001/* 002 * ==================================================================== 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, 014 * software distributed under the License is distributed on an 015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 016 * KIND, either express or implied. See the License for the 017 * specific language governing permissions and limitations 018 * under the License. 019 * ==================================================================== 020 * 021 * This software consists of voluntary contributions made by many 022 * individuals on behalf of the Apache Software Foundation. For more 023 * information on the Apache Software Foundation, please see 024 * <http://www.apache.org/>. 025 * 026 */ 027 028package org.apache.http.impl.client; 029 030import java.util.Collection; 031 032import org.apache.http.HttpStatus; 033import org.apache.http.annotation.Contract; 034import org.apache.http.annotation.ThreadingBehavior; 035import org.apache.http.auth.AUTH; 036import org.apache.http.client.config.RequestConfig; 037 038/** 039 * Default {@link org.apache.http.client.AuthenticationStrategy} implementation 040 * for proxy host authentication. 041 * 042 * @since 4.2 043 */ 044@Contract(threading = ThreadingBehavior.IMMUTABLE) 045public class TargetAuthenticationStrategy extends AuthenticationStrategyImpl { 046 047 public static final TargetAuthenticationStrategy INSTANCE = new TargetAuthenticationStrategy(); 048 049 public TargetAuthenticationStrategy() { 050 super(HttpStatus.SC_UNAUTHORIZED, AUTH.WWW_AUTH); 051 } 052 053 @Override 054 Collection<String> getPreferredAuthSchemes(final RequestConfig config) { 055 return config.getTargetPreferredAuthSchemes(); 056 } 057 058}