//
   //  ========================================================================
   //  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.util;
  
  import java.net.URI;
  import java.nio.charset.StandardCharsets;
  
  import org.eclipse.jetty.client.HttpClient;
  import org.eclipse.jetty.client.api.Authentication;
  import org.eclipse.jetty.client.api.AuthenticationStore;
  import org.eclipse.jetty.client.api.ContentResponse;
  import org.eclipse.jetty.client.api.Request;
  import org.eclipse.jetty.http.HttpHeader;
  import org.eclipse.jetty.util.Attributes;
  import org.eclipse.jetty.util.B64Code;
  
  /**
   * Implementation of the HTTP "Basic" authentication defined in RFC 2617.
   * <p>
   * Applications should create objects of this class and add them to the
   * {@link AuthenticationStore} retrieved from the {@link HttpClient}
   * via {@link HttpClient#getAuthenticationStore()}.
   */
  public class BasicAuthentication implements Authentication
  {
      private final URI uri;
      private final String realm;
      private final String user;
      private final String password;
  
      /**
       * @param uri the URI to match for the authentication
       * @param realm the realm to match for the authentication
       * @param user the user that wants to authenticate
       * @param password the password of the user
       */
      public BasicAuthentication(URI uri, String realm, String user, String password)
      {
          this.uri = uri;
          this.realm = realm;
          this.user = user;
          this.password = password;
      }
  
      @Override
      public boolean matches(String type, URI uri, String realm)
      {
          if (!"basic".equalsIgnoreCase(type))
              return false;
  
          if (!uri.toString().startsWith(this.uri.toString()))
              return false;
  
          return this.realm.equals(realm);
      }
  
      @Override
      public Result authenticate(Request request, ContentResponse response, HeaderInfo headerInfo, Attributes context)
      {
          String value = "Basic " + B64Code.encode(user + ":" + password, StandardCharsets.ISO_8859_1);
          return new BasicResult(headerInfo.getHeader(), uri, value);
      }
  
      private static class BasicResult implements Result
      {
          private final HttpHeader header;
          private final URI uri;
          private final String value;
  
          public BasicResult(HttpHeader header, URI uri, String value)
          {
              this.header = header;
              this.uri = uri;
              this.value = value;
          }
  
          @Override
          public URI getURI()
          {
              return uri;
          }
  
          @Override
         public void apply(Request request)
         {
             request.header(header, value);
         }
 
         @Override
         public String toString()
         {
             return String.format("Basic authentication result for %s", uri);
         }
     }
 }