How to write regular expression in JMeter for CSRF token?

Question

I am trying to write regular expression in JMeter regular extractor for CSRF Token:

CSRF Token: P_rF1DbLR4JWcBtxEwGKKw==

and Expression I am using is:

name : CSRF_Token_Retrieved_Value
regular expression: x-csrf-token:\s+(.+)
template : $1$

I get this error

CSRF token validation failed

in next steps.

May be you can try checking the regular expression used from the previous response using the View Result Tree > [Regular expression tester](https://jmeter.apache.org/usermanual/component_reference.html#View_Results_Tree). — Raj, May 19 '20 at 05:16

score 0 · Answer 1 · answered May 20 '20 at 14:34

Your regular expression doesn't match the value you provided, you need to change it to:

CSRF Token:\s+(.+)

Demo:

Also if the token comes in one of the HTTP response headers you need to switch the Regular Expression Extractor to look into Response Headers:

1 Answers1