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CodeSignal

Building Robust and Modular APIs

via CodeSignal

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Overview

Take your API to the next level by making it more robust and maintainable. You'll learn to validate incoming data, create centralized error responses and success messages, and use middleware to log requests in a structured and insightful way. You'll also refactor core logic into reusable service modules—key skills for building professional-grade applications.

Syllabus

  • Unit 1: Validating Incoming Data
    • Get Ready to Validate: Explore the Validation Flow
    • Level Up Your Validation: Smarter Rules for Better Data
    • Secure & Strict: Guarding Your API Like a Pro
    • Apply Your Defenses: Validate Before You Trust
  • Unit 2: Centralizing Error Responses
    • Error Reporting With Insight
    • Introducing Error Codes with Enums
    • Capture the Full Context: Add Request Method & Path to Errors
    • Centralizing Error and Success Responses in Next.js APIs
  • Unit 3: Logging API Requests
    • Logging API Requests with Middleware
    • Add Logging Middleware for API Requests
    • Logging API Requests with Middleware
  • Unit 4: Structuring Business Logic
    • Structuring and Reusing Business Logic Example
    • Structuring and Reusing Business Logic in a Service Layer
    • Complete the User Service

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