async-std/examples/socket-timeouts.rs

//! Prints response of GET request made to TCP server with 5 second socket timeout

use std::time::Duration;

use async_std::{io, net::TcpStream, prelude::*, task};

async fn get() -> io::Result<Vec<u8>> {
    let mut stream = TcpStream::connect("example.com:80").await?;
    stream
        .write_all(b"GET /index.html HTTP/1.0\r\n\r\n")
        .await?;

    let mut buf = vec![];

    io::timeout(Duration::from_secs(5), async move {
        stream.read_to_end(&mut buf).await?;
        Ok(buf)
    })
    .await
}

fn main() {
    task::block_on(async {
        let raw_response = get().await.expect("request");
        let response = String::from_utf8(raw_response).expect("utf8 conversion");
        println!("received: {}", response);
    });
}