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      1 /*
      2  * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/ResponseConnControl.java $
      3  * $Revision: 618017 $
      4  * $Date: 2008-02-03 08:42:22 -0800 (Sun, 03 Feb 2008) $
      5  *
      6  * ====================================================================
      7  * Licensed to the Apache Software Foundation (ASF) under one
      8  * or more contributor license agreements.  See the NOTICE file
      9  * distributed with this work for additional information
     10  * regarding copyright ownership.  The ASF licenses this file
     11  * to you under the Apache License, Version 2.0 (the
     12  * "License"); you may not use this file except in compliance
     13  * with 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,
     18  * software distributed under the License is distributed on an
     19  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     20  * KIND, either express or implied.  See the License for the
     21  * specific language governing permissions and limitations
     22  * under the License.
     23  * ====================================================================
     24  *
     25  * This software consists of voluntary contributions made by many
     26  * individuals on behalf of the Apache Software Foundation.  For more
     27  * information on the Apache Software Foundation, please see
     28  * <http://www.apache.org/>.
     29  *
     30  */
     31 
     32 package org.apache.http.protocol;
     33 
     34 import java.io.IOException;
     35 
     36 import org.apache.http.Header;
     37 import org.apache.http.HttpEntity;
     38 import org.apache.http.HttpException;
     39 import org.apache.http.HttpRequest;
     40 import org.apache.http.HttpResponse;
     41 import org.apache.http.HttpResponseInterceptor;
     42 import org.apache.http.HttpStatus;
     43 import org.apache.http.HttpVersion;
     44 import org.apache.http.ProtocolVersion;
     45 
     46 /**
     47  * A response interceptor that suggests connection keep-alive to the client.
     48  * For use on the server side.
     49  *
     50  * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
     51  *
     52  * @version $Revision: 618017 $
     53  *
     54  * @since 4.0
     55  *
     56  * @deprecated Please use {@link java.net.URL#openConnection} instead.
     57  *     Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a>
     58  *     for further details.
     59  */
     60 @Deprecated
     61 public class ResponseConnControl implements HttpResponseInterceptor {
     62 
     63     public ResponseConnControl() {
     64         super();
     65     }
     66 
     67     public void process(final HttpResponse response, final HttpContext context)
     68             throws HttpException, IOException {
     69         if (response == null) {
     70             throw new IllegalArgumentException("HTTP response may not be null");
     71         }
     72         if (context == null) {
     73             throw new IllegalArgumentException("HTTP context may not be null");
     74         }
     75         // Always drop connection after certain type of responses
     76         int status = response.getStatusLine().getStatusCode();
     77         if (status == HttpStatus.SC_BAD_REQUEST ||
     78                 status == HttpStatus.SC_REQUEST_TIMEOUT ||
     79                 status == HttpStatus.SC_LENGTH_REQUIRED ||
     80                 status == HttpStatus.SC_REQUEST_TOO_LONG ||
     81                 status == HttpStatus.SC_REQUEST_URI_TOO_LONG ||
     82                 status == HttpStatus.SC_SERVICE_UNAVAILABLE ||
     83                 status == HttpStatus.SC_NOT_IMPLEMENTED) {
     84             response.setHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_CLOSE);
     85             return;
     86         }
     87         // Always drop connection for HTTP/1.0 responses and below
     88         // if the content body cannot be correctly delimited
     89         HttpEntity entity = response.getEntity();
     90         if (entity != null) {
     91             ProtocolVersion ver = response.getStatusLine().getProtocolVersion();
     92             if (entity.getContentLength() < 0 &&
     93                     (!entity.isChunked() || ver.lessEquals(HttpVersion.HTTP_1_0))) {
     94                 response.setHeader(HTTP.CONN_DIRECTIVE, HTTP.CONN_CLOSE);
     95                 return;
     96             }
     97         }
     98         // Drop connection if requested by the client
     99         HttpRequest request = (HttpRequest)
    100             context.getAttribute(ExecutionContext.HTTP_REQUEST);
    101         if (request != null) {
    102             Header header = request.getFirstHeader(HTTP.CONN_DIRECTIVE);
    103             if (header != null) {
    104                 response.setHeader(HTTP.CONN_DIRECTIVE, header.getValue());
    105             }
    106         }
    107     }
    108 
    109 }
    110