Dealing with nginx 400 “The plain HTTP request was sent to HTTPS port” error

Question

I\'m running a Sinatra app behind passenger/nginx. I\'m trying to get it to respond to both http and https calls. The problem is, when both are defined in the server block h

Answer 1

The above answers are incorrect in that most over-ride the 'is this connection HTTPS' test to allow serving the pages over http irrespective of connection security.

The secure answer using an error-page on an NGINX specific http 4xx error code to redirect the client to retry the same request to https. (as outlined here https://serverfault.com/questions/338700/redirect-http-mydomain-com12345-to-https-mydomain-com12345-in-nginx )

The OP should use:

server {
  listen        12345;
  server_name   php.myadmin.com;

  root         /var/www/php;

  ssl           on;

  # If they come here using HTTP, bounce them to the correct scheme
  error_page 497 https://$host:$server_port$request_uri;

  [....]
}