Facebook not able to scrape my secured url (Nginx)

Question

I have a Node.js app running on a Ubuntu server, with an SSL configured Nginx setup using Let's Encrypt.

My Nginx config file looks like this:

server {

server_name www.example.be example.be;
location / {
        proxy_pass http://localhost:3485;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }

listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/example.be/fullchain.pem; # managed by C$
ssl_certificate_key /etc/letsencrypt/live/example.be/privkey.pem; # managed by$
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

server {
   if ($host = www.example.be) {
      return 301 https://$host$request_uri;
   } # managed by Certbot


   if ($host = example.be) {
      return 301 https://$host$request_uri;
   } # managed by Certbot


   listen 80;
   server_name www.example.be example.be;
   return 404; # managed by Certbot
}

Without SSL, Facebook is perfectly able to scrape my url, but when I activate SSL and then submit it in the Facebook Sharing Debugger, I get following errors:

Could Not Follow Redirect : URL requested a HTTP redirect, but it could not be followed.

Circular Redirect : We could not resolve the canonical URL because the redirect path contained a cycle.

Redirect Path

Input URL -> https://www.example.be

301 HTTP Redirect -> https://www.example.be

Also, I have exactly the same problem with Google's PageSpeed insights. The error I'm getting there is "Attempting to load page reached the limit of 10 redirects"

Thanks for any suggestions!

Answer 1

将https强制重定向到此

if ($http_x_forwarded_proto = "http") { return 301 https://$host$request_uri; }