Rust API Development: From Basics to Production

The book "API Development in Rust" is a practical guide to creating modern, fast, and secure web services in the Rust language. Unlike abstract textbooks, this book focuses on an end-to-end process: from the first line of code to deploying a finished API to a production environment.

Who is this book for? It is aimed at developers who already know the basics of Rust (variables, functions, ownership, borrowing) but want to learn how to apply them in web development. If you are transitioning from Python, Go, or Java to Rust and want to understand how to write reliable APIs without crashes and memory leaks, this is your choice.

What you will learn and master:

• Web application architecture in Rust: choosing between asynchronous and multithreaded approaches.
• Working with popular web frameworks: Actix-web, Axum, and Rocket. Comparison and selection based on the task.
• Designing RESTful endpoints, handling requests, and serializing data using Serde.
• Working with databases: SQLx for PostgreSQL, Diesel, and MongoDB driver. SQL and NoSQL.
• Asynchronous programming: Tokio, async/await, channels, and state management.
• Security: authentication (JWT, OAuth2), authorization, protection against CSRF and SQL injection.
• Testing: unit tests, integration tests, mock objects, and load testing.
• Logging, monitoring, and deployment: Docker, Kubernetes, CI/CD pipelines.

The book's structure follows the principle of "from simple to complex." The first chapters are dedicated to setting up the environment and creating a simple "Hello World" server. Then you gradually add routing, JSON handling, database connection, authentication, and finally deploy a full-fledged microservice. Each chapter contains practical code examples that can be run and modified immediately.

Why Rust for APIs? Rust provides memory control without a garbage collector, which is critical for high-load systems. The book shows how to use this power to create APIs that run faster, consume fewer resources, and practically never crash. You will learn how to avoid common beginner mistakes: thread blocking, connection leaks, and suboptimal serialization.

Outcome: after reading, you will be able to independently design, write, test, and deploy an API in Rust for a real project. The book will become a desktop reference for a backend developer using Rust in production.