The Tor Browser: mobile/android/thirdparty/ch/boye/httpclientandroidlib/client/protocol/RequestClientConnControl.java@fc2d59ddac77

     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  */

    28 package ch.boye.httpclientandroidlib.client.protocol;

    30 import java.io.IOException;

    32 import ch.boye.httpclientandroidlib.androidextra.HttpClientAndroidLog;

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

    34 import ch.boye.httpclientandroidlib.annotation.Immutable;

    36 import ch.boye.httpclientandroidlib.HttpException;

    37 import ch.boye.httpclientandroidlib.HttpRequest;

    38 import ch.boye.httpclientandroidlib.HttpRequestInterceptor;

    39 import ch.boye.httpclientandroidlib.conn.HttpRoutedConnection;

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

    41 import ch.boye.httpclientandroidlib.protocol.ExecutionContext;

    42 import ch.boye.httpclientandroidlib.protocol.HTTP;

    43 import ch.boye.httpclientandroidlib.protocol.HttpContext;

    45 /**

    46  * This protocol interceptor is responsible for adding <code>Connection</code>

    47  * or <code>Proxy-Connection</code> headers to the outgoing requests, which

    48  * is essential for managing persistence of <code>HTTP/1.0</code> connections.

    49  *

    50  * @since 4.0

    51  */

    52 @Immutable

    53 public class RequestClientConnControl implements HttpRequestInterceptor {

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

    57     private static final String PROXY_CONN_DIRECTIVE = "Proxy-Connection";

    59     public RequestClientConnControl() {

    60         super();

    61     }

    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         }

    69         String method = request.getRequestLine().getMethod();

    70         if (method.equalsIgnoreCase("CONNECT")) {

    71             request.setHeader(PROXY_CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE);

    72             return;

    73         }

    75         // Obtain the client connection (required)

    76         HttpRoutedConnection conn = (HttpRoutedConnection) context.getAttribute(

    77                 ExecutionContext.HTTP_CONNECTION);

    78         if (conn == null) {

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

    80             return;

    81         }

    83         HttpRoute route = conn.getRoute();

    85         if (route.getHopCount() == 1 || route.isTunnelled()) {

    86             if (!request.containsHeader(HTTP.CONN_DIRECTIVE)) {

    87                 request.addHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE);

    88             }

    89         }

    90         if (route.getHopCount() == 2 && !route.isTunnelled()) {

    91             if (!request.containsHeader(PROXY_CONN_DIRECTIVE)) {

    92                 request.addHeader(PROXY_CONN_DIRECTIVE, HTTP.CONN_KEEP_ALIVE);

    93             }

    94         }

    95     }

    97 }

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