[jetty-users] Unexpected behaviour with basic RewriteRegexRule

[Ian Stevens <i.stevens@xxxxxxxxxxxx>]

Hi everyone. I'm having trouble using org.eclipse.jetty.rewrite.handler.RewriteRegexRule from within jetty-rewrite.xml. My needs are very simple:

* Internally rewrite all URLs matching /foo/(.*) to a WAR named $1 in webapps.
* Make the original untranslated URL available to the WAR in getPathInfo().

For instance, if the URL is /foo/bar, that should internally redirect to a webapp named bar.war (ie. /bar). Similarly, /foo/bar/baz should redirect to /bar/baz and be picked up by bar.war. Ideally, I would set up Jetty so that all WARs inside a specific directory are accessed from /foo. Is that possible?

My URL redirection requirements are really basic, but I can't get even this to work. I must be missing something. I can do it using mod_rewrite in Apache, but I don't want to introduce that extra dependency. Searching the web, I'm not the only one who has this issue but I can't find any solutions.

I'm using jetty-hightide-7.2.1.v20101111 on Mac OS Snow Leopard (should that make a difference).

You can find my etc/jetty-rewrite.xml below. Here's what happens:

* http://localhost:8080/bar brings up the webapp at bar.war just fine.
* http://localhost:8080/foo/bar => HTTP 404 (Jetty style)
* http://localhost:8080/foo => HTTP 404 (Jetty style)
* http://localhost:8080/foo/ => contents of webapps/root/index.html
* http://localhost:8080/foo/a => contents of webapps/root/index.html
* Indeed, any single letter after /foo/ brings up webapps/root/index.html. Anything else brings up HTTP 404

If I change replacement to "/$1", all the above exhibit the same behaviour except:

* http://localhost:8080/foo/bar => HTTP 302 to http://localhost:8080/bar/
* http://localhost:8080/foo/a => HTTP 404 (Jetty style)

This is great, except that I don't want HTTP 302 as that's not an internal redirect as advertised.

If I switch to RedirectRegexRule without the leading slash in replacement, then:

* http://localhost:8080/foo => HTTP 404 (Jetty style)
* anything starting with http://localhost:8080/foo/ results in a redirection loop to the same URL

Introducing the slash with RedirectRegexRule redirects with HTTP 302 as expected.

Any help would be appreciated. Thanks.

Ian.

My etc/jetty-rewrite.xml:

<Configure id="Server" class="org.eclipse.jetty.server.Server">
    <Get id="oldhandler" name="handler"/>

    <Set name="handler">
     <New id="Rewrite" class="org.eclipse.jetty.rewrite.handler.RewriteHandler">
      <Set name="handler"><Ref id="oldhandler"/></Set>
      <Set name="rewriteRequestURI">true</Set>
      <Set name="rewritePathInfo">false</Set>
      <Set name="originalPathAttribute">requestedPath</Set>

      <Call name="addRule">
        <Arg>
          <New class="org.eclipse.jetty.rewrite.handler.RewriteRegexRule">
            <Set name="regex">/foo/(.*)</Set>
            <Set name="replacement">$1</Set>
          </New>
        </Arg>
      </Call>

     </New>
    </Set>
</Configure>