For some web sites you might want to not just offer HTTPS access to your users -- you might want to force all connections to go through HTTPS. There are different ways to do that for different web frameworks. Here are some -- if you don't see the framework you use, let us know with the "Send Feedback" link above.
Django (1.8 or higher)
SECURE_SSL_REDIRECT = True
and make sure you have the SecurityMiddleware enabled - https://docs.djangoproject.com/en/1.11/ref/middleware/#module-django.middleware.security
Django (older versions)
pip install --user django-sslify
Or install it into your virtualenv if you're using one.
Then add the middleware as the first middleware class you have in settings.py.
Also note that it won't force SSL if you have
DEBUG = True in your settings
(which in turn means you'll need to make sure that
ALLOWED_HOSTS is set up
Uncomment this line in db.py:
Use this Flask extension.
FAQ: can I force HTTPS on the naked domain?
You can't force-https if you're using a domain redirection service, but you can if you've manually set up a naked domain config. More info here: Naked Domains
Alternative solution: CloudFlare
Edge caching providers like CloudFlare have their own solutions for HTTPS redirecting, which are worth looking into: