asp.net - Problem with a URL that ends with %20

Question

I have a big problem. There are devices in live that send the URL "/updates ". It's a typo of the developer for those devices. In the server logs, it looks like "/updates+".

I have a ManageURL rewriting module that handles all requests without extension. But this request causes an HttpException:

System.Web.HttpException:

System.Web.HttpException
   at System.Web.Util.FileUtil.CheckSuspiciousPhysicalPath(String physicalPath)
   at System.Web.HttpContext.ValidatePath()
   at System.Web.HttpApplication.ValidatePathExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

As I see in the logs, the URL rewriting module does not even get this URL, so I cannot fix it there.

Is there a way to handle those URLs with ASP.NET?

Answer 1

Ok, this is an old thread, but I like to add a workable solution that works for all ASP.NET versions. Have a look at this answer in a related thread. It basically comes down to registering to the event PreSendRequestHeaders in global.asax.cs.

Alternatively, when on ASP.NET 4.0 or higher, use <httpRuntime relaxedUrlToFileSystemMapping="true" /> in web.config.