/// <summary>
/// Creates an audio stream bases on <see cref="Tenor.Security.Captcha"/> on session state.
/// </summary>
private void CaptchaAudioRequest(string captchaSessionState)
{
if (HttpContext.Current == null)
{
throw new InvalidContextException();
}
HttpSessionState session = HttpContext.Current.Session;
if (session == null)
{
throw new InvalidContextException();
}
Tenor.Security.Captcha cap = session[captchaSessionState] as Tenor.Security.Captcha;
if (cap == null)
{
cap = new Tenor.Security.Captcha();
session[captchaSessionState] = cap;
}
MemoryStream mem = new MemoryStream(cap.GenerateAudio());
CacheData dados = new CacheData();
dados.ContentType = "audio/x-wav";
dados.Expires = 0;
dados.ContentLength = mem.Length;
dados.FileName = "captcha.wav";
WriteHeaders(HttpContext.Current.ApplicationInstance, dados);
WriteStream(mem, HttpContext.Current.ApplicationInstance);
}
/// <summary>
/// Draws a captcha image based on <see cref="Tenor.Security.Captcha"/> on session state.
/// </summary>
private void CaptchaRequest(string captchaSessionState)
{
if (HttpContext.Current == null)
{
throw new InvalidContextException();
}
HttpSessionState session = HttpContext.Current.Session;
if (session == null)
{
throw new InvalidContextException();
}
Tenor.Security.Captcha cap = session[captchaSessionState] as Tenor.Security.Captcha;
if (cap == null)
{
cap = new Tenor.Security.Captcha();
session[captchaSessionState] = cap;
}
MemoryStream mem = new MemoryStream();
cap.GenerateImage().Save(mem, System.Drawing.Imaging.ImageFormat.Jpeg);
CacheData dados = new CacheData();
dados.ContentType = "image/jpeg";
dados.Expires = 0;
dados.ContentLength = mem.Length;
dados.FileName = "captcha.jpg";
WriteHeaders(HttpContext.Current.ApplicationInstance, dados);
WriteStream(mem, HttpContext.Current.ApplicationInstance);
}
