Input Validation & Data Sanitization | Full Stack Development #40
Every request from a client is untrusted — and if you don't validate and sanitize it, that's where breaches start. In this video we lock down TaskFlow: validate every endpoint with Zod, defend against the big three attacks, and ship proper security headers. This completes the backend.
You'll learn:
Why validation matters, and why client-side checks are never enough
Zod: schemas, parse/safeParse, transforms, refinements, and inferred TypeScript types
The big three attacks: SQL injection, XSS, prototype pollution — and the fix for each
Helmet, Content Security Policy, and the OWASP Top 10
Locking down TaskFlow: a validate() middleware on every endpoint
Chapters:
0:00 - Intro
0:05 - Your API trusts its input. It shouldn't.
1:14 - Why Validation Matters
2:34 - Zod
3:56 - Sanitization: The Big Three
5:17 - Hardening the App
6:30 - Locking Down TaskFlow
7:47 - Recap & What's Next
Category: Full Stack Development
Video #40 in the Full Stack Development Series
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SimpleTech - What they didn't teach you in college
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