ASP.NET Development Server unexpected Authenticati

问题:

I have a localhost port based web page (a web service using the ASP.NET Development Server - MSVS2k8 WebDev.WebServer.exe) that works correctly when accessed via a browser (either Chrome 35 or IE 11), but it is currently failing when I access it via WebClient (via DotLisp or LinqPad) or MSTest.

This is on a Win8.1 64-bit machine, still using Visual Studio 2008.

I have rebooted but the problem remains, even though this was working earlier today. I have also ran Visual Studio as Administrator and not.

Details:

Exception: System.Net.WebException Message: The remote server returned an error: (401) Unauthorized. Target: Byte[] DownloadDataInternal(System.Uri, System.Net.WebRequest ByRef) Source: System

Simplified calling code:

 (def (get-web-page url)
  (with-dispose
   (wc (WebClient.)
    b (wc.DownloadData url)
    m (MemoryStream. b false)
    s (StreamReader. m))
   s.Peek
   s.ReadToEnd))

LinqPad:

Using wc = New WebClient
  Dim twp = wc.DownloadString("http://localhost:20147/")'TestServers.aspx")
  twp.Dump
End Using

(I also have a problem when using Run Test instead of Debug Test, where the attempt to update assemblies for Code Coverage or something related to that is failing in "interesting" ways. But I believe this is unrelated to the above problem, except that attempting to solve this issue may have somehow caused me to change the settings that caused the above issue.)

回答1:

I don't know how the settings changed, and/or why it was working earlier otherwise, but turning off NTLM Authentication fixes the problem.

Specifically, right clicking the web project in the Solution Explorer > Property Pages > Start Options and uncheck NTLM Authentication and click OK.