| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.struts2.dispatcher.filter; |
| |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| import org.apache.struts2.RequestUtils; |
| import org.apache.struts2.StrutsStatics; |
| import org.apache.struts2.dispatcher.Dispatcher; |
| import org.apache.struts2.dispatcher.ExecuteOperations; |
| import org.apache.struts2.dispatcher.InitOperations; |
| import org.apache.struts2.dispatcher.PrepareOperations; |
| import org.apache.struts2.dispatcher.mapper.ActionMapping; |
| |
| import javax.servlet.Filter; |
| import javax.servlet.FilterChain; |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Handles both the preparation and execution phases of the Struts dispatching process. This filter is better to use |
| * when you don't have another filter that needs access to action context information, such as Sitemesh. |
| */ |
| public class StrutsPrepareAndExecuteFilter implements StrutsStatics, Filter { |
| |
| private static final Logger LOG = LogManager.getLogger(StrutsPrepareAndExecuteFilter.class); |
| |
| protected PrepareOperations prepare; |
| protected ExecuteOperations execute; |
| |
| /** |
| * @deprecated since 6.4.0, use {@link Dispatcher#getActionExcludedPatterns} or |
| * {@link PrepareOperations#isUrlExcluded(HttpServletRequest)} instead. |
| */ |
| @Deprecated |
| protected List<Pattern> excludedPatterns; |
| |
| public void init(FilterConfig filterConfig) throws ServletException { |
| InitOperations init = createInitOperations(); |
| Dispatcher dispatcher = null; |
| try { |
| FilterHostConfig config = new FilterHostConfig(filterConfig); |
| dispatcher = init.initDispatcher(config); |
| init.initStaticContentLoader(config, dispatcher); |
| |
| prepare = createPrepareOperations(dispatcher); |
| execute = createExecuteOperations(dispatcher); |
| |
| this.excludedPatterns = init.buildExcludedPatternsList(dispatcher); |
| |
| postInit(dispatcher, filterConfig); |
| } finally { |
| if (dispatcher != null) { |
| dispatcher.cleanUpAfterInit(); |
| } |
| init.cleanup(); |
| } |
| } |
| |
| /** |
| * Creates a new instance of {@link InitOperations} to be used during |
| * initialising {@link Dispatcher} |
| * |
| * @return instance of {@link InitOperations} |
| */ |
| protected InitOperations createInitOperations() { |
| return new InitOperations(); |
| } |
| |
| /** |
| * Creates a new instance of {@link PrepareOperations} to be used during |
| * initialising {@link Dispatcher} |
| * |
| * @return instance of {@link PrepareOperations} |
| */ |
| protected PrepareOperations createPrepareOperations(Dispatcher dispatcher) { |
| return new PrepareOperations(dispatcher); |
| } |
| |
| /** |
| * Creates a new instance of {@link ExecuteOperations} to be used during |
| * initialising {@link Dispatcher} |
| * |
| * @return instance of {@link ExecuteOperations} |
| */ |
| protected ExecuteOperations createExecuteOperations(Dispatcher dispatcher) { |
| return new ExecuteOperations(dispatcher); |
| } |
| |
| /** |
| * Callback for post initialization |
| * |
| * @param dispatcher the dispatcher |
| * @param filterConfig the filter config |
| */ |
| protected void postInit(Dispatcher dispatcher, FilterConfig filterConfig) { |
| } |
| |
| public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException { |
| |
| HttpServletRequest request = (HttpServletRequest) req; |
| HttpServletResponse response = (HttpServletResponse) res; |
| |
| try { |
| prepare.trackRecursion(request); |
| String uri = RequestUtils.getUri(request); |
| if (prepare.isUrlExcluded(request)) { |
| LOG.trace("Request: {} is excluded from handling by Struts, passing request to other filters", uri); |
| chain.doFilter(request, response); |
| } else { |
| tryHandleRequest(chain, request, response, uri); |
| } |
| } finally { |
| prepare.cleanupRequest(request); |
| } |
| } |
| |
| private void tryHandleRequest(FilterChain chain, HttpServletRequest request, HttpServletResponse response, String uri) throws IOException, ServletException { |
| LOG.trace("Checking if: {} is a static resource", uri); |
| boolean handled = execute.executeStaticResourceRequest(request, response); |
| if (!handled) { |
| LOG.trace("Uri: {} is not a static resource, assuming action", uri); |
| handleRequest(chain, request, response, uri); |
| } |
| } |
| |
| private void handleRequest(FilterChain chain, HttpServletRequest request, HttpServletResponse response, String uri) throws ServletException, IOException { |
| prepare.setEncodingAndLocale(request, response); |
| prepare.createActionContext(request, response); |
| prepare.assignDispatcherToThread(); |
| |
| HttpServletRequest wrappedRequest = prepare.wrapRequest(request); |
| try { |
| ActionMapping mapping = prepare.findActionMapping(wrappedRequest, response, true); |
| if (mapping == null) { |
| LOG.trace("Cannot find mapping for: {}, passing to other filters", uri); |
| chain.doFilter(request, response); |
| } else { |
| LOG.trace("Found mapping: {} for: {}", mapping, uri); |
| execute.executeAction(wrappedRequest, response, mapping); |
| } |
| } finally { |
| prepare.cleanupWrappedRequest(wrappedRequest); |
| } |
| } |
| |
| public void destroy() { |
| prepare.cleanupDispatcher(); |
| } |
| |
| } |