I'm building a highly dynamic streaming system using Liquidsoap, so that
the sources are built and populated with requests dynamically. The app
(written in Django) needs to receive a notification when the a new track
starts playing. So what I did is add a callback URL as metadata on the
request and then do http.get on this URL as follows:
callback_timeout=5.0
def track_notification(m) =
callback_url = m["callback_url"]
if string.length(callback_url) > 0 then
print("Callback to #{callback_url}")
ignore(http.get(timeout=callback_timeout,callback_url))
end
end
and when I build the source I call on_track to attach track_notification as
a callback. This all works unless liquidsoap doesn't like the url, in which
case it exits with the following in the logs:
2012/05/18 16:18:28 [clock.wallclock_main:2] Source blah failed while
streaming: Failure("Invalid URL.")!
2012/05/18 16:18:28 [clock.wallclock_main:3] Raised at file "pervasives.ml",
line 22, characters 22-33
2012/05/18 16:18:28 [clock.wallclock_main:3] Called from file "list.ml",
line 57, characters 20-23
2012/05/18 16:18:28 [blah:3] Closing connection...
2012/05/18 16:18:28 [blah_q:3] Finished with "myfile.mp3".
2012/05/18 16:18:28 [clock.wallclock_main:3] Streaming loop stopped.
2012/05/18 16:18:28 [main:3] Shutdown started!
2012/05/18 16:18:28 [threads:3] Thread "wallclock_main" terminated (0
remaining).
2012/05/18 16:18:28 [main:3] Waiting for threads to terminate...
2012/05/18 16:18:28 [main:3] Cleaning downloaded files...
2012/05/18 16:18:28 >>> LOG END
Have I misunderstood something, or is there a better way to do this?
Thanks
Chris
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