1 /* 2 * ==================================================================== 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * ==================================================================== 20 * 21 * This software consists of voluntary contributions made by many 22 * individuals on behalf of the Apache Software Foundation. For more 23 * information on the Apache Software Foundation, please see 24 * <http://www.apache.org/>. 25 * 26 */ 27 28 package org.apache.http.impl.client; 29 30 import java.util.Collection; 31 32 import org.apache.http.HttpStatus; 33 import org.apache.http.annotation.Contract; 34 import org.apache.http.annotation.ThreadingBehavior; 35 import org.apache.http.auth.AUTH; 36 import org.apache.http.client.config.RequestConfig; 37 38 /** 39 * Default {@link org.apache.http.client.AuthenticationStrategy} implementation 40 * for proxy host authentication. 41 * 42 * @since 4.2 43 */ 44 @Contract(threading = ThreadingBehavior.IMMUTABLE) 45 public class ProxyAuthenticationStrategy extends AuthenticationStrategyImpl { 46 47 public static final ProxyAuthenticationStrategytrategy.html#ProxyAuthenticationStrategy">ProxyAuthenticationStrategy INSTANCE = new ProxyAuthenticationStrategy(); 48 49 public ProxyAuthenticationStrategy() { 50 super(HttpStatus.SC_PROXY_AUTHENTICATION_REQUIRED, AUTH.PROXY_AUTH); 51 } 52 53 @Override 54 Collection<String> getPreferredAuthSchemes(final RequestConfig config) { 55 return config.getProxyPreferredAuthSchemes(); 56 } 57 58 }