1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/impl/auth/AuthSchemeBase.java $ 3 * $Revision: 653867 $ 4 * $Date: 2008-05-06 11:17:29 -0700 (Tue, 06 May 2008) $ 5 * 6 * ==================================================================== 7 * 8 * Licensed to the Apache Software Foundation (ASF) under one or more 9 * contributor license agreements. See the NOTICE file distributed with 10 * this work for additional information regarding copyright ownership. 11 * The ASF licenses this file to You under the Apache License, Version 2.0 12 * (the "License"); you may not use this file except in compliance with 13 * 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, software 18 * distributed under the License is distributed on an "AS IS" BASIS, 19 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 20 * See the License for the specific language governing permissions and 21 * limitations under the License. 22 * ==================================================================== 23 * 24 * This software consists of voluntary contributions made by many 25 * individuals on behalf of the Apache Software Foundation. For more 26 * information on the Apache Software Foundation, please see 27 * <http://www.apache.org/>. 28 * 29 */ 30 31 package org.apache.http.impl.auth; 32 33 import org.apache.http.FormattedHeader; 34 import org.apache.http.Header; 35 import org.apache.http.auth.AUTH; 36 import org.apache.http.auth.AuthScheme; 37 import org.apache.http.auth.MalformedChallengeException; 38 import org.apache.http.protocol.HTTP; 39 import org.apache.http.util.CharArrayBuffer; 40 41 /** 42 * Abstract authentication scheme class that serves as a basis 43 * for all authentication schemes supported by HttpClient. This class 44 * defines the generic way of parsing an authentication challenge. It 45 * does not make any assumptions regarding the format of the challenge 46 * nor does it impose any specific way of responding to that challenge. 47 * 48 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 49 * 50 * @deprecated Please use {@link java.net.URL#openConnection} instead. 51 * Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a> 52 * for further details. 53 */ 54 @Deprecated 55 public abstract class AuthSchemeBase implements AuthScheme { 56 57 /** 58 * Flag whether authenticating against a proxy. 59 */ 60 private boolean proxy; 61 62 public AuthSchemeBase() { 63 super(); 64 } 65 66 /** 67 * Processes the given challenge token. Some authentication schemes 68 * may involve multiple challenge-response exchanges. Such schemes must be able 69 * to maintain the state information when dealing with sequential challenges 70 * 71 * @param header the challenge header 72 * 73 * @throws MalformedChallengeException is thrown if the authentication challenge 74 * is malformed 75 */ 76 public void processChallenge(final Header header) throws MalformedChallengeException { 77 if (header == null) { 78 throw new IllegalArgumentException("Header may not be null"); 79 } 80 String authheader = header.getName(); 81 if (authheader.equalsIgnoreCase(AUTH.WWW_AUTH)) { 82 this.proxy = false; 83 } else if (authheader.equalsIgnoreCase(AUTH.PROXY_AUTH)) { 84 this.proxy = true; 85 } else { 86 throw new MalformedChallengeException("Unexpected header name: " + authheader); 87 } 88 89 CharArrayBuffer buffer; 90 int pos; 91 if (header instanceof FormattedHeader) { 92 buffer = ((FormattedHeader) header).getBuffer(); 93 pos = ((FormattedHeader) header).getValuePos(); 94 } else { 95 String s = header.getValue(); 96 if (s == null) { 97 throw new MalformedChallengeException("Header value is null"); 98 } 99 buffer = new CharArrayBuffer(s.length()); 100 buffer.append(s); 101 pos = 0; 102 } 103 while (pos < buffer.length() && HTTP.isWhitespace(buffer.charAt(pos))) { 104 pos++; 105 } 106 int beginIndex = pos; 107 while (pos < buffer.length() && !HTTP.isWhitespace(buffer.charAt(pos))) { 108 pos++; 109 } 110 int endIndex = pos; 111 String s = buffer.substring(beginIndex, endIndex); 112 if (!s.equalsIgnoreCase(getSchemeName())) { 113 throw new MalformedChallengeException("Invalid scheme identifier: " + s); 114 } 115 116 parseChallenge(buffer, pos, buffer.length()); 117 } 118 119 protected abstract void parseChallenge( 120 CharArrayBuffer buffer, int pos, int len) throws MalformedChallengeException; 121 122 /** 123 * Returns <code>true</code> if authenticating against a proxy, <code>false</code> 124 * otherwise. 125 * 126 * @return <code>true</code> if authenticating against a proxy, <code>false</code> 127 * otherwise 128 */ 129 public boolean isProxy() { 130 return this.proxy; 131 } 132 133 } 134
