Re: INFO Framework - one pakage per INFO

Pete Cordell wrote:
> Alternatively you could say that 200 OK meant that the application had 
> accepted, but not necessarily processed it.  As part of accepting a 
> message, the application could sanity check it.  That would allow things 
> like malformed messages and other such lower layer machinery to be 
> handled in a common way.  Otherwise you presumably have to define how 
> malformed messages, and a whole bunch of other error conditions, are 
> handled for every single INFO package.  It also allows the application 
> the option to process the message then and there, which will likely 
> simplify a lot of INFO exchanges, especially if INFO is allowed a 
> response body.

I think the distinction drawn here can be signaled using 200 or 202.
If the body has been parsed and is known to be valid return 200, whether 
it has been acted upon or not. If it has not been verified to have valid 
syntax, return 202.

	Thanks,
	Paul


> Regards,
> 
> Pete.
> -- 
> =============================================
> Pete Cordell
> Codalogic Ltd
> =============================================
> 
> ----- Original Message ----- From: "Christer Holmberg" 
> <[email protected]>
> To: "Hadriel Kaplan" <[email protected]>; "DRAGE, Keith (Keith)" 
> <[email protected]>; "Elwell, John" <[email protected]>; 
> "Paul Kyzivat" <[email protected]>
> Cc: "SIP List" <[email protected]>
> Sent: Tuesday, December 09, 2008 10:44 AM
> Subject: Re: [Sip] INFO Framework - one pakage per INFO
> 
> 
>>
>>
>> Hi,
>>
>> Let's assume that it will take some time to process the body content -
>> and may then figure out that something is wrong with it.
>>
>> But, on SIP level everything went fine, so you should send 200 (OK) for
>> the INFO, and not wait for the application to process the body content
>> first.
>>
>> Then, if the application finds out that something is wrong (on an
>> application level) with the body content, it should send a separate INFO
>> to indicate that.
>>
>> But, if the body content e.g. contains non-allowed characters, and can't
>> be parsed, the SIP stack can of course reject the INFO.
>>
>> Regards,
>>
>> Christer
>>
>>
>>
>>> -----Original Message-----
>>> From: [email protected] [mailto:[email protected]] On
>>> Behalf Of Hadriel Kaplan
>>> Sent: 9. joulukuuta 2008 1:46
>>> To: DRAGE, Keith (Keith); Elwell, John; Paul Kyzivat
>>> Cc: SIP List
>>> Subject: Re: [Sip] INFO Framework - one pakage per INFO
>>>
>>>
>>>
>>> > -----Original Message-----
>>> > From: DRAGE, Keith (Keith) [mailto:[email protected]]
>>> > Sent: Monday, December 08, 2008 6:25 PM
>>> >
>>> > > That's not always technically possible, AFAICT.  If the
>>> body content
>>> > > is bad, there's no guarantee it even got to the app-layer.
>>> > >
>>> >
>>> > Now you are getting really confused on layers. These are the
>>> > circumstances where the correct error is 4xx - 6xx
>>> indicating that the
>>> > SIP level was unable to deliver to the application.
>>>
>>> Ummm... no, that was the point *I* was making. :)
>>>
>>> Someone *else* in the email said:
>>>
>>> > > So I don't think we need we need a way of indicating in an INFO
>>> > > response problems with body content in the request.  Let the
>>> > > application send an INFO request in the reverse direction.
>>>
>>> And I said that's not always possible - the app layer may
>>> have no idea about a malformed body content arriving.  We
>>> need to allow 4xx-6xx to be body *content* formatting errors
>>> too.  I.e., if you send me an INFO for a package "myXml" with
>>> body-part of C-T "application/xml" and that body-part's
>>> content is in fact just the string ":-P", I should be able to
>>> respond with a 4xx.  The question is what the xx should be.
>>>
>>> -hadriel
>>> _______________________________________________
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>>> This list is for NEW development of the core SIP Protocol Use
>>> [email protected] for questions on current sip
>>> Use [email protected] for new developments on the application of sip
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>> _______________________________________________
>> Sip mailing list  https://www.ietf.org/mailman/listinfo/sip
>> This list is for NEW development of the core SIP Protocol
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> 
> 
> _______________________________________________
> Sip mailing list  https://www.ietf.org/mailman/listinfo/sip
> This list is for NEW development of the core SIP Protocol
> Use [email protected] for questions on current sip
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