AXERA-TECH/lite_webui

1import { defineConfig } from 'vite';2import http from 'node:http';3import https from 'node:https';4 5/**6 * Dev-only CORS proxy middleware.7 * Browser fetches /lw-proxy/<path> with X-LW-Target header → Vite server forwards to target (no CORS).8 */9const lwProxyPlugin = {10  name: 'lw-proxy',11  configureServer(server) {12    server.middlewares.use('/lw-proxy', (req, res) => {13      const target = req.headers['x-lw-target'];14      if (!target) {15        res.writeHead(400, { 'Content-Type': 'application/json' });16        res.end(JSON.stringify({ error: 'Missing X-LW-Target header' }));17        return;18      }19 20      let targetUrl;21      try {22        // req.url is the path AFTER /lw-proxy (Connect strips the mount point)23        targetUrl = new URL(req.url ?? '/', target);24      } catch {25        res.writeHead(400, { 'Content-Type': 'application/json' });26        res.end(JSON.stringify({ error: 'Invalid target URL' }));27        return;28      }29 30      const httpModule = targetUrl.protocol === 'https:' ? https : http;31 32      // Forward headers, stripping browser/CORS-related ones33      const fwdHeaders = {};34      for (const [k, v] of Object.entries(req.headers)) {35        const kl = k.toLowerCase();36        if (kl === 'x-lw-target' || kl === 'host' || kl === 'origin' || kl === 'referer') continue;37        fwdHeaders[k] = v;38      }39      fwdHeaders['host'] = targetUrl.host;40 41      const options = {42        hostname: targetUrl.hostname,43        port: targetUrl.port || (targetUrl.protocol === 'https:' ? 443 : 80),44        path: targetUrl.pathname + (targetUrl.search || ''),45        method: req.method,46        headers: fwdHeaders,47      };48 49      const proxyReq = httpModule.request(options, (proxyRes) => {50        res.writeHead(proxyRes.statusCode ?? 200, proxyRes.headers);51        proxyRes.pipe(res); // stream response directly (supports SSE)52      });53 54      proxyReq.on('error', (err) => {55        if (!res.headersSent) {56          res.writeHead(502, { 'Content-Type': 'application/json' });57        }58        res.end(JSON.stringify({ error: err.message }));59      });60 61      req.pipe(proxyReq); // forward request body (needed for POST /v1/chat/completions)62    });63  },64};65 66export default defineConfig({67  plugins: [lwProxyPlugin],68  build: {69    target: 'esnext',70    minify: 'esbuild',71    chunkSizeWarningLimit: 600,72    rollupOptions: {73      output: {74        manualChunks(id) {75          if (id.includes('highlight.js')) return 'hljs';76          if (id.includes('marked')) return 'marked';77        },78      },79    },80  },81  test: {82    environment: 'jsdom',83    globals: true,84    setupFiles: ['./tests/setup.js'],85  },86});87