Splunk Search

regex question

dbautist
Explorer

I have the following log snippet with a JSON payload that includes a newline. How do I extract the entire JSON payload?

ID: 123
Payload: {
"info":{
"name":"bob",
"age":"35"
}
}

Expected field should contain:

{
"info":{
"name":"bob",
"age":"35"
}
}

Tags (1)
0 Karma
1 Solution

aholzer
Motivator

This should do the trick for you:

Payload: (?P<YourField>[^\}]+\}){2}

Assuming that all your payloads only have 2 close curly brackets '}'

Use the "interactive field extractor" view to test the regex before applying it (run your search > click the blue box next to one of the events > select "Extract Fields")

EDIT:

Change the value {2} from my above code to match the number of "closing curly brackets" '}' in your payload to have the regex work.

View solution in original post

0 Karma

aholzer
Motivator

This should do the trick for you:

Payload: (?P<YourField>[^\}]+\}){2}

Assuming that all your payloads only have 2 close curly brackets '}'

Use the "interactive field extractor" view to test the regex before applying it (run your search > click the blue box next to one of the events > select "Extract Fields")

EDIT:

Change the value {2} from my above code to match the number of "closing curly brackets" '}' in your payload to have the regex work.

0 Karma

aholzer
Motivator

As long as the number of "closing curly brackets" '}' is consistent across all your payloads, just count them and then change the {2} from my original post to the new number.

So in your latest example the {2} should be changed to a {4}.

0 Karma

dbautist
Explorer

That's actually not the case. I have something like:

{
"test":{
"a":"b"
"c":{
"d":"e"
}
}
"e":{
"f":"g"
}
}

0 Karma
Got questions? Get answers!

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Meet up IRL or virtually!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Get Updates on the Splunk Community!

Catalog Is Now Generally Available on Splunk Cloud Platform

A Unified View of Your Data  Security logs, application events, business data, and historical telemetry often ...

Developer Spotlight with Eduard Lekanne

From Network Engineer to Building Agentic AI for Splunk Eduard Lekanne has been architecting technology ...

From Data Landing to Insight

Search Across More of Your Data Ecosystem The data you need may live in Splunk, high-volume machine data, ...