How can I use environment variables in ProxyPassMatch?

Question

I am having difficulty figuring out how to use environment variables in ProxyPassMatch.

My general format:

<LocationMatch "(?<THING>Regex)">
    ProxyPassMatch http://example.com:8000/%{env:MATCH_THING}
    ProxyPassReverse /
</LocationMatch>

I have %{MATCH_THING}e logged and the log shows that the regex-captured URL is capturing what I want it to capture, but every time I try to access the LocationMatched URL through the proxy, I get 404 Not Found.

It works when I directly try http://example.com:8000/RegexCapturedURL.
Where RegexCapturedURL = %{MATCH_THING}e;

Here are some of the ProxyPassMatch lines I have tried so far:

• ProxyPassMatch http://example.com:8000/%{env:MATCH_THING}
• ProxyPassMatch http://example.com:8000/%{MATCH_THING}
• ProxyPassMatch http://example.com:8000/%{THING}
• ProxyPassMatch http://example.com:8000/%{MATCH_THING}e

What am I doing wrong or not understanding correctly?

Answer 1

I Found this to be be very close to what you are looking.

https://stackoverflow.com/a/11852428/1459214

you can try the regex first to include more broad matching and then check to see if your regex is the issue, as given in the answer

main post is here: https://stackoverflow.com/questions/11852238/proxypassmatch-with-proxypassreverse