[Kamailio-Users] add Allow header to sl_send_reply

[Olle E. Johansson]

19 dec 2009 kl. 10.28 skrev Daniel-Constantin Mierla:

> 
> 
> On 12/19/09 9:50 AM, Olle E. Johansson wrote:
>> 18 dec 2009 kl. 22.27 skrev Alex Balashov:
>> 
>>   
>>> On 12/18/2009 04:24 PM, Daniel-Constantin Mierla wrote:
>>>     
>>>> Hi Alex,
>>>> 
>>>> On 12/18/09 9:57 PM, Alex Balashov wrote:
>>>>       
>>>>> Daniel,
>>>>> 
>>>>> But the documentation
>>>>> 
>>>>> http://www.kamailio.org/docs/modules/1.5.x/textops.html#id2506229
>>>>> 
>>>>> says that append_hf() can be used inside a reply route?
>>>>>         
>>>> yes, it can be used. The nuance in the initial question, as I
>>>> understood, was to add a header to a reply for current processed
>>>> request. with append_hf you add a header to the current processed sip
>>>> message (no matter is request or reply).
>>>> 
>>>> append_to_reply() adds a header to any eventual reply kamailio may send
>>>> for the request being processed, not visible in the request if that is
>>>> forwarded.
>>>> 
>>>> Just to give an example, save("location") sends a reply from inside the
>>>> function. If you want to have a custom header in that reply, that can be
>>>> done with append_to_reply().
>>>>       
>>> Oh, I see.  I did not realise append_hf() always applied to the request context only.  Thanks a lot!  Learn something new every day.
>>>     
>> I think the confusion is about which message you process in the on_reply branches - you actually process the initial request that you triggered with a reply route in the initial processing, not the reply. Thus if you use append_hf - you add a header to the request, not the response.
>> 
>>   
> a clarification for above: in onreply_route you process the reply and append_hf() adds a header to reply.
> 
> To put it in another words:
> - in route {...} - sip request is processed and append_hf() adds a header to that request. If you want to send a reply for that request from kamailio, then append_to_reply() can be used to add headers in the to-be-built reply
> - in onreply_route - sip reply is processed and append_hf() adds a header to that reply. append_to_reply() cannot be used in onreply_route.
> 
Thanks for the clarification. Lot's of interesting misunderstandings in this thread :-)

/O