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I configured nginx as reverse proxy to my node.js application for file uploads with proxy_pass directive. It works, but my problem is that nginx waits for the whole file body to be uploaded before passing it to the upstream. This causes problems for me, because I want to track upload progress at my application. Any idea how to configure nginx in order to stream file body in real time to the upstream?
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The proxy_pass setting makes the Nginx reverse proxy setup work. The proxy_pass is configured in the location section of any virtual host configuration file. To set up an Nginx proxy_pass globally, edit the default file in Nginx's sites-available folder.
The PROXY protocol enables NGINX and NGINX Plus to receive client connection information passed through proxy servers and load balancers such as HAproxy and Amazon Elastic Load Balancer (ELB). With the PROXY protocol, NGINX can learn the originating IP address from HTTP, SSL, HTTP/2, SPDY, WebSocket, and TCP.
But by default nginx doesn't support FTP as proxy protocol.
There is no way to (at least as of now). Full request will be always buffered before nginx will start sending it to an upstream. To track uploaded files you may try upload progress module.
Update: in nginx 1.7.11 the proxy_request_buffering directive is available, which allows to disable buffering of a request body. It should be used with care though, see docs.
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Tengine (a fork from nginx) support unbuffered upload by setting proxy_request_buffering to off.
http://tengine.taobao.org/document/http_core.html
Updated: in nginx 1.7.11 the proxy_request_buffering directive is available, as @Maxim Dounin mentioned above
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