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Is there a way to set a new response header conditionally, where the condition uses another response header? Specifically, the new response header should be set only if the response has a certain Content-Type.
I have looked into mod_headers in combination with mod_setenvif but it looks like conditions can only use request headers, not response headers.
Thanks, John
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Using IF Else (Apache >=2.2) Similarly, if you want to set header based on requested url (e.g /product/) you can use QUERY_STRING variable. Just like, SetEnvIf, you can place this If-else condition in your server's location or directory directives, or . htaccess file.
You can set response headers, you can add response headers And you can wonder what the difference is. But think about it for a second, then do this exercise. Draw a line from the HttpResponse method to the method's behavior.
This module provides directives to control and modify HTTP request and response headers. Headers can be merged, replaced or removed.
Apache 2.4 is the answer:
Set Cache-Control header when response content type is application/pdf
Header set Cache-Control "no-store,no-transform" "expr=%{resp:Content-Type} =~ m|application/pdf|"
Do NOT try with the IF directive. It is evaluated too early in the process. For example, the following will NOT work:
<If "%{resp:Content-Type} =~ m|application/pdf|">
Header set Cache-Control "no-store, no-transform"
</If>
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