How to replace specific text in header-replace, not a whole header?

hiangeel

Hi, I got a problem and I don't know how to solve it.
I have a website that every request, it contains a header name Cookie that includes a text string determining language of the page. I want to change that string from DIS_LANG=jp to DIS_LANG=en.
With scripting, I can do it easily. But if I want to use Header Rewrite, is there any way to do it? I see the manual, and it only replace a whole value of a header instead of a part of it.
https://manual.nssurge.com/http-processing/header-rewrite.html

SurgeTeam

Correct. Please use scripts to perform complex modifications.