hadoop AuthFilter 源码
haddop AuthFilter 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/AuthFilter.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 javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import org.apache.hadoop.hdfs.web.resources.DelegationParam;
import org.apache.hadoop.security.authentication.server.AuthenticationFilter;
import org.apache.hadoop.security.authentication.server.ProxyUserAuthenticationFilter;
/**
* Subclass of {@link AuthenticationFilter} that
* obtains Hadoop-Auth configuration for webhdfs.
*/
public class AuthFilter extends ProxyUserAuthenticationFilter {
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain filterChain) throws IOException, ServletException {
final HttpServletRequest httpRequest = ProxyUserAuthenticationFilter.
toLowerCase((HttpServletRequest)request);
final String tokenString = httpRequest.getParameter(DelegationParam.NAME);
if (tokenString != null && httpRequest.getServletPath().startsWith(
WebHdfsFileSystem.PATH_PREFIX)) {
//Token is present in the url, therefore token will be used for
//authentication, bypass kerberos authentication.
filterChain.doFilter(httpRequest, response);
return;
}
super.doFilter(request, response, filterChain);
}
}
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