Nginx ignores access_by_lua_file with proxy_pass

Question

I use OpenResty in my project and faced issue that nginx ignores access_by_lua_file when use proxy pass. Here is my code of location:

    location /getapi {
                    internal;
                    set $apiauth '';
                    set $api_host '';
                    access_by_lua_file /usr/local/openresty/nginx/conf/lua/getapi.lua;
                    proxy_redirect default;
                    proxy_pass $api_host;
                    proxy_ssl_certificate "/usr/local/openresty/nginx/conf/cert.pem"
certificate_key "cert.key";
                    proxy_set_header Host $http_host;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header Authorization $apiauth;
                }

I call this location with ngx.location.capture. In lua file i define variables apiauth and api_host. But contents of lua file never executes, nginx just ignores it. And no errors in error.log. The only one is that i try to GET empty URL. How can i force nginx to execute contents of access_by_lua_file?

According to the request execution flow access_by_lua handler should be executed even when you generate response content via the proxy_pass directive, but you'd better change it to rewrite_by_lua or even better rewrite your code to be used via set_by_lua (the last one used somehow different syntax, you must return the value that should be assigned to the variable, check the examples). — Ivan Shatsky
– Ivan Shatsky, Commented Nov 12, 2020 at 12:17

balamutik · Accepted Answer · 2020-11-12 12:33:52Z

2

Thanks to @IvanShatsky. Rewrite_by_lua works fo me.

answered Nov 12, 2020 at 12:33

balamutik

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