Detecting SNI (Server Name Indication) browser support in javascript

Question

I want to be able to detect if the browser support SNI - Server Name Indication. I\'m hoping to redirect non compliant clients to a different address.

I was thinkin

Answer 1

You could set up a server that supports SNI, serving two host names, on where you require SNI and one that's a fallback solution, both serving the name that they are hosting.

Something along the lines of:

• https://www.example.com/name returns a representation saying I'm www.example.com
• https://www.example.net/name returns I'm www.example.net (and requires SNI).

If you make an XHR request to https://www.example.net/name and it returns www.example.com, then the browser doesn't support SNI.