private IActionResult DeliverAsset(string appId, MediaItem?media, MediaFileQueryDto?query)
{
query ??= new MediaFileQueryDto();
if (media == null)
{
return(NotFound());
}
var resizeOptions = query.ToResizeOptions();
FileCallback callback;
if (query.CacheDuration > 0)
{
Response.Headers[HeaderNames.CacheControl] = $"public,max-age={query.CacheDuration}";
}
var contentLength = (long?)null;
if (media.Type == MediaType.Image && resizeOptions.IsValid)
{
callback = async(bodyStream, range, ct) =>
{
var resizedAsset = $"{appId}_{media.FileName}_{resizeOptions}";
if (query.ForceResize)
{
await ResizeAsync(appId, media, bodyStream, resizedAsset, resizeOptions, true, ct);
}
else
{
try
{
await assetStore.DownloadAsync(resizedAsset, bodyStream, ct : ct);
}
catch (AssetNotFoundException)
{
await ResizeAsync(appId, media, bodyStream, resizedAsset, resizeOptions, false, ct);
}
}
};
}
else
{
contentLength = media.FileSize;
callback = async(bodyStream, range, ct) =>
{
await mediaFileStore.DownloadAsync(appId, media, bodyStream, range, ct);
};
}
return(new FileCallbackResult(media.MimeType, callback)
{
EnableRangeProcessing = contentLength > 0,
ErrorAs404 = true,
FileDownloadName = media.FileName,
FileSize = contentLength,
SendInline = query.Download != 1
});
}
