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server/config/app_config.js

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+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { get_env } from './env.js';
+
+function must_get(key) {
+  const v = get_env(key);
+  if (v === undefined || v === null || v === '') {
+    throw new Error(`缺少配置 ${key}`);
+  }
+  return v;
+}
+
+function get_bool(key, default_value) {
+  const v = get_env(key);
+  if (v === undefined || v === null || v === '') {
+    return default_value;
+  }
+  return String(v).toLowerCase() === 'true';
+}
+
+function get_int(key, default_value) {
+  const v = get_env(key);
+  if (v === undefined || v === null || v === '') {
+    return default_value;
+  }
+  const n = Number(v);
+  if (Number.isNaN(n)) {
+    throw new Error(`配置 ${key} 必须是数字`);
+  }
+  return n;
+}
+
+let cached = null;
+
+export function get_app_config() {
+  if (cached) {
+    return cached;
+  }
+
+  const __filename = fileURLToPath(import.meta.url);
+  const __dirname = path.dirname(__filename);
+
+  cached = {
+    mysql: {
+      host: must_get('MYSQL_HOST'),
+      port: get_int('MYSQL_PORT', 3306),
+      user: must_get('MYSQL_USER'),
+      password: must_get('MYSQL_PASSWORD'),
+      database: must_get('MYSQL_DATABASE')
+    },
+    server: {
+      port: get_int('SERVER_PORT', 38080)
+    },
+    crawler: {
+      crx_src_path: must_get('CRX_SRC_PATH'),
+      action_timeout_ms: get_int('ACTION_TIMEOUT_MS', 300000),
+      puppeteer_headless: get_bool('PUPPETEER_HEADLESS', false),
+      chrome_executable_path: (get_env('CHROME_EXECUTABLE_PATH') || '').trim() || path.resolve(__dirname, '../../chrome-win/chrome.exe')
+    }
+  };
+
+  return cached;
+}