Here is the function it happens in:
I get the exception on the marked row, when I am writing to the stream. I am not sure why I get it but it only happens when I use the function to upload a file to a local server, meaning that it goes at 1 megabyte/s instead of ~100 kB/s.
The weird thing is that it always happens after a certain amount of time. It uploads for like 2 minutes, then I get the error.
Any clue to why this happens?
Code:
public static string UploadFile(string uploadfile, string url, int speedLimit, string fileFormName, string contenttype, NameValueCollection querystring, CookieContainer cookies)
{
if (String.IsNullOrEmpty(fileFormName))
{
fileFormName = "file";
}
if (String.IsNullOrEmpty(contenttype))
{
contenttype = "application/octet-stream";
}
string postdata = string.Empty;
if (querystring != null)
{
postdata += "?";
foreach (string key in querystring.Keys)
{
postdata += key + "=" + querystring.Get(key) + "&";
}
}
Uri uri = new Uri(url + postdata);
string boundary = "----------" + DateTime.Now.Ticks.ToString("x");
HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(uri);
webrequest.CookieContainer = cookies;
webrequest.ContentType = "multipart/form-data; boundary=" + boundary;
webrequest.Method = "POST";
webrequest.Timeout = 3600 * 1000;
webrequest.ReadWriteTimeout = 3600 * 1000;
// Build up the post message header
StringBuilder sb = new StringBuilder();
sb.Append("--");
sb.Append(boundary);
sb.Append("\r\n");
sb.Append("Content-Disposition: form-data; name=\"");
sb.Append(fileFormName);
sb.Append("\"; filename=\"");
sb.Append(Path.GetFileName(uploadfile));
sb.Append("\"");
sb.Append("\r\n");
sb.Append("Content-Type: ");
sb.Append(contenttype);
sb.Append("\r\n");
sb.Append("\r\n");
string postHeader = sb.ToString();
byte[] postHeaderBytes = Encoding.UTF8.GetBytes(postHeader);
// Build the trailing boundary string as a byte array
// ensuring the boundary appears on a line by itself
byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
FileStream fileStream = new FileStream(uploadfile, FileMode.Open, FileAccess.Read);
long length = postHeaderBytes.Length + fileStream.Length + boundaryBytes.Length;
webrequest.ContentLength = length;
Stream requestStream = webrequest.GetRequestStream();
requestStream.WriteTimeout = 5 * 3600 * 1000;
requestStream.ReadTimeout = 5 * 3600 * 1000;
// Write out our post header
requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
// Write out the file contents
byte[] buffer = new Byte[checked((uint)Math.Min(4096, (int)fileStream.Length))];
int bytesRead;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
requestStream.Write(buffer, 0, bytesRead); //On this row
decimal speedDelay = 1000 / (speedLimit / (buffer.Length / (decimal)1000));
Thread.Sleep((int)Math.Round(speedDelay, MidpointRounding.ToEven));
}
// Write out the trailing boundary
requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);
WebResponse responce = webrequest.GetResponse();
Stream s = responce.GetResponseStream();
StreamReader sr = new StreamReader(s);
return sr.ReadToEnd();
}The weird thing is that it always happens after a certain amount of time. It uploads for like 2 minutes, then I get the error.
Any clue to why this happens?