koa-parameter ​

const Koa = require('koa');
const parameter = require('koa-parameter');
const app = new Koa();

// 注册中间件
app.use(parameter(app));

// 在路由中使用
app.use(async ctx => {
  // 验证请求体参数
  ctx.verifyParams({
    name: { type: 'string', required: true },
    age: { type: 'number', required: false },
    email: { type: 'email', required: true }
  });
  
  ctx.body = { success: true };
});

app.use(async ctx => {
  // 复杂对象验证
  ctx.verifyParams({
    user: {
      type: 'object',
      required: true,
      rule: {
        name: 'string',
        age: { type: 'number', min: 0, max: 120 },
        email: 'email',
        role: { type: 'enum', values: ['admin', 'user'] }
      }
    },
    tags: {
      type: 'array',
      itemType: 'string',
      required: false
    }
  });
});