private string getCaptchaImageUrl(DNTCaptchaTagHelperHtmlAttributes captchaAttributes, string encryptedText)
{
var values = new CaptchaImageParams
{
Text = encryptedText,
RndDate = DateTime.Now.Ticks.ToString(),
ForeColor = captchaAttributes.ForeColor,
BackColor = captchaAttributes.BackColor,
FontSize = captchaAttributes.FontSize,
FontName = captchaAttributes.FontName
};
var encryptSerializedValues = _captchaProtectionProvider.Encrypt(_serializationProvider.Serialize(values));
var actionUrl = captchaAttributes.UseRelativeUrls ?
_urlHelper.Action(action: nameof(DNTCaptchaImageController.Show),
controller: nameof(DNTCaptchaImageController).Replace("Controller", string.Empty),
values: new { data = encryptSerializedValues, area = "" }) :
_urlHelper.Action(action: nameof(DNTCaptchaImageController.Show),
controller: nameof(DNTCaptchaImageController).Replace("Controller", string.Empty),
values: new { data = encryptSerializedValues, area = "" },
protocol: _httpContextAccessor.HttpContext.Request.Scheme);
if (string.IsNullOrWhiteSpace(actionUrl))
{
throw new NullReferenceException("It's not possible to determine the URL of the `DNTCaptchaImageController.Show` method. Please register the `services.AddControllers()` and `endpoints.MapControllerRoute(...)`.");
}
return(actionUrl);
}
/// <summary>
/// Creates DNTCaptcha
/// </summary>
/// <param name="captchaAttributes">captcha attributes</param>
public DNTCaptchaApiResponse CreateDNTCaptcha(DNTCaptchaTagHelperHtmlAttributes captchaAttributes)
{
if (captchaAttributes == null)
{
throw new ArgumentNullException(nameof(captchaAttributes));
}
if (_httpContextAccessor.HttpContext == null)
{
throw new InvalidOperationException("`_httpContextAccessor.HttpContext` is null.");
}
var number = _randomNumberProvider.NextNumber(captchaAttributes.Min, captchaAttributes.Max);
var randomText = _captchaTextProvider(captchaAttributes.DisplayMode).GetText(number, captchaAttributes.Language);
var encryptedText = _captchaProtectionProvider.Encrypt(randomText);
var captchaImageUrl = getCaptchaImageUrl(captchaAttributes, encryptedText);
var captchaDivId = Invariant($"{_captchaOptions.CaptchaClass}{Guid.NewGuid():N}{_randomNumberProvider.NextNumber(captchaAttributes.Min, captchaAttributes.Max)}");
var cookieToken = $".{captchaDivId}";
var hiddenInputToken = _captchaProtectionProvider.Encrypt(cookieToken);
_captchaStorageProvider.Add(_httpContextAccessor.HttpContext, cookieToken, randomText);
return(new DNTCaptchaApiResponse
{
DntCaptchaImgUrl = captchaImageUrl,
DntCaptchaId = captchaDivId,
DntCaptchaTextValue = encryptedText,
DntCaptchaTokenValue = hiddenInputToken
});
}
public IActionResult Refresh(string rndDate, DNTCaptchaTagHelperHtmlAttributes model)
{
_captchaStorageProvider.Remove(HttpContext, model.CaptchaToken);
var tagHelper = HttpContext.RequestServices.GetRequiredService <DNTCaptchaTagHelper>();
tagHelper.BackColor = model.BackColor;
tagHelper.FontName = model.FontName;
tagHelper.FontSize = model.FontSize;
tagHelper.ForeColor = model.ForeColor;
tagHelper.Language = model.Language;
tagHelper.Max = model.Max;
tagHelper.Min = model.Min;
tagHelper.Placeholder = model.Placeholder;
tagHelper.TextBoxClass = model.TextBoxClass;
tagHelper.TextBoxTemplate = model.TextBoxTemplate;
tagHelper.ValidationErrorMessage = model.ValidationErrorMessage;
tagHelper.ValidationMessageClass = model.ValidationMessageClass;
tagHelper.RefreshButtonClass = model.RefreshButtonClass;
var tagHelperContext = new TagHelperContext(
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: Guid.NewGuid().ToString("N"));
var tagHelperOutput = new TagHelperOutput(
tagName: "div",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent(string.Empty);
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
tagHelper.ViewContext = ViewContext ?? new ViewContext(
new ActionContext(this.HttpContext, HttpContext.GetRouteData(), ControllerContext.ActionDescriptor),
new FakeView(),
new ViewDataDictionary(new EmptyModelMetadataProvider(), new ModelStateDictionary())
{
Model = null
},
new TempDataDictionary(this.HttpContext, _tempDataProvider),
TextWriter.Null,
new HtmlHelperOptions());
tagHelper.Process(tagHelperContext, tagHelperOutput);
var attrs = new StringBuilder();
foreach (var attr in tagHelperOutput.Attributes)
{
attrs.Append($" {attr.Name}='{attr.Value}'");
}
var content = $"<div {attrs}>{tagHelperOutput.Content.GetContent()}</div>";
return(Content(content));
}
private string getCaptchaImageUrl(DNTCaptchaTagHelperHtmlAttributes captchaAttributes, string encryptedText)
{
var actionUrl = Url.Action(action: nameof(DNTCaptchaImageController.Show),
controller: nameof(DNTCaptchaImageController).Replace("Controller", string.Empty),
values:
new
{
text = encryptedText,
rndDate = DateTime.Now.Ticks,
foreColor = captchaAttributes.ForeColor,
backColor = captchaAttributes.BackColor,
fontSize = captchaAttributes.FontSize,
fontName = captchaAttributes.FontName,
area = ""
},
protocol: HttpContext.Request.Scheme);
return(actionUrl);
}
private string getCaptchaImageUrl(DNTCaptchaTagHelperHtmlAttributes captchaAttributes, string encryptedText)
{
return("");
//var actionUrl = Url.Action(action: nameof(DNTCaptchaImageController.Show),
// controller: nameof(DNTCaptchaImageController).Replace("Controller", string.Empty),
// values:
// new
// {
// text = encryptedText,
// rndDate = DateTime.Now.Ticks,
// foreColor = captchaAttributes.ForeColor,
// backColor = captchaAttributes.BackColor,
// fontSize = captchaAttributes.FontSize,
// fontName = captchaAttributes.FontName,
// area = ""
// },
// protocol: HttpContext.Request.Scheme);
//return actionUrl;
}
private string getCaptchaImageUrl(DNTCaptchaTagHelperHtmlAttributes captchaAttributes, string encryptedText)
{
var values = new CaptchaImageParams
{
Text = encryptedText,
RndDate = DateTime.Now.Ticks.ToString(),
ForeColor = captchaAttributes.ForeColor,
BackColor = captchaAttributes.BackColor,
FontSize = captchaAttributes.FontSize,
FontName = captchaAttributes.FontName
};
var encryptSerializedValues = _captchaProtectionProvider.Encrypt(_serializationProvider.Serialize(values));
var actionUrl = Url.Action(action: nameof(DNTCaptchaImageController.Show),
controller: nameof(DNTCaptchaImageController).Replace("Controller", string.Empty),
values: new { data = encryptSerializedValues, area = "" },
protocol: HttpContext.Request.Scheme);
return(actionUrl);
}
/// <summary>
/// Creates DNTCaptcha
/// </summary>
/// <param name="captchaAttributes">captcha attributes</param>
public DNTCaptchaApiResponse CreateDNTCaptcha(DNTCaptchaTagHelperHtmlAttributes captchaAttributes)
{
var number = _randomNumberProvider.Next(captchaAttributes.Min, captchaAttributes.Max);
var randomText = _captchaTextProvider(captchaAttributes.DisplayMode).GetText(number, captchaAttributes.Language);
var encryptedText = _captchaProtectionProvider.Encrypt(randomText);
var captchaImageUrl = getCaptchaImageUrl(captchaAttributes, encryptedText);
var captchaDivId = $"dntCaptcha{Guid.NewGuid():N}{_randomNumberProvider.Next(captchaAttributes.Min, captchaAttributes.Max)}";
var cookieToken = $".{captchaDivId}";
var hiddenInputToken = _captchaProtectionProvider.Encrypt(cookieToken);
_captchaStorageProvider.Add(_httpContextAccessor.HttpContext, cookieToken, randomText);
return(new DNTCaptchaApiResponse
{
DntCaptchaImgUrl = captchaImageUrl,
DntCaptchaId = captchaDivId,
DntCaptchaTextValue = encryptedText,
DntCaptchaTokenValue = hiddenInputToken
});
}
public IActionResult CreateDNTCaptcha([FromBody] DNTCaptchaTagHelperHtmlAttributes captchaAttributes)
{
var number = _randomNumberProvider.Next(captchaAttributes.Min, captchaAttributes.Max);
var randomText = _humanReadableIntegerProvider.NumberToText(number, captchaAttributes.Language);
var encryptedText = _captchaProtectionProvider.Encrypt(randomText);
var captchaImageUrl = getCaptchaImageUrl(captchaAttributes, encryptedText);
var captchaDivId = $"dntCaptcha{Guid.NewGuid().ToString("N")}{_randomNumberProvider.Next(captchaAttributes.Min, captchaAttributes.Max)}";
var cookieToken = $".{captchaDivId}";
var hiddenInputToken = _captchaProtectionProvider.Encrypt(cookieToken);
_captchaStorageProvider.Add(HttpContext, cookieToken, randomText);
return(Json(new
{
dntCaptchaImgUrl = captchaImageUrl,
dntCaptchaId = captchaDivId,
dntCaptchaTextValue = encryptedText,
dntCaptchaTokenValue = hiddenInputToken
}));
}
private void invalidateToken(DNTCaptchaTagHelperHtmlAttributes model)
{
_captchaStorageProvider.Remove(HttpContext, model.CaptchaToken);
}
