The Tor Browser / file revision

 /*

  * ====================================================================

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *   http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  * ====================================================================

  *

  * This software consists of voluntary contributions made by many

  * individuals on behalf of the Apache Software Foundation.  For more

  * information on the Apache Software Foundation, please see

  * <http://www.apache.org/>.

  *

  */

 package ch.boye.httpclientandroidlib.client.protocol;

 import java.io.IOException;

 import ch.boye.httpclientandroidlib.annotation.Immutable;

 import ch.boye.httpclientandroidlib.androidextra.HttpClientAndroidLog;

 /* LogFactory removed by HttpClient for Android script. */

 import ch.boye.httpclientandroidlib.Header;

 import ch.boye.httpclientandroidlib.HttpException;

 import ch.boye.httpclientandroidlib.HttpRequest;

 import ch.boye.httpclientandroidlib.HttpRequestInterceptor;

 import ch.boye.httpclientandroidlib.auth.AUTH;

 import ch.boye.httpclientandroidlib.auth.AuthScheme;

 import ch.boye.httpclientandroidlib.auth.AuthState;

 import ch.boye.httpclientandroidlib.auth.AuthenticationException;

 import ch.boye.httpclientandroidlib.auth.ContextAwareAuthScheme;

 import ch.boye.httpclientandroidlib.auth.Credentials;

 import ch.boye.httpclientandroidlib.conn.HttpRoutedConnection;

 import ch.boye.httpclientandroidlib.conn.routing.HttpRoute;

 import ch.boye.httpclientandroidlib.protocol.ExecutionContext;

 import ch.boye.httpclientandroidlib.protocol.HttpContext;

 /**

  * Generates authentication header for the proxy host, if required,

  * based on the actual state of the HTTP authentication context.

  *

  * @since 4.0

  */

 @Immutable

 public class RequestProxyAuthentication implements HttpRequestInterceptor {

     public HttpClientAndroidLog log = new HttpClientAndroidLog(getClass());

     public RequestProxyAuthentication() {

         super();

     }

     @SuppressWarnings("deprecation")

     public void process(final HttpRequest request, final HttpContext context)

             throws HttpException, IOException {

         if (request == null) {

             throw new IllegalArgumentException("HTTP request may not be null");

         }

         if (context == null) {

             throw new IllegalArgumentException("HTTP context may not be null");

         }

         if (request.containsHeader(AUTH.PROXY_AUTH_RESP)) {

             return;

         }

         HttpRoutedConnection conn = (HttpRoutedConnection) context.getAttribute(

                 ExecutionContext.HTTP_CONNECTION);

         if (conn == null) {

             this.log.debug("HTTP connection not set in the context");

             return;

         }

         HttpRoute route = conn.getRoute();

         if (route.isTunnelled()) {

             return;

         }

         // Obtain authentication state

         AuthState authState = (AuthState) context.getAttribute(

                 ClientContext.PROXY_AUTH_STATE);

         if (authState == null) {

             this.log.debug("Proxy auth state not set in the context");

             return;

         }

         AuthScheme authScheme = authState.getAuthScheme();

         if (authScheme == null) {

             return;

         }

         Credentials creds = authState.getCredentials();

         if (creds == null) {

             this.log.debug("User credentials not available");

             return;

         }

         if (authState.getAuthScope() != null || !authScheme.isConnectionBased()) {

             try {

                 Header header;

                 if (authScheme instanceof ContextAwareAuthScheme) {

                     header = ((ContextAwareAuthScheme) authScheme).authenticate(

                             creds, request, context);

                 } else {

                     header = authScheme.authenticate(creds, request);

                 }

                 request.addHeader(header);

             } catch (AuthenticationException ex) {

                 if (this.log.isErrorEnabled()) {

                     this.log.error("Proxy authentication error: " + ex.getMessage());

                 }

             }

         }

     }

 }