| /* |
| * 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 java.io.UnsupportedEncodingException; |
| 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 org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| |
| /** |
| * Entry point filter for all requests. This filter ensures that the request |
| * encoding is set to UTF-8 before any other processing forces request parsing |
| * using a default encoding. It also syncs up the Struts and JSTL locales. |
| * This filter should normally be first in the chain. |
| * |
| * @author <a href="mailto:anil@busybuddha.org">Anil Gangolli</a> |
| */ |
| public class CharEncodingFilter implements Filter { |
| |
| private static Log mLogger = |
| LogFactory.getFactory().getInstance(CharEncodingFilter.class); |
| |
| /** |
| * init |
| */ |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException { |
| } |
| |
| /** |
| * destroy |
| */ |
| @Override |
| public void destroy() { |
| } |
| |
| /** |
| * Set the character encoding and sync up Struts and JSTL locales. This filter should normally be first (and last) |
| * in the chain. |
| */ |
| public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) |
| throws IOException, ServletException { |
| if (mLogger.isDebugEnabled()) { |
| mLogger.debug("Processing CharEncodingFilter"); |
| } |
| try { |
| if (!"UTF-8".equals(req.getCharacterEncoding())) { |
| // only set encoding if not already UTF-8 |
| // despite the fact that this is the first filter in the chain, on Glassfish it |
| // is already too late to set request encoding without getting a WARN level log message |
| req.setCharacterEncoding("UTF-8"); |
| } |
| if (mLogger.isDebugEnabled()) { |
| mLogger.debug("Set request character encoding to UTF-8"); |
| } |
| |
| } catch (UnsupportedEncodingException e) { |
| // This should never happen since UTF-8 is a Java-specified required encoding. |
| throw new ServletException("Can't set incoming encoding to UTF-8"); |
| } |
| |
| chain.doFilter(req, res); |
| } |
| |
| } |