使用React js完成web前端

chusql-web/frontend/bin/lib/args.js

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+// 命令行参数解析：命令、动作、全局选项与取值校验。
+
+const HOST_PATTERN = /^[A-Za-z0-9.:[\]-]+$/;
+
+function valueAfter(argv, index, label) {
+  const value = argv[index + 1];
+  if (!value || value.startsWith('--')) throw new Error(`${label} requires a value.`);
+  return value;
+}
+
+export function parseArgs(argv) {
+  const result = { command: 'help', action: '', operands: [], autoOpenBrowser: undefined };
+  let index = 0;
+  if (argv[index] && !argv[index].startsWith('-')) {
+    result.command = argv[index];
+    index += 1;
+  } else if (argv.length) {
+    result.command = argv[0] === '--version' || argv[0] === '-v' ? 'version' : 'help';
+  }
+  if (result.command === 'config' && argv[index] && !argv[index].startsWith('-')) {
+    result.action = argv[index];
+    index += 1;
+  }
+  while (index < argv.length) {
+    const token = argv[index];
+    if (token === '--help' || token === '-h') result.help = true;
+    else if (token === '--no-open') result.autoOpenBrowser = false;
+    else if (token === '--port') {
+      const raw = valueAfter(argv, index, 'Port');
+      if (!/^\d+$/.test(raw) || Number(raw) < 1 || Number(raw) > 65535) throw new Error('Port must be an integer between 1 and 65535.');
+      result.port = Number(raw);
+      index += 1;
+    } else if (token === '--host') {
+      const host = valueAfter(argv, index, 'Host');
+      if (!HOST_PATTERN.test(host)) throw new Error('Host contains invalid characters.');
+      result.host = host;
+      index += 1;
+    } else if (token === '--adapter') {
+      const adapter = valueAfter(argv, index, 'Adapter');
+      if (adapter !== 'mock' && adapter !== 'rest') throw new Error('Adapter must be mock or rest.');
+      result.adapter = adapter;
+      index += 1;
+    } else if (token === '--config') {
+      result.configPath = valueAfter(argv, index, 'Config');
+      index += 1;
+    } else if (token.startsWith('-')) {
+      throw new Error(`Unknown option: ${token}`);
+    } else {
+      result.operands.push(token);
+    }
+    index += 1;
+  }
+  return result;
+}