How to use

getDelegationTokenUrlParam

method

in

org.apache.hadoop.hdfs.server.common.JspHelper

@Test
public void testDelegationTokenUrlParam() {
 conf.set(DFSConfigKeys.HADOOP_SECURITY_AUTHENTICATION, "kerberos");
 UserGroupInformation.setConfiguration(conf);
 String tokenString = "xyzabc";
 String delegationTokenParam = JspHelper
   .getDelegationTokenUrlParam(tokenString);
 //Security is enabled
 Assert.assertEquals(JspHelper.SET_DELEGATION + "xyzabc",
   delegationTokenParam);
 conf.set(DFSConfigKeys.HADOOP_SECURITY_AUTHENTICATION, "simple");
 UserGroupInformation.setConfiguration(conf);
 delegationTokenParam = JspHelper
   .getDelegationTokenUrlParam(tokenString);
 //Empty string must be returned because security is disabled.
 Assert.assertEquals("", delegationTokenParam);
}

protected String addDelegationTokenParam(String query) throws IOException {
 String tokenString = null;
 if (UserGroupInformation.isSecurityEnabled()) {
  synchronized (this) {
   tokenAspect.ensureTokenInitialized();
   if (delegationToken != null) {
    tokenString = delegationToken.encodeToUrlString();
    return (query + JspHelper.getDelegationTokenUrlParam(tokenString));
   }
  }
 }
 return query;
}

protected String addDelegationTokenParam(String query) throws IOException {
 String tokenString = null;
 if (UserGroupInformation.isSecurityEnabled()) {
  synchronized (this) {
   tokenAspect.ensureTokenInitialized();
   if (delegationToken != null) {
    tokenString = delegationToken.encodeToUrlString();
    return (query + JspHelper.getDelegationTokenUrlParam(tokenString));
   }
  }
 }
 return query;
}

/** Create a redirection URL */
private URL createRedirectURL(UserGroupInformation ugi, DatanodeID host,
  HttpServletRequest request, NameNode nn) 
  throws IOException {
 final String hostname = host instanceof DatanodeInfo 
   ? host.getHostName() : host.getIpAddr();
 final String scheme = request.getScheme();
 int port = host.getInfoPort();
 if ("https".equals(scheme)) {
  final Integer portObject = (Integer) getServletContext().getAttribute(
    DFSConfigKeys.DFS_DATANODE_HTTPS_PORT_KEY);
  if (portObject != null) {
   port = portObject;
  }
 }
 final String encodedPath = ServletUtil.getRawPath(request, "/fileChecksum");
 String dtParam = "";
 if (UserGroupInformation.isSecurityEnabled()) {
  String tokenString = ugi.getTokens().iterator().next().encodeToUrlString();
  dtParam = JspHelper.getDelegationTokenUrlParam(tokenString);
 }
 String addr = nn.getNameNodeAddressHostPortString();
 String addrParam = JspHelper.getUrlParam(JspHelper.NAMENODE_ADDRESS, addr);
 return new URL(scheme, hostname, port, 
   "/getFileChecksum" + encodedPath + '?' +
   "ugi=" + ServletUtil.encodeQueryValue(ugi.getShortUserName()) + 
   dtParam + addrParam);
}

/** Create a redirection URL */
private URL createRedirectURL(UserGroupInformation ugi, DatanodeID host,
  HttpServletRequest request, NameNode nn) 
  throws IOException {
 final String hostname = host instanceof DatanodeInfo 
   ? host.getHostName() : host.getIpAddr();
 final String scheme = request.getScheme();
 int port = host.getInfoPort();
 if ("https".equals(scheme)) {
  final Integer portObject = (Integer) getServletContext().getAttribute(
    DFSConfigKeys.DFS_DATANODE_HTTPS_PORT_KEY);
  if (portObject != null) {
   port = portObject;
  }
 }
 final String encodedPath = ServletUtil.getRawPath(request, "/fileChecksum");
 String dtParam = "";
 if (UserGroupInformation.isSecurityEnabled()) {
  String tokenString = ugi.getTokens().iterator().next().encodeToUrlString();
  dtParam = JspHelper.getDelegationTokenUrlParam(tokenString);
 }
 String addr = nn.getNameNodeAddressHostPortString();
 String addrParam = JspHelper.getUrlParam(JspHelper.NAMENODE_ADDRESS, addr);
 return new URL(scheme, hostname, port, 
   "/getFileChecksum" + encodedPath + '?' +
   "ugi=" + ServletUtil.encodeQueryValue(ugi.getShortUserName()) + 
   dtParam + addrParam);
}

dtParam = JspHelper.getDelegationTokenUrlParam(dt);

dtParam = JspHelper.getDelegationTokenUrlParam(dt);