HTTP/HTTPS 代理配置

HTTP 代理是最常用的代理协议，工作原理：

1. 客户端将请求发送给代理服务器
2. 代理服务器转发请求到目标网站
3. 目标网站将响应返回给代理
4. 代理再将响应转发给客户端

import requests

# 单次请求使用代理
proxies = {
    'http': 'http://username:password@ip:port',
    'https': 'http://username:password@ip:port'
}
response = requests.get('https://example.com', proxies=proxies, timeout=10)

# 使用 Session 持久化代理设置
session = requests.Session()
session.proxies = proxies
response = session.get('https://example.com')

const axios = require('axios');
const { HttpsProxyAgent } = require('https-proxy-agent');

const proxyAgent = new HttpsProxyAgent('http://username:password@ip:port');

const response = await axios.get('https://example.com', {
  httpsAgent: proxyAgent,
  timeout: 10000
});

import java.net.*;
import java.io.*;

Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("IP", 端口));
URL url = new URL("https://example.com");
HttpURLConnection conn = (HttpURLConnection) url.openConnection(proxy);

// 设置认证
Authenticator.setDefault(new Authenticator() {
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication("用户名", "密码".toCharArray());
    }
});