public async Task <FileContentResult> Post()
{
using var reader = new StreamReader(Request.Body);
var requestBody = await reader.ReadToEndAsync();
reader.Close();
if (requestBody.Length < 23)
{
return(new FileContentResult(new byte[] {}, "text/plain"));
}
var imageBase64 = RemoveDataUrlPrefix(requestBody);
var imageBytes = Convert.FromBase64String(imageBase64);
await using var ms = new MemoryStream(imageBytes, 0, imageBytes.Length);
_imageProcessor.SetImage(ms);
var qrCodeMontage = _imageProcessor.GenerateMontage();
return(File(qrCodeMontage.ToByteArray(MagickFormat.Png), "image/png"));
}