Hi,

Tried to search on this for a couple of hours, but had no luck, hoping you
guys can help.

I have a use case, that I need to proxy the request to server-A first, then
if returns 200, then it'll query server-B and return that result. If it
returned != 200, just return 404. Something like this:

function pseudoCode() {
if (server-a.process() == 200) {
return server-b.process()
}

// Got a non-200 from server-a, just return 404
return 404
}

Is there a straightforward way of doing this in nginx?

Thanks!
Jason
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