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Uploading large Files with HttpWebRequest (AllowWriteSteamBuffering doesnt solve this)


I tried several Methods, and a kind of internal chunked Upload (but the Chunked-Property of the HttpWebRequest is false) works:

            long bytesRead = 0;
            long splitBytes = 1000000;  // ≈ 1
Mb
            int dataPacks =
(int)Math.Ceiling((double)file.FileSize/splitBytes);
            FileStream fileStream = new
FileStream(file.Path, FileMode.Open,
FileAccess.Read);
            byte[] fileBuffer = new
byte[splitBytes];
            Stream requestStream =
request.GetRequestStream();
            requestStream.Write(postBuffer, 0,
postBuffer.Length);
            while (fileStream.Read(fileBuffer, 0,
fileBuffer.Length) != 0)
            {
                if (bytesRead + splitBytes <=
file.FileSize)
                {
                   
requestStream.Write(fileBuffer, 0,
fileBuffer.Length);
                    fileStream.Flush();
                    bytesRead += splitBytes;
                }
                else
                {
                   
requestStream.Write(fileBuffer, 0,
(int)(file.FileSize - bytesRead));
                    fileStream.Flush();
                    bytesRead += (file.FileSize -
bytesRead);
                }
            }

It works even on servers which don't accept a real-chunked upload.


Categories : C#

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