[SR-Users] Substitution of Contact Header

[Alex Balashov]

Again, the question has to be asked: why do you want to rewrite the Contact header? And is there a better way to accomplish what you are trying to accomplish? 

Contact is constructed by the endpoints, not the proxy. Touching it is almost never a good idea.

Where Contact is statefully rewritten by the topology hiding modules, touching it is also not a good idea.

It’s just not a good idea.

—
Sent from mobile, with due apologies for brevity and errors.

> On Apr 7, 2020, at 2:29 AM, Mack Hendricks <mack at dopensource.com> wrote:
> 
> 
> Hey All,
> 
> I always have issues with substituting out header values.  I’ve tried subst and subst_hf.   
> 
> Here is the value that I want to change out:
> 
> Contact: <sip:52.41.52.34:5060;line=sr-h06Cy7RYRFkYacM0a7epa7sVa7sVRcNCW7IbaGZ9RGlC>
> 
>  And this is what I want it to be
> 
> Contact: <sip:1313717555 at jump.dsiprouter.net;line=sr-h06Cy7RYRFkYacM0a7epa7sVa7sVRcNCW7IbaGZ9RGlC>
> 
> I’m using this 
> 
> subst('/^Contact: <sip:(.*);(.*)>$/Contact: <sip:1313717555 at jump.dsiprouter.net;\2>\r/ig’);
> 
> And it doesn’t work, but putting into a online regular expression tester it looks good as shown below.  Any ideas? 
> 
> <PastedGraphic-1.png>
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