| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. 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. |
| */ |
| package org.apache.ki.web.filter.authc; |
| |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| |
| import org.apache.ki.subject.Subject; |
| import org.apache.ki.web.filter.AccessControlFilter; |
| |
| /** |
| * Filter that allows access to resources if the accessor is a known user, which is defined as |
| * having a known principal. This means that any user who is authenticated or remembered via a |
| * 'remember me' feature will be allowed access from this filter. |
| * <p/> |
| * If the accessor is not a known user, then they will be redirected to the {@link #setLoginUrl(String) loginUrl}</p> |
| * |
| * @author Jeremy Haile |
| * @author Les Hazlewood |
| * @since 0.9 |
| */ |
| public class UserFilter extends AccessControlFilter { |
| |
| /** |
| * Returns <code>true</code> if the request is a |
| * {@link #isLoginRequest(javax.servlet.ServletRequest, javax.servlet.ServletResponse) loginRequest} or |
| * if the current {@link #getSubject(javax.servlet.ServletRequest, javax.servlet.ServletResponse) subject} |
| * is not <code>null</code>, <code>false</code> otherwise. |
| * |
| * @return <code>true</code> if the request is a |
| * {@link #isLoginRequest(javax.servlet.ServletRequest, javax.servlet.ServletResponse) loginRequest} or |
| * if the current {@link #getSubject(javax.servlet.ServletRequest, javax.servlet.ServletResponse) subject} |
| * is not <code>null</code>, <code>false</code> otherwise. |
| */ |
| protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) { |
| if (isLoginRequest(request, response)) { |
| return true; |
| } else { |
| Subject subject = getSubject(request, response); |
| // If principal is not null, then the user is known and should be allowed access. |
| return subject.getPrincipal() != null; |
| } |
| } |
| |
| /** |
| * This default implementation simply calls |
| * {@link #saveRequestAndRedirectToLogin(javax.servlet.ServletRequest, javax.servlet.ServletResponse) saveRequestAndRedirectToLogin} |
| * and then immediately returns <code>false</code>, thereby preventing the chain from continuing so the redirect may |
| * execute. |
| */ |
| protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception { |
| saveRequestAndRedirectToLogin(request, response); |
| return false; |
| } |
| } |