| /* |
| * 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.jena.fuseki.servlets; |
| |
| import java.io.IOException; |
| import java.util.function.Predicate; |
| |
| import javax.servlet.*; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.jena.fuseki.Fuseki; |
| import org.apache.jena.web.HttpSC; |
| import org.eclipse.jetty.security.SecurityHandler; |
| |
| /** |
| * Servlet filter that applies a predicate to incoming requests and rejects with with 403 |
| * "Forbidden" if the predicate returns false, otherwise it passes the request down the |
| * filter chain. |
| * <p> |
| * Either the user from {@link HttpServletRequest#getRemoteUser() getRemoteUser} is null, |
| * no authentication, or it has been validated. Failed authentication will have been |
| * handled and rejected by the {@link SecurityHandler security handler} before they get to |
| * the filter chain. |
| */ |
| public class AuthFilter implements Filter { |
| |
| private final Predicate<String> predicate; |
| |
| public AuthFilter(Predicate<String> allowAccess) { |
| predicate = allowAccess; |
| } |
| |
| @Override |
| public void doFilter(ServletRequest request, ServletResponse response, FilterChain filter) throws IOException, ServletException { |
| try { |
| HttpServletRequest httpRequest = (HttpServletRequest)request; |
| HttpServletResponse httpResponse = (HttpServletResponse)response; |
| String user = httpRequest.getRemoteUser(); |
| boolean allowed = predicate.test(user); |
| if ( !allowed ) { |
| // No action id allocated this early. |
| // Fuseki.actionLog.info("Response 403: "+httpRequest.getRequestURI()); |
| httpResponse.sendError(HttpSC.FORBIDDEN_403); |
| return; |
| } |
| // HTTP only. |
| filter.doFilter(httpRequest, httpResponse); |
| } catch (ClassCastException ex) { |
| Fuseki.actionLog.error(ex.getMessage()); |
| } |
| } |
| |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException {} |
| |
| @Override |
| public void destroy() {} |
| } |