internal MvcCaptchaImage(MvcCaptchaOptions options)
 {
     CaptchaOptions = options;
     _UniqueId = Guid.NewGuid().ToString("N");
     _rand = new Random();
     //Text = GenerateRandomText();
 }
 public CaptchaImage(MvcCaptchaOptions otion, string familyName)
 {
     _UniqueId = Guid.NewGuid().ToString("N");
     _captchaOptions = otion;
     text = GenerateRandomText();
     SetDimensions(otion.Width, otion.Height);
     SetFamilyName(familyName);
 }
 private static string CreateImgTag(string url, MvcCaptchaOptions options, string id)
 {
     var sb = new StringBuilder("<a href=\"javascript:_reloadMvcCaptchaImage()\"><img src=\"");
     sb.Append(url);
     sb.Append("\" alt=\"MvcCaptcha\" title=\"" + CaptchaResource.Refresh + "\" width=\"");
     sb.Append(options.Width);
     sb.Append("\" height=\"");
     sb.Append(options.Height);
     if (!string.IsNullOrEmpty(id))
         sb.Append("\" id=\"").Append(id);
     sb.Append("\" border=\"0\"/></a><a href=\"javascript:_reloadMvcCaptchaImage()\">")
         .Append(options.ReloadLinkText)
         .Append("</a>");
     return sb.ToString();
 }
        public ActionResult MvcCaptchaLoader()
        {
            var prevGuid = Request.ServerVariables["Query_String"];
            if (!string.IsNullOrEmpty(prevGuid))
                Session.Remove(prevGuid);
            var options = new MvcCaptchaOptions();
            var config = MvcCaptchaConfigSection.GetConfig();
            if (config != null)
            {
                options.TextChars = config.TextChars;
                options.TextLength = config.TextLength;
                options.FontWarp = config.FontWarp;
                options.BackgroundNoise = config.BackgroundNoise;
                options.LineNoise = config.LineNoise;
            }

            var image = new MvcCaptchaImage(options);
            Session.Add(
                image.UniqueId,
                image);
            Response.Cache.SetNoStore();
            Response.Cache.SetCacheability(HttpCacheability.NoCache);
            return Content(image.UniqueId);
        }
 public CaptchaImage(MvcCaptchaOptions otion)
     : this(otion, "Consolas")
 {
 }
        private static MvcHtmlString MvcCaptcha(this HtmlHelper helper, string actionName, string controllerName,
            MvcCaptchaOptions options)
        {
            if (options == null)
                options = new MvcCaptchaOptions();
            var image = new MvcCaptchaImage(options);
            HttpContext.Current.Session.Add(
                image.UniqueId,
                image);
            var url = new UrlHelper(helper.ViewContext.RequestContext);
            var sb = new StringBuilder(1500);
            const string copyrightText =
                "\r\n<!--MvcCaptcha 1.2 @Webdiyer (http://www.webdiyer.com) update by Jingbo from www.tsharp.org-->\r\n";
            sb.Append(copyrightText);
            sb.Append("<input type=\"hidden\" name=\"_mvcCaptchaGuid\" id=\"_mvcCaptchaGuid\"");

            if (options.DelayLoad)
            {
                sb.Append(
                        "/><script language=\"javascript\" type=\"text/javascript\">if (typeof (jQuery) == \"undefined\") { alert(\"")
                    .Append(CaptchaResource.JQueryNotLoadedPleaseEnsureThat)
                    .Append(
                        "\"); } var _mvcCaptchaPrevGuid = null,_mvcCaptchaImgLoaded = false;function _loadMvcCaptchaImage(){");
                sb.Append("if(!_mvcCaptchaImgLoaded){$.ajax({type:'GET',url:'");
                sb.Append(url.Action("MvcCaptchaLoader", "_MvcCaptcha", new RouteValueDictionary { { "area", null } }));
                sb.Append("?'+_mvcCaptchaPrevGuid,global:false,success:function(data){_mvcCaptchaImgLoaded=true;");
                sb.Append("$(\"#_mvcCaptchaGuid\").val(data);_mvcCaptchaPrevGuid=data;$(\"#");
                sb.Append(options.CaptchaImageContainerId).Append("\").html('");
                sb.Append(
                    CreateImgTag(
                        url.Action(actionName, controllerName, new RouteValueDictionary { { "area", null } }) + "?'+data+'",
                        options, null));
                sb.Append(
                    "');}});} };function _reloadMvcCaptchaImage(){_mvcCaptchaImgLoaded=false;_loadMvcCaptchaImage();};$(function(){");
                sb.Append("if($(\"#")
                    .Append(options.ValidationInputBoxId)
                    .Append("\").length==0){alert(\"")
                    .AppendFormat(CaptchaResource.Unfound_ValidationInputBoxId_PleaseCheck, options.ValidationInputBoxId)
                    .Append("\");}");
                sb.Append("if($(\"#")
                    .Append(options.CaptchaImageContainerId)
                    .Append("\").length==0){alert(\"")
                    .AppendFormat(CaptchaResource.Unfound_CaptchaImageContainerId_PleaseCheck,
                        options.CaptchaImageContainerId)
                    .Append("\");}");
                sb.Append("$(\"#").Append(options.ValidationInputBoxId);
                sb.Append("\").bind(\"focus\",_loadMvcCaptchaImage)});</script>");
            }
            else
            {
                sb.AppendFormat(" value=\"{0}\" />", image.UniqueId);
                sb.Append(
                    CreateImgTag(
                        url.Action(actionName, controllerName, new RouteValueDictionary { { "area", null } }) + "?" +
                        image.UniqueId, options, image.UniqueId));
                sb.Append(
                    "<script language=\"javascript\" type=\"text/javascript\">function _reloadMvcCaptchaImage(){var ci=document.getElementById(\"");
                sb.Append(image.UniqueId);
                sb.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>");
            }
            sb.Append(copyrightText);
            return MvcHtmlString.Create(sb.ToString());
        }
 public static MvcHtmlString MvcCaptcha(this HtmlHelper helper, MvcCaptchaOptions options)
 {
     return MvcCaptcha(helper, "MvcCaptchaImage", "_MvcCaptcha", options);
 }