| /* |
| * 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.security.SecureRandom; |
| import javax.servlet.*; |
| import javax.servlet.http.HttpServletRequest; |
| import org.apache.commons.lang3.RandomStringUtils; |
| import org.apache.roller.weblogger.ui.rendering.util.cache.SaltCache; |
| |
| /** |
| * Filter generates a unique salt value for use in any HTTP form generated by |
| * Roller. See also: ValidateSalt filter. |
| */ |
| public class LoadSaltFilter implements Filter { |
| |
| //@Override |
| public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) |
| throws IOException, ServletException { |
| HttpServletRequest httpReq = (HttpServletRequest) request; |
| |
| SaltCache saltCache = SaltCache.getInstance(); |
| String salt = RandomStringUtils.random(20, 0, 0, true, true, null, new SecureRandom()); |
| saltCache.put(salt, Boolean.TRUE); |
| httpReq.setAttribute("salt", salt); |
| |
| chain.doFilter(request, response); |
| } |
| |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException { |
| } |
| |
| @Override |
| public void destroy() { |
| } |
| } |