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Actix-web (Rust)

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description Actix-web (Rust) Overview

Actix-web is an open-source web framework for the Rust programming language, designed for building fast, asynchronous backend services. While it was originally built on top of the Actix actor framework, its modern implementation relies directly on the Tokio asynchronous runtime. The framework provides developers with robust typing, HTTP/2 support, and efficient routing capabilities. It is intended for developers who require reliable concurrency and high throughput for web applications.

help Actix-web (Rust) FAQ

Does Actix-web require applications to use actors directly?

No. Although Actix-web grew from the Actix ecosystem, normal request handlers, extractors, middleware, and application state do not require developers to model the application as actors.

Which asynchronous runtime does Actix-web use?

Actix-web runs on the Tokio ecosystem through its Actix runtime integration. This allows handlers to use Rust futures and common asynchronous libraries for database, network, and file operations.

Can Actix-web serve HTTP/2 and WebSocket connections?

Yes. Actix-web supports WebSockets and can negotiate HTTP/2 when configured with an appropriate TLS stack, while lower-level `actix-http` builders also support prior-knowledge HTTP/2.

When would Axum be chosen instead of Actix-web?

Axum fits teams that want especially direct integration with Tokio, Tower middleware, and the broader Hyper ecosystem. Actix-web offers its own mature extractor and service architecture and is frequently selected when throughput and a batteries-included web framework are priorities.

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