五.数据请求

use std::result;

use async_std::{
    io::{ReadExt, WriteExt},
    net,
};
#[async_std::main]
async fn main() {
    async fn request(host: &str, port: u16, path: &str) -> std::io::Result<String> {
        let mut socket = net::TcpStream::connect((host, port)).await?;
        let request = format!("GET {} HTTP/1.1\r\nHost: {}\r\n\r\n", path, host);

        socket.write_all(request.as_bytes()).await?;
        socket.shutdown(net::Shutdown::Write)?;

        let mut response = String::new();
        socket.read_to_string(&mut response).await?;
        Ok(response)
    }
    let result = request("127.0.0.1", 8000, "/Cargo.toml").await;
    match result {
        Ok(content) => println!("response content = \n{}", content),
        Err(e) => println!("error occured:{:?}", e),
    }
}