Regular Expressions 101

Explanation

Pro

Group your_field(?<your_field>(.|\n)+)

Group 2(.|\n)+

+repeats the group contents below at least once:

1st Alternative.

.any character (except for line terminators)

2nd Alternative\n

\na line-feed (newline) character (ASCII 10)

User-Agent:the literal text User-Agent: (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

REGISTER sip:(?<your_field>(.|\n)+)User-Agent:

New

03:25:17.296: SIPTR: Received [0,UDP] 543 bytes from 10.xx.7x.1xx:8080 <<<<<
REGISTER sip:10.xx.7x.1xx SIP/2.0
Via: SIP/2.0/UDP 10.xx.7x.1xx;branch=hkhi8u09uj
From: "Dummy" ;tag=78979uh
CSeq: 68789 REGISTER
Call-ID: xxxxxx-7689-xxxx@10.xx.7x.1xx
Contact: ;methods="INVITE, ACK, BYE, CANCEL, OPTIONS, UPDATE, REFER"
User-Agent: Polycom_r64786r9879r87
Accept-Language: en
Max-Forwards: 70
Expires: 60