Getting Potentially dangerous Request.Path (?) intermittently

Programming in asp.net-mvc: Getting Potentially dangerous Request.Path (?) intermittently on newest questions tagged asp.net-mvc – Stack Overflow

I have an mvc app that has a catch all route setup that occasionally throws a dangerous request path exception on ‘?’.

I have the route setup like

routes.MapRoute(
  "ImageResponse", // Route name
  "{*_*}", // Just cute
  new { controller = "ImageResponse", action = "RenderImage" } // Parameter defaults
);

I get exceptions on paths saying that ‘?’ was a dangerous request, but I can’t reproduce it (copy and paste it straight out of event logs). This seems to happen when I put a bit of load on the machine.

For example, I found something like this in my event logs (everything left of the .jpg has been change to protect the innocent, although there are three dirs and a file name).

/an/example/path/image.jpg?Size=Thumb

Has anyone run into this issue before? It seems like something isn’t detecting my filename there.

source: http://stackoverflow.com/questions/11922478/getting-potentially-dangerous-request-path-intermittently
Programming in asp.net-mvc: programming-in-asp-net-mvc