Original question (Please view edit):

In nginx, there is module directive called proxy_read_timeout: http://nginx.org/en/docs/http/ngx_http_proxy_module.html - By default, it is 60s, and as I understand it, this is only for calls between nginx and the proxied service like so:

Client (Uploads a big file) -> nginx Gateway -> (Waits 60 seconds) -> Downstream Service

In Spring Cloud Gateway, I'm familiar you can set this:

spring:
  cloud:
    gateway:
      httpclient:
        response-timeout: 60s

or per route using metadata like this:

.metadata(RESPONSE_TIMEOUT_ATTR, 60)

However, this seems to set the response timeout for the entire call chain, like so:

Client (Uploads a big file) -> (Waits 60 seconds) Spring Cloud Gateway -> Downstream Service

Is there a way to set a response timeout only between SCG and the proxied service but not the whole request? Or perhaps dynamically or programatically set the response timeout on between downstream calls?

I would like to limit the response time of the proxied call, but if a client is uploading a big file, it might take longer depending on their upload speed.

---

Edit: After some more research, proxy_read_timeout is behaving the same as SCG's response-timeout - The issue has been narrowed down to this config (we use openresty/lua-nginx-module)

lua_need_request_body on;
proxy_read_timeout 10s;

With the above, I observed a 30s transfer start, and then it reached the backend service

With this commented out:

# lua_need_request_body on;
proxy_read_timeout 10s;

I observed a upstream timed out in nginx, and transfer start getting cut short (file didn't finish uploading)

Their doc https://github.com/openresty/lua-nginx-module#lua_need_request_body indicates:

Determines whether to force the request body data to be read before running rewrite/access/content_by_lua* or not.

So they must be doing payload body processing before anything else takes over.

So the new question is, can Spring Cloud Gateway process uploading the file before any response-timeout settings kick in?