Splunk Search

How to regex over nested jsons with foreach and rex?

neuromantik
Engager

Hi everyone,

Currently I have a log record in the form of nested jsons, not arrays of jsons:

{"root_key": {"subkey_0": {nested json string}, ... , "subkey_N": {nested json string}}}

I want to extract some fields with rex from each subkey json string.
Is it possible somehow to accomplish this by foreach and rex?

Something like this pseudocode:

foreach subkey:
    (field_value_0, ... field_value_M) <--- rex(subkey json string)

The goal is to build the following list:

[
    [field_value_0, ... field_value_M],
    ...
    [field_value_0, ... field_value_M]
]

And to display it with table command.

0 Karma
1 Solution

to4kawa
Ultra Champion
| makeresults 
| eval _raw="{\"root_key\": {\"subkey_0\": {a},\"subkey_1\": {b} , \"subkey_N\": {c}}}" 
| rex ":(?<json>.+)}$"
| rex field=json max_match=1000 ": \{(?<field_value>.+?)\}"

limits: 1000 objects. if you want more, change max_match args.

View solution in original post

to4kawa
Ultra Champion
| makeresults 
| eval _raw="{\"root_key\": {\"subkey_0\": {a},\"subkey_1\": {b} , \"subkey_N\": {c}}}" 
| rex ":(?<json>.+)}$"
| rex field=json max_match=1000 ": \{(?<field_value>.+?)\}"

limits: 1000 objects. if you want more, change max_match args.

Get Updates on the Splunk Community!

Optimize Cloud Monitoring

  TECH TALKS Optimize Cloud Monitoring Tuesday, August 13, 2024  |  11:00AM–12:00PM PST   Register to ...

What's New in Splunk Cloud Platform 9.2.2403?

Hi Splunky people! We are excited to share the newest updates in Splunk Cloud Platform 9.2.2403! Analysts can ...

Stay Connected: Your Guide to July and August Tech Talks, Office Hours, and Webinars!

Dive into our sizzling summer lineup for July and August Community Office Hours and Tech Talks. Scroll down to ...