hadoop WhoServlet 源码
haddop WhoServlet 代码
文件路径：/hadoop-common-project/hadoop-auth-examples/src/main/java/org/apache/hadoop/security/authentication/examples/WhoServlet.java
/**
* Licensed 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. See accompanying LICENSE file.
*/
package org.apache.hadoop.security.authentication.examples;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.Writer;
import java.text.MessageFormat;
/**
* Example servlet that returns the user and principal of the request.
*/
public class WhoServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setContentType("text/plain");
resp.setStatus(HttpServletResponse.SC_OK);
String user = req.getRemoteUser();
String principal = (req.getUserPrincipal() != null) ? req.getUserPrincipal().getName() : null;
Writer writer = resp.getWriter();
writer.write(MessageFormat.format("You are: user[{0}] principal[{1}]\n", user, principal));
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req, resp);
}
}
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