public string Decrypt(string text)
{
AESController aes = new AESController();
if (aes.HasError())
{
return(aes.error);
}
return(aes.Decrypt(text));
}
public HttpResponseMessage GetQr(string text)
{
try
{
AESController aes = new AESController();
if (aes.HasError())
{
throw new Exception(aes.error);
}
string textoEncriptado = aes.Encrypt(text);
if (aes.HasError())
{
throw new Exception(aes.error);
}
string path = HttpContext.Current.Server.MapPath("/qrcode.png");
var qrEncoder = new QrEncoder(ErrorCorrectionLevel.H);
var qrCode = qrEncoder.Encode(textoEncriptado);
var renderer = new GraphicsRenderer(new FixedModuleSize(5, QuietZoneModules.Two), Brushes.Black, Brushes.White);
using (var stream = new FileStream(path, FileMode.Create))
{
renderer.WriteToStream(qrCode.Matrix, ImageFormat.Png, stream);
}
var file = new FileStream(path, FileMode.Open, FileAccess.Read);
HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
result.Content = new StreamContent(file);
result.Content.Headers.ContentType = new MediaTypeHeaderValue("image/jpeg");
return(result);
}
catch (Exception ex)
{
HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.BadRequest);
result.Content = new StringContent(ex.Message);
result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
return(result);
}
}
private async void Scanner()
{
var scannerPage = new ZXingScannerPage();
scannerPage.Title = "Lector de QR";
scannerPage.OnScanResult += (result) =>
{
scannerPage.IsScanning = false;
Device.BeginInvokeOnMainThread(() =>
{
Navigation.PopAsync();
AESController aes = new AESController();
if (aes.HasError())
{
DisplayAlert("Error: ", aes.error, "OK");
}
else
{
string textDecrypt = aes.Decrypt(result.Text);
if (aes.HasError())
{
DisplayAlert("Se produjo un error:", textDecrypt, "OK");
}
else
{
DisplayAlert("Valor Obtenido", textDecrypt, "OK");
}
}
});
};
await Navigation.PushAsync(scannerPage);
}
