Based on the popular and very useful mod_rewrite for apache, UrlRewriteFilter is a Java Web Filter for any J2EE compliant web application server (such as Resin, Orion or Tomcat), which allows you to rewrite URLs before they get to your code. It is a very powerful tool just like Apache's mod_rewrite.
URL rewriting is very common with Apache Web Server (see mod_rewrite's rewriting guide) but has not been possible in most java web application servers. The main things it is used for are:
- URL Tidyness / URL Abstraction - keep URLs tidy irrespective of the underlying technology or framework (JSP, Servlet, Struts etc).
- Browser Detection - Allows you to rewrite URLs based on request HTTP headers (such as user-agent or charset).
- Date based rewriting - Allows you to forward or redirect to other URL's based on the date/time (good for planned outages).
- Moved content - enable a graceful move of content or even a change in CMS.
- Tiny/Friendly URL's (i.e. blah.com/latest can be redirected to blah.com/download/ver126.96.36.199/setup.exe)
- A Servlet mapping engine (see Method Invocation)
!UrlRewriteFilter uses an xml file, called urlrewrite.xml (it goes into the WEB-INF directory), for configuration. Most parameters can be Perl5 style Regular Expressions or Wildcard Expressions. This makes it very powerful indeed.
See the manual for more information.
- Add Maven dependency below or add urlrewritefilter-4.0.3.jar directly into your WEB-INF/lib directory.
<dependency> <groupId>org.tuckey</groupId> <artifactId>urlrewritefilter</artifactId> <version>4.0.3</version> </dependency>
- Add the following to your WEB-INF/web.xml (add it near the top above your servlet mappings (if you have any)): (see filter parameters for more options)
<filter> <filter-name>UrlRewriteFilter</filter-name> <filter-class>org.tuckey.web.filters.urlrewrite.UrlRewriteFilter</filter-class> </filter> <filter-mapping> <filter-name>UrlRewriteFilter</filter-name> <url-pattern>/*</url-pattern> <dispatcher>REQUEST</dispatcher> <dispatcher>FORWARD</dispatcher> </filter-mapping>
- Add urlrewrite.xml into your WEB-INF directory. (src/main/webapp/WEB-INF/ for Maven users)
- Restart the context.
You can visit http://127.0.0.1:8080/rewrite-status (or whatever the address of your local webapp and context) to see output (note: this page is only viewable from localhost).
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Previously on Google Code: http://code.google.com/p/urlrewritefilter.