ntex provides a strongly typed component for building asynchronous network applications. It includes HTTP/1, HTTP/2, WebSocket, TLS, and runtime-independent I/O support. MQTT, AMQP, and gRPC are provided by related projects.

Build status

Platform	Status
Linux
macOS
Windows

Usage

Add ntex to your project:

[dependencies]
ntex = "4"

A minimal web server looks like this:

use ntex::{SharedCfg, web};

#[web::get("/")]
async fn index() -> &'static str {
    "Hello world!"
}

#[ntex::main]
async fn main() -> std::io::Result<()> {
    web::HttpServer::new(async |_| web::App::new().service(index))
        .bind("127.0.0.1:8080", SharedCfg::new("hello-world"))?
        .run()
        .await
}

Runtime selection

Without an explicit runtime feature, ntex uses its native single-threaded runtime and automatically selects a platform I/O reactor:

• Linux tries io_uring and falls back to polling.
• Other Unix platforms use polling.
• Windows uses IOCP.

Alternative runtimes and native reactors can be selected with Cargo features:

Feature	Runtime or reactor
tokio	Tokio local runtime and I/O driver
compio	Compio runtime and completion-based I/O
neon-polling	Native runtime with the polling reactor on Unix
neon-uring	Native runtime with io_uring on Linux

Enable at most one runtime or native-reactor selection feature. For example:

[dependencies]
ntex = { version = "4", features = ["tokio"] }

Optional features

• openssl and rustls enable the corresponding TLS integrations.
• compress enables HTTP content compression (gzip, deflate and zstd).
• cookie enables cookie support.
• ws enables WebSocket APIs and is enabled by default.

Related projects

Project	Description
ntex-mqtt	Client and server framework for MQTT v5 and v3.1.1
ntex-amqp	Client and server framework for AMQP 1.0
ntex-grpc	Client and server framework for gRPC

Documentation and community

• Framework guide
• Web framework documentation
• API documentation
• LLM guide (full text)
• Examples
• Release changes
• Migrating from ntex 3 to ntex 4
• Minimum supported Rust version: 1.97

License

This project is licensed under either of:

• Apache License, Version 2.0 (LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or https://opensource.org/licenses/MIT)