The Tor Browser: mobile/android/thirdparty/ch/boye/httpclientandroidlib/protocol/RequestExpectContinue.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.protocol;

    30 import java.io.IOException;

    32 import ch.boye.httpclientandroidlib.HttpEntity;

    33 import ch.boye.httpclientandroidlib.HttpEntityEnclosingRequest;

    34 import ch.boye.httpclientandroidlib.HttpException;

    35 import ch.boye.httpclientandroidlib.HttpRequest;

    36 import ch.boye.httpclientandroidlib.HttpRequestInterceptor;

    37 import ch.boye.httpclientandroidlib.HttpVersion;

    38 import ch.boye.httpclientandroidlib.ProtocolVersion;

    39 import ch.boye.httpclientandroidlib.params.HttpProtocolParams;

    41 /**

    42  * RequestExpectContinue is responsible for enabling the 'expect-continue'

    43  * handshake by adding <code>Expect</code> header. This interceptor is

    44  * recommended for client side protocol processors.

    45  * <p>

    46  * The following parameters can be used to customize the behavior of this

    47  * class:

    48  * <ul>

    49  *  <li>{@link ch.boye.httpclientandroidlib.params.CoreProtocolPNames#USE_EXPECT_CONTINUE}</li>

    50  * </ul>

    51  *

    52  * @since 4.0

    53  */

    54 public class RequestExpectContinue implements HttpRequestInterceptor {

    56     public RequestExpectContinue() {

    57         super();

    58     }

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

    61             throws HttpException, IOException {

    62         if (request == null) {

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

    64         }

    65         if (request instanceof HttpEntityEnclosingRequest) {

    66             HttpEntity entity = ((HttpEntityEnclosingRequest)request).getEntity();

    67             // Do not send the expect header if request body is known to be empty

    68             if (entity != null && entity.getContentLength() != 0) {

    69                 ProtocolVersion ver = request.getRequestLine().getProtocolVersion();

    70                 if (HttpProtocolParams.useExpectContinue(request.getParams())

    71                         && !ver.lessEquals(HttpVersion.HTTP_1_0)) {

    72                     request.addHeader(HTTP.EXPECT_DIRECTIVE, HTTP.EXPECT_CONTINUE);

    73                 }

    74             }

    75         }

    76     }

    78 }

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