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<p class="MsoNormal"><span style="color:#1F497D">Thanks Daniel.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I didn’t know “$null” existed. But I’ll use is_present_hf since I’m not interested in the contain of the header.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-NZ">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;mso-fareast-language:EN-NZ">
sr-users-bounces@lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org]
<b>On Behalf Of </b>Daniel-Constantin Mierla<br>
<b>Sent:</b> Thursday, 26 June 2014 7:57 p.m.<br>
<b>To:</b> Kamailio (SER) - Users Mailing List<br>
<b>Subject:</b> Re: [SR-Users] How to find whether or not certain header exists?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Hello,<br>
<br>
you can use:<br>
<br>
if(is_present_hf("aaa")) ...<br>
<br>
Also, it should work like:<br>
<br>
if($hdr("aaa") != $null) ...<br>
<br>
The is_present_hf() should be slightly faster as it just walks through the list of headers, not parsing the header body and not returning its value.<br>
<br>
Cheers,<br>
Daniel<o:p></o:p></p>
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<p class="MsoNormal">On 26/06/14 06:35, Allen Zhang wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">If I normally receive a INVITE that has a header ‘aaa’ with value ‘bbb’, but it’s possible that some INVITEs don’t have this header.<o:p></o:p></p>
<p class="MsoNormal">How do I determine in the config file if the header exists?<o:p></o:p></p>
<p class="MsoNormal">To check the value of the header I do if($hdr(aaa) == "bbb"). But what if the header doesn’t exist?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Cheer,<o:p></o:p></p>
<p class="MsoNormal">Allen<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-NZ"><br>
<br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list<o:p></o:p></pre>
<pre><a href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a><o:p></o:p></pre>
<pre><a href="http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users">http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users</a><o:p></o:p></pre>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-NZ"><br>
<br>
<o:p></o:p></span></p>
<pre>-- <o:p></o:p></pre>
<pre>Daniel-Constantin Mierla - <a href="http://www.asipto.com">http://www.asipto.com</a><o:p></o:p></pre>
<pre><a href="http://twitter.com/#!/miconda">http://twitter.com/#!/miconda</a> - <a href="http://www.linkedin.com/in/miconda">http://www.linkedin.com/in/miconda</a><o:p></o:p></pre>
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