public async Task <StoredFileInfo> StoreAsync(IFormFile file, CancellationToken cancellationToken = default)
{
_ = file ?? throw new ArgumentNullException(nameof(file));
var fileId = Guid.NewGuid().ToString();
IGridFSBucket bucket = getBucket(_dbClient);
StoredFileInfo fileInfo = await uploadFile(fileId, file, bucket, cancellationToken);
return(fileInfo);
}
private async Task <StoredFileInfo> uploadFile(string fileId, IFormFile file, IGridFSBucket bucket, CancellationToken cancellationToken = default)
{
var fileInfo = new StoredFileInfo
{
FileId = fileId,
FileName = file.FileName,
ContentType = file.ContentType,
Length = file.Length
};
using Stream fileStream = file.OpenReadStream();
var uploadOptions = new GridFSUploadOptions
{
Metadata = BsonDocument.Parse(JsonSerializer.Serialize(fileInfo)),
};
// assigning filename in gridfs to fileid(for filtering by FileName while downloading file)
_ = await bucket.UploadFromStreamAsync(fileId, fileStream, uploadOptions, cancellationToken);
return(fileInfo);
}