How to redirect on the same port from http to https with nginx reverse proxy

Question

I use reverse proxy with Nginx and I want to force the request into HTTPS, so if a user wants to access the url with http, he will be automatically redirected to HTTPS.

Answer 1

This is my approach, which I think is quite clean and allows you to add further locations if needed. I add a test on the $http_x_forwarded_proto property which if true forces all HTTP traffic to HTTPS on a NGINX Reverse Proxy setup

upstream flask_bootstrap {
    server flask-bootstrap:8000;
}

server {
    # SSL traffic terminates on the Load Balancer so we only need to listen on port 80
    listen 80;

    # Set reverse proxy
    location / {
        proxy_pass http://flask_bootstrap;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $host;
        proxy_redirect http://localhost/;

        # Permanently redirect any http calls to https
        if ($http_x_forwarded_proto != 'https') {
            return 301 https://$host$request_uri;
        }
    }
}