Tutorial on using koa2 framework in nodejs6

This article mainly introduces examples of using the koa2 framework under nodejs6. The editor thinks it is quite good. Now I will share it with you and give it a reference. Let’s follow the editor and take a look.

koa2 uses ES7 syntax, such as async and await, so it needs to run after node7.6; but before node7.6, babel can also be used, so koa2 can run.

First install babel in the project, and several babel modules:

npm install babel babel-register babel-preset-env --save

Then introduce 'babel- in the entry file register' module

require('babel-register');

Then introduce the business code:

require('./server.js');

In the configuration .babelrc file:

{
 "presets": [
  ["env", {
   "targets": {
    "node": true
   }
  }]
 ]
}

Example:

app.js:

require('babel-register');

require('./servers/devserver');

devserver.js:

var koa = require('koa');
var app = new koa();
const request = require('request');


let port = process.env.PORT || 8080;
console.log("set port:" + process.env.PORT + "; ip:" + process.env.IP);
app.use(async (ctx) => {
 console.log(ctx.url);
 if (ctx.url.indexOf('/aaa') > -1) {
  
  ctx.response.set('content-type', 'text/javascript');
  ctx.body = request.get('http://127.0.0.1/aa.bundle.js', function(err, response, body) {
   console.log(body);
  });
 }
});
app.listen(port);

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