How to write logs of visits to the site?

Question

Nginx

There is an html page that is embedded on other sites through an iframe. It is necessary to collect information about which sites this page was requested from. How can this be done without a server-side API?

Answer 1

If you need simple statistics, then the usual access log is also suitable:

server {
  listen 80;
  server_name example.com;

  # Logs
  access_log /var/log/nginx/access.log;
}

After that, the log file can be parsed very easily. For example, to display the statistics of response codes, you can run in the terminal:
or do the same but using awk:
You can also see the most requested page:

awk -F\" '{print $2}' access.log | awk '{print $2}' | sort | uniq -c | sort -r