I'm trying to upload some files to a server.
My code looks like:
public void HttpUploadFile(string url, string file, string paramName, string contentType, NameValueCollection nvc, string cookie)
{
try
{
string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
SetStatus("Making request");
HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url);
wr.ContentType = "multipart/form-data; boundary=" + boundary;
wr.Method = "POST";
wr.Headers["Cookie"] = cookie;
wr.KeepAlive = true;
wr.Credentials = System.Net.CredentialCache.DefaultCredentials;
Stream rs = wr.GetRequestStream();
string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}";
SetStatus("Parsing values");
foreach (string key in nvc.Keys)
{
rs.Write(boundarybytes, 0, boundarybytes.Length);
string formitem = string.Format(formdataTemplate, key, nvc[key]);
byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
rs.Write(formitembytes, 0, formitembytes.Length);
}
rs.Write(boundarybytes, 0, boundarybytes.Length);
SetStatus("Reading file");
string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n";
string header = string.Format(headerTemplate, paramName, file, contentType);
byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
rs.Write(headerbytes, 0, headerbytes.Length);
FileStream fileStream = new FileStream(file, FileMode.Open, FileAccess.Read);
byte[] buffer = new byte[4096];
int bytesRead = 0;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
rs.Write(buffer, 0, bytesRead);
}
fileStream.Close();
SetStatus("Sending request");
byte[] trailer = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n");
rs.Write(trailer, 0, trailer.Length);
rs.Close();
HttpWebResponse wresp = null;
wresp = (HttpWebResponse)wr.GetResponse();
if (wresp.StatusCode != HttpStatusCode.OK)
{
throw new Exception("File was not uploaded successfully.");
}
SetStatus("Success");
}
catch
{
statusLabel.ForeColor = Color.Red;
SetStatus("Failure");
}
}
An call it in this way:
void uploader_DoWork2(object sender, DoWorkEventArgs e)
{
NameValueCollection c = new NameValueCollection();
c.Add("chunk", "0");
c.Add("name", Path.GetFileName(filenameBox.Text));
c.Add("chunks", "1");
HttpUploadFile("https://site.com/upload.php", filenameBox.Text, "file", GetContentType(filenameBox.Text), c, loginCookies);
}
The script works fine and files are uploaded if these are < 2MB. If the file is larger than 2MB it return success even if the file was not successfully uploaded. I think the files larger than 2MB should be splited in chunks and then send to server. But I have no idea how to split file then send to server in chunks...
