[Icecast] Check feed connected, active - IceCast 2.4.x

[Philipp Schafft]

reflum,

On Sun, 2015-04-12 at 23:50 +0000, Dean Sauer wrote:
> On Sat, 11 Apr 2015 07:03:16 +0000, Philipp Schafft wrote:
> 
> > You can request /admin/stats.xml. That file will return the overall
> > server status including per source information. If the server returns
> > 200 with the expected XML document the server is up and running.
> 
> Thanks, my pseudo code already determined that and the underlying issue.
> 
> If I query the server on port 8000 and get 200, then its up/running...
> 
> Now the sources...
> 
> 
> > You can
> > look at the <source> tags to find out if the sources are connected.
> 
> Thanks, but no I am not scraping/parsing that. I despise the whole 
> concept of "scraping" sites like this, there is already one piece of 
> software doing this as it is in my arena.

I think you misunderstood me.

the admin/stats.xml file *is* the API interface. It's for usage such as
yours. within /admin: stuff ending with .xsl is for non-API, stuff with
no dot in the name or ending in .xml are for API usage.

What you will get is a well formed XML document. Have a look at it!


> doing  a:
> 
> urllib.urlopen("http://domain/source").getcode()
> 
> just returns a 200 even if the actual source is down, and the source is 
> on a fall back. If I were following http expectations I should get 302, 
> temp redirection as used widely, or 307 if you stick to the strict 
> standard.

No. I think you are misunderstanding the standard here:
Icecast is *not* refusing to serve the resource. So it MUST return a
2xx-status code. The fallback isn't happening in the protocol layer.
(This is because there are no mid-of-stream redirects on HTTP. So
redirects (3xx) can't work for users already connected.)


> Sadly right now the simple check that IceCast is UP will have to suffice, 
> and covers the main problem, right now.

Again, see my hints on the admin/stats.xml file. It contains all the
data you want.

-- 
Philipp.
 (Rah of PH2)
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