public async Task ProcessAsync(Services.Minio.Minio minio, Record record)
{
if (!_buckets.Contains(record.S3.Bucket.Name)) // Only file in the right bucket
{
return;
}
var created = record.EventName.StartsWith("s3:ObjectCreated:");
var removed = !created && record.EventName.StartsWith("s3:ObjectRemoved:");
if (created || removed)
{
var mimeType = record.S3.Object.ContentType;
if (mimeType == null)
{
new FileExtensionContentTypeProvider().TryGetContentType(record.S3.Object.Key, out mimeType);
}
if (!_acceptedFormats.Contains(mimeType)) // Supported mimetypes
{
return;
}
var lastDotIndex = record.S3.Object.Key.LastIndexOf('.');
var ext = record.S3.Object.Key.Substring(lastDotIndex + 1);
var fileName = System.Web.HttpUtility.UrlDecode(record.S3.Object.Key.Substring(0, lastDotIndex));
if (Regex.IsMatch(fileName, @".+_\d+$"))
{
return; // File already resized.
}
if (created)
{
Bitmap source;
using (var memoryStream = new MemoryStream())
{
await minio.Client.GetObjectAsync(
record.S3.Bucket.Name,
System.Web.HttpUtility.UrlDecode(record.S3.Object.Key),
(stream) => stream.CopyTo(memoryStream));
source = MediaService.GetBipmapFromStream(memoryStream);
}
foreach (var size in _thumbnailSize)
{
try
{
using (var memoryStream = new MemoryStream())
{
var resized = MediaService.ResizeBitmap(source, size, size);
var resizedFileName = fileName + "_" + size + "." + ext;
resized.Save(memoryStream, MediaService.MimeTypeToImageFormat(record.S3.Object.ContentType));
memoryStream.Position = 0;
Console.WriteLine("Uploading resized file: " + resizedFileName + ", size: " + memoryStream.Length);
await minio.Client.PutObjectAsync(
record.S3.Bucket.Name,
resizedFileName,
memoryStream,
-1,
mimeType,
metaData : record.S3.Object.UserMetadata);
}
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
throw;
}
}
}
else if (removed)
{
IObservable <Item> observable = minio.Client.ListObjectsAsync(record.S3.Bucket.Name, fileName, true);
observable.Subscribe <Item>(async item =>
{
if (Regex.IsMatch(item.Key, fileName + @"_\d+\." + ext + "$"))
{
await minio.Client.RemoveObjectAsync("img", System.Web.HttpUtility.UrlDecode(item.Key));
}
});
}
}
}