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:
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);
}
}