public async Task <Stream> Get(string key)
{
var stream = new MemoryStream();
await _fs.DownloadToStreamAsync(ObjectId.Parse(key), stream).ConfigureAwait(false);
stream.Position = 0;
return(stream);
}
async Task <DocumentInfo?> IQueryHandler <GetImgQuery, DocumentInfo?> .Handle(GetImgQuery query, CancellationToken cancellationToken)
{
var filter = Builders <GridFSFileInfo> .Filter.Eq(info => info.Filename, query.ImageId.ToString());
var fileInfo = (await _gridFs.FindAsync(filter, null, cancellationToken)).FirstOrDefault();
if (fileInfo == null)
{
return(null);
}
var memstream = new MemoryStream();
await _gridFs.DownloadToStreamAsync(fileInfo.Id, memstream, cancellationToken : cancellationToken);
return(new DocumentInfo(
id: query.ImageId,
memoryStream: memstream,
contentType: fileInfo.Metadata["ContentType"].ToString(),
length: fileInfo.Length,
fileName: fileInfo.Metadata.Contains("FileName") ? fileInfo.Metadata["FileName"].ToString() : "",
nonUniqueExtId: fileInfo.Metadata.Contains("NonUniqueExtId") ? fileInfo.Metadata["NonUniqueExtId"].ToString() : ""
));
}