The URL argument must be parsable as a URL before regexp substitutions (as well as after). This limits the matches you can use. For instance, if we had used
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@
1641384 13f79535-47bb-0310-9956-
ffa450edef68
then</p>
<highlight language="config">
- ProxyPassMatch ^(/.*\.gif)$ http://backend.example.com$1
+ ProxyPassMatch ^/(.*\.gif)$ http://backend.example.com/$1
</highlight>
<p>will cause a local request for