001/*
002 * (C) Copyright 2013 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Thomas Roger
018 */
019
020package org.nuxeo.dam.filter;
021
022import java.io.IOException;
023
024import javax.servlet.Filter;
025import javax.servlet.FilterChain;
026import javax.servlet.FilterConfig;
027import javax.servlet.ServletException;
028import javax.servlet.ServletRequest;
029import javax.servlet.ServletResponse;
030import javax.servlet.http.HttpServletRequest;
031
032/**
033 * Filter to redirect "/dam/icons/*" resources to "/icons/" for backward compatibility.
034 *
035 * @since 5.7
036 */
037public class DamOldResourcesFilter implements Filter {
038
039    @Override
040    public void init(FilterConfig filterConfig) throws ServletException {
041    }
042
043    @Override
044    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
045            ServletException {
046        if (request instanceof HttpServletRequest) {
047            HttpServletRequest httpServletRequest = (HttpServletRequest) request;
048            String contextPath = httpServletRequest.getContextPath();
049            String requestURI = httpServletRequest.getRequestURI();
050            requestURI = requestURI.replaceFirst(contextPath, "");
051            requestURI = requestURI.replace("/dam/icons", "/icons");
052            httpServletRequest.getRequestDispatcher(requestURI).forward(request, response);
053        }
054    }
055
056    @Override
057    public void destroy() {
058    }
059}