Solved

HTTPWebResponse Error: Unable to read data from the transport connection

Posted on 2009-05-19
2
2,642 Views
Last Modified: 2013-12-17
I have some code for uploading a file to a HTTPS server.  The code works great for files up to about 150 MB (not sure of the exact cutoff).   But when the files get bigger than that, then I get the following exception:

    "Unable to write data to the transport connection:  An existing connection was forcibly
    closed by the remote host"

    The BaseException is:  "Unable to read data from the transport connection"


Other users (outside our network) can already successfully upload files up to almost 1 GB with no problems...  it just my code that's not working...

I've searched the internet for hours and haven't found the answer.  Please help. Thanks!

VBRocks

'This the core code from a dll class that works with a windows form.
 

        'Get the length of the selected file

        Dim fi As IO.FileInfo = My.Computer.FileSystem.GetFileInfo(filePath)

        Dim fileLength As Long = fi.Length
 

        'Create the request

        Dim request As HttpWebRequest = _

            DirectCast(HttpWebRequest.Create(address), HttpWebRequest)
 

        'Configure request

        request.Credentials = New System.Net.NetworkCredential("UserName", "Password")
 

        request.Method = WebRequestMethods.Http.Put

        request.KeepAlive = True

        request.Timeout = -1

        request.ContentLength = fileLength.ToString()
 

         'This is required for our WebDav server 

         request.SendChunked = True

         request.Headers.Add("Translate: f")

         request.AllowWriteStreamBuffering = True
 

         Dim s As IO.Stream = request.GetRequestStream()
 

        Dim fs As New IO.FileStream(filePath, IO.FileMode.Open, IO.FileAccess.Read)

        Dim byteTransferRate As Integer = 1024     

        Dim bytes(byteTransferRate - 1) As Byte        

        Dim bytesRead As Integer = 0

        Dim totalBytesRead As Long = 0
 

        Do

            bytesRead = fs.Read(bytes, 0, bytes.Length)
 

            If bytesRead > 0 Then
 

                totalBytesRead += bytesRead
 

                'Write to stream

                s.Write(bytes, 0, bytesRead)
 

            End If
 

        Loop While bytesRead > 0
 

        s.Close()

        s.Dispose()

        s = Nothing
 

        fs.Close()

        fs.Dispose()

        fs = Nothing
 
 

         'It basically hangs here for over 10 minutes and then produces the error.

         Dim response As HttpWebResponse = DirectCast(request.GetResponse(), _

             HttpWebResponse)

Open in new window

0
Comment
Question by:VBRocks
  • 2
2 Comments
 
LVL 27

Author Comment

by:VBRocks
ID: 24426880
Oops... The base exception is:

    "An existing connection was forcibly closed by the remote host"

0
 
LVL 27

Accepted Solution

by:
VBRocks earned 0 total points
ID: 24503697
Alas...  I found the answer.  I thought it was hopeless, and had to be abandoned.  But it was not hopeless.  I was able to use the following article to make it work:

     http://support.microsoft.com/kb/908573

If you're having the same or similar problem, find out exactly what type of authentication your server is requiring (ie.:  Basic, Digest, Kerberos, Negotiate, NTLM), and then be patient and work through this Miscroft Support page.  It will help you solve your problem, and you will still be able to use the HttpWebRequest class.

0

Featured Post

Threat Intelligence Starter Resources

Integrating threat intelligence can be challenging, and not all companies are ready. These resources can help you build awareness and prepare for defense.

Join & Write a Comment

Introduction HyperText Transfer Protocol (http://www.ietf.org/rfc/rfc2616.txt) or "HTTP" is the underpinning of internet communication.  As a teacher of web development I have heard many questions, mostly from my younger students who have come to t…
A few customers have recently asked my thoughts on Password Managers.  As Security is a big part of our industry I was initially very hesitant and sceptical about giving a program all of my secret passwords.  But as I was getting asked about them mo…
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.
This video demonstrates how to create an example email signature rule for a department in a company using CodeTwo Exchange Rules. The signature will be inserted beneath users' latest emails in conversations and will be displayed in users' Sent Items…

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now