Field Extraction

[jeck11]

This has been asked a million times. I've been digging through the various postings but haven't figured out what I'm doing wrong. 

I'm able to do a search time extraction using the rex command to get a field exactly the way I want it. But then when I try to add it to the field extractors, it's including too much information. I need to extract the LINK_TARGET value from the event below but the USER details are also being included in the field extractor setup. 

Hopefully my redactions don't make this impossible for gurus to assist.

Search command: 

index="index" search_term | rex field=_raw "LINK_TARGET\s:\s(?<link_target>.*)\n"

Data:

2021-11-10 16:03:14.631 INFO  [blah] [Country=US] [User=user] [ip] [DefaultLynxMetricsLogger] [blah] [blah]  Metrics logging start: key blah_SEARCH_ORIGIN 
LINK_TARGET : https://www.blah.com/en_US/blah?utm_source=copy&utm_medium=blah&utm_campaign=blah
USER : 9999999
Metrics logging end

[ITWhisperer · Accepted solution]

Try this:

| rex field=_raw "LINK_TARGET\s:\s(?<link_target>\S*)"

[jeck11]

The rex command is already working in the search time extraction. I'm trying to define it as a field extraction and that is where it's pulling back too much. Thanks though.

[ITWhisperer]

What extraction do you currently have?

[jeck11]

I just updated the original post with screenshot. Do they help clarify the issue?

[ITWhisperer]

So have you tried the different suggestions for the regex string?

[jeck11]

I'm a moron. I just copied yours over and it worked. Thanks for sticking with me. I'll mark it as the answer.

[rafadvega]

Hi!

You can use this command:

index="index" search_term | rex field=_raw "LINK_TARGET\s:\s(?<link_target>[^\n]*)\n"

[jeck11]

The search syntax that I included is working fine. I'm trying to define it as a field extraction and that's where it's pulling in too much. Thanks though.