koa

What happens when promise is yielded in javascript?

我是研究僧i 提交于 2019-11-27 15:17:50
Didn't find full answer .. What happens when promise is yielded? Is such construction var p = new Promise() p.resolve(value) function * (){ yield p } equivalent to function * (){ yield value } ? UPDATE How to mix different styles of async programming, for example for such framework as koa? Koa middlewares are working with generators, but there are lots of good packages which are promise-based (sequelize for ex.) As Felix says, a promise is just another value to be yielded. However, there is a style of writing asynchronous code which makes use of yielded promises in a particular way. This

node.js使用Koa搭建基础项目

落爺英雄遲暮 提交于 2019-11-27 13:21:31
Koa 是由 Express 原班人马打造的超轻量服务端框架 与 Express 相比,除了自由度更高,可以自行引入中间件之外,更重要的是使用了 ES6 + async,从而避免了回调地狱 不过也是因为代码升级,所以 Koa2 需要 v7.60 以上的 node.js 环境 一、创建项目   1.手动创建一个项目目录,然后快速生成一个 package.json 文件     $ npm init -y   安装 koa //当前版本 2.4.1     $ npm install koa -s    然后创建一个 app.js const Koa = require('koa'); const app = new Koa(); app.use(async ctx => { ctx.body = 'hello 你好'; }); app.listen(3000);   在cmd中输入node app.js就可以启动项目了,在浏览器输入http://localhost:3000/ 查看效果      或者你在package.json,更改代码:      输入命令,npm start也是一样的,可以运行项目,这样一个最基础的koa应用就好了!   2.利用脚手架 koa-generato 来生成项目     打开cmd,输入:      $ npm install koa

Running Node.js on Azure Web App

眉间皱痕 提交于 2019-11-27 07:30:10
问题 I am trying to run a very simple node.js server on an Azure Web Appp to serve a single page application. The server will serve up static pages, and will always server 'index.html' for page requests as all the routing is done client side. All works absolutely perfectly locally, but when deploying to Azure, any page requests result in a 'the resource you are looking for has been removed...', which suggests the node server isn't being hit. I am using Koa as the server, and the server.js is here;