| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. 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. For additional information regarding |
| * copyright in this work, please see the NOTICE file in the top level |
| * directory of this distribution. |
| */ |
| |
| package org.apache.roller.weblogger.ui.core.filters; |
| |
| import java.io.IOException; |
| |
| 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 org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.roller.weblogger.config.WebloggerRuntimeConfig; |
| |
| /** |
| * A special initialization filter which ensures that we have an opportunity to |
| * extract a few pieces of information about the environment we are running in |
| * when the first request is sent. |
| * |
| * @web.filter name="InitFilter" |
| */ |
| public class InitFilter implements Filter { |
| |
| private static Log log = LogFactory.getLog(InitFilter.class); |
| |
| private boolean initialized = false; |
| |
| public void doFilter(ServletRequest req, ServletResponse res, |
| FilterChain chain) throws IOException, ServletException { |
| |
| if (!initialized) { |
| |
| // first request, lets do our initialization |
| HttpServletRequest request = (HttpServletRequest) req; |
| // HttpServletResponse response = (HttpServletResponse) res; |
| |
| // determine absolute and relative url paths to the app |
| String relPath = request.getContextPath(); |
| String absPath = this.getAbsoluteUrl(request); |
| |
| // set them in our config |
| WebloggerRuntimeConfig.setAbsoluteContextURL(absPath); |
| WebloggerRuntimeConfig.setRelativeContextURL(relPath); |
| |
| if (log.isDebugEnabled()) { |
| log.debug("relPath = " + relPath); |
| log.debug("absPath = " + absPath); |
| } |
| |
| this.initialized = true; |
| } |
| |
| chain.doFilter(req, res); |
| } |
| |
| private String getAbsoluteUrl(HttpServletRequest request) { |
| return getAbsoluteUrl(request.isSecure(), |
| request.getServerName(), request.getContextPath(), |
| request.getRequestURI(), request.getRequestURL().toString()); |
| } |
| |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException { |
| } |
| |
| @Override |
| public void destroy() { |
| } |
| |
| protected static String getAbsoluteUrl(boolean secure, String serverName, String contextPath, String requestURI, String requestURL){ |
| |
| String url = null; |
| |
| String fullUrl = null; |
| |
| if (!secure) { |
| fullUrl = requestURL; |
| } else { |
| fullUrl = "http://" + serverName + contextPath; |
| } |
| |
| // if the uri is only "/" then we are basically done |
| if ("/".equals(requestURI)) { |
| if (log.isDebugEnabled()) { |
| log.debug("requestURI is only '/'. fullUrl: " + fullUrl); |
| } |
| return removeTrailingSlash(fullUrl); |
| } |
| |
| // find first "/" starting after hostname is specified |
| int index = fullUrl.indexOf('/', |
| fullUrl.indexOf(serverName)); |
| |
| if (index != -1) { |
| // extract just the part leading up to uri |
| url = fullUrl.substring(0, index); |
| } else { |
| url = fullUrl.trim(); |
| } |
| |
| // then just add on the context path |
| url += contextPath; |
| |
| // make certain that we don't end with a / |
| return removeTrailingSlash(url); |
| } |
| |
| protected static String removeTrailingSlash(String url) { |
| if (url.endsWith("/")) { |
| return url.substring(0, url.length() - 1); |
| } |
| return url; |
| } |
| } |