Uploading files doesn't work correctly
hi!
since WebClient.UploadFile() always uploads the file into the form named "file", i can't use it. so i made my own function:
Code:
static private string UploadFile(string url, string path)
{
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
string boundary = DateTime.Now.Ticks.ToString("x");
byte[] boundary_ = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
string header = "Content-Disposition: form-data; name=\"archivo\"; filename=\"" + Path.GetFileName(path) + "\"\r\nContent-Type: application/octet-stream\r\n\r\n";
byte[] header_ = Encoding.ASCII.GetBytes(header);
req.ContentType = "multipart/form-data; boundary=" + boundary;
req.Method = "POST";
req.KeepAlive = true;
req.AllowAutoRedirect = false;
req.ContentLength = boundary_.Length * 2 + header_.Length + new FileInfo(path).Length;
Stream stream = req.GetRequestStream();
stream.Write(boundary_, 0, boundary_.Length);
stream.Write(header_, 0, header_.Length);
FileStream file = File.OpenRead(path);
byte[] buffer = new byte[4096];
int read = 0;
int prg = 0;
int count = 0;
DateTime last = DateTime.Now;
while ((read = file.Read(buffer, 0, buffer.Length)) > 0)
{
try
{
stream.Write(buffer, 0, read);
}
catch
{
SharedFunctions.Error("The server rejected the file at a status of " + SharedFunctions.SizeName(prg) + "/" + SharedFunctions.SizeName(Convert.ToInt32(file.Length)) + ".\nThis could be because the file exceeded the maximum upload file size of the server.");
stream = null;
break;
}
prg += read;
count += read;
int per = prg * 100 / Convert.ToInt32(file.Length);
prgUpload.Value = per;
lblUploadProgress.Text = per + " %";
if ((DateTime.Now - last).Seconds > 0)
{
last = DateTime.Now;
lblUploadSpeed.Text = SharedFunctions.SizeName(count) + "/s";
lblUploadTimeleft.Text = Convert.ToString(TimeSpan.FromSeconds(Convert.ToDouble((file.Length - prg) / count)));
count = 0;
}
Application.DoEvents();
}
file.Close();
if (stream != null)
{
stream.Write(boundary_, 0, boundary_.Length);
stream.Close();
WebResponse res = req.GetResponse();
string ret = res.Headers[HttpResponseHeader.Location];
res.Close();
return ret;
}
else
{
return "";
}
}
you see the exception handler? thats where stream.Write() causes an exception "connection was aborted; connection was canceled".
this usually happens to files above ~3 MB.
does anyone know why this keeps happening?
thank you so much!
