package org.apache.archiva.redback.integration.filter.authentication.basic;
   
   /*
    * 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.
   */
  
  import org.apache.archiva.redback.authentication.AuthenticationException;
  import org.apache.archiva.redback.integration.filter.authentication.AbstractHttpAuthenticationFilter;
  import org.apache.archiva.redback.integration.filter.authentication.HttpAuthenticator;
  
  import javax.servlet.FilterChain;
  import javax.servlet.FilterConfig;
  import javax.servlet.ServletException;
  import javax.servlet.ServletRequest;
  import javax.servlet.ServletResponse;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  
  /**
   * HttpBasicAuthenticationFilter
   *
   * @author <a href="mailto:joakim@erdfelt.com">Joakim Erdfelt</a>
   *
   */
  public class HttpBasicAuthenticationFilter
      extends AbstractHttpAuthenticationFilter
  {
      private HttpAuthenticator httpAuthentication;
  
      @Override
      public void init( FilterConfig filterConfig )
          throws ServletException
      {
          super.init( filterConfig );
  
          httpAuthentication = getApplicationContext().getBean( "httpAuthenticator#basic", HttpAuthenticator.class );
      }
  
      public void doFilter( ServletRequest request, ServletResponse response, FilterChain chain )
          throws IOException, ServletException
      {
          if ( !( request instanceof HttpServletRequest ) )
          {
              throw new ServletException( "Can only process HttpServletRequest" );
          }
  
          if ( !( response instanceof HttpServletResponse ) )
          {
              throw new ServletException( "Can only process HttpServletResponse" );
          }
  
          HttpServletRequest httpRequest = (HttpServletRequest) request;
          HttpServletResponse httpResponse = (HttpServletResponse) response;
  
          try
          {
              httpAuthentication.authenticate( httpRequest, httpResponse );
          }
          catch ( AuthenticationException e )
          {
              HttpAuthenticator httpauthn = new HttpBasicAuthentication();
              httpauthn.challenge( httpRequest, httpResponse, getRealmName(), e );
              return;
          }
  
          chain.doFilter( request, response );
      }
  }