Unauthorized Error and Internal Server Error


 Can someone help me out with this?  I try to upload a large file from the client side to the server side and when I tested on the localhost, I always have this error "The remote server returned an error: (401) Unauthorized.".  So I checked the virtual directory and uncheck the "Anonymous access" and checked the "Intergated window authentication", but still have the same problem.

Also when I tested to upload from a client side to the server side, I got this error message The remote server returned an error: (500) Internal Server Error."

 Does anyone knows why and how do I fix this?  Thanks


11/27/2007 5:57:56 PM
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How are you attempting to do this upload?

-Tab Alleman
11/27/2007 8:12:50 PM

Before it uploads any files, it will send the request string to the host to validate the username and password, then I get the HttpWebResponse back, if it is valid, then it will upload to the host, but it returns The remote server returned an error: (401) Unauthorized, I have set the server side web config to unchecked anonymous access, but it still fails.  Any ideas why?

11/27/2007 9:26:16 PM

Can you post your code?

-Tab Alleman
11/27/2007 9:31:01 PM

RequestString is like this  http://localhost/UploadService/uploadservice.asmx/Login?uname=test&pword=123

 and It fails to response at this code:  myHttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)


Private Function UploadFile(ByVal filename As String, ByVal username As String, ByVal password As String, ByVal hostname As String) As Boolean

Dim bUser As Boolean

Dim myWebClient As New WebClient()

Dim myHttpWebRequest As HttpWebRequest

Dim myHttpWebResponse As HttpWebResponse

Dim RequestString As String

Dim resStream As Stream

Dim Return_code As Boolean


RequestString = hostname + "/Login?uname=" + username + "&pword=" + password

Call Write_Upload_Trace_record(RequestString)

myHttpWebRequest = CType(WebRequest.Create(RequestString), HttpWebRequest)

myHttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)

resStream = myHttpWebResponse.GetResponseStream()

Dim count As Long = 0

Dim buf(8192) As Byte

Dim sTemp As String

Dim sb As New StringBuilder()


count = resStream.Read(buf, 0, buf.Length)

If count <> 0 Then

sTemp = Encoding.ASCII.GetString(buf, 0, count)


End If

Loop While count > 0

If sb.ToString().IndexOf("Valid User") <> -1 Then

bUser = True

Call Write_Upload_Trace_record("Valid User.")

Call Write_Upload_Trace_record("Starting Upload: " & hostname & "/UploadFile?" & filename)

Dim responseArray As Byte() = myWebClient.UploadFile(hostname + "/UploadFile?", "POST", filename)

Call Write_Upload_Trace_record("File " + filename + " has been uploaded to server")

Call Sleep(2)


Return_code = True


bUser = False

Call Write_Upload_Trace_record("Upload Failed: " + sb.ToString())

Return_code = False

End If



Return (Return_code)

Catch e As System.Exception

Call Write_Upload_Trace_record("Upload Failed: " + e.Message())

Return False

End Try

End Function

11/27/2007 9:40:42 PM

What happens when you paste your request string into the address bar of a browser?   Do you get a response?

-Tab Alleman
11/27/2007 10:04:44 PM

I got this error response Request format is unrecognized for URL unexpectedly ending in '/Login'.

11/27/2007 10:10:49 PM

Why do you have "/Login" in your Request string?  

-Tab Alleman
11/27/2007 10:28:20 PM

The reason why I use the "Login" in the string because when it hits the server application and go in the "Login" function to check the user name and password, but I can take the "Login" out of the string and it's still fails at The remote server returned an error: (401) Unauthorized

11/27/2007 10:48:28 PM

Are you sure that's the way the request should be formed?  It makes it an invalid URL.   Maybe the request should really look something more like:   http://mydomain.com/MyApp.asmx?function=login&UID=abc&password=123


-Tab Alleman
11/27/2007 11:03:08 PM

Yes that's the way the request string form, when I test the upload from the client side to the Server, It works fine and it uploads any files under 13megs to the server directory and timeout any file over 13 megs, but when I try to tested from client side to the localhost, I get the 401 Unauthorized Error.  I really don't know why it happens?

11/28/2007 2:43:07 AM

i'm afraid I'm out of my depth, then.   I've never called a webservice in this manner before.   Is there some reason you can't add the webservice to your project and simply instantiate it?   What happens if you type this in your browser?




-Tab Alleman
11/28/2007 7:13:11 PM

How do you add the webservice in the project?  Is it from Client site or Server side?

11/29/2007 4:38:33 PM


How do you add the webservice in the project?  Is it from Client site or Server side?



Based on my understanding, you want to consume the web service from your asp.net application. If I have misunderstood you, please feel free to let me know.

If we want to consume the web service, we can browse for Web services and add Web references to your Web site with Add Web Reference dialog box. For more information about adding Web services, see http://msdn2.microsoft.com/en-us/library/8dcbc50t(VS.80).aspx and http://aspalliance.com/979_Working_with_Web_Services_Using_ASPNET.all.

I hope this helps. 


Thomas Sun
Microsoft Online Community Support

Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question.
11/30/2007 3:12:31 AM

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