hyper

Module server

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Expand description

HTTP Server

A Server is created to listen on a port, parse HTTP requests, and hand them off to a Service.

There are two levels of APIs provide for constructing HTTP servers:

  • The higher-level Server type.
  • The lower-level conn module.

§Server

The Server is main way to start listening for HTTP requests. It wraps a listener with a MakeService, and then should be executed to start serving requests.

Server accepts connections in both HTTP1 and HTTP2 by default.

§Examples

use std::convert::Infallible;
use std::net::SocketAddr;
use hyper::{Body, Request, Response, Server};
use hyper::service::{make_service_fn, service_fn};

async fn handle(_req: Request<Body>) -> Result<Response<Body>, Infallible> {
    Ok(Response::new(Body::from("Hello World")))
}

#[tokio::main]
async fn main() {
    // Construct our SocketAddr to listen on...
    let addr = SocketAddr::from(([127, 0, 0, 1], 3000));

    // And a MakeService to handle each connection...
    let make_service = make_service_fn(|_conn| async {
        Ok::<_, Infallible>(service_fn(handle))
    });

    // Then bind and serve...
    let server = Server::bind(&addr).serve(make_service);

    // And run forever...
    if let Err(e) = server.await {
        eprintln!("server error: {}", e);
    }
}

If you don’t need the connection and your service implements Clone you can use tower::make::Shared instead of make_service_fn which is a bit simpler:

#[tokio::main]
async fn main() {
    // Construct our SocketAddr to listen on...
    let addr = SocketAddr::from(([127, 0, 0, 1], 3000));

    // Shared is a MakeService that produces services by cloning an inner service...
    let make_service = Shared::new(service_fn(handle));

    // Then bind and serve...
    let server = Server::bind(&addr).serve(make_service);

    // And run forever...
    if let Err(e) = server.await {
        eprintln!("server error: {}", e);
    }
}

Passing data to your request handler can be done like so:

use std::convert::Infallible;
use std::net::SocketAddr;
use hyper::{Body, Request, Response, Server};
use hyper::service::{make_service_fn, service_fn};
use hyper::server::conn::AddrStream;

#[derive(Clone)]
struct AppContext {
    // Whatever data your application needs can go here
}

async fn handle(
    context: AppContext,
    addr: SocketAddr,
    req: Request<Body>
) -> Result<Response<Body>, Infallible> {
    Ok(Response::new(Body::from("Hello World")))
}

#[tokio::main]
async fn main() {
    let context = AppContext {
        // ...
    };

    // A `MakeService` that produces a `Service` to handle each connection.
    let make_service = make_service_fn(move |conn: &AddrStream| {
        // We have to clone the context to share it with each invocation of
        // `make_service`. If your data doesn't implement `Clone` consider using
        // an `std::sync::Arc`.
        let context = context.clone();

        // You can grab the address of the incoming connection like so.
        let addr = conn.remote_addr();

        // Create a `Service` for responding to the request.
        let service = service_fn(move |req| {
            handle(context.clone(), addr, req)
        });

        // Return the service to hyper.
        async move { Ok::<_, Infallible>(service) }
    });

    // Run the server like above...
    let addr = SocketAddr::from(([127, 0, 0, 1], 3000));

    let server = Server::bind(&addr).serve(make_service);

    if let Err(e) = server.await {
        eprintln!("server error: {}", e);
    }
}

Modules§

  • accept
    The Accept trait and supporting types.
  • conn
    Lower-level Server connection API.

Structs§

  • Builder
    A builder for a Server.
  • Server
    A listening HTTP server that accepts connections in both HTTP1 and HTTP2 by default.