blob: 398ec11aac705921f8f0e9220339ebe56cafefce (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
//! Hello world server.
//!
//! A simple server that accepts connections, writes "hello world\n", and closes
//! the connection.
//!
//! You can test this out by running:
//!
//! cargo run --example hello_world
//!
//! And then in another terminal run:
//!
//! telnet localhost 6142
//!
#![deny(warnings)]
extern crate tokio;
use tokio::io;
use tokio::net::TcpListener;
use tokio::prelude::*;
pub fn main() {
let addr = "127.0.0.1:6142".parse().unwrap();
// Bind a TCP listener to the socket address.
//
// Note that this is the Tokio TcpListener, which is fully async.
let listener = TcpListener::bind(&addr).unwrap();
// The server task asynchronously iterates over and processes each
// incoming connection.
let server = listener.incoming().for_each(|socket| {
println!("accepted socket; addr={:?}", socket.peer_addr().unwrap());
let connection = io::write_all(socket, "hello world\n")
.then(|res| {
println!("wrote message; success={:?}", res.is_ok());
Ok(())
});
// Spawn a new task that processes the socket:
tokio::spawn(connection);
Ok(())
})
.map_err(|err| {
// All tasks must have an `Error` type of `()`. This forces error
// handling and helps avoid silencing failures.
//
// In our example, we are only going to log the error to STDOUT.
println!("accept error = {:?}", err);
});
println!("server running on localhost:6142");
// Start the Tokio runtime.
//
// The Tokio is a pre-configured "out of the box" runtime for building
// asynchronous applications. It includes both a reactor and a task
// scheduler. This means applications are multithreaded by default.
//
// This function blocks until the runtime reaches an idle state. Idle is
// defined as all spawned tasks have completed and all I/O resources (TCP
// sockets in our case) have been dropped.
//
// In our example, we have not defined a shutdown strategy, so this will
// block until `ctrl-c` is pressed at the terminal.
tokio::run(server);
}
|
