62 lines
1.7 KiB
JavaScript
62 lines
1.7 KiB
JavaScript
import express from 'express';
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import fetch from 'node-fetch';
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import { URL } from 'url';
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const app = express();
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const port = 3000;
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// 允许跨域请求
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app.use((req, res, next) => {
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res.header('Access-Control-Allow-Origin', '*');
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next();
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});
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// 通用代理路由
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app.get('/proxy', async (req, res) => {
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console.log('Received Range header:', req.headers.range);
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// 获取目标 URL
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const targetUrl = req.query.url;
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console.log('Fetching data from:', targetUrl);
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if (!targetUrl) {
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return res.status(400).send('URL parameter is required');
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}
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try {
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// 设置请求头
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const headers = {};
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if (req.headers.range) {
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headers['Range'] = req.headers.range; // 转发 Range 请求头
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}
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// 向目标 URL 发起请求
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const response = await fetch(targetUrl, { headers });
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// 设置响应头
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response.headers.forEach((value, key) => {
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if (key !== 'content-encoding') { // 避免某些头信息导致问题
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res.setHeader(key, value);
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}
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});
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// 特殊处理 Transfer-Encoding 和 Content-Length
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if (response.headers.get('transfer-encoding') === 'chunked') {
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res.removeHeader('Content-Length');
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}
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// 将响应体直接流式传输给客户端
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response.body.pipe(res, { end: true });
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// 错误处理
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response.body.on('error', (err) => {
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console.error('Error during data transfer:', err);
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res.status(500).send('Error during data transfer');
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});
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} catch (error) {
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console.error('Error fetching data:', error);
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res.status(500).send('Error fetching data');
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}
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});
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app.listen(port, () => {
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console.log(`Proxy server running at http://localhost:${port}`);
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}); |