Regex Basic Examples

The following table provides configuration examples for using regular expressions in the Message Manipulations table.

Regex Examples for Message Manipulation, Message Conditions and CSR

Message Type	Condition	Action Subject	Action Type	Action Value
invite.request	header.diversion.0 regex (<.)(;urlparam= [a-z])(.*>)	header. diversion.0	Modify	$1+$3
invite.request	header.diversion.0 regex (<.)(;urlparam= [a-z])(.*>)	header. diversion.0	Add	$1 + ';mynewparam=good' + $3
invite.response.100	header.via regex (SIP/2.0/UDP)(.); branch=(.)	header. thebranch	Add	$3
subscribe	header.to regex (.)(1001)(.)@(.*)>	header.to	Modify	$1+$3+'8@'+$4

Regex Examples for Pre-Parsing Manipulation Rules

Message Type	Pattern	Replace-With	Explanation
invite.request	From: <sip:([^@]+)(@\S)	‘From: <sip:’ + ‘1000’ + $2	Replaces user part (if exists) in From header URL with 1000, for INVITE only.
invite.request	(From: <sip:)([^@]+)(@\S)	$1 + ‘1000’ + $3	Same as above.
any.response	Refer-To: (sip:\S)	‘Refer-To: <’ + $1 + ‘>’	Encloses Refer-To header value with angled brackets <…>, for responses only.
	From: ([^"\r\n]) (<sip:\S*)	‘From: “’ + $1 + ‘” ’ + $2	Adds quotes to the From header's display name (if exists).
cancel.request	(CANCEL sip:)(\d)(@)(.)(To: <sip:)(\d)(@)(.)	$1+$6+$3+$4+$5+$6+$7+$8	Replaces the user part of the Request-Uri header URL with user part of the To header URL, for SIP CANCEL messages only.