private async Task <Stream> GetThumbnailPng(byte[] pdfBytes, int size)
{
try
{
var inputFile = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
var outputFile = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
await File.WriteAllBytesAsync(inputFile, pdfBytes);
GhostscriptWrapper.GenerateThumbnail(inputFile, outputFile);
var resultStream = new MemoryStream();
using (var image = Image.Load(outputFile))
{
image.Mutate(ctx => ctx.Resize(size, size * image.Height / image.Width));
image.SaveAsJpeg(resultStream);
}
File.Delete(inputFile);
File.Delete(outputFile);
resultStream.Seek(0, SeekOrigin.Begin);
return(resultStream);
}
catch (Exception ex)
{
this.logger.LogWarning(ex.Message);
return(Stream.Null);
}
}
