text: /**
   * 请求体解析中间件
   */
  const koaBody = require('koa-body');
  const bodyParser = require('koa-bodyparser');
  
  module.exports = (options, app) => {
  	let fn = options.parser === 'koa-bodyparser' ? bodyParser(options) : koaBody(options);
  	fn._name = 'body';
  	return fn;
  };