Protecting Routes with Middleware | Node.js + Express JWT Guide
In this episode of the Tapovan Node.js Series, we go deep into one of the most important concepts in backend development — Middleware in Express.
We start from first principles.
Why are routes exposed by default?
What runs before a route handler?
How does Express control request flow?
You’ll learn:
• What app.use() really does
• How middleware runs before routes
• What next() actually means
• How to allow or block requests
• How to read the Authorization header
• How JWT verification works inside middleware
• How to attach req.user and pass context to route handlers
• How to properly protect routes like /resumes
This is not just about JWT.
It is about understanding execution control in Express.
Once you understand middleware clearly, authentication, logging, validation, rate limiting — everything becomes structured and clean.
In this video, we build a real checkAccess middleware that:
Intercepts incoming requests
Reads the Authorization header
Extracts and verifies the JWT
Attaches decoded user data to req.user
Allows the route to execute only if valid
By the end of this episode, your routes will no longer be open endpoints — they will be properly protected.
Topics Covered
Express Middleware fundamentals
app.use explained
Execution order in Express
next() control flow
Reading request headers
JWT verification using jsonwebtoken
Attaching properties to req object
Protecting routes in Node.js
If you are learning backend development, building APIs, or preparing for interviews — this episode will strengthen your mental model of how Express actually works.
This is Episode 8 of the Tapovan Node.js Series.
Learning here is calm, structured, and deeply intentional.
If you found this useful, consider subscribing to follow the full Node + JWT + Authentication journey.
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