private void DoCaptcha(HttpContext context)
{
Color f = ColorTranslator.FromHtml(CaptchaImage.FGColorDef);
Color b = ColorTranslator.FromHtml(CaptchaImage.BGColorDef);
Color n = ColorTranslator.FromHtml(CaptchaImage.NColorDef);
Bitmap captchaImg = CaptchaImage.GetCaptchaImage(f, b, n);
if (captchaImg == null)
{
context.Response.StatusCode = 404;
context.Response.StatusDescription = "Not Found";
context.ApplicationInstance.CompleteRequest();
return;
}
context.Response.ContentType = "image/x-png";
using (MemoryStream memStream = new MemoryStream()) {
captchaImg.Save(memStream, ImageFormat.Png);
memStream.WriteTo(context.Response.OutputStream);
}
context.Response.StatusCode = 200;
context.Response.StatusDescription = "OK";
context.ApplicationInstance.CompleteRequest();
captchaImg.Dispose();
context.Response.End();
}
private string GetCaptchaImageURI()
{
if (this.IsWebView)
{
return("/CarrotwareCaptcha.axd?t=" + DateTime.Now.Ticks +
"&fgcolor=" + CaptchaImage.EncodeColor(ColorTranslator.ToHtml(this.ForeColor)) +
"&bgcolor=" + CaptchaImage.EncodeColor(ColorTranslator.ToHtml(this.BackColor)) +
"&ncolor=" + CaptchaImage.EncodeColor(ColorTranslator.ToHtml(this.NoiseColor)));
}
else
{
return("/CarrotwareCaptcha.axd?t=" + DateTime.Now.Ticks);
}
}
protected override void RenderContents(HtmlTextWriter output)
{
var key = CaptchaImage.GetKey();
output.Write("<div style=\"clear: both;\" id=\"" + this.ClientID + "_wrapper\">\r\n");
if (!string.IsNullOrEmpty(this.ValidationMessage))
{
output.Write("<div");
if (this.IsValid)
{
output.Write(this.CaptchaIsValidStyle.ToString());
}
else
{
output.Write(this.CaptchaIsNotValidStyle.ToString());
}
output.Write(" id=\"" + this.ClientID + "_msg\">\r\n");
output.Write(this.ValidationMessage);
output.Write("\r\n</div>\r\n");
}
string sJSFuncName = "Show_" + this.ClientID;
output.Write("<div" + this.CaptchaImageBoxStyle.ToString() + "> ");
output.Write("<a href=\"javascript:" + sJSFuncName + "();\"> <img" + this.CaptchaImageStyle.ToString() + " title=\"" + key + "\" alt=\"" + key + "\" border=\"0\" id=\""
+ this.ClientID + "_img\" src=\"" + GetCaptchaImageURI() + "\" /> </a> \r\n");
output.Write("</div>\r\n");
output.Write("<div" + this.CaptchaInstructionStyle.ToString() + ">" + this.Instructions + " </div>\r\n");
output.Write("<div" + this.CaptchaTextStyle.ToString() + "><input type=\"text\" id=\"" + this.ClientID + "\" name=\"" + this.UniqueID + "\" value=\"" + HttpUtility.HtmlEncode(this.CaptchaText) + "\" /> </div>\r\n");
output.Write("\r\n<script type=\"text/javascript\">\r\n");
output.Write("\r\nfunction " + sJSFuncName + "(){\r\n");
if (!string.IsNullOrEmpty(key))
{
output.Write("alert('" + key.Substring(0, 3) + "' + '" + key.Substring(3) + "');\r\n");
}
else
{
output.Write("alert('no code');\r\n");
}
output.Write("}\r\n");
output.Write("</script>\r\n");
output.Write("\r\n</div>\r\n");
}
public bool Validate()
{
this.IsValid = CaptchaImage.Validate(this.CaptchaText);
if (!this.IsValid)
{
this.ValidationMessage = this.IsNotValidMessage;
}
else
{
this.ValidationMessage = this.IsValidMessage;
}
return(this.IsValid);
}
