NGINX with NJS for token validation

Question

I am trying to use NGINX auth_request and NJS to validate the OAuth token. I also want to validate the token based on the parent request's $request_method, but I am not able to get the original request's method. Instead I am receiving the internal auth request's method and URI.

Requested method is GET /_oauth2_token_introspection

Is there any way to get the original request's $request_method and $request_uri. I referred to https://github.com/nginx/njs-examples/blob/master/README.rst#authorizing-requests-using-auth_request-httpauthorizationauth_request but the "r.method" is always GET even if the original parent request is PUT/POST.

I also tried to send it using headers and read it in NJS code, but it is always "undefined"

location = /_oauth2_token_introspection {
        internal;
        
        proxy_set_header Content-Length "";
        proxy_pass_request_headers on;
        proxy_set_header        X-Original-URI $request_uri;
        proxy_set_header        X-Original-METHOD $request_method;
        js_content oauth2.introspectAccessToken;
    }

Can someone help me in this regard

Answer 1

Using r.variables.request_uri and r.variables.request_method in my NJS script worked for me. For more details, refer https://github.com/nginx/njs/issues/100