New upstream version 1.63.0+dfsg1

[rustc.git] / src / doc / book / listings / ch20-web-server / listing-20-10 / src / main.rs

// ANCHOR: here
use std::{
    fs,
    io::{prelude::*, BufReader},
    net::{TcpListener, TcpStream},
    thread,
    time::Duration,
};
// --snip--
// ANCHOR_END: here

fn main() {
    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();

    for stream in listener.incoming() {
        let stream = stream.unwrap();

        handle_connection(stream);
    }
}
// ANCHOR: here

fn handle_connection(mut stream: TcpStream) {
    // --snip--

    // ANCHOR_END: here
    let buf_reader = BufReader::new(&mut stream);
    let request_line = buf_reader.lines().next().unwrap().unwrap();

    // ANCHOR: here
    let (status_line, filename) = match &request_line[..] {
        "GET / HTTP/1.1" => ("HTTP/1.1 200 OK", "hello.html"),
        "GET /sleep HTTP/1.1" => {
            thread::sleep(Duration::from_secs(5));
            ("HTTP/1.1 200 OK", "hello.html")
        }
        _ => ("HTTP/1.1 404 NOT FOUND", "404.html"),
    };

    // --snip--
    // ANCHOR_END: here

    let contents = fs::read_to_string(filename).unwrap();
    let length = contents.len();

    let response =
        format!("{status_line}\r\nContent-Length: {length}\r\n\r\n{contents}");

    stream.write_all(response.as_bytes()).unwrap();
    // ANCHOR: here
}
// ANCHOR_END: here