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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/RequestUserAgent.java $
      3  * $Revision: 496070 $
      4  * $Date: 2007-01-14 04:18:34 -0800 (Sun, 14 Jan 2007) $
      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.HttpException;
     37 import org.apache.http.HttpRequest;
     38 import org.apache.http.HttpRequestInterceptor;
     39 import org.apache.http.params.HttpProtocolParams;
     40 
     41 /**
     42  * A request interceptor that adds a User-Agent header.
     43  *
     44  * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
     45  *
     46  * @version $Revision: 496070 $
     47  *
     48  * @since 4.0
     49  *
     50  * @deprecated Please use {@link java.net.URL#openConnection} instead.
     51  *     Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a>
     52  *     for further details.
     53  */
     54 @Deprecated
     55 public class RequestUserAgent implements HttpRequestInterceptor {
     56 
     57     public RequestUserAgent() {
     58         super();
     59     }
     60 
     61     public void process(final HttpRequest request, final HttpContext context)
     62         throws HttpException, IOException {
     63         if (request == null) {
     64             throw new IllegalArgumentException("HTTP request may not be null");
     65         }
     66         if (!request.containsHeader(HTTP.USER_AGENT)) {
     67             String useragent = HttpProtocolParams.getUserAgent(request.getParams());
     68             if (useragent != null) {
     69                 request.addHeader(HTTP.USER_AGENT, useragent);
     70             }
     71         }
     72     }
     73 
     74 }
     75