public ActionResult SetMetadata(int blocksCount, string fileName, long fileSize, int fileIndex)
{
var container = CloudStorageAccount.Parse(
ConfigurationManager.AppSettings["StorageConnectionString"]).CreateCloudBlobClient()
.GetContainerReference(ConfigurationManager.AppSettings["CloudStorageContainerReference"]);
container.CreateIfNotExists();
var fileToUpload = new CloudFile()
{
BlockCount = blocksCount,
FileName = fileName,
Size = fileSize,
BlockBlob = container.GetBlockBlobReference(fileName),
StartTime = DateTime.Now,
IsUploadCompleted = false,
UploadStatusMessage = string.Empty,
FileKey = "CurrentFile" + fileIndex.ToString(),
FileIndex = fileIndex
};
Session.Add(fileToUpload.FileKey, fileToUpload);
return Json(new { success = true, index = fileIndex });
}
private ActionResult CommitAllChunks(CloudFile model)
{
model.IsUploadCompleted = true;
bool errorInOperation = false;
try
{
var blockList = Enumerable.Range(1, (int)model.BlockCount).ToList<int>().ConvertAll(rangeElement =>
Convert.ToBase64String(Encoding.UTF8.GetBytes(
string.Format(CultureInfo.InvariantCulture, "{0:D4}", rangeElement))));
model.BlockBlob.PutBlockList(blockList);
var duration = DateTime.Now - model.StartTime;
float fileSizeInKb = model.Size / 1024;
string fileSizeMessage = fileSizeInKb > 1024 ?
string.Concat((fileSizeInKb / 1024).ToString(CultureInfo.CurrentCulture), " MB") :
string.Concat(fileSizeInKb.ToString(CultureInfo.CurrentCulture), " KB");
model.UploadStatusMessage = string.Format(CultureInfo.CurrentCulture,
"File uploaded successfully. {0} took {1} seconds to upload",
fileSizeMessage, duration.TotalSeconds);
}
catch (StorageException e)
{
model.UploadStatusMessage = "Failed to Upload file. Exception - " + e.Message;
errorInOperation = true;
}
finally
{
Session.Remove(model.FileKey);
}
return Json(new
{
error = errorInOperation,
isLastBlock = model.IsUploadCompleted,
message = model.UploadStatusMessage,
index = model.FileIndex
});
}
private JsonResult UploadCurrentChunk(CloudFile model, byte[] chunk, int id)
{
using (var chunkStream = new MemoryStream(chunk))
{
var blockId = Convert.ToBase64String(Encoding.UTF8.GetBytes(
string.Format(CultureInfo.InvariantCulture, "{0:D4}", id)));
try
{
model.BlockBlob.PutBlock(
blockId,
chunkStream, null, null,
new BlobRequestOptions()
{
RetryPolicy = new LinearRetry(TimeSpan.FromSeconds(10), 3)
},
null);
return null;
}
catch (StorageException e)
{
Session.Remove(model.FileKey);
model.IsUploadCompleted = true;
model.UploadStatusMessage = "Failed to Upload file. Exception - " + e.Message;
return Json(new { error = true, isLastBlock = false, message = model.UploadStatusMessage, index = model.FileIndex });
}
}
}