[Freeswitch-users] Custom Headers with Sip.js

[Ali Jibran]

Hi all.
I make a call to FS callcenter using webRTC. Now I would like to add some
additional data to the header.
That I did by using extraheaders. Now all that is good. I can see the
custom header in the sip trace on freeswitch.

For e.g in sip.js I add:
var options = {
  extraHeaders: [ 'a: foo' ]
};


on FS i get:
 INVITE sip:900 at anonymous.invalid SIP/2.0
   Via: SIP/2.0/WS 9jscv0q24s4m.invalid;branch=z9hG4bK1002472
   Max-Forwards: 70
   To: <sip:900 at anonymous.invalid>
   From: <sip:anonymous.hfsqa4 at anonymous.invalid>;tag=depmif1fo5
   Call-ID: l5pieavpjguoset7ugvd
   CSeq: 1458 INVITE
  * a: foo*
   Contact: <sip:8rgi365g at 9jscv0q24s4m.invalid;transport=ws;ob>
   Allow: ACK,CANCEL,BYE,OPTIONS,INVITE,MESSAGE
   Content-Type: application/sdp
   Contact: <sip:8rgi365g at 9jscv0q24s4m.invalid;transport=ws;ob>
   Allow: ACK,CANCEL,BYE,OPTIONS,INVITE,MESSAGE
   Content-Type: application/sdp
   Supported: outbound
   User-Agent: SIP.js/0.5.0
   Content-Length: 3636

How do I access it in the dialplan? I tried ${sip_h_X-a} but it didnt't
work. Help please?
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