const http = require('http');
const httpProxy = require('http-proxy');
const dotenv = require('dotenv')

const result = dotenv.config()

if (result.error) {
  throw result.error
}

const { PORT, TARGET } = result.parsed

console.log(`proxy target: ${TARGET}`)

// 创建一个代理服务器实例，并配置目标服务器的地址
const proxy = httpProxy.createProxyServer({
  target: TARGET,
  changeOrigin:true
});

// 创建一个 HTTP 服务器，并在请求到达时触发代理服务器的转发
const server = http.createServer((req, res) => {
  proxy.web(req, res);
});

const port = PORT || 3000;

server.listen(port, () => {
  console.log(`Proxy server is running on port ${port}`);
});