====  HAProxy 2.0 replace text in querystring ====

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There is times when some **JavaScript genius** codes his program like this to **check** existence of a **parameter** in the Query String of a URL:
<code javascript>
if (url.includes('&id=')) ...
</code>

And you are just a sysadmin who **wants to stop** your **client for complaining** his stupid plugin does not work...
So, what you can do about it? If you are using HAProxy 2.0, there is a lot you can do!!

You can use the '**http-request set-query**' directive:
<code cfg>
http-request set-query %[query,regsub(id=,youare=stupid&id=,g)]
</code>

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Hopefully you **can do this**, or either **kill the JavaScript Genius** with your own hands, it is up to you!