wangjia
99 lines
3.2 KiB
JavaScript
99 lines
3.2 KiB
JavaScript
#!/usr/bin/env node
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// dev-proxy.js — 本地开发反向代理
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// localhost:3000 → 营销站 :3001 / Flutter Web :8888
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// /app/* 路由到 Flutter，其余路由到 Eleventy
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// 自动把 Flutter index.html 里的 base href="/" 改写为 /app/，使静态资源请求正确走代理
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const http = require('http');
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const net = require('net');
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const PROXY_PORT = parseInt(process.env.PROXY_PORT || '3000', 10);
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const ELEVENTY_PORT = parseInt(process.env.ELEVENTY_PORT || '3001', 10);
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const FLUTTER_PORT = parseInt(process.env.FLUTTER_PORT || '9090', 10);
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const BACKEND_PORT = parseInt(process.env.BACKEND_PORT || '8080', 10);
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function isFlutter(url) {
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return url === '/app' || url.startsWith('/app/');
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}
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function isBackend(url) {
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return url.startsWith('/api/') || url === '/health' || url.startsWith('/images/');
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}
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function stripApp(url) {
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return url.slice(4) || '/';
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}
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function proxyHttp(req, res, port, path) {
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const opts = {
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hostname: 'localhost',
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port,
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path,
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method: req.method,
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headers: { ...req.headers, host: `localhost:${port}` },
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};
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const pr = http.request(opts, (upstream) => {
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const ct = upstream.headers['content-type'] || '';
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if (port === FLUTTER_PORT && ct.includes('text/html')) {
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let body = '';
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upstream.setEncoding('utf8');
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upstream.on('data', (c) => { body += c; });
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upstream.on('end', () => {
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// rewrite base href so Flutter asset requests stay under /app/
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body = body.replace(/(<base\s+href=")[^"]*(")/i, '$1/app/$2');
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const headers = { ...upstream.headers };
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headers['content-length'] = Buffer.byteLength(body);
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delete headers['transfer-encoding'];
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res.writeHead(upstream.statusCode, headers);
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res.end(body);
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});
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} else {
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res.writeHead(upstream.statusCode, upstream.headers);
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upstream.pipe(res, { end: true });
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}
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});
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pr.on('error', () => res.writeHead(502).end('upstream error'));
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req.pipe(pr, { end: true });
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}
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const server = http.createServer((req, res) => {
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if (isFlutter(req.url)) {
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proxyHttp(req, res, FLUTTER_PORT, stripApp(req.url));
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} else if (isBackend(req.url)) {
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proxyHttp(req, res, BACKEND_PORT, req.url);
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} else {
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proxyHttp(req, res, ELEVENTY_PORT, req.url);
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}
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});
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// WebSocket 透传（Eleventy 热重载 / Flutter DevTools）
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server.on('upgrade', (req, socket, head) => {
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const port = isFlutter(req.url) ? FLUTTER_PORT
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: isBackend(req.url) ? BACKEND_PORT
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: ELEVENTY_PORT;
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const path = isFlutter(req.url) ? stripApp(req.url) : req.url;
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const conn = net.createConnection(port, 'localhost', () => {
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conn.write(`${req.method} ${path} HTTP/1.1\r\n`);
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for (const [k, v] of Object.entries(req.headers)) {
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conn.write(`${k}: ${v}\r\n`);
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}
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conn.write('\r\n');
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if (head && head.length) conn.write(head);
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socket.pipe(conn);
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conn.pipe(socket);
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});
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conn.on('error', () => socket.destroy());
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socket.on('error', () => conn.destroy());
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});
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server.listen(PROXY_PORT, () => {
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console.log(`[proxy] http://localhost:${PROXY_PORT}`);
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console.log(` / → Eleventy :${ELEVENTY_PORT}`);
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console.log(` /app/ → Flutter Web :${FLUTTER_PORT}`);
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});
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