[FIXED] How to change content-type but keep charset on Apache2?

Issue

I have a Apache2 server on Ubuntu for proxy server. I want to change content-type of response to client to another but it will remove charset too.

# /etc/apache2/sites-available/000-default.conf
Header set Content-Type "text/html" "expr=%{resp:Content-Type} =~ m|text/abcdefgh|"  

With this setting, when it see the header which content-type is text/abcdefgh or text/abcdefgh; charset=utf-8 or text/abcdefgh; charset=shift_jis, it will become text/html without charset

1. Is there any way to change part of content-type by Header set or others?
2. Where can I find the meaning of this pattern?

Many thanks!

Solution

Did you try to use edit instead of set?

Header edit Content-Type "text/abcdefgh" "text/html"

It should just replace text/abcdefgh with text/html but leave the charset as is

Answered By - Capsule

Answer Checked By - Willingham (PHPFixing Volunteer)