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1 /* |
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2 * ==================================================================== |
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3 * Licensed to the Apache Software Foundation (ASF) under one |
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4 * or more contributor license agreements. See the NOTICE file |
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5 * distributed with this work for additional information |
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6 * regarding copyright ownership. The ASF licenses this file |
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7 * to you under the Apache License, Version 2.0 (the |
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8 * "License"); you may not use this file except in compliance |
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9 * with the License. You may obtain a copy of the License at |
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10 * |
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11 * http://www.apache.org/licenses/LICENSE-2.0 |
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12 * |
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13 * Unless required by applicable law or agreed to in writing, |
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14 * software distributed under the License is distributed on an |
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15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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16 * KIND, either express or implied. See the License for the |
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17 * specific language governing permissions and limitations |
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18 * under the License. |
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19 * ==================================================================== |
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20 * |
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21 * This software consists of voluntary contributions made by many |
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22 * individuals on behalf of the Apache Software Foundation. For more |
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23 * information on the Apache Software Foundation, please see |
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24 * <http://www.apache.org/>. |
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25 * |
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26 */ |
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27 |
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28 package ch.boye.httpclientandroidlib.client.protocol; |
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29 |
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30 import java.io.IOException; |
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31 |
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32 import ch.boye.httpclientandroidlib.annotation.Immutable; |
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33 |
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34 import ch.boye.httpclientandroidlib.androidextra.HttpClientAndroidLog; |
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35 /* LogFactory removed by HttpClient for Android script. */ |
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36 import ch.boye.httpclientandroidlib.Header; |
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37 import ch.boye.httpclientandroidlib.HttpException; |
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38 import ch.boye.httpclientandroidlib.HttpRequest; |
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39 import ch.boye.httpclientandroidlib.HttpRequestInterceptor; |
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40 import ch.boye.httpclientandroidlib.auth.AUTH; |
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41 import ch.boye.httpclientandroidlib.auth.AuthScheme; |
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42 import ch.boye.httpclientandroidlib.auth.AuthState; |
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43 import ch.boye.httpclientandroidlib.auth.AuthenticationException; |
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44 import ch.boye.httpclientandroidlib.auth.ContextAwareAuthScheme; |
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45 import ch.boye.httpclientandroidlib.auth.Credentials; |
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46 import ch.boye.httpclientandroidlib.conn.HttpRoutedConnection; |
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47 import ch.boye.httpclientandroidlib.conn.routing.HttpRoute; |
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48 import ch.boye.httpclientandroidlib.protocol.ExecutionContext; |
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49 import ch.boye.httpclientandroidlib.protocol.HttpContext; |
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50 |
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51 /** |
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52 * Generates authentication header for the proxy host, if required, |
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53 * based on the actual state of the HTTP authentication context. |
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54 * |
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55 * @since 4.0 |
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56 */ |
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57 @Immutable |
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58 public class RequestProxyAuthentication implements HttpRequestInterceptor { |
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59 |
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60 public HttpClientAndroidLog log = new HttpClientAndroidLog(getClass()); |
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61 |
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62 public RequestProxyAuthentication() { |
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63 super(); |
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64 } |
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65 |
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66 @SuppressWarnings("deprecation") |
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67 public void process(final HttpRequest request, final HttpContext context) |
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68 throws HttpException, IOException { |
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69 if (request == null) { |
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70 throw new IllegalArgumentException("HTTP request may not be null"); |
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71 } |
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72 if (context == null) { |
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73 throw new IllegalArgumentException("HTTP context may not be null"); |
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74 } |
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75 |
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76 if (request.containsHeader(AUTH.PROXY_AUTH_RESP)) { |
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77 return; |
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78 } |
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79 |
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80 HttpRoutedConnection conn = (HttpRoutedConnection) context.getAttribute( |
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81 ExecutionContext.HTTP_CONNECTION); |
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82 if (conn == null) { |
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83 this.log.debug("HTTP connection not set in the context"); |
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84 return; |
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85 } |
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86 HttpRoute route = conn.getRoute(); |
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87 if (route.isTunnelled()) { |
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88 return; |
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89 } |
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90 |
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91 // Obtain authentication state |
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92 AuthState authState = (AuthState) context.getAttribute( |
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93 ClientContext.PROXY_AUTH_STATE); |
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94 if (authState == null) { |
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95 this.log.debug("Proxy auth state not set in the context"); |
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96 return; |
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97 } |
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98 |
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99 AuthScheme authScheme = authState.getAuthScheme(); |
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100 if (authScheme == null) { |
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101 return; |
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102 } |
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103 |
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104 Credentials creds = authState.getCredentials(); |
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105 if (creds == null) { |
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106 this.log.debug("User credentials not available"); |
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107 return; |
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108 } |
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109 if (authState.getAuthScope() != null || !authScheme.isConnectionBased()) { |
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110 try { |
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111 Header header; |
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112 if (authScheme instanceof ContextAwareAuthScheme) { |
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113 header = ((ContextAwareAuthScheme) authScheme).authenticate( |
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114 creds, request, context); |
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115 } else { |
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116 header = authScheme.authenticate(creds, request); |
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117 } |
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118 request.addHeader(header); |
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119 } catch (AuthenticationException ex) { |
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120 if (this.log.isErrorEnabled()) { |
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121 this.log.error("Proxy authentication error: " + ex.getMessage()); |
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122 } |
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123 } |
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124 } |
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125 } |
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126 |
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127 } |