content: /*
   * 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.atlas.web.filters;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.security.core.AuthenticationException;
  import org.springframework.security.web.AuthenticationEntryPoint;
  import org.springframework.security.web.authentication.DelegatingAuthenticationEntryPoint;
  import org.springframework.security.web.util.matcher.RequestMatcher;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import java.io.IOException;
  import java.util.LinkedHashMap;
  
  public class AtlasDelegatingAuthenticationEntryPoint extends DelegatingAuthenticationEntryPoint {
      private static final Logger LOG = LoggerFactory.getLogger(AtlasDelegatingAuthenticationEntryPoint.class);
  
      public static final  String SESSION_TIMEOUT = "Session Timeout";
  
      public AtlasDelegatingAuthenticationEntryPoint(LinkedHashMap<RequestMatcher, AuthenticationEntryPoint> entryPoints) {
          super(entryPoints);
  
          LOG.debug("AtlasDelegatingAuthenticationEntryPoint-AjaxAwareAuthenticationEntryPoint(): constructor");
      }
  
      public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException {
          String ajaxRequestHeader = request.getHeader(HeadersUtil.X_REQUESTED_WITH_KEY);
  
          response.setHeader(HeadersUtil.X_FRAME_OPTIONS_KEY, HeadersUtil.X_FRAME_OPTIONS_VAL);
  
          if (HeadersUtil.X_REQUESTED_WITH_VALUE.equalsIgnoreCase(ajaxRequestHeader)) {
              if (LOG.isDebugEnabled()) {
                  LOG.debug("commence() AJAX request. Authentication required. Returning {}. URL={}", HttpServletResponse.SC_UNAUTHORIZED, request.getRequestURI());
              }
  
              response.sendError(HeadersUtil.SC_AUTHENTICATION_TIMEOUT, SESSION_TIMEOUT);
          } else {
              response.sendError(HttpServletResponse.SC_UNAUTHORIZED, authException.getMessage());
          }
      }
  }
  