- 
Guillaume Poirier-Morency <guillaumepoiriermorency gmail com>

Étudiant à la maîtrise en informatique à l'Université de Montréal
Chercheur à l'IRIC

Mon blog: https://arteymix.github.io/
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