tokio/tokio-tls/examples/download-rust-lang.rs

extern crate futures;
extern crate native_tls;
extern crate tokio;
extern crate tokio_io;
extern crate tokio_tls;

use std::io;
use std::net::ToSocketAddrs;

use futures::Future;
use native_tls::TlsConnector;
use tokio::net::TcpStream;
use tokio::runtime::Runtime;

fn main() -> Result<(), Box<std::error::Error>> {
    let mut runtime = Runtime::new()?;
    let addr = "www.rust-lang.org:443".to_socket_addrs()?.next().ok_or("failed to resolve www.rust-lang.org")?;

    let socket = TcpStream::connect(&addr);
    let cx = TlsConnector::builder().build()?;
    let cx = tokio_tls::TlsConnector::from(cx);

    let tls_handshake = socket.and_then(move |socket| {
        cx.connect("www.rust-lang.org", socket).map_err(|e| {
            io::Error::new(io::ErrorKind::Other, e)
        })
    });
    let request = tls_handshake.and_then(|socket| {
        tokio_io::io::write_all(socket, "\
            GET / HTTP/1.0\r\n\
            Host: www.rust-lang.org\r\n\
            \r\n\
        ".as_bytes())
    });
    let response = request.and_then(|(socket, _)| {
        tokio_io::io::read_to_end(socket, Vec::new())
    });

    let (_, data) = runtime.block_on(response)?;
    println!("{}", String::from_utf8_lossy(&data));
    Ok(())
}