/** Create a redirection URL */
private URL createRedirectURL(
String path,
String encodedPath,
HdfsFileStatus status,
UserGroupInformation ugi,
ClientProtocol nnproxy,
HttpServletRequest request,
String dt)
throws IOException {
String scheme = request.getScheme();
final LocatedBlocks blks =
nnproxy.getBlockLocations(status.getFullPath(new Path(path)).toUri().getPath(), 0, 1);
final Configuration conf = NameNodeHttpServer.getConfFromContext(getServletContext());
final DatanodeID host = pickSrcDatanode(blks, status, conf);
final String hostname;
if (host instanceof DatanodeInfo) {
hostname = host.getHostName();
} else {
hostname = host.getIpAddr();
}
int port = "https".equals(scheme) ? host.getInfoSecurePort() : host.getInfoPort();
String dtParam = "";
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.NAMENODE_ADDRESS, addr);
return new URL(
scheme,
hostname,
port,
"/streamFile"
+ encodedPath
+ '?'
+ "ugi="
+ ServletUtil.encodeQueryValue(ugi.getShortUserName())
+ dtParam
+ addrParam);
}