Prompt Engineering generative AI Model Chat GPT

 Effective ways to use Prompt Engineering generative AI model to solve and give you most accurate fact based information . The inputs to AI model is the key. Machine learning algorithm unleash the most significant information that is hidden unless you give a right quest to AI model to mine the right set of data.

• Creating effective prompt
• Evaluating prompt performance
• Using advanced prompt techniques

Tool required : Chat GPT and DALL-E-2 (Is a AI system that generates realistic images and arts from a descriptions in natural language.

What DALL E stands for

ChatGPT

"DALL-E" is a name that refers to a specific artificial intelligence model developed by OpenAI. The name itself doesn't have a literal meaning or stand for anything. It is named after the famous surrealist artist Salvador Dalí, combined with the name of the Pixar character WALL-E. DALL-E is known for its ability to generate creative and unique images based on textual descriptions

Azure B2C Open Id Cookie expiry results in redirect loop on login

Recently we have encountered some unusual behavior when customer tries to login using Azure B2C authentication framework.

Application Type	Web
Technology	.Net Framework 4.8 Asp.net MVC
CMS	Sitecore CMS 10.0.0
Authentication Framework	Azure B2C OAuth 2.0 Authorization Code Flow with Proof Key of code Exchange (PKCE) .Net MSAL Open Id connect

Problem Statement:

User idle for 15 mins and user taken back to Website Sign In page to initiate login again.

Root Cause: Token Exchange Failure. Nonce and Codeverifier expires after 15 mins. User Idle on sign In Page for more than 15mins and post that enters credential and results in login loop.

https://learn.microsoft.com/en-us/azure/active-directory-b2c/authorization-code-flow

Issue reported to Microsoft

Solution: Increase Nonce and Codeverifier expiry timeout.

	#region private methods
	private void RememberCodeVerifier(RedirectToIdentityProviderNotification<OpenIdConnectMessage, OpenIdConnectAuthenticationOptions> n, string codeVerifier)
	{
	var properties = new AuthenticationProperties();
	properties.Dictionary.Add("cv", codeVerifier);
	//if left blank or set to 0, the setting is not used. OOTB default is 15min
	if(ConfigurationManager.AppSettings[AzureB2CConstants.Keys.NonceLifetime] != null &&
	double.TryParse("30", out double lifetime) && lifetime > 0)
	{
	n.Options.ProtocolValidator.NonceLifetime = TimeSpan.FromMinutes(lifetime);
	}
	n.Options.CookieManager.AppendResponseCookie(
	n.OwinContext,
	GetCodeVerifierKey(n.ProtocolMessage.State),
	Convert.ToBase64String(Encoding.UTF8.GetBytes(n.Options.StateDataFormat.Protect(properties))),
	new CookieOptions
	{
	SameSite = SameSiteMode.None,
	HttpOnly = true,
	Secure = n.Request.IsSecure,
	Expires = DateTime.UtcNow + n.Options.ProtocolValidator.NonceLifetime
	});
	}
	private string GetCodeVerifierKey(string state)
	{
	using (var hash = SHA256.Create())
	{
	return OpenIdConnectAuthenticationDefaults.CookiePrefix + "cv." + Convert.ToBase64String(hash.ComputeHash(Encoding.UTF8.GetBytes(state)));
	}
	}
	private string RetrieveCodeVerifier(AuthorizationCodeReceivedNotification n)
	{
	string key = GetCodeVerifierKey(n.ProtocolMessage.State);
	string codeVerifierCookie = n.Options.CookieManager.GetRequestCookie(n.OwinContext, key);
	if (codeVerifierCookie != null)
	{
	var cookieOptions = new CookieOptions
	{
	SameSite = SameSiteMode.None,
	HttpOnly = true,
	Secure = n.Request.IsSecure
	};
	n.Options.CookieManager.DeleteCookie(n.OwinContext, key, cookieOptions);
	var cookieProperties = n.Options.StateDataFormat.Unprotect(Encoding.UTF8.GetString(Convert.FromBase64String(codeVerifierCookie)));
	cookieProperties.Dictionary.TryGetValue("cv", out var codeVerifier);
	return codeVerifier;
	}
	return string.Empty;
	}

view raw AzureB2c-CodeVerifier hosted with ❤ by GitHub

Why Sitecore XMCloud is fast to market?

 It would be really sad if Sitecore stop the innovation in Content as a service. This is one of the coolest product sitecore has ever produced. XMCloud is a fully managed self service to launch omnichannel content managed website and support deployment user interface without relying on any software to facilitate that.

XMCloud consists of

• Experience Manager
• Latest SXA
• Page Editor
• Headless service and cms
• Nextjs sdk etc
• One need not worry about version of sitecore which is managed completely by XMCloud services.