I have a Google Appengine/Guice/Wicket Application. My problem is that due to the mapping I can\'t access the /_ah/admin Page anymore.
My Servlet Module says:
<I solved the same problem with Spring/GAE using the UrlRewriteFilter. Please take a look at the source here. I assume a similar solution could be used for your situation.
<!DOCTYPE urlrewrite PUBLIC "-//tuckey.org//DTD UrlRewrite 3.0//EN" "http://tuckey.org/res/dtds/urlrewrite3.0.dtd">
<urlrewrite>
<rule>
<from>^/appstats/(.*)$</from>
<to last="true">/appstats/$1</to>
</rule>
<rule>
<from>^/_ah/(.*)$</from>
<to last="true">/_ah/$1</to>
</rule>
<rule>
<from>^/(.*)$</from>
<to last="true">/app/$1</to>
</rule>
I have found a more elegant solution :
Instead of using the GuiceFilter, subclass it to intercept _ah/* calls and let the servlet container do its regular job instead of letting Guice intercepting it. Here I prevent Guice from intercepting /_ah/* but /_ah/warmup because /_ah/warmup is supposed to be handled by the programmer.
package com.kya.guice.mvc;
import java.io.IOException;
import java.util.regex.Pattern;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import com.google.inject.servlet.GuiceFilter;
public class GaeSafeGuiceFilter extends GuiceFilter {
private static final Pattern p = Pattern.compile("/_ah/.*");
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest)request;
if (p.matcher(req.getRequestURI()).matches() && !req.getRequestURI().equals("/_ah/warmup")) {
chain.doFilter(request, response);
return ;
}
super.doFilter(request, response, chain);
}
}
You then just have to change your web.xml with :
<filter>
<filter-name>guiceFilter</filter-name>
<filter-class>com.kya.guice.mvc.GaeSafeGuiceFilter</filter-class>
</filter>
instead of com.google.inject.servlet.GuiceFilter
I know this is is a pretty old question with an accepted anser, however the solution is more straight forward than URL rewriting. In your Guice servlet module you can pass configuration parameters as follows:
Map wicketParams = new HashMap(3);
wicketParams.put(WicketFilter.IGNORE_PATHS_PARAM, "/_ah/*");
wicketParams.put(WicketFilter.FILTER_MAPPING_PARAM, ROOT_FILTER_MAPPING_URL);
filter("/*").through(GuiceWicketFilter.class, wicketParams );
Just for reference, here is a way to do it with serveRegex
serveRegex("/(?!_ah).*").with( WicketServlet.class, getWicketServletParams() );