ns_upload_stats - Return real-time statistic about being uploaded file
This command is useful in case of uploading big files and giving users some progress statistics about the process. It works by creating special counter for the uploaded url and keeps updating it while the file is being uploaded. Once file is uploaded completely these statistics are removed from the local cache.
key The key is either the value provided via the query parameter "X-Progress-ID" (if provided) or the url with the query parameters. The convention with the query parameter "X-Progress-ID" is supported by nginx, lighttpd and by apache (mod_passenger).
ns_section ns/parameters { ns_param progressminsize 2kB }
Put some examples here to illustrate command usage.