What is the default URL page extension in ASP.NET MVC?

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I'm evaluating a 3rd party website for a client. All the pages end in a .ASP extension (which I'm familiar with from the old days of Classic ASP). The response headers include a "X-Powered-By" value of ASP.Net, and the page content doesn't include the ASP.Net Webforms-specific hidden fields like __EVENTTARGET and __VIEWSTATE.

I'm assuming these are ASP.Net MVC pages, but is there a "fingerprint" that would confirm this?

What I have tried:

Reviewed raw http headers for requests to the site

Posted 7-Nov-23 5:33am

DerekT-P

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Richard Deeming · Answer 1 · 2023-11-07T05:51:00

Solution 1

IIRC, the X-Powered-By header is added if ASP.NET is installed on the server; it doesn't tell you that the current page was actually generated by ASP.NET.

I don't think there's any realy way you can tell from the outside whether this is a "classic" ASP site, an ASP.NET WebForms site coded without server-side forms, an ASP.NET MVC site, or something else entirely. You'd need to look on the server itself to find out.

Posted 7-Nov-23 5:51am

Richard Deeming

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DerekT-P 7-Nov-23 12:18pm

Thanks Richard; I suspected that might be the case! I'm aware just having ASP.Net installed includes that header. I was thrown by the ".asp" extension (indeed surprised to see it at all these days!). The site we're looking at "looks" modern and uses AJAX (which isn't incompatible with classic ASP of course) but just a bit concerned that under the hood it might be really ancient code...