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 */ 018 019 package org.apache.hadoop.fs.http.client; 020 021 import org.apache.hadoop.classification.InterfaceAudience; 022 import org.apache.hadoop.security.UserGroupInformation; 023 import org.apache.hadoop.security.authentication.client.PseudoAuthenticator; 024 025 import java.io.IOException; 026 027 /** 028 * A <code>PseudoAuthenticator</code> subclass that uses FileSystemAccess's 029 * <code>UserGroupInformation</code> to obtain the client user name (the UGI's login user). 030 */ 031 @InterfaceAudience.Private 032 public class HttpFSPseudoAuthenticator extends PseudoAuthenticator { 033 034 /** 035 * Return the client user name. 036 * 037 * @return the client user name. 038 */ 039 @Override 040 protected String getUserName() { 041 try { 042 return UserGroupInformation.getLoginUser().getUserName(); 043 } catch (IOException ex) { 044 throw new SecurityException("Could not obtain current user, " + ex.getMessage(), ex); 045 } 046 } 047 }