Secure User Authentication and Personalized Welcome with OAuth 2.0 and PKCE
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Automate secure user authentication and deliver personalized experiences. This workflow leverages OAuth 2.0 with PKCE to manage user logins and retrieve user information, enabling dynamic content delivery for a tailored welcome experience.
About This Workflow
This n8n workflow orchestrates a secure user authentication process using OAuth 2.0 and the Proof Key for Code Exchange (PKCE) flow. It begins by listening for incoming webhook requests, then processes incoming cookies to potentially extract an access token. If a token is present, it makes an authenticated API call to fetch user information. Based on the success of retrieving user data, it either renders a personalized welcome page or presents a login form, ensuring a dynamic and secure user interaction. The workflow is designed to handle both authenticated and unauthenticated users seamlessly, providing a robust solution for web application backends.
Key Features
- Secure OAuth 2.0 Authentication: Implements a robust OAuth 2.0 flow with PKCE for secure authorization.
- Webhook Trigger: Initiates workflows automatically via incoming webhook requests.
- Dynamic User Information Retrieval: Fetches user details based on an access token for personalized content.
- Conditional Logic: Branches workflows based on the presence of tokens and the validity of user data.
- Automated Response Generation: Serves either a personalized welcome page or a login form dynamically.
How To Use
- Configure Webhook Node: Set up the 'Webhook' node to listen for incoming requests on a specific path.
- Process Cookies: Use the 'Code' node to parse cookies from the incoming request, looking for an access token.
- Conditional Token Check: Employ the 'IF token is present' node to determine if an access token was found.
- Fetch User Info: If a token exists, use the 'HTTP Request' node to call the userinfo endpoint, including the access token in the Authorization header.
- Validate User Data: Use the 'IF user info ok' node to check if essential user information (like email) was successfully retrieved.
- Render Welcome Page: If user info is valid, utilize the 'Welcome page' HTML node to create a personalized welcome message using user data.
- Send Welcome Response: The 'send back welcome page' node responds to the webhook with the generated welcome page.
- Render Login Form: If no token is present or user info is invalid, the 'login form' HTML node presents the OAuth 2.0/PKCE login flow.
- Send Login Response: The 'send back login page' node responds to the webhook with the login form, initiating the authentication process.
Apps Used
Workflow JSON
{
"id": "b6650ff1-40a9-4d10-bdda-64ff4cc70d5c",
"name": "Secure User Authentication and Personalized Welcome with OAuth 2.0 and PKCE",
"nodes": 8,
"category": "DevOps",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
Get This Workflow
ID: b6650ff1-40a9...
About the Author
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