Poor man's HTTPS redirect.

nginx-if.conf

location /statement {
        proxy_set_header Host				$host;
        proxy_set_header X-Forwarded-Host	$host;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Forwarded-For	$proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto  $scheme;
        proxy_http_version 1.1;
        proxy_set_header Connection "";

        # Redirect to https if the protocol is http and the cookie is set
        set $send_to_https 1;
        if ($cookie_bcp_active__my_account != "Y") {
            set $send_to_https 0;
        }
        if ($scheme = "https") {
            set $send_to_https 0;
        }
        if ($send_to_https) {
            rewrite ^ https://$http_host$request_uri? redirect;
        }

        proxy_pass http://$upstream_live_bcp_active__my_account;
    }