/// <summary>
/// Generation CAPTCHA
/// </summary>
/// <param name="encryptText">The text for captcha</param>
public void Create(string encryptText)
{
try
{
if (Request.UrlReferrer.AbsolutePath == Request.Url.AbsolutePath)
{
throw new Exception();
}
var encryptorModel = CaptchaHelper.GetEncryptorModel();
var generateImage = CaptchaHelper.GetGenerateImage();
if (string.IsNullOrEmpty(encryptText) || (encryptorModel == null))
{
throw new ArgumentException();
}
var captchaText = CaptchaHelper.GetEncryption().Decrypt(encryptText, encryptorModel.Password, encryptorModel.Salt);
var capthaBmp = generateImage.Generate(captchaText);
Response.ContentType = "image/gif";
capthaBmp.Save(Response.OutputStream, ImageFormat.Gif);
}
catch (Exception)
{
Response.ContentType = "image/gif";
ErrorBitmap().Save(Response.OutputStream, ImageFormat.Gif);
}
}
