Images are posted to the session uploadurl using
multipart/form-data post. Uploading happens outside of the API, for now the response comes back as an
XML result.
public string UploadFiles(string uploadurl, string[] files)
{
string boundary = "----------------------------" + DateTime.Now.Ticks.ToString("x");
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uploadurl);
request.Method = "POST";
request.KeepAlive = true;
request.ContentType = "multipart/form-data; boundary=" + boundary;
Stream memStream = new System.IO.MemoryStream();
var bbytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
var endbytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "--");
string headerTemplate =
"Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n" +
"Content-Type: application/octet-stream\r\n\r\n";
for (int i = 0; i < files.Length; i++)
{
memStream.Write(bbytes, 0, bbytes.Length);
var header = string.Format(headerTemplate, "file", Path.GetFileName(files[i]));
var headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
memStream.Write(headerbytes, 0, headerbytes.Length);
using (var fileStream = new FileStream(files[i], FileMode.Open, FileAccess.Read))
{
var buffer = new byte[1024];
var bytesRead = 0;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
memStream.Write(buffer, 0, bytesRead);
}
}
}
memStream.Write(endbytes, 0, endbytes.Length);
request.ContentLength = memStream.Length;
using (Stream requestStream = request.GetRequestStream())
{
memStream.Position = 0;
byte[] tempBuffer = new byte[memStream.Length];
memStream.Read(tempBuffer, 0, tempBuffer.Length);
memStream.Close();
requestStream.Write(tempBuffer, 0, tempBuffer.Length);
}
using (var response = request.GetResponse())
{
using (Stream s = response.GetResponseStream())
{
using (var r = new StreamReader(s))
{
return r.ReadToEnd();
}
}
}
}