Rust:
使用基本认证发送 HTTP 请求

use reqwest;
use base64;
use std::error::Error;

#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
    // 用户名和密码
    let username = "user";
    let password = "pass";

    // 编码认证信息
    let auth = format!("{}:{}", username, password);
    let encoded_auth = format!("Basic {}", base64::encode(auth));

    // 创建请求客户端
    let client = reqwest::Client::new();

    // 发送带有基本认证的GET请求
    let response = client.get("http://example.com/resource")
        .header(reqwest::header::AUTHORIZATION, encoded_auth)
        .send()
        .await?;

    // 解析响应
    let status = response.status();
    let body = response.text().await?;

    println!("Status: {}", status);
    println!("Body:\n{}", body);

    Ok(())
}