public override void ExecuteResult(ControllerContext context)
{
string text = context.HttpContext.Request.ServerVariables["Query_String"];
if (text.Contains("&"))
{
text = text.Split(new char[]
{
'&'
})[0];
}
MvcCaptchaImage cachedCaptcha = MvcCaptchaImage.GetCachedCaptcha(text);
if (string.IsNullOrEmpty(text) || cachedCaptcha == null)
{
context.HttpContext.Response.StatusCode = 404;
context.HttpContext.Response.StatusDescription = "Not Found";
context.HttpContext.Response.End();
return;
}
cachedCaptcha.ResetText();
using (Bitmap bitmap = cachedCaptcha.RenderImage())
{
bitmap.Save(context.HttpContext.Response.OutputStream, ImageFormat.Gif);
}
context.HttpContext.Response.Cache.SetNoStore();
context.HttpContext.Response.Cache.SetCacheability(HttpCacheability.NoCache);
context.HttpContext.Response.ContentType = "image/gif";
context.HttpContext.Response.StatusCode = 200;
context.HttpContext.Response.StatusDescription = "OK";
context.HttpContext.ApplicationInstance.CompleteRequest();
}
private static MvcHtmlString MvcCaptcha(this HtmlHelper helper, string actionName, string controllerName, MvcCaptchaOptions options)
{
if (options == null)
{
options = new MvcCaptchaOptions();
}
MvcCaptchaImage mvcCaptchaImage = new MvcCaptchaImage(options);
HttpContext.Current.Session.Add(mvcCaptchaImage.UniqueId, mvcCaptchaImage);
UrlHelper urlHelper = new UrlHelper(helper.ViewContext.RequestContext);
StringBuilder stringBuilder = new StringBuilder(1500);
stringBuilder.Append("\r\n<!--MvcCaptcha 1.1 for ASP.NET MVC 2 RC Copyright:2009-2010 Webdiyer (http://www.webdiyer.com)-->\r\n");
stringBuilder.Append("<input type=\"hidden\" name=\"_mvcCaptchaGuid\" id=\"_mvcCaptchaGuid\"");
if (options.DelayLoad)
{
stringBuilder.Append("/><script language=\"javascript\" type=\"text/javascript\">if (typeof (jQuery) == \"undefined\") { alert(\"jQuery脚本库未加载，请检查！\"); }");
stringBuilder.Append("var _mvcCaptchaPrevGuid = null,_mvcCaptchaImgLoaded = false;function _loadMvcCaptchaImage(){");
stringBuilder.Append("if(!_mvcCaptchaImgLoaded){$.ajax({type:'GET',url:'");
stringBuilder.Append(urlHelper.Action("MvcCaptchaLoader", "_MvcCaptcha", new RouteValueDictionary
{
{
"area",
null
}
}));
stringBuilder.Append("?'+_mvcCaptchaPrevGuid,global:false,success:function(data){_mvcCaptchaImgLoaded=true;");
stringBuilder.Append("$(\"#_mvcCaptchaGuid\").val(data);_mvcCaptchaPrevGuid=data;$(\"#");
stringBuilder.Append(options.CaptchaImageContainerId).Append("\").html('");
stringBuilder.Append(MvcCaptchaHelper.CreateImgTag(urlHelper.Action(actionName, controllerName, new RouteValueDictionary
{
{
"area",
null
}
}) + "?'+data+'", options, null));
stringBuilder.Append("');}});} };function _reloadMvcCaptchaImage(){_mvcCaptchaImgLoaded=false;_loadMvcCaptchaImage();};$(function(){");
stringBuilder.Append("if($(\"#").Append(options.ValidationInputBoxId).Append("\").length==0){alert(\"未能找到验证码输入文本框，请检查ValidationInputBoxId属性是否设置正确！\");}");
stringBuilder.Append("if($(\"#").Append(options.CaptchaImageContainerId).Append("\").length==0){alert(\"未能找到验证码图片父容器，请检查CaptchaImageContainerId属性是否设置正确！\");}");
stringBuilder.Append("$(\"#").Append(options.ValidationInputBoxId);
stringBuilder.Append("\").bind(\"focus\",_loadMvcCaptchaImage)});</script>");
}
else
{
stringBuilder.AppendFormat(" value=\"{0}\" />", mvcCaptchaImage.UniqueId);
stringBuilder.Append(MvcCaptchaHelper.CreateImgTag(urlHelper.Action(actionName, controllerName, new RouteValueDictionary
{
{
"area",
null
}
}) + "?" + mvcCaptchaImage.UniqueId, options, mvcCaptchaImage.UniqueId));
stringBuilder.Append("<script language=\"javascript\" type=\"text/javascript\">function _reloadMvcCaptchaImage(){var ci=document.getElementById(\"");
stringBuilder.Append(mvcCaptchaImage.UniqueId);
stringBuilder.Append("\");var sl=ci.src.length;if(ci.src.indexOf(\"&\")>-1)sl=ci.src.indexOf(\"&\");ci.src=ci.src.substr(0,sl)+\"&\"+(new Date().valueOf());}</script>");
}
stringBuilder.Append("\r\n<!--MvcCaptcha 1.1 for ASP.NET MVC 2 RC Copyright:2009-2010 Webdiyer (http://www.webdiyer.com)-->\r\n");
return MvcHtmlString.Create(stringBuilder.ToString());
}
internal Bitmap RenderImage()
{
Bitmap bitmap = new Bitmap(this.CaptchaOptions.Width, this.CaptchaOptions.Height, PixelFormat.Format24bppRgb);
using (Graphics graphics = Graphics.FromImage(bitmap))
{
graphics.SmoothingMode = SmoothingMode.AntiAlias;
graphics.Clear(Color.White);
int num = 0;
double num2 = (double)(this.CaptchaOptions.Width / this.CaptchaOptions.TextLength);
string text = this.Text;
for (int i = 0; i < text.Length; i++)
{
char c = text[i];
using (Font font = this.GetFont())
{
using (Brush brush = new SolidBrush(this.GetRandomColor()))
{
Rectangle rectangle = new Rectangle(Convert.ToInt32((double)num * num2), 0, Convert.ToInt32(num2), this.CaptchaOptions.Height);
GraphicsPath graphicsPath = MvcCaptchaImage.TextPath(c.ToString(), font, rectangle);
this.WarpText(graphicsPath, rectangle);
graphics.FillPath(brush, graphicsPath);
num++;
}
}
}
Rectangle rect = new Rectangle(new Point(0, 0), bitmap.Size);
this.AddNoise(graphics, rect);
this.AddLine(graphics, rect);
}
return(bitmap);
}
public ActionResult MvcCaptchaLoader()
{
string text = base.Request.ServerVariables["Query_String"];
if (!string.IsNullOrEmpty(text))
{
base.HttpContext.Session.Remove(text);
}
MvcCaptchaOptions mvcCaptchaOptions = new MvcCaptchaOptions();
MvcCaptchaConfigSection config = MvcCaptchaConfigSection.GetConfig();
if (config != null)
{
mvcCaptchaOptions.TextChars = config.TextChars;
mvcCaptchaOptions.TextLength = config.TextLength;
mvcCaptchaOptions.FontWarp = config.FontWarp;
mvcCaptchaOptions.BackgroundNoise = config.BackgroundNoise;
mvcCaptchaOptions.LineNoise = config.LineNoise;
}
MvcCaptchaImage mvcCaptchaImage = new MvcCaptchaImage(mvcCaptchaOptions);
base.HttpContext.Session.Add(mvcCaptchaImage.UniqueId, mvcCaptchaImage);
base.HttpContext.Response.Cache.SetNoStore();
base.HttpContext.Response.Cache.SetCacheability(HttpCacheability.NoCache);
return(base.Content(mvcCaptchaImage.UniqueId));
}
private static MvcHtmlString MvcCaptcha(this HtmlHelper helper, string actionName, string controllerName, MvcCaptchaOptions options)
{
if (options == null)
{
options = new MvcCaptchaOptions();
}
MvcCaptchaImage mvcCaptchaImage = new MvcCaptchaImage(options);
HttpContext.Current.Session.Add(mvcCaptchaImage.UniqueId, mvcCaptchaImage);
UrlHelper urlHelper = new UrlHelper(helper.ViewContext.RequestContext);
StringBuilder stringBuilder = new StringBuilder(1500);
stringBuilder.Append("\r\n<!--MvcCaptcha 1.1 for ASP.NET MVC 2 RC Copyright:2009-2010 Webdiyer (http://www.webdiyer.com)-->\r\n");
stringBuilder.Append("<input type=\"hidden\" name=\"_mvcCaptchaGuid\" id=\"_mvcCaptchaGuid\"");
if (options.DelayLoad)
{
stringBuilder.Append("/><script language=\"javascript\" type=\"text/javascript\">if (typeof (jQuery) == \"undefined\") { alert(\"jQuery脚本库未加载，请检查！\"); }");
stringBuilder.Append("var _mvcCaptchaPrevGuid = null,_mvcCaptchaImgLoaded = false;function _loadMvcCaptchaImage(){");
stringBuilder.Append("if(!_mvcCaptchaImgLoaded){$.ajax({type:'GET',url:'");
stringBuilder.Append(urlHelper.Action("MvcCaptchaLoader", "_MvcCaptcha", new RouteValueDictionary
{
{
"area",
null
}
}));
stringBuilder.Append("?'+_mvcCaptchaPrevGuid,global:false,success:function(data){_mvcCaptchaImgLoaded=true;");
stringBuilder.Append("$(\"#_mvcCaptchaGuid\").val(data);_mvcCaptchaPrevGuid=data;$(\"#");
stringBuilder.Append(options.CaptchaImageContainerId).Append("\").html('");
stringBuilder.Append(MvcCaptchaHelper.CreateImgTag(urlHelper.Action(actionName, controllerName, new RouteValueDictionary
{
{
"area",
null
}
}) + "?'+data+'", options, null));
stringBuilder.Append("');}});} };function _reloadMvcCaptchaImage(){_mvcCaptchaImgLoaded=false;_loadMvcCaptchaImage();};$(function(){");
stringBuilder.Append("if($(\"#").Append(options.ValidationInputBoxId).Append("\").length==0){alert(\"未能找到验证码输入文本框，请检查ValidationInputBoxId属性是否设置正确！\");}");
stringBuilder.Append("if($(\"#").Append(options.CaptchaImageContainerId).Append("\").length==0){alert(\"未能找到验证码图片父容器，请检查CaptchaImageContainerId属性是否设置正确！\");}");
stringBuilder.Append("$(\"#").Append(options.ValidationInputBoxId);
stringBuilder.Append("\").bind(\"focus\",_loadMvcCaptchaImage)});</script>");
}
else
{
stringBuilder.AppendFormat(" value=\"{0}\" />", mvcCaptchaImage.UniqueId);
stringBuilder.Append(MvcCaptchaHelper.CreateImgTag(urlHelper.Action(actionName, controllerName, new RouteValueDictionary
{
{
"area",
null
}
}) + "?" + mvcCaptchaImage.UniqueId, options, mvcCaptchaImage.UniqueId));
stringBuilder.Append("<script language=\"javascript\" type=\"text/javascript\">function _reloadMvcCaptchaImage(){var ci=document.getElementById(\"");
stringBuilder.Append(mvcCaptchaImage.UniqueId);
stringBuilder.Append("\");var sl=ci.src.length;if(ci.src.indexOf(\"&\")>-1)sl=ci.src.indexOf(\"&\");ci.src=ci.src.substr(0,sl)+\"&\"+(new Date().valueOf());}</script>");
}
stringBuilder.Append("\r\n<!--MvcCaptcha 1.1 for ASP.NET MVC 2 RC Copyright:2009-2010 Webdiyer (http://www.webdiyer.com)-->\r\n");
return(MvcHtmlString.Create(stringBuilder.ToString()));
}
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
string text = filterContext.HttpContext.Request.Form["_MvcCaptchaGuid"];
MvcCaptchaImage cachedCaptcha = MvcCaptchaImage.GetCachedCaptcha(text);
string text2 = filterContext.HttpContext.Request.Form[this.Field];
string text3 = (cachedCaptcha == null) ? string.Empty : cachedCaptcha.Text;
if (string.IsNullOrEmpty(text2) || string.IsNullOrEmpty(text3) || !string.Equals(text2, text3, StringComparison.OrdinalIgnoreCase))
{
((Controller)filterContext.Controller).ModelState.AddModelError(this.Field, (string)filterContext.HttpContext.GetGlobalResourceObject("LangPack", "ValidationCode_Not_Match"));
}
if (!IsRetainSession)
{
filterContext.HttpContext.Session.Remove(text);
}
}
public ActionResult MvcCaptchaLoader()
{
string text = base.Request.ServerVariables["Query_String"];
if (!string.IsNullOrEmpty(text))
{
base.HttpContext.Session.Remove(text);
}
MvcCaptchaOptions mvcCaptchaOptions = new MvcCaptchaOptions();
MvcCaptchaConfigSection config = MvcCaptchaConfigSection.GetConfig();
if (config != null)
{
mvcCaptchaOptions.TextChars = config.TextChars;
mvcCaptchaOptions.TextLength = config.TextLength;
mvcCaptchaOptions.FontWarp = config.FontWarp;
mvcCaptchaOptions.BackgroundNoise = config.BackgroundNoise;
mvcCaptchaOptions.LineNoise = config.LineNoise;
}
MvcCaptchaImage mvcCaptchaImage = new MvcCaptchaImage(mvcCaptchaOptions);
base.HttpContext.Session.Add(mvcCaptchaImage.UniqueId, mvcCaptchaImage);
base.HttpContext.Response.Cache.SetNoStore();
base.HttpContext.Response.Cache.SetCacheability(HttpCacheability.NoCache);
return base.Content(mvcCaptchaImage.UniqueId);
}