private static bool PreparationUpload(HttpWebRequest request, IEnumerable <HttpPostValue> blobs)
{
if (request == null)
{
return(false);
}
string tokenid = Guid.NewGuid().ToString(); // "D"
string boundary = "---------------" + (ulong)Hash64.GetHashCode(tokenid);
request.Method = "POST";
request.ContentType = "multipart/form-data; boundary=" + boundary;
byte[] buffer = null;
MemoryStream ms = null;
try
{
if (blobs != null)
{
ms = new MemoryStream();
buffer = new byte[570];
foreach (HttpPostValue blob in blobs)
{
if (blob == null)
{
throw new ArgumentNullException("blob");
}
if (blob.IsText)
{
byte[] cch = Encoding.UTF8.GetBytes(string.Format(
"\r\n--{0}" +
"\r\nContent-Disposition: form-data; name=\"{1}\"" +
"\r\n\r\n{2}\r\n", boundary, blob.Key, blob.Value));
ms.Write(cch, 0, cch.Length);
}
else
{
byte[] cch = Encoding.UTF8.GetBytes(string.Format(
"\r\n--{0}\r\n" +
"Content-Disposition: form-data; name=\"{1}\"; filename=\"{2}\"\r\n" +
"Content-Type: application/octet-stream\r\n\r\n", boundary, blob.Key, blob.FileName));
ms.Write(cch, 0, cch.Length);
cch = blob.Value;
if (cch != null)
{
ms.Write(cch, 0, cch.Length);
}
else
{
using (FileStream fs = new FileStream(blob.FileName, FileMode.Open, FileAccess.Read))
{
try
{
int len = 0;
while ((len = fs.Read(buffer, 0, buffer.Length)) != 0)
{
ms.Write(buffer, 0, len);
}
}
catch (Exception)
{
return(false);
}
}
}
}
}
}
if (blobs != null)
{
byte[] cch = Encoding.UTF8.GetBytes("--" + boundary + "--\r\n");
ms.Write(cch, 0, cch.Length);
}
request.ContentLength = ms.Length;
if (blobs != null)
{
using (Stream rs = request.GetRequestStream())
{
ms.Position = 0;
int len = 0;
while ((len = ms.Read(buffer, 0, buffer.Length)) != 0)
{
rs.Write(buffer, 0, len);
}
}
}
return(true);
}
catch (Exception)
{
return(false);
}
finally
{
if (ms != null)
{
ms.Dispose();
}
}
}