# The Evolution of Finger: using a single factory for multiple protocols

## Introduction

This is the eighth part of the Twisted tutorial Twisted from Scratch, or The Evolution of Finger.

In this part, we add HTTPS support to our web frontend, showing how to have a single factory listen on multiple ports.

## Support HTTPS

All we need to do to code an HTTPS site is just write a context factory (in this case, which loads the certificate from a certain file) and then use the twisted.application.internet.SSLServer method. Note that one factory (in this case, a site) can listen on multiple ports with multiple protocols.

finger22.py