public async Task <BlobDownloadModel> DownloadBlob(String blobName, BlobHelper.Repository repo)
{
var ipAddress = GetIPAddress();
var isDev = ipAddress.StartsWith("192.168");
if (isDev)
{
blobName = "dev-" + blobName;
}
// TODO: You must implement this helper method. It should retrieve blob info
// from your database, based on the blobId. The record should contain the
// blobName, which you should return as the result of this helper method.
if (!String.IsNullOrEmpty(blobName))
{
var container = BlobHelper.GetBlobContainer(repo);
var blob = container.GetBlockBlobReference(blobName);
// Download the blob into a memory stream. Notice that we’re not putting the memory
// stream in a using statement. This is because we need the stream to be open for the
// API controller in order for the file to actually be downloadable. The closing and
// disposing of the stream is handled by the Web API framework.
var ms = new MemoryStream();
await blob.DownloadToStreamAsync(ms);
// Strip off any folder structure so the file name is just the file name
var lastPos = blob.Name.LastIndexOf('/');
var fileName = blob.Name.Substring(lastPos + 1, blob.Name.Length - lastPos - 1);
// Build and return the download model with the blob stream and its relevant info
var download = new BlobDownloadModel
{
BlobStream = ms,
BlobFileName = fileName,
BlobLength = blob.Properties.Length,
BlobContentType = blob.Properties.ContentType
};
return(download);
}
// Otherwise
return(null);
}
public Task DownloadToStream(String blobName, Stream str, BlobHelper.Repository repo)
{
var ipAddress = GetIPAddress();
var isDev = ipAddress.StartsWith("192.168");
if (isDev)
{
blobName = "dev-" + blobName;
}
// TODO: You must implement this helper method. It should retrieve blob info
// from your database, based on the blobId. The record should contain the
// blobName, which you should return as the result of this helper method.
if (!String.IsNullOrEmpty(blobName))
{
var container = BlobHelper.GetBlobContainer(repo);
var blob = container.GetBlockBlobReference(blobName);
return(blob.DownloadToStreamAsync(str));
}
return(null);
}
public async Task <BlobUploadModel> UploadBlob(String key, String mediaType, FileStream fileStream, BlobHelper.Repository repo)
{
var ipAddress = GetIPAddress();
var isDev = ipAddress.StartsWith("192.168");
if (isDev)
{
key = "dev-" + key;
}
// Retrieve reference to a blob
var blobContainer = BlobHelper.GetBlobContainer(repo);
var blob = blobContainer.GetBlockBlobReference(key);
// Set the blob content type
blob.Properties.ContentType = mediaType;
// Upload file into blob storage, basically copying it from local disk into Azure
fileStream.Position = 0;
blob.UploadFromStream(fileStream);
// Create blob upload model with properties from blob info
var blobUpload = new BlobUploadModel
{
FileName = blob.Name,
FileUrl = blob.Uri.AbsoluteUri,
FileSizeInBytes = blob.Properties.Length
};
return(blobUpload);
}
