来自知乎。
需要先安装一个node,安装过程不表。
// 复制这个文件到目录,再输入一下命令: // npm i express // node nodeServer.js
// 启动之后可以通过浏览器尝试访问: localhost:3000/123
var express = require('express'); var app = express(); //---------------------------------------------------------- // 设置跨域访问 app.all('*', function (req, res, next) { res.header("Access-Control-Allow-Origin", "*"); res.header("Access-Control-Allow-Headers", "X-Requested-With"); res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS"); res.header("X-Powered-By", ' 3.2.1'); res.header("Content-Type", "application/json;charset=utf-8"); next(); }); //----------------------------------------------------------- // 测试新建一个接口 var questions = [ { data: 213, num: 444, age: 12 }, { data: 456, num: 678, age: 13 } ]; // 写个接口123 app.get('/123', function (req, res) { res.status(200), res.json(questions) }); // 配置服务端口3000 var server = app.listen(3000, function () { var host = server.address().address; var port = server.address().port; console.log('Example app listening at http://%s:%s', host, port); })
标签:node,启动,res,app,express,接口,header,var From: https://www.cnblogs.com/ximu1009/p/16922513.html