public async Task <string> UploadAsync(FileType fileType, UploadFileProperties uploadFileProperties, Stream streamToUpload)
{
var blobClient = cloudStorageAccount.CreateCloudBlobClient();
var containerReference = blobClient.GetContainerReference(fileType.ToString().ToLower());
var blobName = GetBlobName(uploadFileProperties.FileName);
var blobReference = containerReference.GetBlockBlobReference(blobName);
blobReference.Metadata.Add(FileNameMetadata, uploadFileProperties.FileName);
blobReference.Properties.ContentType = uploadFileProperties.ContentType;
blobReference.Properties.ContentDisposition = uploadFileProperties.ContentDisposition;
Func <Task <string> > uploadDelegate = async() =>
{
await blobReference.UploadFromStreamAsync(streamToUpload);
Log.Information($"{blobName} was uploaded to storage");
return(blobName);
};
try
{
// try to upload file assuming container exists
return(await uploadDelegate());
}
catch (StorageException e)
{
// case when container was not created yet
if (e.RequestInformation.HttpStatusCode == 404)
{
Log.Warning(e, "Exception while uploading file");
await EnsureContainerExists(containerReference);
return(await uploadDelegate());
}
Log.Error(e, "Failed to upload a file to storage");
throw;
}
}
public async Task <FileStorageWriteStream> GetWriteStreamAsync(FileType fileType, UploadFileProperties uploadFileProperties)
{
var blobClient = cloudStorageAccount.CreateCloudBlobClient();
var containerReference = blobClient.GetContainerReference(fileType.ToString().ToLower());
var blobName = GetBlobName(uploadFileProperties.FileName);
var blobReference = containerReference.GetBlockBlobReference(blobName);
blobReference.Metadata.Add(FileNameMetadata, uploadFileProperties.FileName);
blobReference.Properties.ContentType = uploadFileProperties.ContentType;
blobReference.Properties.ContentDisposition = uploadFileProperties.ContentDisposition;
Func <Task <FileStorageWriteStream> > openStreamDelegate = async() =>
{
var stream = await blobReference.OpenWriteAsync();
Log.Information($"Write stream to storage was opened for {blobName}");
return(new FileStorageWriteStream {
Id = blobName, Stream = stream
});
};
try
{
// try to open stream assuming container exists
return(await openStreamDelegate());
}
catch (StorageException e)
{
// case when container was not created yet
if (e.RequestInformation.HttpStatusCode == 404)
{
Log.Warning(e, "Exception while opening a write stream to storage");
await EnsureContainerExists(containerReference);
return(await openStreamDelegate());
}
Log.Error(e, "Failed to open a write stream to storage");
throw;
}
}
