/**
* 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.hdfsproxy;
import java.io.IOException;
import java.net.URL;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.protocol.HdfsFileStatus;
import org.apache.hadoop.hdfs.server.namenode.FileDataServlet;
import org.apache.hadoop.hdfs.server.namenode.JspHelper;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.util.ServletUtil;
/** {@inheritDoc} */
public class ProxyFileDataServlet extends FileDataServlet {
/** For java.io.Serializable */
private static final long serialVersionUID = 1L;
/** {@inheritDoc} */
@Override
protected URL createRedirectURL(String path, String encodedPath, HdfsFileStatus status,
UserGroupInformation ugi, ClientProtocol nnproxy, HttpServletRequest request, String dt)
throws IOException {
String dtParam="";
if (dt != null) {
dtParam = JspHelper.getDelegationTokenUrlParam(dt);
}
return new URL(request.getScheme(), request.getServerName(), request.getServerPort(),
"/streamFile" + encodedPath + '?' +
"ugi=" + ServletUtil.encodeQueryValue(ugi.getShortUserName()) + dtParam);
}
/** {@inheritDoc} */
@Override
protected UserGroupInformation getUGI(HttpServletRequest request,
Configuration conf) {
String userID = (String) request
.getAttribute("org.apache.hadoop.hdfsproxy.authorized.userID");
return ProxyUtil.getProxyUGIFor(userID);
}
}