Tutorial on using koa2 framework in nodejs6-JS Tutorial-php.cn

Tutorial on using koa2 framework in nodejs6

Y2J

Release： 2018-05-14 16:43:02

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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

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

require(&#39;babel-register&#39;);

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Then introduce the business code:

require(&#39;./server.js&#39;);

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In the configuration .babelrc file:

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

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Example:

app.js:

require(&#39;babel-register&#39;);

require('./servers/devserver');

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devserver.js:

var koa = require(&#39;koa&#39;);
var app = new koa();
const request = require(&#39;request&#39;);


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(&#39;/aaa&#39;) > -1) {
  
  ctx.response.set(&#39;content-type&#39;, &#39;text/javascript&#39;);
  ctx.body = request.get(&#39;http://127.0.0.1/aa.bundle.js&#39;, function(err, response, body) {
   console.log(body);
  });
 }
});
app.listen(port);

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