Splunk Search

Why is a function as 3-rd arg in the "replace" function not evaluating capturing groups?

philbond
Observer

Hi all,

Due to utf16/8-mismatch, I find a lot of utf16 \xnn chars in my events; this makes the json-parser  kind of losing it.

So I want to get the right utf8 chars out of a dictionary json-table by doing:

f=replace(_raw,"\\\\x([0-9a-fA-F]{2})",json_extract(utfx,"{}.\1"))

The dictionary simply looks like [{"00":"utf8char-1"}, ..., {"AE":"é"},...]

But this doesn't seem to work, the event even gets nilled completely.

Something explicit like this does seem to work though: (here for instance, all utf16 \xAE chars get replaced by the "é" char:
f=replace(_raw,"\\\\x([0-9a-fA-F]{2})",json_extract(utfx,"{}.9E"))

or this:

f=replace(_raw,"\\\\x([0-9a-fA-F]{2})","\1")), which simply removes the "\x"

...so is it like the capt.groups of the regex in replace() is not evaluated if it is arg to another function io a plain string?

Tx.

0 Karma

philbond
Observer

..bump..

Anybody??

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!

Announcing Modern Navigation: A New Era of Splunk User Experience

We are excited to introduce the Modern Navigation feature in the Splunk Platform, available to both cloud and ...

Modernize your Splunk Apps – Introducing Python 3.13 in Splunk

We are excited to announce that the upcoming releases of Splunk Enterprise 10.2.x and Splunk Cloud Platform ...

Step into “Hunt the Insider: An Splunk ES Premier Mystery” to catch a cybercriminal ...

After a whole week of being on call, you fell asleep on your keyboard, and you hit a sequence of buttons that ...