Apache subfolder as Reverse Proxy not handling RewriteRule

Question

I have a proxy setup on an Apache 2.4 (Server A) as follows

SSLProxyEngine On ProxyRequests Off ProxyPreserveHost On ProxyHTMLInterp On ProxyHTMLExtended On SSLProxyVerify none SSLProxyCheckPeerCN off SSLProxyCheckPeerName off SSLProxyCheckPeerExpire off <Location /proxy> ProxyPass https://example.com ProxyPassReverse https://example.com SetOutputFilter proxy-html ProxyHTMLURLMap https://example.com </Location> 

Server B (example.com in this example) has a rewrite rule:

RewriteRule ^/?$ /subdir [L] 

When I browse to https://servera.com/proxy the url changes to https://servera.com/subdir which throws a 404 error. If I change the url to https://servera.com/proxy/subdir everything works.

My question is how can I setup Server A's proxy to preserve the /proxy in the url?

Answer 1

Try adding / like in the ProxyPass examples.

<Location /proxy/> ProxyPass https://example.com/ ProxyPassReverse https://example.com/ SetOutputFilter proxy-html ProxyHTMLURLMap https://example.com/ </Location> 

It might help in this case where the site behind the proxy redirects to an absolute path on the same hostname.