node --1、项目搭建

一、项目搭建

1、初始化项目：npm init -y

2、安装监听服务：npm install express

3、安装项目启动命令：npm install nodemon -g

4、创建index.js

5、修改package 文件：
"scripts": {
"dev": "nodemon src/index.js"
},

二、目录结构

3、index.js代码

const express = require('express');
const {resolve}=require('path');
const app = express();
app.all("*", (req, res, next) => {
	res.header("Access-Control-Allow-Origin", "*");
	res.header("Access-Control-Allow-methods", "POST,GET")
	next();
})
app.get("/images/:filename",(req,res)=>{
	console.log(__dirname);
	res.sendFile(resolve( __dirname,'./images/'+req.params.filename));
})

app.listen(3000, () => {
	console.log('hello node');
})

4、package.json

{
  "name": "node",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "dev": "nodemon src/index.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC"
}

5、npm run dev 启动项目

6、http://localhost:3000/images/1.jpg 访问图片

node --1、项目搭建

悦读