The first thing I'd try is forget about libraries and try to understand what's happening in the context of a subscriber exactly. It should be really really straightforward to build a script that handles all this together.
A subscriber application must do 2 things :
- Acknowledge the susbcription : the hub will verify the intent of the susbcriber. It's a GET request
- Deal with incoming pings. It's a POST request.
So let's start :
- Put a script somewhere on the web (it must be accessible from behind a firewall) which must be bale to handle to GET requests from the hub. Make sure it only echoes the
hub.challengeparam that it gets in the response's body and returns 200. - Send the following from your command line :
curl -X POST http://pubsubhubbub.appspot.com/ -d'hub.mode=subscribe' -d'hub.verify=sync' -d'hub.topic=http://the.feed.url' -d'hub.callback=http://the.script.url' -D- - You should see an incoming verification request on the script. Ideally (if you followed step 1, it should echo the hub.challenge and return a 200.
If this was all fine the curl request that you send should tell you that the hub returned a 204. If you get anything else, check the body of the response, it will indicate you what went wrong.
Later...
- Your script will get a POST request. This is a notification of new content!
- Parse the raw body (XML) of this POST request, it contains the feed, only with the new entries.
- Do whatever needs to be done with the parsed content (save into a database... etc).
I hope this helps. You can also use this tool to debug your subscription of you need help.