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PO401 Unauthorized returned on EndGetResponse. Apache Error log: cannot generate context
 

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    <p>I got a server with Apache running. Now I want to be able to read the contents of a folder there and for that this folder is configured in the Apache httpd.conf something like this:</p> <pre><code>Alias /folder "E:/Folder" &lt;Directory "E:/Folder"&gt; AuthName "Public Folder" AuthType SSPI SSPIAuth On SSPIAuthoritative On SSPIDomain DOMAIN SSPIOfferBasic On SSPIOfferSSPI On SSPIBasicPreferred Off SSPIOmitDomain On SSPIUsernameCase lower require group "DOMAIN\Domain Users" &lt;/Directory&gt; </code></pre> <p>Now when I use a Browser I can already access this Information with the URL <a href="http://ServerName/Folder/" rel="nofollow">http://ServerName/Folder/</a></p> <p>So this workes just fine already. But now I am trying to receive this Folder-Data for my C# application. I am using DefaultNetworkCredentials and my Code looks something like this:</p> <pre><code>public void CheckFolder() { WebRequest request = HttpWebRequest.Create(_uri); request.Credentials = CredentialCache.DefaultNetworkCredentials; request.BeginGetResponse(new AsyncCallback(HandleGetAvailableUpdates), request); } void HandleGetAvailableUpdates(IAsyncResult state) { try { if (state.IsCompleted) { WebRequest req = state.AsyncState as WebRequest; WebResponse response = req.EndGetResponse(state); Stream wStream = null; wStream = response.GetResponseStream(); byte[] data = new byte[response.ContentLength]; etc. . . . } catch (WebException ex) { Console.WriteLine(ex.ToString()); } } } </code></pre> <p>req.EndGetResponse(state) now throws the WebException:</p> <pre><code>The remote server returned an error: (401) Unauthorized. </code></pre> <p>Going back on Server-Side I have a look at the Apache error.log and there I find:</p> <pre><code>(OS 87)The parameter is incorrect. : authentication failure for "/folder": user unknown, reason: cannot generate context </code></pre> <p>This feature of the Program already worked well about two month ago. The C#-Code did not change at all but I dont know if something had been done with the server or the Apache configuration. I also tried to give my Credentials (username and pw, the same I use when accessing via Web-Browser) manually in the C#-Code rather than using the DefaultNetworkCredentials but with no avail. So finally my question would be: Is there something I forgot? Are there any other settings on the server to be made to make it work?</p>
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