/// <exception cref="System.IO.IOException"/>
private static UserGroupInformation GetTokenUGI(ServletContext context, HttpServletRequest
request, string tokenString, Configuration conf)
{
Org.Apache.Hadoop.Security.Token.Token <DelegationTokenIdentifier> token = new Org.Apache.Hadoop.Security.Token.Token
<DelegationTokenIdentifier>();
token.DecodeFromUrlString(tokenString);
IPEndPoint serviceAddress = GetNNServiceAddress(context, request);
if (serviceAddress != null)
{
SecurityUtil.SetTokenService(token, serviceAddress);
token.SetKind(DelegationTokenIdentifier.HdfsDelegationKind);
}
ByteArrayInputStream buf = new ByteArrayInputStream(token.GetIdentifier());
DataInputStream @in = new DataInputStream(buf);
DelegationTokenIdentifier id = new DelegationTokenIdentifier();
id.ReadFields(@in);
if (context != null)
{
NameNode nn = NameNodeHttpServer.GetNameNodeFromContext(context);
if (nn != null)
{
// Verify the token.
nn.GetNamesystem().VerifyToken(id, token.GetPassword());
}
}
UserGroupInformation ugi = id.GetUser();
ugi.AddToken(token);
return(ugi);
}
private static IPEndPoint GetNNServiceAddress(ServletContext context, HttpServletRequest
request)
{
string namenodeAddressInUrl = request.GetParameter(NamenodeAddress);
IPEndPoint namenodeAddress = null;
if (namenodeAddressInUrl != null)
{
namenodeAddress = NetUtils.CreateSocketAddr(namenodeAddressInUrl);
}
else
{
if (context != null)
{
namenodeAddress = NameNodeHttpServer.GetNameNodeAddressFromContext(context);
}
}
if (namenodeAddress != null)
{
return(namenodeAddress);
}
return(null);
}
