Rust 一个简单的TCP客户端和服务器应用程序：echo
示例
以下代码基于std::net::TcpListener上的文档提供的示例。该服务器应用程序将侦听传入的请求并发送回所有传入的数据，从而充当“回显”服务器。客户端应用程序将发送一条小消息，并期望包含相同内容的答复。
服务器：
use std::thread;
use std::net::{TcpListener, TcpStream, Shutdown};
use std::io::{Read, Write};
fn handle_client(mut stream: TcpStream) {
let mut data = [0 as u8; 50]; //使用50字节缓冲区
while match stream.read(&mut data) {
Ok(size) => {
//呼应一切！
stream.write(&data[0..size]).unwrap();
true
},
Err(_) => {
println!("An error occurred, terminating connection with {}", stream.peer_addr().unwrap());
stream.shutdown(Shutdown::Both).unwrap();
false
}
} {}
}
fn main() {
let listener = TcpListener::bind("0.0.0.0:3333").unwrap();
//接受连接并处理它们，为每个连接产生一个新线程
println!("Server listening on port 3333");
for stream in listener.incoming() {
match stream {
Ok(stream) => {
println!("New connection: {}", stream.peer_addr().unwrap());
thread::spawn(move|| {
//连接成功
handle_client(stream)
});
}
Err(e) => {
println!("Error: {}", e);
/* connection failed */
}
}
}
//关闭套接字服务器
drop(listener);
}客户：
use std::net::{TcpStream};
use std::io::{Read, Write};
use std::str::from_utf8;
fn main() {
match TcpStream::connect("localhost:3333") {
Ok(mut stream) => {
println!("Successfully connected to server in port 3333");
let msg = b"Hello!";
stream.write(msg).unwrap();
println!("Sent Hello, awaiting reply...");
let mut data = [0 as u8; 6]; //使用6字节缓冲区
match stream.read_exact(&mut data) {
Ok(_) => {
if &data == msg {
println!("可以回复！");
} else {
let text = from_utf8(&data).unwrap();
println!("Unexpected reply: {}", text);
}
},
Err(e) => {
println!("Failed to receive data: {}", e);
}
}
},
Err(e) => {
println!("Failed to connect: {}", e);
}
}
println!("Terminated.");
}