001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.servlet;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.security.pacl.DoPrivileged;
020    import com.liferay.portal.kernel.servlet.DirectRequestDispatcherFactory;
021    import com.liferay.portal.kernel.servlet.DirectServletRegistryUtil;
022    import com.liferay.portal.kernel.util.CharPool;
023    import com.liferay.portal.kernel.util.ContextPathUtil;
024    import com.liferay.portal.kernel.util.WebKeys;
025    import com.liferay.portal.util.PropsValues;
026    
027    import javax.servlet.RequestDispatcher;
028    import javax.servlet.Servlet;
029    import javax.servlet.ServletContext;
030    import javax.servlet.ServletRequest;
031    
032    /**
033     * @author Raymond Augé
034     * @author Shuyang Zhou
035     */
036    @DoPrivileged
037    public class DirectRequestDispatcherFactoryImpl
038            implements DirectRequestDispatcherFactory {
039    
040            public RequestDispatcher getRequestDispatcher(
041                    ServletContext servletContext, String path) {
042    
043                    RequestDispatcher requestDispatcher = doGetRequestDispatcher(
044                            servletContext, path);
045    
046                    return new ClassLoaderRequestDispatcherWrapper(
047                            servletContext, requestDispatcher);
048            }
049    
050            public RequestDispatcher getRequestDispatcher(
051                    ServletRequest servletRequest, String path) {
052    
053                    if (!PropsValues.DIRECT_SERVLET_CONTEXT_ENABLED) {
054                            return servletRequest.getRequestDispatcher(path);
055                    }
056    
057                    ServletContext servletContext =
058                            (ServletContext)servletRequest.getAttribute(WebKeys.CTX);
059    
060                    if (servletContext == null) {
061                            throw new IllegalStateException(
062                                    "Cannot find servlet context in request attributes");
063                    }
064    
065                    return getRequestDispatcher(servletContext, path);
066            }
067    
068            protected RequestDispatcher doGetRequestDispatcher(
069                    ServletContext servletContext, String path) {
070    
071                    if (!PropsValues.DIRECT_SERVLET_CONTEXT_ENABLED) {
072                            return servletContext.getRequestDispatcher(path);
073                    }
074    
075                    if ((path == null) || (path.length() == 0)) {
076                            return null;
077                    }
078    
079                    if (path.charAt(0) != CharPool.SLASH) {
080                            throw new IllegalArgumentException(
081                                    "Path " + path + " is not relative to context root");
082                    }
083    
084                    String contextPath = ContextPathUtil.getContextPath(servletContext);
085    
086                    String fullPath = contextPath.concat(path);
087                    String queryString = null;
088    
089                    int pos = fullPath.indexOf(CharPool.QUESTION);
090    
091                    if (pos != -1) {
092                            queryString = fullPath.substring(pos + 1);
093    
094                            fullPath = fullPath.substring(0, pos);
095                    }
096    
097                    Servlet servlet = DirectServletRegistryUtil.getServlet(fullPath);
098    
099                    RequestDispatcher requestDispatcher = null;
100    
101                    if (servlet == null) {
102                            if (_log.isDebugEnabled()) {
103                                    _log.debug("No servlet found for " + fullPath);
104                            }
105    
106                            requestDispatcher = servletContext.getRequestDispatcher(path);
107    
108                            requestDispatcher = new DirectServletPathRegisterDispatcher(
109                                    path, requestDispatcher);
110                    }
111                    else {
112                            if (_log.isDebugEnabled()) {
113                                    _log.debug("Servlet found for " + fullPath);
114                            }
115    
116                            requestDispatcher = new DirectRequestDispatcher(
117                                    servlet, queryString);
118                    }
119    
120                    return _pacl.getRequestDispatcher(servletContext, requestDispatcher);
121            }
122    
123            private static Log _log = LogFactoryUtil.getLog(
124                    DirectRequestDispatcherFactoryImpl.class);
125    
126            private static PACL _pacl = new NoPACL();
127    
128            private static class NoPACL implements PACL {
129    
130                    public RequestDispatcher getRequestDispatcher(
131                            ServletContext servletContext,
132                            RequestDispatcher requestDispatcher) {
133    
134                            return requestDispatcher;
135                    }
136    
137            }
138    
139            public static interface PACL {
140    
141                    public RequestDispatcher getRequestDispatcher(
142                            ServletContext servletContext, RequestDispatcher requestDispatcher);
143    
144            }
145    
146    }