node笔记

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文章目录

⭐前言

大家好我是yma16本期分享node搭建http服务的教程。
往期文章
node_windows环境变量配置
 node_npm发布包
 linux_配置node
node_nvm安装配置

⭐初始化项目

创建一个node_server目录

$ mkdir node_server
$ cd node_server

node_server

npm init

初始化package.json文件

$ npm init

npm_init
安装 http依赖

$ npm install http

调整npm 的script运行入口

调整script的dev 为node 执行的入口 main/index.js文件

{
  "name": "node_server",
  "version": "1.0.0",
  "description": "http server ",
  "main": "main/index.js",
  "scripts": {
    "dev": "node ./main/index.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "yma16",
  "license": "ISC",
  "dependencies": {
    "http": "^0.0.1-security"
  }
}

搭建hello world的http服务

index.js写一个http返回

const { createServer } = require('http');

const honstname= '127.0.0.1';
const port= '3000';

const server = createServer((req, resp) => {
  // the first param is status code it returns
  // and the second param is response header info
  resp.statusCode=200;
  resp.setHeader({ 'Content-Type': 'text/plain' })
  // resp.writeHead(200, { 'Content-Type': 'text/plain' });
  console.log('server is working...');

  // call end method to tell server that the request has been fulfilled
  resp.end('Hello World');
});

server.listen(port, honstname, (error) => {
  if (error) {
    console.log('Something wrong: ', error);
    return;
  }

  console.log(`Server running at http://${hostname}:${port}/`);
});

npm run dev执行主函数的http服务

执行npm run dev

$ npm run dev

npm run dev

浏览运行的http地址 http://localhost:3000出现搭建的hello world 说明搭建的http服务成功
在这里插入图片描述

⭐http返回类型

指定http返回的类型

html文件
json数据类型

html模板文件返回

渲染一个类似于python的web框架django渲染template

安装express

$ npm install express

渲染html的字符串

使用express渲染html的字符串

const hostname = '127.0.0.1';
const port = 3000;

const express = require("express");
const app = express();

app.listen(port,hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});

app.get("/", (req, res) => {
  res.send("<html> <head>server Response</head><body><h1> This page was render direcly from the server <p>Hello there welcome to my website</p></h1></body></html>");
});

访问页面渲染html成功
express_html

渲染html文件 sendFile

login的html文件一个登录的效果
在inscode查看效果

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>login</title>
	</head>
	<style>
		* {
			margin: 0;
			padding: 0;
		}

		body {
			background: #5D4157;
			/* fallback for old browsers */
			background: -webkit-linear-gradient(to left, #A8CABA, #5D4157);
			/* Chrome 10-25, Safari 5.1-6 */
			background: linear-gradient(to left, #A8CABA, #5D4157);
			/* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
			animation: backdiv 12s infinite;
			background-position: 0% 50%;
			background-size: 400%;
		}

		@keyframes backdiv {
			0% {
				background-position: 0% 50%;
			}

			50% {
				background-position: 100% 50%;
			}

			100% {
				background-position: 0% 50%;
			}
		}

		.title {
			text-align: center;
			padding: 50px 0 20 px;
		}

		.title h1 {
			margin: 0;
			padding: 0;
			color: #fff;
			/* text-transform: uppercase; */
			font-size: 36px;
		}

		.container {
			width: 50%;
			height: 400px;
			margin: 0 auto;
			border: 2 px solid #fff;
			box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
		}

		.container .left {
			float: left;
			width: 50%;
			height: 400px;
			background: url(./html/img/background.jpg);
			background-size: cover;
			box-sizing: border-box;
		}

		.container .right {
			float: right;
			width: 50%;
			height: 400px;
			box-sizing: border-box;
			background: #fff;
		}

		.formBox {
			width: 100%;
			padding: 80px 40px;
			height: 400px;
			background: #fff;
			box-sizing: border-box;
			/* opacity: 0.6; */
		}

		.formBox .p {
			margin: 0;
			padding: 0;
			font-weight: bold;
			color: #a6af13;
		}

		.formBox input {
			width: 100%;
			margin-bottom: 20px;
		}

		.formBox input[type="text"] {
			border: none;
			border-bottom: 2px solid #a6af13;
			outline: none;
			height: 40px;
		}

		.formBox input[type="password"] {
			border: none;
			border-bottom: 2px solid #a6af13;
			outline: none;
			height: 40px;
		}

		.formBox input[type="text"]:focus {
			border-bottom: 2px solid #262626;
		}

		.formBox input[type="password"]:focus {
			border-bottom: 2px solid #262626;
		}

		.formBox input[type="submit"] {
			border: none;
			outline: none;
			height: 40px;
			color: #fff;
			background: #262626;
			cursor: pointer;
		}

		.formBox input[type="submit"]:hover {
			background: #a6af13;
		}

		.formBox a {
			font-weight: bold;
			color: #262626;
			font-size: 12px;
		}
	</style>
	<body>
		<div class="title">
			<h1>login form</h1>
		</div>
		<div class="container">
			<div class="left"></div>
			<div class="right">
				<div class="formBox">
					<form>
						<p>username</p>
						<input type="text" name="" placeholder="name" />
						<p>password</p>
						<input type="password" name="" placeholder="password" />
						<input type="submit" name="" value="sign" />
						<a href="#">forget password</a>
					</form>

				</div>

			</div>
		</div>
	</body>
</html>

index内容

const hostname = '127.0.0.1';
const port = 3000;

const express = require("express");
const app = express();

app.listen(port,hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});
// server your css as static
app.use(express.static(__dirname));

app.get("/", (req, res) => {
	console.log(__dirname)
	res.sendFile(__dirname + "/html/login.html");
});

访问出现html的内容
login

渲染json返回数据类型 res.json

const hostname = '127.0.0.1';
const port = 3000;
const express = require("express");
const app = express();

app.listen(port,hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});
// server your css as static
app.use(express.static(__dirname));

app.get("/", (req, res) => {
	console.log(__dirname)
	res.json({
		code:200,
		data:'hello yma16',
		msg:'csdn'
	})
});