Redirect users to the canonical hostname for your site.
var canon = require('canonical-host')('my-site.com', 'other-site.com')
http.createServer(function (req, res) {
// returns 'true' if it's taking over
if (!canon(req, res)) return
// now we know that they're visiting either my-site.com
// or other-site.com
res.end('Hello from the proper host name!')
})
Pass in the request, the response, 1 or more hostnames to accept, and optionally a statusCode to send with the redirect.
If the host arg has https:// in front of it, then it will be
redirected to https if it's not https already. Likewise if it starts
with http:// and is already https.
Returns a function that takes a req/res pair, and which returns true if it redirected, false otherwise.