| // Copyright (C) 2012 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.gerrit.httpd; |
| |
| import com.google.gerrit.extensions.registration.DynamicSet; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import com.google.inject.servlet.ServletModule; |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| |
| import javax.servlet.Filter; |
| import javax.servlet.FilterChain; |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| |
| /** Filters all HTTP requests passing through the server. */ |
| public abstract class AllRequestFilter implements Filter { |
| public static ServletModule module() { |
| return new ServletModule() { |
| @Override |
| protected void configureServlets() { |
| DynamicSet.setOf(binder(), AllRequestFilter.class); |
| filter("/*").through(FilterProxy.class); |
| } |
| }; |
| } |
| |
| @Singleton |
| static class FilterProxy implements Filter { |
| private final DynamicSet<AllRequestFilter> filters; |
| |
| @Inject |
| FilterProxy(DynamicSet<AllRequestFilter> filters) { |
| this.filters = filters; |
| } |
| |
| @Override |
| public void doFilter(ServletRequest req, ServletResponse res, |
| final FilterChain last) throws IOException, ServletException { |
| final Iterator<AllRequestFilter> itr = filters.iterator(); |
| new FilterChain() { |
| @Override |
| public void doFilter(ServletRequest req, ServletResponse res) |
| throws IOException, ServletException { |
| if (itr.hasNext()) { |
| itr.next().doFilter(req, res, this); |
| } else { |
| last.doFilter(req, res); |
| } |
| } |
| }.doFilter(req, res); |
| } |
| |
| @Override |
| public void init(FilterConfig config) throws ServletException { |
| for (AllRequestFilter f: filters) { |
| f.init(config); |
| } |
| } |
| |
| @Override |
| public void destroy() { |
| for (AllRequestFilter f: filters) { |
| f.destroy(); |
| } |
| } |
| } |
| |
| @Override |
| public void init(FilterConfig config) throws ServletException { |
| } |
| |
| @Override |
| public void destroy() { |
| } |
| } |