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Editorial Team
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Asked: 2026-05-26T21:05:46+00:00

I am looking into using URLRewriteFilter to version CSS files in my GWT application.

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I am looking into using URLRewriteFilter to version CSS files in my GWT application. The CSS are spread out all over so the incoming request can of any arbitrary form. I just want to do the following

if a request is of form http://x.y.z:8080/blah/1/2/R01_local.css I want to serve http://x.y.z:8080/blah/1/2/local.css (ie stripping out the prefix for the file)

The URLRewrite filter in question is http://www.tuckey.org/urlrewrite/

I am not sure how to use it to construct a regex which would be of form replace (exp1)R01_(exp2).css with (exp1)(exp2).css

The application in question is in GWT/Spring

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1 Answer

  1. Editorial Team

    This should work if you know you’ll never have “R01_” in any other part of your URLs:

    <rule>
    <from>^(.*)R01_(.*).css$</from>
    <to>$1$2.css</to>
</rule>

    Probably better to make it more specific, but that’s dependent on your directory organization and what makes sense in context. Example:

    <rule>
    <from>^/blah/(.*)R01_(.*).css$</from>
    <to>/blah/$1$2.css</to>
</rule>
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