Axios request to nginx as proxy server fails

[IronCub3]

Hi everyone I was wondering if someone could help with my react code in order to make my axios requests work. What I'm experiencing is that by doing this simple request:

(my_laptop_ip, public_ip, internal_ip and internal_port are name like this for privacy)

The axios call is this:

try {
            const resp = await axios.get(
              `http://${public_ip}/api/auth/types`
            );
          } catch (err) {
            console.log(err);
}

The nginx configuration file is this:

server {

        listen 80;
        listen [::]:80;
	server_name public_ip;
        access_log  /var/log/nginx/host.access.log main;

        # frontend
        location / {
                root /usr/share/nginx/html/build;
                include /etc/nginx/mime.types;
                try_files $uri $uri/ /index.html;
                index  index.html index.htm;
        }

        # backend
        location /api/ {
                proxy_pass http://internal_ip:internal_port/;
                proxy_buffering         on;
                proxy_http_version 1.1;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
                proxy_set_header Host $host;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /usr/share/nginx/html;
        }
}

In the backend cors is well setted and also the header Access-Control-Allow-Credentials is setted. Also the path /api/auth/types doesn't require any login or token and if I do a curl request or I use postman the backend responds correctly.

Curl response:

❯ curl -vvvv -H "Origin: my_laptop_ip" http://public_ip/api/auth/types
*   Trying public_ip:80...
* Connected to public_ip (public_ip) port 80 (#0)
> GET /api/auth/types HTTP/1.1
> Host: public_ip
> User-Agent: curl/7.88.1
> Accept: */*
> Origin: my_laptop_ip
>
< HTTP/1.1 200 OK
< Server: nginx/1.25.1
< Date: Tue, 11 Jul 2023 09:27:16 GMT
< Content-Type: application/json; charset=utf-8
< Content-Length: 30
< Connection: keep-alive
< X-Powered-By: Express
< Access-Control-Allow-Credentials: true
< Access-Control-Allow-Origin: my_laptop_ip
< Vary: Origin
< ETag: W/"1e-D6ccC1T1C08e2aWxt7+sjhZBEkg"
<
[
  "value2",
  "value1"
* Connection #0 to host public_ip left intact
]%

[IronCub3]

Solved, it was a problem with the Origin header not sended by the nginx by default.