301 redirect replacing www if present

What are the different hostnames/URLs you're planning to redirect from http to https on the http virtual server?

If you're only managing a single domain with two URL variants (Ex. , unifirst.ca) the simplest way would be to redirect all http requests to the desired hostname:

when HTTP_REQUEST {
    HTTP::respond 301 Location "https://unifirst.ca[HTTP::uri]"
}