| <%@ page |
| contentType="text/html; charset=UTF-8" |
| import="java.io.*" |
| import="java.security.PrivilegedExceptionAction" |
| import="java.util.*" |
| import="javax.servlet.*" |
| import="javax.servlet.http.*" |
| import="org.apache.hadoop.conf.Configuration" |
| import="org.apache.hadoop.hdfs.*" |
| import="org.apache.hadoop.hdfs.server.namenode.*" |
| import="org.apache.hadoop.hdfs.server.datanode.*" |
| import="org.apache.hadoop.hdfs.protocol.*" |
| import="org.apache.hadoop.hdfs.security.token.delegation.*" |
| import="org.apache.hadoop.io.Text" |
| import="org.apache.hadoop.security.UserGroupInformation" |
| import="org.apache.hadoop.security.token.Token" |
| import="org.apache.hadoop.util.*" |
| import="java.text.DateFormat" |
| import="java.net.InetAddress" |
| import="java.net.URLEncoder" |
| %> |
| <%! |
| static String getDelegationToken(final NameNode nn, |
| final UserGroupInformation ugi, |
| HttpServletRequest request, Configuration conf) |
| throws IOException, InterruptedException { |
| Token<DelegationTokenIdentifier> token = |
| ugi.doAs( |
| new PrivilegedExceptionAction<Token<DelegationTokenIdentifier>>() |
| { |
| public Token<DelegationTokenIdentifier> run() throws IOException { |
| return nn.getDelegationToken(new Text(ugi.getUserName())); |
| } |
| }); |
| return token.encodeToUrlString(); |
| } |
| |
| public void redirectToRandomDataNode( |
| ServletContext context, |
| HttpServletRequest request, |
| HttpServletResponse resp |
| ) throws IOException, InterruptedException { |
| Configuration conf = (Configuration) context.getAttribute(JspHelper.CURRENT_CONF); |
| NameNode nn = (NameNode)context.getAttribute("name.node"); |
| final UserGroupInformation ugi = JspHelper.getUGI(context, request, conf); |
| String tokenString = null; |
| if (UserGroupInformation.isSecurityEnabled()) { |
| tokenString = getDelegationToken(nn, ugi, request, conf); |
| } |
| FSNamesystem fsn = nn.getNamesystem(); |
| String datanode = fsn.randomDataNode(); |
| String redirectLocation; |
| String nodeToRedirect; |
| int redirectPort; |
| if (datanode != null) { |
| redirectPort = Integer.parseInt(datanode.substring(datanode.indexOf(':') |
| + 1)); |
| nodeToRedirect = datanode.substring(0, datanode.indexOf(':')); |
| } |
| else { |
| nodeToRedirect = nn.getHttpAddress().getHostName(); |
| redirectPort = nn.getHttpAddress().getPort(); |
| } |
| String fqdn = InetAddress.getByName(nodeToRedirect).getCanonicalHostName(); |
| redirectLocation = "http://" + fqdn + ":" + redirectPort + |
| "/browseDirectory.jsp?namenodeInfoPort=" + |
| nn.getHttpAddress().getPort() + |
| "&dir=/" + |
| (tokenString == null ? "" : |
| JspHelper.getDelegationTokenUrlParam(tokenString)); |
| resp.sendRedirect(redirectLocation); |
| } |
| %> |
| |
| <html> |
| |
| <title></title> |
| |
| <body> |
| <% |
| redirectToRandomDataNode(application, request, response); |
| %> |
| <hr> |
| |
| <h2>Local logs</h2> |
| <a href="/logs/">Log</a> directory |
| |
| <% |
| out.println(ServletUtil.htmlFooter()); |
| %> |
