/// <summary>
/// Enables processing of HTTP Web requests by a custom HttpHandler that implements the <see cref="T:System.Web.IHttpHandler"/> interface.
/// </summary>
/// <param name="filterContext">An <see cref="T:System.Web.HttpContext"/> object that provides references to the intrinsic server objects (for example, Request, Response, Session, and Server) used to service HTTP requests.</param>
public void ProcessRequest(HttpContext context)
{
// get the unique GUID of the captcha; this must be passed in via the querystring
string guid = context.Request.QueryString["guid"];
CaptchaImage ci = CaptchaImage.GetCachedCaptcha(guid);
if (String.IsNullOrEmpty(guid) || ci == null)
{
context.Response.StatusCode = 404;
context.Response.StatusDescription = "Not Found";
context.Response.End();
return;
}
// write the image to the HTTP output stream as an array of bytes
using (Bitmap b = ci.RenderImage())
{
b.Save(context.Response.OutputStream, ImageFormat.Gif);
}
context.Response.ContentType = "image/gif";
context.Response.StatusCode = 200;
context.Response.StatusDescription = "OK";
context.Response.End();
}
protected void Page_Load(object sender, EventArgs e)
{
//captcha = new CaptchaImage();
this.captcha.TextLength = 5;
this.captcha.LineNoise = CaptchaImage.LineNoiseLevel.Low;
Bitmap objBMP = captcha.RenderImage();
//This is to add the string to session cookie, to be compared later
Session.Add("randomStr", captcha.Text);
HttpCookie aCookie = new HttpCookie("randomStr");
//aCookie.Domain = ".dailyinfo.vn";
aCookie.Values["value"] = captcha.Text;
Response.Cookies.Add(aCookie);
//' Set the content type and return the image
Response.ContentType = "image/GIF";
objBMP.Save(Response.OutputStream, ImageFormat.Gif);
objBMP.Dispose();
}
public static void Main()
{
for (int i = 0; i < 1000; ++i)
{
var img = new CaptchaImage();
img.RenderImage().Save(".\\images\\" + img.Text + ".bmp");
}
}
public static void Main()
{
for (int i = 0; i < 1000; ++i)
{
var img = new CaptchaImage();
img.RenderImage().Save(".\\images\\" + img.Text + ".bmp");
}
}
/// <summary>
/// 验证码 GET: /User/ValidCode/1234
/// </summary>
/// <param name="aid"></param>
/// <returns></returns>
public ActionResult ValidCode(string aid)
{
CaptchaImage ci = CaptchaImage.CreateCaptcha(aid);
using (Bitmap b = ci.RenderImage())
{
b.Save(Response.OutputStream, ImageFormat.Jpeg);
}
Response.ContentType = "image/jpeg";
Response.StatusCode = 200;
Response.StatusDescription = "OK";
return(null);
}
public FileResult Image(string id)
{
CaptchaImage captchaImage = CaptchaImageCache.GetCachedCaptcha(id);
using (MemoryStream stream = new MemoryStream())
{
if (captchaImage != null)
{
using (Bitmap bitmap = captchaImage.RenderImage())
{
bitmap.Save(stream, ImageFormat.Png);
}
}
else
{
LogContext.LogInformation("Iamge is not found in cache (CaptchaController method Image)", "CaptchaController", "captchaImage.Id = " + id);
}
return(File(stream.ToArray(), "image/png"));
}
}
public override void ExecuteResult(ControllerContext context)
{
var ci = new CaptchaImage {
Height = Convert.ToInt32(context.HttpContext.Request.QueryString["height"]), Width = Convert.ToInt32(context.HttpContext.Request.QueryString["width"])
};
var guid = ci.Text;
if (context.HttpContext.Session != null)
{
context.HttpContext.Session["RandomCode"] = guid;
}
using (var b = ci.RenderImage())
{
b.Save(context.HttpContext.Response.OutputStream, ImageFormat.Gif);
}
context.HttpContext.Response.ContentType = "image/png";
context.HttpContext.Response.StatusCode = 200;
context.HttpContext.Response.StatusDescription = "OK";
context.HttpContext.ApplicationInstance.CompleteRequest();
}