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How to escape/encode characters in .htaccess RewriteRule

2022-05-06 13:07 Ωmega imported from Stackoverflow

I want the Accept-Language header to be available in JavaScript, therefore in my .htaccess I set the following rule:

RewriteRule .* - [CO=HTTP-Accept-Language:%{HTTP:Accept-Language}:%{HTTP_HOST}:0:/]

This works, but not as anticipated.

The cookie is set as following:

Set-Cookie: HTTP-Accept-Language=en-US,en;q=0.9; path=/; domain=XXXXXX.XX

Since the cookie value contains ; character, JavaScript's document.cookie trims this value to

en-US,en

How can I force RewriteRule to escape\encode deliminator characters (; and space) to ensure that the entire cookie value is properly recorded?

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