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Eloi Juszczak avatar Server

Apache using an expression in the mod_ext_filter module

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Eloi Juszczak

I need to configure an apache reverse proxy to return a js script on each page. For that, I use a perl script that injects the javascript to the pages. To do this, I used the following directive: ExtFilterDefine fixtext mode=output intype=text/html cmd="/home/eloi/leanovia/observability/webserver-script/ttk-js-rum-injector.perl ${cookies_retrieved}" I succeeded until this step.

However, I need to get the cookies from the request to use it in the javascript. I know I need to use expr=%{req:Cookie}

However, the expression does not evaluate when I use it like this:

ExtFilterDefine fixtext mode=output intype=text/html cmd="/home/eloi/leanovia/observability/webserver-script/ttk-js-rum-injector.perl expr=%{req:Cookie}"

I know I'm really close to the solution, but I've been struggling for hours trying to get the expression evaluated, without success. I haven't found a solution to my problem. I know that it is possible to send a header in the response that evaluates this expression, since I could test it with this directive:

Header set eloi "${cookies_retrieved}"

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