如何在Rust中将HTTP proxy与异步Hyper 0.11一起使用？

[dependencies]
hyper = "0.11"
hyper-tls = "0.3"
tokio = { version = "1", features = ["full"] }

use hyper::client::HttpConnector;
use hyper::Client;
use hyper_tls::HttpsConnector;
use std::env;
use std::error::Error;
use std::io::{self, Write};
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use tokio::net::TcpStream;
use tokio::runtime::Runtime;

#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
    // 获取代理服务器的地址和端口
    let proxy_host = env::var("HTTP_PROXY_HOST")?;
    let proxy_port = env::var("HTTP_PROXY_PORT")?.parse::<u16>()?;

    // 创建一个HTTP代理连接器
    let proxy = format!("http://{}:{}", proxy_host, proxy_port);
    let proxy_uri = proxy.parse()?;
    let proxy_connector = HttpConnector::new();
    let proxy_connector = hyper_proxy::ProxyConnector::from_proxy(proxy_connector, proxy_uri)?;

    // 创建一个异步Hyper客户端
    let https_connector = HttpsConnector::new();
    let client = Client::builder().build::<_, hyper::Body>(proxy_connector);

    // 发起一个HTTP请求
    let uri = "http://example.com".parse()?;
    let mut response = client.get(uri).await?;

    // 读取并打印响应内容
    let mut body = Vec::new();
    while let Some(chunk) = response.body_mut().data().await {
        let chunk = chunk?;
        io::stdout().write_all(&chunk)?;
        body.extend_from_slice(&chunk);
    }

    Ok(())
}

cargo build
cargo run