Web Backends

The mental model behind Rust web backends: an async runtime driving a router built from extractors, with Tower's Service/Layer trait pattern composing middleware by nesting rather than by callback chain.

Learn to build web backends with Rust using Axum and Tokio. Explore 11 examples, from a basic "Hello World" server to JSON responses.

Define HTTP routes, bind handlers to methods, and return typed responses with Axum 0.8. Learn explicit HTTP method routing with typed request and response bodies.

Learn how Axum handlers use extractors like State, Json, Path, and Query to access request data and shared application state.

Map domain failures to consistent HTTP responses in Axum handlers. Learn to use IntoResponse, thiserror, and ? for robust error handling.

Validate HTTP request inputs in Rust with serde and the validator crate. Learn to implement robust data checks for web backends.

Implement real-time features using WebSockets for bidirectional chat or Server-Sent Events for one-way data streams to push live updates to clients.

Explore Actix-web, a high-performance Rust HTTP framework. Learn when to choose it and see practical examples for building web services.

Test Axum handlers without binding ports. Learn to use tower::ServiceExt::oneshot and in-memory state fixtures for fast, reliable integration tests.

Learn best practices for building maintainable, secure, and fast Rust HTTP services. Covers project structure, error handling, and data access.

A single-page roundup of every highlight bullet from the 12 pages in the Web Backends section, grouped by source page so you can scan all 70 takeaways without opening each article individually.