[SR-Users] [sr-dev] new module: gzcompress

Daniel-Constantin Mierla miconda at gmail.com
Mon Sep 23 19:20:37 CEST 2013

Short notes to let everyone know about some updates to the module - I 
just pushed few patches that enables compression/decompression for http 
traffic as well, so it can be used for xcap.

Also, I changed the default value of Content-Encoding header value from 
gzip (which I saw in rfc 3261) to deflate, which is used by FaceTime, 
but more important works with Firefox out of the box. Thus I assumed is 
the right value and should make the encoding compatible with Facetime 
(not that they do peering/federation over sip, but anyhow).

The readme has now a small config as example to get everyone starting 
with the module.

Credits to Kristian for his technical article in the first place as well 
as the follow up on the business side of the development.


On 9/23/13 5:32 PM, Kristian Kielhofner wrote:
> It's not Kamailio (or any of these other projects) that I'm concerned
> about.  As I've noted I'm most concerned about "in the middle" devices
> like NATs, firewalls, etc.
> Important clarification though, thanks!
> On Mon, Sep 23, 2013 at 11:25 AM, Alex Balashov
> <abalashov at evaristesys.com> wrote:
>> To note, though, Kamailio has no problem dealing with fragmented UDP. It
>> becomes a problem when sending UDP that gets fragmented to a UA that can't
>> reassemble it, or when sending to Kamailio through a NAT gateway that can't
>> properly reassemble it.
>> -- Alex
>> Daniel-Constantin Mierla <miconda at gmail.com> wrote:
>>> Hello,
>>> following the Kristian's email and blog about Apple Facetime using
>>> compressions of the body
>>> (http://lists.sip-router.org/pipermail/sr-users/2013-September/079816.html),
>>> I did a quick coding Friday evening and put together a new module that
>>> uses zlib to compress/decompress the body for SIP messages - I named it
>>> gzcompress, its readme is available at:
>>> - http://kamailio.org/docs/modules/devel/modules/gzcompress.html
>>> Might be useful for those that want to save bandwidth when peering two
>>> kamailios or target to get under MTU size. It is now enabled for SIP
>>> traffic only, but the plan is to get it for http as well, where it can
>>> be more relevant for xcap traffic.
>>> Cheers,
>>> Daniel
>> _______________________________________________
>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>> sr-users at lists.sip-router.org
>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Kamailio Advanced Trainings - Berlin, Oct 21-24; Miami, Nov 11-13, 2013
   - more details about Kamailio trainings at http://www.asipto.com -

More information about the sr-users mailing list