/// <summary>
/// Returns full path to a file after saving it to Azure Blob Storage.
/// </summary>
/// <param name="userId">The id of the user who uploads.</param>
/// <param name="fileName">Slugged filename with ext.</param>
/// <param name="year">Upload year.</param>
/// <param name="month">Upload month.</param>
/// <param name="content">The content of file.</param>
/// <param name="appId">Which app it uploaded it.</param>
/// <returns></returns>
public async Task <string> SaveFileAsync(int userId, string fileName, string year, string month, byte[] content, EAppType appId)
{
// blobName "blog/1/2017/11/filename", container is "media"
string blobName = string.Format("{0}/{1}/{2}/{3}/{4}",
appId.ToString().ToLowerInvariant(),
userId,
year,
month,
fileName);
// get a ref to blob which does not call server
var blob = _container.GetBlockBlobReference(blobName);
// make sure blob is unique
int i = 1;
while (await blob.ExistsAsync())
{
blobName = blobName.Insert(blobName.LastIndexOf('.'), $"-{i}");
blob = _container.GetBlockBlobReference(blobName);
}
// set content type
blob.Properties.ContentType = MimeTypeMap.GetMimeType(Path.GetExtension(fileName));
// create blob with contents
await blob.UploadFromByteArrayAsync(content, 0, content.Length);
return(blob.Uri.ToString());
}
/// <summary>
/// Returns relative path to a file after saving it on the file system.
/// </summary>
/// <param name="userId">The id of the user who uploads.</param>
/// <param name="fileName">Slugged filename with ext.</param>
/// <param name="year">Upload year.</param>
/// <param name="month">Upload month.</param>
/// <param name="content">The content of file.</param>
/// <param name="appId">Which app it uploaded it.</param>
/// <returns></returns>
public async Task <string> SaveFileAsync(int userId, string fileName, string year, string month, byte[] content, EAppType appId)
{
// app name
var appName = appId.ToString().ToLowerInvariant();
// dir to save this file in
var dirPath = string.Format("{0}\\{1}\\{2}\\{3}\\{4}\\{5}",
_hostingEnvironment.WebRootPath,
_appSettings.MediaContainerName,
appName,
userId,
year,
month);
// make sure dir exists
if (!Directory.Exists(dirPath))
{
Directory.CreateDirectory(dirPath);
}
// combine dir and filename
var filePath = Path.Combine(dirPath, fileName);
// make sure file is unique
int i = 1;
while (File.Exists(filePath))
{
fileName = fileName.Insert(fileName.LastIndexOf('.'), $"-{i}");
filePath = Path.Combine(dirPath, fileName);
}
// save file to file sys
using (var targetStream = File.Create(filePath))
using (MemoryStream stream = new MemoryStream(content))
{
await stream.CopyToAsync(targetStream);
}
// returns relative path
return($"{_appSettings.MediaContainerName}/{appName}/{userId}/{year}/{month}/{fileName}");
}