NGINX: Authentication Based on Subrequest Result (via) TIL about this neat feature of NGINX: you can use the auth_request directive to cause NGINX to make an HTTP subrequest to a separate authentication server for each incoming HTTP request. The authentication server can see the cookies on the incoming request and tell NGINX if it should fulfill the parent request (via a 2xx status code) or if it should be denied (by returning a 401 or 403). This means you can run NGINX as an authenticating proxy in front of any HTTP application and roll your own custom authentication code as a simple webhook-recieving endpoint.
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