001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019package org.apache.hadoop.fs.http.server; 020 021 022import org.apache.hadoop.classification.InterfaceAudience; 023import org.apache.hadoop.fs.http.client.HttpFSFileSystem; 024 025import javax.servlet.Filter; 026import javax.servlet.FilterChain; 027import javax.servlet.FilterConfig; 028import javax.servlet.ServletException; 029import javax.servlet.ServletRequest; 030import javax.servlet.ServletResponse; 031import javax.servlet.http.HttpServletRequest; 032import javax.servlet.http.HttpServletResponse; 033import java.io.IOException; 034import java.util.HashSet; 035import java.util.Set; 036 037/** 038 * Filter that Enforces the content-type to be application/octet-stream for 039 * POST and PUT requests. 040 */ 041@InterfaceAudience.Private 042public class CheckUploadContentTypeFilter implements Filter { 043 044 private static final Set<String> UPLOAD_OPERATIONS = new HashSet<String>(); 045 046 static { 047 UPLOAD_OPERATIONS.add(HttpFSFileSystem.Operation.APPEND.toString()); 048 UPLOAD_OPERATIONS.add(HttpFSFileSystem.Operation.CREATE.toString()); 049 } 050 051 /** 052 * Initializes the filter. 053 * <p/> 054 * This implementation is a NOP. 055 * 056 * @param config filter configuration. 057 * 058 * @throws ServletException thrown if the filter could not be initialized. 059 */ 060 @Override 061 public void init(FilterConfig config) throws ServletException { 062 } 063 064 /** 065 * Enforces the content-type to be application/octet-stream for 066 * POST and PUT requests. 067 * 068 * @param request servlet request. 069 * @param response servlet response. 070 * @param chain filter chain. 071 * 072 * @throws IOException thrown if an IO error occurrs. 073 * @throws ServletException thrown if a servet error occurrs. 074 */ 075 @Override 076 public void doFilter(ServletRequest request, ServletResponse response, 077 FilterChain chain) 078 throws IOException, ServletException { 079 boolean contentTypeOK = true; 080 HttpServletRequest httpReq = (HttpServletRequest) request; 081 HttpServletResponse httpRes = (HttpServletResponse) response; 082 String method = httpReq.getMethod(); 083 if (method.equals("PUT") || method.equals("POST")) { 084 String op = httpReq.getParameter(HttpFSFileSystem.OP_PARAM); 085 if (op != null && UPLOAD_OPERATIONS.contains(op.toUpperCase())) { 086 if ("true".equalsIgnoreCase(httpReq.getParameter(HttpFSParametersProvider.DataParam.NAME))) { 087 String contentType = httpReq.getContentType(); 088 contentTypeOK = 089 HttpFSFileSystem.UPLOAD_CONTENT_TYPE.equalsIgnoreCase(contentType); 090 } 091 } 092 } 093 if (contentTypeOK) { 094 chain.doFilter(httpReq, httpRes); 095 } 096 else { 097 httpRes.sendError(HttpServletResponse.SC_BAD_REQUEST, 098 "Data upload requests must have content-type set to '" + 099 HttpFSFileSystem.UPLOAD_CONTENT_TYPE + "'"); 100 101 } 102 } 103 104 /** 105 * Destroys the filter. 106 * <p/> 107 * This implementation is a NOP. 108 */ 109 @Override 110 public void destroy() { 111 } 112 113}