/// <summary>
/// Generates a CSP nonce HTML attribute. The 120-bit random nonce will be included in the CSP style-src directive.
/// </summary>
/// <param name="helper"></param>
public static IHtmlString CspStyleNonce(this HtmlHelper helper)
{
var context = new HttpContextWrapper(helper.ViewContext.HttpContext);
var cspConfigurationOverrideHelper = new CspConfigurationOverrideHelper();
var headerOverrideHelper = new HeaderOverrideHelper(new CspReportHelper());
var nonce = cspConfigurationOverrideHelper.GetCspStyleNonce(context);
if (context.GetItem <string>("NWebsecStyleNonceSet") == null)
{
context.SetItem("NWebsecStyleNonceSet", "set");
headerOverrideHelper.SetCspHeaders(context, false);
headerOverrideHelper.SetCspHeaders(context, true);
}
return(CreateNonceAttribute(helper, nonce));
}
public void GetItem_NoItem_ReturnsNull()
{
Assert.Null(_contextWrapper.GetItem <string>("unexistingitem"));
}
