autosnippet
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Extract code patterns into a knowledge base for AI coding assistants
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JavaScript
/**
* Gateway 中间件
* 为 Express 请求注入 Gateway 执行能力
* 路由层通过 req.gw(action, resource, data) 发起 Gateway 请求
*
* actor 来源优先级：
* 1. req.resolvedRole — roleResolver 中间件已解析（双路径）
* 2. req.headers['x-user-id'] — 内部 / MCP 调用
* 3. 'anonymous' — 兜底
*/
import { getServiceContainer } from '../../injection/ServiceContainer.js';
/** Error subclass with Gateway-specific properties */
class GatewayError extends Error {
statusCode;
code;
requestId;
constructor(message, statusCode, code, requestId) {
super(message);
this.name = 'GatewayError';
this.statusCode = statusCode;
this.code = code;
this.requestId = requestId;
}
}
/** Express 中间件：将 Gateway 注入到 req 对象 */
export function gatewayMiddleware() {
return (req, _res, next) => {
/**
* Gateway 快捷执行方法
* @param action 操作标识 (如 'candidate:create')
* @param resource 资源类型 (如 'candidates')
* @param data 请求数据
* @returns >}
*/
req.gw = async (action, resource, data = {}) => {
const container = getServiceContainer();
const gateway = container.get('gateway');
// 优先使用 roleResolver 解析的角色，其次 header，最后兜底
const actor = req.resolvedRole || String(req.headers['x-user-id'] || '') || 'anonymous';
const result = await gateway.execute({
actor,
action,
resource,
data: {
...data,
_ip: req.ip,
_userAgent: req.headers['user-agent'] || '',
_resolvedUser: req.resolvedUser || undefined,
},
session: req.headers['x-session-id'],
});
if (!result.success) {
throw new GatewayError(result.error?.message || 'Gateway error', result.error?.statusCode || 500, result.error?.code || '', result.requestId);
}
return result;
};
next();
};
}
export default gatewayMiddleware;