package org.apache.maven.wagon.tck.http.fixture;
   
   /*
    * 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.commons.codec.binary.Base64;
  
  import java.io.IOException;
  
  import javax.servlet.Filter;
  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;
  
  /**
   * 
   */
  public class ProxyAuthenticationFilter
      implements Filter
  {
  
      private final String username;
  
      private final String password;
  
      public ProxyAuthenticationFilter( final String username, final String password )
      {
          this.username = username;
          this.password = password;
      }
  
      public void destroy()
      {
      }
  
      public void doFilter( final ServletRequest req, final ServletResponse resp, final FilterChain chain )
          throws IOException, ServletException
      {
          HttpServletRequest request = (HttpServletRequest) req;
          HttpServletResponse response = (HttpServletResponse) resp;
  
          String header = request.getHeader( "Proxy-Authorization" );
          if ( header == null )
          {
              response.setStatus( HttpServletResponse.SC_PROXY_AUTHENTICATION_REQUIRED );
              response.addHeader( "Proxy-Authenticate", "Basic realm=\"Squid proxy-caching web server\"" );
              return;
          }
          else
          {
              String data = header.substring( "BASIC ".length() );
              data = new String( Base64.decodeBase64( data ) );
              String[] creds = data.split( ":" );
  
              if ( !creds[0].equals( username ) || !creds[1].equals( password ) )
              {
                  response.sendError( HttpServletResponse.SC_UNAUTHORIZED );
              }
          }
  
          chain.doFilter( req, resp );
      }
  
      public void init( final FilterConfig filterConfig )
          throws ServletException
      {
      }
  
  }