IIS 7, HttpHandler and HTTP Error 500.21

Question

On IIS 7, I\'m trying to use custom HttpHandler for my ASP.NET web application. I use pipeline mode \"classic\", .NET version is 4.0.30319, my web.config configuration for t

Answer 1

I had the same problem and just solved it. I had posted my own question on stackoverflow:

Can't PUT to my IHttpHandler, GET works fine

The solution was to set runManagedModulesForWebDavRequests to true in the modules element. My guess is that once you install WebDAV then all PUT requests are associated with it. If you need the PUT to go to your handler, you need to remove the WebDAV module and set this attribute to true.

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So if you're running into the problem when you use the PUT verb and you have installed WebDAV then hopefully this solution will fix your problem.