hadoop KerberosUgiAuthenticator 源码
haddop KerberosUgiAuthenticator 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/KerberosUgiAuthenticator.java
/**
* 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.hdfs.web;
import java.io.IOException;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.authentication.client.Authenticator;
import org.apache.hadoop.security.authentication.client.KerberosAuthenticator;
import org.apache.hadoop.security.authentication.client.PseudoAuthenticator;
/**
* Use UserGroupInformation as a fallback authenticator
* if the server does not use Kerberos SPNEGO HTTP authentication.
*/
public class KerberosUgiAuthenticator extends KerberosAuthenticator {
@Override
protected Authenticator getFallBackAuthenticator() {
return new PseudoAuthenticator() {
@Override
protected String getUserName() {
try {
return UserGroupInformation.getLoginUser().getUserName();
} catch (IOException e) {
throw new SecurityException("Failed to obtain current username", e);
}
}
};
}
}
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