//
   //  ========================================================================
   //  Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
   //  ------------------------------------------------------------------------
   //  All rights reserved. This program and the accompanying materials
   //  are made available under the terms of the Eclipse Public License v1.0
   //  and Apache License v2.0 which accompanies this distribution.
   //
   //      The Eclipse Public License is available at
  //      http://www.eclipse.org/legal/epl-v10.html
  //
  //      The Apache License v2.0 is available at
  //      http://www.opensource.org/licenses/apache2.0.php
  //
  //  You may elect to redistribute this code under either of these licenses.
  //  ========================================================================
  //
  
  package org.eclipse.jetty.client;
  
  import java.net.URI;
  
  import org.eclipse.jetty.client.api.Request;
  import org.eclipse.jetty.client.api.Response;
  import org.eclipse.jetty.http.HttpHeader;
  import org.eclipse.jetty.http.HttpStatus;
  
  /**
   * <p>A protocol handler that handles the 401 response code
   * in association with the {@code Proxy-Authenticate} header.</p>
   *
   * @see WWWAuthenticationProtocolHandler
   */
  public class ProxyAuthenticationProtocolHandler extends AuthenticationProtocolHandler
  {
      public static final String NAME = "proxy-authenticate";
      private static final String ATTRIBUTE = ProxyAuthenticationProtocolHandler.class.getName() + ".attribute";
  
      public ProxyAuthenticationProtocolHandler(HttpClient client)
      {
          this(client, DEFAULT_MAX_CONTENT_LENGTH);
      }
  
      public ProxyAuthenticationProtocolHandler(HttpClient client, int maxContentLength)
      {
          super(client, maxContentLength);
      }
  
      @Override
      public String getName()
      {
          return NAME;
      }
  
      @Override
      public boolean accept(Request request, Response response)
      {
          return response.getStatus() == HttpStatus.PROXY_AUTHENTICATION_REQUIRED_407;
      }
  
      @Override
      protected HttpHeader getAuthenticateHeader()
      {
          return HttpHeader.PROXY_AUTHENTICATE;
      }
  
      @Override
      protected HttpHeader getAuthorizationHeader()
      {
          return HttpHeader.PROXY_AUTHORIZATION;
      }
  
      @Override
      protected URI getAuthenticationURI(Request request)
      {
          HttpDestination destination = getHttpClient().destinationFor(request.getScheme(), request.getHost(), request.getPort());
          ProxyConfiguration.Proxy proxy = destination.getProxy();
          return proxy != null ? proxy.getURI() : request.getURI();
      }
  
      @Override
      protected String getAuthenticationAttribute()
      {
          return ATTRIBUTE;
      }
  }