//exception boundary: chunk upload exceptions should be propagated to here but no farther
private Task <PartUploadResult> AttemptPartUploadWithRetry(Func <FilePart, Task> attemptUpload, FilePart part, int retryCount)
{
if (retryCount < 0)
{
return(TaskFromResult(PartUploadResult.Error));
}
return(attemptUpload(part).ContinueWith(uploadTask =>
{
if (uploadTask.Exception != null)
{
// Always back out progress if part fails
updateProgress(part.Length * -1);
if (retryCount > 0)
{
return AttemptPartUploadWithRetry(attemptUpload, part, retryCount - 1).Result;
}
else
{
return PartUploadResult.Exception(uploadTask.Exception.Unwrap());
}
}
else
{
return PartUploadResult.Success;
}
}));
}
public async Task <PartUploadResult> UploadPartAsync(string bucketName, string objectKey, string uploadId, uint partNumber, byte[] partBytes)
{
using (var partUploadResult = await Task.Run(() => SWIG.storj_uplink.uplink_upload_part(_access._project, bucketName, objectKey, uploadId, partNumber)).ConfigureAwait(false))
{
PartUploadResult result = new PartUploadResult(partUploadResult.part_upload);
if (partUploadResult.error != null && !string.IsNullOrEmpty(partUploadResult.error.message))
{
result.Error = partUploadResult.error.message;
}
else
{
try
{
result.BytesWritten = await Task.Run(() => DoUnsafeUpload(partUploadResult.part_upload, objectKey, partBytes)).ConfigureAwait(false);
}
catch (Exception ex)
{
result.Error = ex.Message;
}
}
return(result);
}
}
