Re: added OMA-EMN support to Kannel PPG

Hi,

Hi,

Yes, though i think this one should added both ppg core
(then the headers will be removed always; this is for efficiency)
and for ppg user group (the user to not accept certain headers)

Aarno

On 15 Aug 2007, at 18:10, Paul Flanagan wrote:

> Thanks Aarno
> Is that functionality likely to be added soon?
>
> I don't mind adding it but I'm not sure where it should be added  
> (I'm fairly new to using kannel)
>
> Something like a ppg group setting?
>
> group = ppg
> remove-headers = Content-length,Encoding-Version,Authorization
>
>
>
> On 15/08/07, Aarno Syvänen <[email protected]> wrote:
> Hi Paul.
>
> as a quick reply, adding a configuring option to PPG for omitting   
> certain headers would be
> a good idea, if only for efficiency (the transport is over SMS!)  
> Generally, a gateway would pass
> all (expect hop ones) headers, but in this case default behavior is  
> inefficient.
>
> Aarno
>
> On 15 Aug 2007, at 17:07, Paul Flanagan wrote:
>
>> Hi there
>> I needed a way to test a PAP interface I wrote to send OMA Email  
>> Notifications as defined in  http://www.openmobilealliance.org/ 
>> release_program/emn_v10.html
>>
>> so I added OMA-EMN support to kannel.
>>
>> OMA Email Notification (EMN) enables the mobile e-mail client to  
>> be notified of a new e-mail via wappush.
>> Attached is diff of gateway/gw/wap_push_ppg.c and 2 new files.  
>> Code is closely based on wap_push_sl_compiler.c
>>
>> It works fine but after much testing with SonyEricsson K800i I  
>> discovered that I had to remove all headers from the wap push  
>> except for
>> X-Wap-Application-Id: x-wap-application: emn.ua
>> (X-Wap-Application-Id: x-wap-application:emn.ua header is  
>> definitely required by all Nokia phones that support OMA EMN)
>>
>> It seems that there is no way to configure kannel to leave out  
>> certain headers. Most HTTP headers from the PAP request are  
>> converted to WSP headers e.g. HTTP authorization headers.
>> In addition to HTTP headers, it seems that the following 2 headers  
>> are always encoded
>>
>> Content-length
>> Encoding-Version
>>
>> Again, OMA-EMN did not work on SE phones if those headers were  
>> present.
>> I realise that this is probably a bug in the phone that it cannot  
>> handle those headers but it would be great if there was a way to  
>> configure kannel to leave out those headers.
>> To work-around that problem  I unconditionally remove these  
>> headers by adding the following lines to wap_push_ppg.c before the  
>> call to pap_compile()
>> http_header_remove_all(push_headers, "Content-Length");
>> http_header_remove_all(push_headers, "Encoding-Version");
>> That works but it's not a nice solution.
>> I believe above headers (Content-Length, Encoding-Version) are  
>> optional. It's pointless to send HTTP authorization headers to the  
>> phone.
>> Adding a configuration setting to tell kannel not to add certain  
>> headers into the WAPPUSH is probably the best solution.
>> I want to get your opinion on this. Am I missing something here? I  
>> didn't see anywhere in the WSP spec where it says those headers  
>> are required.
>>
>> I can send on a diff of the code I've written but I thought I'd  
>> wait until I handle the header problem in a better way
>>
>> This issue similar to issue raised in following thread
>> http://www.mail-archive.com/[email protected]/msg06941.html
>> except in this case, it just doesn't just increase the number of  
>> SMS messages required to carry the wappush, it breaks the OMA EMN  
>> functionaly.
>>
>>
>> Regards
>> Paul Flanagan
>>
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