[TOC] ### cargo創建一個tokio項目 ``` $ cargo new tokio_test $ cd tokio_test //接下來，在`Cargo.toml`以下位置添加必要的依賴項： [dependencies] tokio = "0.1" ``` 在文件 src/main.rs ``` extern crate tokio; use tokio::io; use tokio::net::TcpStream; use tokio::prelude::; ``` 寫一個客戶端程序 ``` fn main() { let addr = "192.168.1.2:7878".parse().unwrap(); let _client = TcpStream::connect(&addr).and_then(|_stream| { println!("create stream"); io::write_all(_stream, "hello world\n").then(|_result| { println!("wrote to _stream, success = {:?}", _result.is_ok()); Ok(()) }) }).map_err(|err| { println!("connect error={:?}", err); }); println!("About to create the stream and write to it..."); tokio::run(_client); println!("Stream has been created and written to."); } ``` ### 運行客戶端 #### netcat `netcat`是一種從命令行快速創建TCP套接字的工具。以下命令在先前指定的端口上啟動偵聽TCP套接字。 安裝 ``` $ yum install -y nc ``` 偵聽 ``` $ nc -l -p 6142 ``` #### 運行客戶端 ``` $ cargo run ``` 如果一切順利，你應該看到`hello world`從Netcat打印出來