Printing in a browser-fronted environment

[Kenneth Brody]

On 3/31/2017 12:13 PM, Bob Rasmussen via Filepro-list wrote:
[...]
> 4) Print Wizard is registered on the PC as the designated handler for
> "pw://", with an associated command line that launches printwiz.exe with
> appropriate options.
>
> 5) On click, web server links to a URL of the format
> "pw://https://somehost.com/somefile". Following the registry entry, browser
> fires off printwiz.exe, passing arguments. Printwiz fetches the printfile
> using the provided URL from the server, prints the file.
[...]

Is it possible to have a new "Content-Type", such as 
"application/X-PrintWizard", which could be returned as the result of a 
"normal" HTTP link?

-- 
Kenneth Brody