[ejabberd] Ejabberd Chat - disappearing chat messages

darthtina ca_arsenault at yahoo.com
Mon Nov 9 20:17:48 MSK 2009


Thanks Konstantin!




Konstantin Khomoutov wrote:
> 
> On Sat, 31 Oct 2009 09:21:50 -0700 (PDT)
> darthtina <ca_arsenault at yahoo.com> wrote:
> 
>>  I've searched around, but I'm new to ejabberd and I have a big issue.
>> (client in strophe on redhat) Our chat is running fine except when
>> someone
>> has an intermittent internet connection.  The logs show that they leave
>> and
>> join and leave and join:
>> 
>> [22:14:07] user-427-chat-42606 leaves the room: Replaced by new
>> connection
>> [22:14:23] user-427-chat-42606 joins the room
>> [22:14:23] user-427-chat-42606 has set the subject to:
>> user_427 at test....com
>> [22:14:33] user-427-chat-42606 leaves the room: Replaced by new
>> connection
>> [22:14:48] user-427-chat-42606 joins the room
>> [22:14:48] user-427-chat-42606 has set the subject to:
>> user_427 at test.....com
>> 
>> While this going on user's not getting any messages sent or received
>> while
>> the other person in the chat is sending messages.  There has got to be a
>> way, to have it setup that when the new connection is made that the
>> messages
>> are checked and synced with the server.  Please help, through me some
>> bread
>> crumbs, anything! :)
> 
> Support for reliable delivery of messages in XMPP is next to nonexistent.
> But in the case of multi-user chat you could possibly exploit one of its
> features -- maintaining of history.
> Your client should request certain amount of history each time it joins
> the room and decide which messages it had already seen and which it
> hadn't.
> This will not be 100% bullet-proof, but close provided the droupouts of
> that client's connections don't last too long and the traffic in the room
> is not too heavy.
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> 
> 

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