From what I've seen of various reverse proxies (nginx, apache, varnish), they seem to buffer file uploads to disk before handing them off to the service they're proxying for. I need a reverse proxy that doesn't do this; I have a system that handles uploads itself, and buffering uploaded files to disk is not something that works for me. Does anybody know of a proxy server that can be configured to just pass traffic through to the proxied services without doing any buffering to disk?