[Serusers] Extract "from" header

[Bob Bob]

Hi,
 
I'd like to extract the From URI from a request and use it to add a Call-Info header:
From: <sip:test at test.com>;tag=fd29df3df47
->
Call-Info: <;purpose=icon">http://myserver.com/get.php?id=sip:test@test.com>;purpose=icon
 
Can it be done with ser? There are a lot of functions but none of them seem to be able to extract headers and use the information in another header.
 
Best regards,
Chris

		
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