Nginx - Redirect some traffic from HTTP to HTTPS

nginx.conf

set $needs_https_redir 1;

# Do not force HTTPS if the client is directly connecting to this server via
# HTTPS.
if ($scheme = 'https') {
	set $needs_https_redir 0;
}

# Do not force HTTPS if the client is indireclty connecting to this server via
# HTTPS and the gateway tells us that through the X-Forwarded-Proto header.
if ($http_x_forwarded_proto = 'https') {
	set $needs_https_redir 0;
}

# Do not force HTTPS if the client is requesting /foo/bar
if ($request_uri ~ ^/foo/bar$) {
	set $needs_https_redir 0;
}

if ($needs_https_redir = 1) {
	#rewrite ^ https://$host$uri permanent;
	return 301 https://$host$uri;
}