1 /**
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements.  See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership.  The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License.  You may obtain a copy of the License at
9 *
10 *     http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 
19 package org.apache.hadoop.yarn.webapp;
20 
21 import java.io.IOException;
22 
23 import javax.servlet.RequestDispatcher;
24 import javax.servlet.ServletException;
25 import javax.servlet.http.HttpServlet;
26 import javax.servlet.http.HttpServletRequest;
27 import javax.servlet.http.HttpServletRequestWrapper;
28 import javax.servlet.http.HttpServletResponse;
29 
30 import org.apache.hadoop.classification.InterfaceAudience;
31 import org.apache.hadoop.classification.InterfaceAudience.Private;
32 
33 import com.google.inject.Singleton;
34 
35 @InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
36 @Singleton
37 public class DefaultWrapperServlet extends HttpServlet {
38 
39 private static final long serialVersionUID = 1L;
40 
41 @Private
doGet(HttpServletRequest req, HttpServletResponse resp)42 public void doGet(HttpServletRequest req, HttpServletResponse resp)
43 throws ServletException, IOException {
44   RequestDispatcher rd = getServletContext().getNamedDispatcher("default");
45 
46   HttpServletRequest wrapped = new HttpServletRequestWrapper(req) {
47     public String getServletPath() {
48     return "";
49     }
50   };
51 
52   rd.forward(wrapped, resp);
53   }
54 
55 }
56