Apache: proxy an internal URL using regex

Question

I have a few servlets listening on internal ports which are not accessible from outside. I use Apache's ProxyPass and ProxyPassReverse directives to serve them securely from port 443:

ProxyPass         /media http://localhost:9002/
ProxyPassReverse  /media http://localhost:9002/

This works fine - https://example.com/media is served from http://localhost:9002/.

The problem happens when the URL has a varying part. For example:

https://example.com/image/IMAGE_NAME_1 should be served from http://localhost:9002/image/IMAGE_NAME_1.

And https://example.com/image/IMAGE_NAME_2 should be served from http://localhost:9002/image/IMAGE_NAME_1.

I've tried some variations, including:

RewriteEngine  on
RewriteRule   ^/image/(.*)$  http://localhost:9002/image/$1 [L,PT]
ProxyPass         /image/ http://localhost:9002/image
ProxyPassReverse  /image/ http://localhost:9002/image

But this configuration results in Bad Request in the browser and

Invalid URI in request GET /image/1 HTTP/1.1

In the logs.

How do I proxy internal servlets where the URL has a varying part?

`IMAGE_NAME` is a parameter, because it varies between calls. Am I using the term incorrectly? — Adam Matan, Feb 23 '14 at 20:31
Yes, it appears so. There's no query string on any of these URLs, and that's where one would pass parameters. — Michael Hampton, Feb 23 '14 at 20:31
Of course, my bad. Parameters in URL context has that meaning. Regex matching would be a better description. Rewriting my answer. — Adam Matan, Feb 23 '14 at 20:43

score 14 · Accepted Answer · answered Feb 23 '14 at 20:31

14

You use ProxyPassMatch instead:

ProxyPassMatch    ^/media http://localhost:9002/(.*)
ProxyPassReverse  ^/media http://localhost:9002/(.*)

Find further details in the Apache online documentation.

answered Feb 23 '14 at 20:31

dawud

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Apache: proxy an internal URL using regex

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