[OpenSIPS-Users] Question Regarding Watchers table.

[calment]

Adrian Georgescu wrote:
> 
> The problem with using inside XCAP documents references to external  
> documents opens the can of worms of incorrect or purposely wrong  
> provisioning that can lead to loops, denial of service attacks to name  
> only a few obvious problems. If you trust a SIP UA to upload this  
> information into your presence server in a public Internet scenario,  
> it is a naive thing to do.
> 
> Secondly, the design of OpenSIPS will not allow you to fetch http  
> documents from remote server in a non-blocking way. You server will  
> get stuck when the url is not reachable quickly. The new design for  
> 2.0 will address this but it does not mean is a smart thing to do.
> 
> Though I am eager to follow standards as close as I can, getting close  
> to these OMA specs are in no way something future proof or rock solid  
> design wise. They seem to provide some answers for legitimate  
> questions, while they do this by infinitely complicating things and  
> introducing other elements that raise more questions.
> 
> If you want to go down the OMA path using Mercuro or other OMA client  
> you must go an get some OMA compliant Presence Server and XCAP server  
> instead of trying to use open source software that most of the time  
> uses pure IETF specifications and work around  for what is not or is  
> poorly specified.
> 
> Adrian
> 
Thanks for your advices. I'll make up my mind about it but for the moment I
plan to continue to investigate on those technologies. So I've to continue
testing IMS with Opensource solution for the moment.


Saúl Ibarra Corretgé wrote:
> 
> I can't give you a time estimation, but we'll get rid of the
> refreshWatchers and replace it with a PUBLISH message with xcapdiff
> payload. This message will be generated every time a document is changed
> in the OpenXCAP server. Then, presence_xcapdiff will be modified
> accordingly, to refresh the watchers when needed. 
> 
Great news ! This change really makes sense to me. Let us know when
modification occurs.

Regards
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