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2010-12-08T22:04:01.780
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<p>Following code is working:</p> <pre><code>Imports System.Net Imports System.Text Imports System.IO Public Class HttpFileUploader Public Function uploadFile(ByVal containa As CookieContainer, ByVal uri As String, ByVal filePath As String, ByVal fileParameterName As String, ByVal contentType As String, ByVal otherParameters As Specialized.NameValueCollection) As String Dim boundary As String = "---------------------------" & DateTime.Now.Ticks.ToString("x") Dim newLine As String = System.Environment.NewLine Dim boundaryBytes As Byte() = System.Text.Encoding.ASCII.GetBytes(newLine & "--" & boundary & newLine) Dim request As Net.HttpWebRequest = Net.WebRequest.Create(uri) request.ContentType = "multipart/form-data; boundary=" & boundary request.Method = "POST" request.CookieContainer = containa request.AllowAutoRedirect = True request.Timeout = -1 request.KeepAlive = True request.AllowWriteStreamBuffering = False Dim ms As New MemoryStream() Dim formDataTemplate As String = "Content-Disposition: form-data; name=""{0}""{1}{1}{2}" For Each key As String In otherParameters.Keys ms.Write(boundaryBytes, 0, boundaryBytes.Length) Dim formItem As String = String.Format(formDataTemplate, key, newLine, otherParameters(key)) Dim formItemBytes As Byte() = System.Text.Encoding.UTF8.GetBytes(formItem) ms.Write(formItemBytes, 0, formItemBytes.Length) Next key ms.Write(boundaryBytes, 0, boundaryBytes.Length) Dim headerTemplate As String = "Content-Disposition: form-data; name=""{0}""; filename=""{1}""{2}Content-Type: {3}{2}{2}" Dim header As String = String.Format(headerTemplate, fileParameterName, filePath, newLine, contentType) Dim headerBytes As Byte() = System.Text.Encoding.UTF8.GetBytes(header) ms.Write(headerBytes, 0, headerBytes.Length) Dim length As Long = ms.Length length += New FileInfo(filePath).Length request.ContentLength = length Using requestStream As IO.Stream = request.GetRequestStream() Dim bheader() As Byte = ms.ToArray() requestStream.Write(bheader, 0, bheader.Length) Using fileStream As New IO.FileStream(filePath, IO.FileMode.Open, IO.FileAccess.Read) Dim buffer(4096) As Byte Dim bytesRead As Int32 = fileStream.Read(buffer, 0, buffer.Length) Do While (bytesRead > 0) requestStream.Write(buffer, 0, bytesRead) bytesRead = fileStream.Read(buffer, 0, buffer.Length) Loop End Using requestStream.Close() End Using Dim response As Net.WebResponse = Nothing Dim responseText = "" Try response = request.GetResponse() Using responseStream As IO.Stream = response.GetResponseStream() Using responseReader As New IO.StreamReader(responseStream) responseText = responseReader.ReadToEnd() End Using End Using Catch exception As Net.WebException MsgBox(exception.Message) Finally response.Close() response = Nothing request = Nothing End Try Return responseText End Function End Class </code></pre> <p>Many many thanks to Tom and the guy from <a href="http://blogs.msdn.com/b/johan/archive/2006/11/15/are-you-getting-outofmemoryexceptions-when-uploading-large-files.aspx" rel="nofollow">http://blogs.msdn.com/b/johan/archive/2006/11/15/are-you-getting-outofmemoryexceptions-when-uploading-large-files.aspx</a>!!!</p>
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1. POHttpWebRequest FileUpload causes OutOfMemoryException
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1. POHttpWebRequest FileUpload causes OutOfMemoryException
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