public static string GetScript(ScriptIds ids, string token)
{
var script = @"(function (v, t) {
if (!t) t = 'hidden';
var chk = function () {
var elem = document.getElementById('" + ids.ScriptId + @"');
document.getElementById('" + ids.HoneyPotContainerId + @"').style.display = 'none';
if (elem) {
var newElem = document.createElement('div');
newElem.innerHTML = '<input type=""' + t + '"" name=""" + ids.TokenId + @""" value=""' + v + '"" />';
elem.parentNode.appendChild(newElem);
elem.parentNode.removeChild(elem);
} else {
window.setTimeout(chk, 500);
}
};
window.setTimeout(chk, 500);
document.getElementById('" + ids.HoneyPotContainerId + @"').style.display = 'none';
}('" + token + @"'));";
var compressor = new JavaScriptCompressor
{
Encoding = Encoding.UTF8,
DisableOptimizations = false,
ObfuscateJavascript = true,
PreserveAllSemicolons = true,
IgnoreEval = true,
ThreadCulture = Globalization.CultureInfo.InvariantCulture
};
var example = compressor.Compress(script);
return example;
}
/// <summary>
/// Writes a CAPTTIA element to the form.
/// </summary>
/// <param name="html"></param>
/// <param name="request"></param>
/// <returns></returns>
public static MvcHtmlString Capttia(this HtmlHelper html, HttpRequestBase request)
{
var config = ConfigurationManager.GetSection("capttia") as CapttiaSection;
var encryption = new Encryption();
var ids = new ScriptIds(config.ModuleName);
string contextId = GetContextId(request, config, encryption);
// Place it in a cookie
var cookieContextId = encryption.Encrypt(contextId, config.PassPhraseB);
request.RequestContext.HttpContext.Response.SetCookie(new HttpCookie(config.CookieName, cookieContextId) { HttpOnly = true });
// Place it on the form
var formId = encryption.Encrypt(contextId, config.PassPhrase);
var token = JavaScript.EncodeForSingleQuotes(formId);
return MvcHtmlString.Create(GetHoneyPot(ids) + GetScriptElement(ids, token));
}
public static string GetScriptElement(ScriptIds ids, string token)
{
return @"<script id=""" + ids.ScriptId + @""">" + GetScript(ids, token) + "</script>";
}
public static string GetHoneyPot(ScriptIds ids)
{
return @"<div id=""" + ids.HoneyPotContainerId + @"""><input type=""text"" name=""" + ids.HoneyPotInputId + @""" value=""""></div>";
}
