api.js

const Router = require('koa-router');
let router = new Router();

module.exports = {
    restify: () => {
        return async (ctx, next) => {
            // 是否是REST API前缀判断
            if (ctx.request.path.startsWith('/api/')) {
                ctx.json = (data = {}, code = 0, msg = 'ok') => {
                    ctx.response.type = 'application/json; charset=utf-8';
                    ctx.response.body = { code, msg, data };
                };
                ctx.restError = (msg = '', code = -1, status = 400) => {
                    code = code || 'internal:unknown_error';
                    ctx.response.status = status;
                    ctx.response.type = 'application/json; charset=utf-8';
                    ctx.response.body = { code, msg };
                };
            }
            await next();
        };
    },
    routes: () => {
        require(`${__dirname}/../api/index.js`).map((subrouters, i) => {
            router.use(subrouters.routes()).use(subrouters.allowedMethods());
        });
        return router.routes();
    },
};