This can be used to ensure that the client using your application connected to OpenShift's SSL port prior to getting routed to your application.

OpenShift SSL Assurance + Flask

@app.route('/endpoint')
def endpoint():
    # Check for SSL on OpenShift, that is used to force SSL for your endpoint.
    ## You have to check for the X-Forwarded-Proto because of the OpenShift Node Router terminating the SSL. 
    if request.headers.get('X-Forwarded-Proto', 'http') != 'https':
        return redirect(request.url.replace("http://", "https://"))