Chapter 45: OpenAPI and Swagger in C++

Auto-generated API documentation. In this chapter, you will learn openapi and swagger in depth with C++ code examples, explanations, and best practices.

Overview

This chapter covers openapi and swagger for Kungfu.js developers using C++. We will start with the basics, move through practical examples, and end with advanced techniques and common pitfalls.

Why This Matters

Understanding openapi and swagger is essential because it is a core part of building web applications. Every real-world app needs to handle auto-generated api documentation. Skipping this chapter would leave a gap in your knowledge that would cause problems later.

Code Example

Kungfu.js automatically generates OpenAPI 3.1 documentation from your routes. No annotations needed.

Visit /openapi.json for the raw spec, or /docs for the Swagger UI.

Common Mistakes

• Not reading the documentation: Always check the API reference when something does not work as expected.
• Skipping security: Never disable the default middleware unless you have a very good reason. Security is not optional.
• Not testing: Write tests for your handlers. Kungfu.js makes this easy with the built-in test utilities.

Summary

In this chapter, you learned about openapi and swagger in C++. You saw code examples, understood how things work under the hood, and learned about common mistakes to avoid.

What is Next?

In chapter 46, we will cover Error Handling: Unified error format with code, message, detail.