src/doc/book/listings/ch20-web-server/listing-20-11/src/main.rs

   1 use std::fs;
   2 use std::io::prelude::*;
   3 use std::net::TcpListener;
   4 use std::net::TcpStream;
   5 use std::thread;
   6 use std::time::Duration;
   7
   8 // ANCHOR: here
   9 fn main() {
  10     let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
  11
  12     for stream in listener.incoming() {
  13         let stream = stream.unwrap();
  14
  15         thread::spawn(|| {
  16             handle_connection(stream);
  17         });
  18     }
  19 }
  20 // ANCHOR_END: here
  21
  22 fn handle_connection(mut stream: TcpStream) {
  23     let mut buffer = [0; 1024];
  24     stream.read(&mut buffer).unwrap();
  25
  26     let get = b"GET / HTTP/1.1\r\n";
  27     let sleep = b"GET /sleep HTTP/1.1\r\n";
  28
  29     let (status_line, filename) = if buffer.starts_with(get) {
  30         ("HTTP/1.1 200 OK", "hello.html")
  31     } else if buffer.starts_with(sleep) {
  32         thread::sleep(Duration::from_secs(5));
  33         ("HTTP/1.1 200 OK", "hello.html")
  34     } else {
  35         ("HTTP/1.1 404 NOT FOUND", "404.html")
  36     };
  37
  38     let contents = fs::read_to_string(filename).unwrap();
  39
  40     let response = format!(
  41         "{}\r\nContent-Length: {}\r\n\r\n{}",
  42         status_line,
  43         contents.len(),
  44         contents
  45     );
  46
  47     stream.write(response.as_bytes()).unwrap();
  48     stream.flush().unwrap();
  49 }