Backend-III: Master Redis Caching | Build Secure Logout Route

Leetcode Clone Lecture-5: Redis Cache Implementation. In this Crucial Backend Development Tutorial, We are Building a Secure and Efficient Logout Route using Redis for Token Blacklisting. This is a Production-Level Technique Used to Instantly Invalidate a JSON Web Token (JWT) When a User Logs Out, Enhancing the Security of Our Node.js application.

Backend-lll : Secure Logout Route | MERN, Redis, RedisInsight & JWT


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What You will Learn in this Comprehensive Step-By-Step Video:



Creating a Robust Logout Function: See Exactly How to Structure the Backend Logic for Instant Token Invalidation.

Redis Cloud Setup: Follow a Step-By-Step Guide on How to Set Up a Free Redis Cloud Database and Connect to it.

Connecting Redis & MongoDB Concurrently: Learn How to Establish Simultaneous Connections to Both Our NoSQL (MongoDB) and In-Memory (Redis) Databases in a Node.js Environment.

Implementing User Middleware: Understand How to Verify the User and Extract Necessary Information from the Token before Logging Out.

Production Level Debugging: Watch as We tackle and fix Common API Bugs and Errors Live, including "Error: JWT must be a String" and "Cast to ObjectId failed," Demonstrating Real-World Debugging Techniques.

Verifying Logout Security: Use Postman to Test the API and Redis Insight to Check the TTL (Time-to-Live) of the Blacklisted Token, Confirming the Session is Properly Terminated and Cookies are Cleared.



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By the End of this Video, You will have a Fully Working, Secure Logout Mechanism Essential for any Modern Application. Don't forget to Hit LIKE and SUBSCRIBE for More Advanced Backend Tutorials!




Don't Just Code— Build a Scalable System! 👇



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⏱️ Video Roadmap & Timestamps:


00:00 Welcome to My Channel
00:08 Intro: Lecture-5 Logout Route (Using Redis)
00:40 Start Backend-lll Creating Logout Route
02:20 Creating Logout Function
05:25 Setup Redis Cloud Step-By-Step
06:25 How to Create Database in Redis Cloud for Free
07:35 Download & Connect Redis Database using Redis Insight
08:25 Exploring Redis Insight
09:00 Checking Redis Connection using PING PONG
10:05 How to Connect Redis Database using Redis Client for Node.js
12:10 npm i redis
16:30 Securing our Password using Environmental Variable
22:50 Connecting to Redis Database and MongoDB Database Concurrently
29:20 Calling establishConnection() Function
35:00 Fixing TyperError: create client is not a function
33:25 Creating userMiddleware
53:15 Finishing Our Logout Function
01:03:53 Checking MongoDB Database
01:04:01 Checking Logout API using Postman
01:06:13 Fixing API Bugs & Errors
01:08:46 Production Level Debugging
01:08:50 Error: JWT must be a String
01:10:24 Importance of Destructructing
01:08:50 Error: Cast to ObjectId failed to value
01:15:00 localhost:3000/user/logout Working Fine
01:15:25 After Logout Cookies is also Cleared inside Client Web Browser
01:16:18 Checking Data is Stored in Our Radis Database or not using Redis Insight
01:18:30 Checking TTL (Time-to-Live) inside redis insight
01:19:20 Have Questions? Drop them in the Comments Below!
01:19:25 Thanks For Watching...


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🛠️ Full Project Tech Stack:


Core MERN: MongoDB, Express.js, React, Node.js, Mongoose

Frontend/UI: React, Redux, Tailwind CSS, Vite, Axios, Monaco Code-Editor

Auth/Security: JWT Auth, Bcrypt.js, HTTP-Only Cookies

Advanced Features: Judge0 API, Redis Queue, Google GEMINI AI (LLM), Razorpay/Stripe Payments, Cloudinary

DevOps/Deployment: Git & GitHub, CI/CD (GitHub Actions), Docker, AWS Cloud, Vercel-Heroku/Render


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🔗 Project References & Links:


MongoDB: https://www.mongodb.com/

Express: https://expressjs.com/

Nodejs: https://nodejs.org/en

Postman: https://www.postman.com/


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Made With ❤️ (:

Thank You For Watching 👀





#MERN #RedisCache #RedisInsight #Caching #redisClient #redisLogout #JWTBlacklisting #JWT #BackendDevelopment #RedisCloud #WebDevelopment #Logout #TTL #Cookies #Debugging