Initial commit step0

2026-06-12 18:48:27 +02:00
commit 7093fb49a0
11 changed files with 330 additions and 0 deletions
--- a/step0/server.js
+++ b/step0/server.js
@@ -0,0 +1,133 @@
+// ===== Configuration =====
+var config = {
+  port: 8080,
+};
+//
+// =========================
+let rootDir = __dirname;
+if (!rootDir.endsWith('/')) rootDir += '/';
+const binDir = rootDir + `build`;
+const watchPaths = [rootDir, binDir];
+
+const http = require('http');
+const fs = require('fs');
+const path = require('path');
+const { exec } = require('child_process');
+const WebSocket = require('ws');
+
+const mimeTypes = {
+  '.html': 'text/html',
+  '.js': 'text/javascript',
+  '.wasm': 'application/wasm',
+  '.css': 'text/css',
+  '.json': 'application/json'
+};
+
+const server = http.createServer((req, res) => {
+  let norm = path.normalize(req.url);
+  console.log(`${req.method} ${norm}`);
+
+  // Serve config endpoint
+  if (norm === '/config') {
+    res.writeHead(200, { 'Content-Type': 'application/json' });
+    res.end(JSON.stringify(config));
+    return;
+  }
+
+  // Serve files
+  let filePath;
+  if (norm.startsWith('/bin/')) {
+    filePath = path.join(binDir, norm.slice(5));
+  } else if (norm == '/') {
+    filePath = rootDir + 'index.html';
+  } else {
+    filePath = rootDir + norm;
+  }
+
+  const extname = String(path.extname(filePath)).toLowerCase();
+  const contentType = mimeTypes[extname] || 'application/octet-stream';
+
+  fs.readFile(filePath, (error, content) => {
+    if (error) {
+      if (error.code === 'ENOENT') {
+        res.writeHead(404, { 'Content-Type': 'text/html' });
+        res.end('<h1>404 - File Not Found</h1>', 'utf-8');
+      } else {
+        res.writeHead(500);
+        res.end(`Server Error: ${error.code}`, 'utf-8');
+      }
+    } else {
+      res.writeHead(200, {
+        'Content-Type': contentType,
+        'Content-Length': content.byteLength,
+        'Access-Control-Expose-Headers': 'Content-Length',
+        'Cross-Origin-Opener-Policy': 'same-origin',
+        'Cross-Origin-Embedder-Policy': 'require-corp',
+      });
+      res.end(content, 'utf-8');
+    }
+  });
+});
+
+const wss = new WebSocket.Server({ noServer: true });
+wss.on('connection', () => { });
+server.on('upgrade', (request, socket, head) => {
+  if (request.url === '/control') {
+    wss.handleUpgrade(request, socket, head, (ws) => {
+      wss.emit('connection', ws, request);
+    });
+  } else {
+    socket.destroy();
+  }
+});
+
+function broadcastRefresh() {
+  const message = JSON.stringify({ type: 'refresh' });
+  let clientCount = 0;
+
+  wss.clients.forEach((client) => {
+    if (client.readyState === WebSocket.OPEN) {
+      client.send(message);
+      clientCount++;
+    }
+  });
+
+  if (clientCount > 0) {
+    console.log(`Sent refresh to ${clientCount} client(s)`);
+  }
+}
+
+// Watch files for changes
+const watchers = [];
+watchPaths.forEach((watchPath) => {
+  try {
+    const watcher = fs.watch(watchPath, { recursive: true }, (eventType, filename) => {
+      console.log(`File changed: ${filename} (${eventType})`);
+      if (filename) {
+        console.log(`File changed: ${filename} (${eventType})`);
+        broadcastRefresh();
+      }
+    });
+    watchers.push(watcher);
+    console.log(`Watching: ${path.resolve(watchPath)}`);
+  } catch (error) {
+    console.error(`Failed to watch ${watchPath}:`, error.message);
+  }
+});
+
+server.listen(config.port, () => {
+  console.log(`Server running at http://localhost:${config.port}/`);
+  console.log(`WebSocket listening on ws://localhost:${config.port}/control`);
+  console.log(`WASM binary path configured as: ${binDir}`);
+
+  const shouldLaunchBrowser = process.argv.includes('--launch');
+  if (shouldLaunchBrowser) {
+    exec(`librewolf --new-window http://localhost:${config.port}/`, (error) => {
+      if (error) {
+        console.error(`Failed to launch LibreWolf: ${error.message}`);
+      } else {
+        console.log('LibreWolf launched');
+      }
+    });
+  }
+});