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)42public 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