/// <summary>Create a redirection URL</summary>
/// <exception cref="System.IO.IOException"/>
private Uri CreateRedirectURL(string path, string encodedPath, HdfsFileStatus status
, UserGroupInformation ugi, ClientProtocol nnproxy, HttpServletRequest request,
string dt)
{
string scheme = request.GetScheme();
LocatedBlocks blks = nnproxy.GetBlockLocations(status.GetFullPath(new Path(path))
.ToUri().GetPath(), 0, 1);
Configuration conf = NameNodeHttpServer.GetConfFromContext(GetServletContext());
DatanodeID host = PickSrcDatanode(blks, status, conf);
string hostname;
if (host is DatanodeInfo)
{
hostname = host.GetHostName();
}
else
{
hostname = host.GetIpAddr();
}
int port = "https".Equals(scheme) ? host.GetInfoSecurePort() : host.GetInfoPort();
string dtParam = string.Empty;
if (dt != null)
{
dtParam = JspHelper.GetDelegationTokenUrlParam(dt);
}
// Add namenode address to the url params
NameNode nn = NameNodeHttpServer.GetNameNodeFromContext(GetServletContext());
string addr = nn.GetNameNodeAddressHostPortString();
string addrParam = JspHelper.GetUrlParam(JspHelper.NamenodeAddress, addr);
return(new Uri(scheme, hostname, port, "/streamFile" + encodedPath + '?' + "ugi="
+ ServletUtil.EncodeQueryValue(ugi.GetShortUserName()) + dtParam + addrParam));
}
