1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/client/protocol/RequestProxyAuthentication.java $ 3 * $Revision: 673450 $ 4 * $Date: 2008-07-02 10:35:05 -0700 (Wed, 02 Jul 2008) $ 5 * 6 * ==================================================================== 7 * Licensed to the Apache Software Foundation (ASF) under one 8 * or more contributor license agreements. See the NOTICE file 9 * distributed with this work for additional information 10 * regarding copyright ownership. The ASF licenses this file 11 * to you under the Apache License, Version 2.0 (the 12 * "License"); you may not use this file except in compliance 13 * with the License. You may obtain a copy of the License at 14 * 15 * http://www.apache.org/licenses/LICENSE-2.0 16 * 17 * Unless required by applicable law or agreed to in writing, 18 * software distributed under the License is distributed on an 19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 20 * KIND, either express or implied. See the License for the 21 * specific language governing permissions and limitations 22 * under the License. 23 * ==================================================================== 24 * 25 * This software consists of voluntary contributions made by many 26 * individuals on behalf of the Apache Software Foundation. For more 27 * information on the Apache Software Foundation, please see 28 * <http://www.apache.org/>. 29 * 30 */ 31 32 package org.apache.http.client.protocol; 33 34 import java.io.IOException; 35 36 import org.apache.commons.logging.Log; 37 import org.apache.commons.logging.LogFactory; 38 import org.apache.http.HttpException; 39 import org.apache.http.HttpRequest; 40 import org.apache.http.HttpRequestInterceptor; 41 import org.apache.http.auth.AUTH; 42 import org.apache.http.auth.AuthScheme; 43 import org.apache.http.auth.AuthState; 44 import org.apache.http.auth.AuthenticationException; 45 import org.apache.http.auth.Credentials; 46 import org.apache.http.protocol.HttpContext; 47 48 /** 49 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 50 * 51 * @version $Revision: 673450 $ 52 * 53 * @since 4.0 54 */ 55 public class RequestProxyAuthentication implements HttpRequestInterceptor { 56 57 private final Log log = LogFactory.getLog(getClass()); 58 RequestProxyAuthentication()59 public RequestProxyAuthentication() { 60 super(); 61 } 62 process(final HttpRequest request, final HttpContext context)63 public void process(final HttpRequest request, final HttpContext context) 64 throws HttpException, IOException { 65 if (request == null) { 66 throw new IllegalArgumentException("HTTP request may not be null"); 67 } 68 if (context == null) { 69 throw new IllegalArgumentException("HTTP context may not be null"); 70 } 71 72 if (request.containsHeader(AUTH.PROXY_AUTH_RESP)) { 73 return; 74 } 75 76 // Obtain authentication state 77 AuthState authState = (AuthState) context.getAttribute( 78 ClientContext.PROXY_AUTH_STATE); 79 if (authState == null) { 80 return; 81 } 82 83 AuthScheme authScheme = authState.getAuthScheme(); 84 if (authScheme == null) { 85 return; 86 } 87 88 Credentials creds = authState.getCredentials(); 89 if (creds == null) { 90 this.log.debug("User credentials not available"); 91 return; 92 } 93 if (authState.getAuthScope() != null || !authScheme.isConnectionBased()) { 94 try { 95 request.addHeader(authScheme.authenticate(creds, request)); 96 } catch (AuthenticationException ex) { 97 if (this.log.isErrorEnabled()) { 98 this.log.error("Proxy authentication error: " + ex.getMessage()); 99 } 100 } 101 } 102 } 103 104 } 105