| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.mapred; |
| |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.IOUtils; |
| |
| import javax.servlet.ServletConfig; |
| import javax.servlet.ServletContext; |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| public class RawHistoryFileServlet extends HttpServlet { |
| |
| private ServletContext servletContext; |
| |
| @Override |
| public void init(ServletConfig servletConfig) throws ServletException { |
| super.init(servletConfig); |
| servletContext = servletConfig.getServletContext(); |
| } |
| |
| @Override |
| protected void doGet(HttpServletRequest request, |
| HttpServletResponse response) |
| throws ServletException, IOException { |
| |
| String logFile = request.getParameter("logFile"); |
| |
| if (logFile == null) { |
| response.sendError(HttpServletResponse.SC_BAD_REQUEST, |
| "Invalid log file name"); |
| return; |
| } |
| |
| FileSystem fs = (FileSystem) servletContext.getAttribute("fileSys"); |
| JobConf jobConf = (JobConf) servletContext.getAttribute("jobConf"); |
| ACLsManager aclsManager = (ACLsManager) servletContext.getAttribute("aclManager"); |
| Path logFilePath = new Path(logFile); |
| JobHistory.JobInfo job = null; |
| try { |
| job = JSPUtil.checkAccessAndGetJobInfo(request, |
| response, jobConf, aclsManager, fs, logFilePath); |
| } catch (InterruptedException e) { |
| response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, |
| "Request interrupted"); |
| } |
| |
| if (job == null) { |
| response.sendError(HttpServletResponse.SC_MOVED_PERMANENTLY, |
| "Job details doesn't exist"); |
| return; |
| } |
| |
| InputStream in = fs.open(logFilePath); |
| try { |
| IOUtils.copyBytes(in, response.getOutputStream(), 8192, false); |
| } finally { |
| in.close(); |
| } |
| } |
| } |