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Handler for XMPP Ping request
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Govardhan N 2018-03-21, 12:00 #1
Member since Mar 2018 · 10 posts
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Subject: Handler for XMPP Ping request
Hi Alex,

I'm trying to implement ping request handler specified in this link : https://matrix-xmpp.io/docs/handlers

When i create pipeline initializer as it is in the above link, I'm getting error for the below line of code:

  1. pipeline.AddBefore<XmppStanzaHandler>(new XmppPingHandler<Iq>());

The error is,
Severity    Code    Description    Project    File    Line    Suppression State
Error    CS0308    The non-generic method 'IChannelPipeline.AddBefore(string, string, IChannelHandler)' cannot be used with type arguments


Can you help me resolving this error..? Also can you provide me sample code that works in ,Net standard project.. ;-)
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Alex 2018-03-21, 12:05 #2
Member since Feb 2003 · 4449 posts · Location: Germany
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MatriX vNext has already a Ping handler build in.
See:
https://github.com/matrix-xmpp/matrix-vnext/blob/master/sr…

This handler is active by default. Matrix should reply autopmatcially to all ping requests.
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Govardhan N 2018-03-22, 05:50 #3
Member since Mar 2018 · 10 posts
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Thanks for your reply Alex.

If the handler is active, do we need to define following snippet in our code..?

  1. var pipelineInitializerAction = new Action<IChannelPipeline>(pipeline =>
  2. {
  3.     pipeline.AddBefore<XmppStanzaHandler>(new XmppPingHandler());
  4. });
  5.  
  6. var xmppClient = new XmppClient(pipelineInitializerAction);
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Alex 2018-03-22, 10:07 #4
Member since Feb 2003 · 4449 posts · Location: Germany
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No, MatriX is doing this all already for you.

We will add a note to the tutorial that the sample code is a handler which already exists. Or we will write up another sample handler which does not exist already in MatriX.
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Govardhan N 2018-03-22, 11:33 #5
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Ok thanks Alex.

We changed mod_ping option, timeout_action,kill to timeout_action,none. Now user will stay online until the app is killed forcefully.

Is it the correct way of changing the mod_ping option or will it cause any issue in the future..?
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Alex 2018-03-22, 11:58 #6
Member since Feb 2003 · 4449 posts · Location: Germany
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This change in ejabberd seems to be only a workaround to me, not a real solution.
When the server kills your connections then something is wrong with your replies to the pings.

Check your logs for ping requests and replies to them.
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