| /** |
| * 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.crypto.key.kms.server; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.security.token.delegation.web.HttpUserGroupInformation; |
| |
| import javax.servlet.Filter; |
| import javax.servlet.FilterChain; |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| import javax.servlet.http.HttpServletRequest; |
| import java.io.IOException; |
| |
| /** |
| * Servlet filter that captures context of the HTTP request to be use in the |
| * scope of KMS calls on the server side. |
| */ |
| @InterfaceAudience.Private |
| public class KMSMDCFilter implements Filter { |
| |
| private static class Data { |
| private UserGroupInformation ugi; |
| private String method; |
| private StringBuffer url; |
| |
| private Data(UserGroupInformation ugi, String method, StringBuffer url) { |
| this.ugi = ugi; |
| this.method = method; |
| this.url = url; |
| } |
| } |
| |
| private static final ThreadLocal<Data> DATA_TL = new ThreadLocal<Data>(); |
| |
| public static UserGroupInformation getUgi() { |
| return DATA_TL.get().ugi; |
| } |
| |
| public static String getMethod() { |
| return DATA_TL.get().method; |
| } |
| |
| public static String getURL() { |
| return DATA_TL.get().url.toString(); |
| } |
| |
| @Override |
| public void init(FilterConfig config) throws ServletException { |
| } |
| |
| @Override |
| public void doFilter(ServletRequest request, ServletResponse response, |
| FilterChain chain) |
| throws IOException, ServletException { |
| try { |
| DATA_TL.remove(); |
| UserGroupInformation ugi = HttpUserGroupInformation.get(); |
| String method = ((HttpServletRequest) request).getMethod(); |
| StringBuffer requestURL = ((HttpServletRequest) request).getRequestURL(); |
| String queryString = ((HttpServletRequest) request).getQueryString(); |
| if (queryString != null) { |
| requestURL.append("?").append(queryString); |
| } |
| DATA_TL.set(new Data(ugi, method, requestURL)); |
| chain.doFilter(request, response); |
| } finally { |
| DATA_TL.remove(); |
| } |
| } |
| |
| @Override |
| public void destroy() { |
| } |
| } |