internal override bool Write(string fullFilename, long contentLength, Stream stream, out string md5, out ErrorCode error)
{
error = ErrorCode.None;
md5 = null;
if (String.IsNullOrEmpty(fullFilename))
{
throw new ArgumentNullException(nameof(fullFilename));
}
if (contentLength < 0)
{
throw new ArgumentException("Invalid content length.");
}
if (stream == null || !stream.CanRead)
{
throw new ArgumentException("Unable to read stream.");
}
try
{
if (contentLength < 1)
{
CreateEmptyFile(fullFilename);
return(true);
}
else
{
int bytesRead = 0;
byte[] buffer = new byte[_StreamReadBufferSize];
long bytesRemaining = contentLength;
using (MemoryStream ms = new MemoryStream()) // so we can compute hash
{
using (FileStream fs = new FileStream(fullFilename, FileMode.OpenOrCreate))
{
while (bytesRemaining > 0)
{
bytesRead = stream.ReadAsync(buffer, 0, _StreamReadBufferSize).Result;
fs.Write(buffer, 0, bytesRead);
ms.Write(buffer, 0, bytesRead); // so we can compute the hash
bytesRemaining -= bytesRead;
}
}
ms.Seek(0, SeekOrigin.Begin);
md5 = Common.Md5(ms);
}
error = ErrorCode.Success;
return(true);
}
}
catch (Exception e)
{
error = SetErrorCode(e);
return(false);
}
}
internal override bool WriteRange(string fullFilename, long position, long contentLength, Stream stream, out string md5, out ErrorCode error)
{
error = ErrorCode.None;
md5 = null;
if (String.IsNullOrEmpty(fullFilename))
{
throw new ArgumentNullException(nameof(fullFilename));
}
if (position < 0)
{
throw new ArgumentException("Position must be zero or greater");
}
if (contentLength < 1)
{
throw new ArgumentException("Invalid content length.");
}
if (stream == null || !stream.CanRead)
{
throw new ArgumentException("Unable to read stream.");
}
try
{
using (FileStream fs = new FileStream(fullFilename, FileMode.OpenOrCreate))
{
fs.Seek(position, SeekOrigin.Begin);
int bytesRead = 0;
byte[] buffer = new byte[_StreamReadBufferSize];
long bytesRemaining = contentLength;
while (bytesRemaining > 0)
{
bytesRead = stream.ReadAsync(buffer, 0, _StreamReadBufferSize).Result;
fs.Write(buffer, 0, bytesRead);
bytesRemaining -= bytesRead;
}
// compute hash of the entire file
if (fs.CanSeek)
{
fs.Seek(0, SeekOrigin.Begin);
}
md5 = Common.Md5(fs);
error = ErrorCode.Success;
return(true);
}
}
catch (Exception e)
{
error = SetErrorCode(e);
return(false);
}
}