[SR-Users] How to find whether or not certain header exists?

[Daniel-Constantin Mierla]

Hello,

you can use:

if(is_present_hf("aaa")) ...

Also, it should work like:

if($hdr("aaa") != $null) ...

The is_present_hf() should be slightly faster as it just walks through 
the list of headers, not parsing the header body and not returning its 
value.

Cheers,
Daniel

On 26/06/14 06:35, Allen Zhang wrote:
>
> Hi,
>
> If I normally receive a INVITE that has a header ‘aaa’ with value 
> ‘bbb’, but it’s possible that some INVITEs don’t have this header.
>
> How do I determine in the config file if the header exists?
>
> To check the value of the header I do if($hdr(aaa) == "bbb"). But what 
> if the header doesn’t exist?
>
> Cheer,
>
> Allen
>
>
>
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-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda

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