public async System.Threading.Tasks.Task WriteResponseStreamToFileAsync(string filePath, bool append, System.Threading.CancellationToken cancellationToken)
{
// Make sure the directory exists to write too.
FileInfo fi = new FileInfo(filePath);
Directory.CreateDirectory(fi.DirectoryName);
Stream downloadStream;
if (append && File.Exists(filePath))
downloadStream = new FileStream(filePath, FileMode.Append, FileAccess.Write, FileShare.Read, S3Constants.DefaultBufferSize);
else
downloadStream = new FileStream(filePath, FileMode.Create, FileAccess.ReadWrite, FileShare.Read, S3Constants.DefaultBufferSize);
try
{
long current = 0;
#if CORECLR
Stream stream = this.ResponseStream;
#else
Stream stream = new BufferedStream(this.ResponseStream);
#endif
byte[] buffer = new byte[S3Constants.DefaultBufferSize];
int bytesRead = 0;
long totalIncrementTransferred = 0;
while ((bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length)
.ConfigureAwait(continueOnCapturedContext: false)) > 0)
{
cancellationToken.ThrowIfCancellationRequested();
await downloadStream.WriteAsync(buffer, 0, bytesRead)
.ConfigureAwait(continueOnCapturedContext: false);
current += bytesRead;
totalIncrementTransferred += bytesRead;
if (totalIncrementTransferred >= AWSSDKUtils.DefaultProgressUpdateInterval ||
current == this.ContentLength)
{
this.OnRaiseProgressEvent(filePath, totalIncrementTransferred, current, this.ContentLength);
totalIncrementTransferred = 0;
}
}
ValidateWrittenStreamSize(current);
}
finally
{
downloadStream.Dispose();
}
}
#endif
