原生nodejs写一个简单代理服务

joso

const http = require('http');
const https = require('https');

const PORT = process.env.PORT || 7000;

const getContentType = (headers) => {
  const contentType = headers['content-type'];
  return contentType || 'text/plain';
};

const handleRequest = (req, res) => {
  try {
    const reqUrl = new URL(req.url, `http://${req.headers.host}`); // 使用 `new URL()` 解析
    const path = reqUrl.pathname;

    if (path.startsWith('/')) {
      const githubUrl = `https://raw.githubusercontent.com${path}`;

      https.get(githubUrl, (githubRes) => {
        res.writeHead(githubRes.statusCode, {
          'Content-Type': getContentType(githubRes.headers),
          'Access-Control-Allow-Origin': '*', // 允许跨域访问，根据需要调整
          'Access-Control-Allow-Methods': 'GET', // 允许的请求方法，根据需要调整
        });

        githubRes.on('data', (chunk) => {
          res.write(chunk);
        });

        githubRes.on('end', () => {
          res.end();
        });
      }).on('error', (err) => {
        console.error(err);
        res.writeHead(500);
        res.end('Error fetching resource from GitHub.');
      });
    } else {
      res.writeHead(400);
      res.end('Invalid request.');
    }
  } catch (err) {
    console.error('Error parsing URL:', err);
    res.writeHead(400);
    res.end('Invalid URL.');
  }
};

const server = http.createServer(handleRequest);

server.listen(PORT, () => {
  console.log(`Server listening on port ${PORT}`);
});