视频地址:https://www.cctalk.com/v/15114923882788
处理静态资源
无非花开花落,静静。
指定静态资源目录
这里我们使用第三方中间件: koa-static
安装并使用
安装 koa-static
:
npm i koa-static -S
修改 app.js
,增加并指定 /public
目录为静态资源目录。
const Koa = require('koa')
const path = require('path')
const bodyParser = require('koa-bodyparser')
const nunjucks = require('koa-nunjucks-2')
// 引入 koa-static
const staticFiles = require('koa-static')
const app = new Koa()
const router = require('./router')
// 指定 public目录为静态资源目录,用来存放 js css images 等
app.use(staticFiles(path.resolve(__dirname, "./public")))
app.use(nunjucks({
ext: 'html',
path: path.join(__dirname, 'views'),
nunjucksConfig: {
trimBlocks: true
}
}));
app.use(bodyParser())
router(app)
app.listen(3000, () => {
console.log('server is running at http://localhost:3000')
})
之后我们对项目的视图进行美化,使之更为赏心悦目。
增加样式文件
在 /public/home/
目录下新增样式文件 main.css
,内容如下:
*{
padding: 0;
margin: 0;
}
body,html{
font-size: 14px;
color: #000;
background: #fff;
font-family: Helvetica Neue,Helvetica,Segoe UI,Arial,Hiragino Sans GB,Microsoft YaHei;
-webkit-font-smoothing: antialiased;
position: relative;
}
.fn-clear:after {
visibility: hidden;
display: block;
font-size: 0;
content: " ";
clear: both;
height: 0
}
.fn-clear {
zoom:1}
a {
color: #0366d6;
text-decoration: none;
}
a:hover {
text-decoration: none;
}
.header{
width: 100%;
background-color: #474747;
}
.header-box{
height: 30px;
line-height: 30px;
font-size: 12px;
letter-spacing: 2px;
color: #d5d5d5;
transition: color .3s;
}
.header-box>.logo{
letter-spacing: 0;
font-size: 12px;
}
.wraper{
width: 1200px;
margin: 0 auto;
}
.container{
min-height: 500px;
padding: 80px 0;
}
.footer{
background: #262a30;
padding: 50px 0;
border-top: 1px solid #ddd;
color: #999;
font-size: 16px;
}
.footer-box{
width: 800px;
margin: 0 auto;
text-align: center;
}
.banner_box{
width: 100%;
min-width: 1200px;
height: 438px;
background: url(https://res.hjfile.cn/cc/cctalk.hujiang.com/home/images/banner-2QEtv.jpg?2QEtv) 50% no-repeat;
background-size: cover;
}
.banner_box>.banner_inner{
width: 1200px;
margin: 0 auto;
padding-top: 112px;
}
.banner_inner>.slogan{
width: 427px;
height: 54px;
background: url(https://res.hjfile.cn/cc/cctalk.hujiang.com/home/images/[email protected]?3x9xM);
background-size: 100% auto;
margin: 0 auto 25px;
text-indent: -99999rem;
}
.banner_inner>.des{
margin-bottom: 24px;
font-size: 16px;
line-height: 1.9;
color: #fff;
text-align: center;
}
.banner_inner>.btn{
display: block;
margin: 0 auto;
width: 220px;
height: 48px;
font-size: 20px;
line-height: 48px;
border-radius: 4px;
background-color: #15a9ff;
color: #fff;
text-align: center;
text-decoration: none;
box-shadow: 0 2px 6px rgba(0,0,0,.3);
}
.show_time>.feature-con{
background: #fff;
border-bottom: 2px solid #f8f8f8;
min-width: 1200px;
}
.feature-con>.feature{
list-style: none;
margin: 0 auto;
padding: 40px 0 60px;
width: 1200px;
}
.feature>.feature-item{
float: left;
width: 160px;
margin: 0;
padding: 0;
margin-right: 132px;
}
.feature>.feature-item:first-child{
margin-left: 88px;
}
.feature>.feature-item:last-child{
margin-right: 0;
}
.feature .ico{
display: inline-block;
width: 160px;
height: 130px;
background: url(https://res.hjfile.cn/cc/cctalk.hujiang.com/home/images/[email protected]?BvNad);
background-size: 100% auto;
}
.feature>.feature-item:nth-child(2) .ico{
background-image: url(https://res.hjfile.cn/cc/cctalk.hujiang.com/home/images/[email protected]);
}
.feature>.feature-item:nth-child(3) .ico{
background-image: url(https://res.hjfile.cn/cc/cctalk.hujiang.com/home/images/[email protected]);
}
.feature>.feature-item:nth-child(4) .ico{
background-image: url(https://res.hjfile.cn/cc/cctalk.hujiang.com/home/images/[email protected]);
}
.feature-item>.tit{
padding: 0;
margin: 0;
font-size: 16px;
line-height: 26px;
color: #333;
text-align: center;
font-weight: 400;
}
.feature-item>.des{
padding: 0;
margin: 0;
font-size: 16px;
line-height: 26px;
color: #333;
text-align: center;
opacity: .5;
}
.hp-overlay{
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
z-index: 99999;
opacity: .5;
filter: Alpha(opacity=50);
background-color: #000;
}
.hp-dialog{
width: 370px;
border-radius: 5px;
background-color: #fff;
outline: 0;
box-shadow: 0 5px 30px rgba(0,0,0,.2);
z-index: 1000000;
position: fixed;
left: 50%;
top: 50%;
-webkit-transform: translate(-50%,-50%);
-ms-transform: translate(-50%,-50%);
transform: translate(-50%,-50%);
}
.hp-box{
padding: 12px 30px 30px;
color: #333;
}
.hp-box h1{
line-height: 48px;
text-align: center;
font-size: 20px;
font-weight: 400;
margin-bottom: 12px;
}
.hp-box .error{
color: red;
line-height: 30px;
}
.hp-box input{
display: block;
width: 100%;
height: 42px;
padding: 10px 10px 10px 10px;
border-radius: 3px;
border: 1px solid #e5e5e5;
font-size: 14px;
line-height: 20px;
outline: 0;
-webkit-appearance: none;
appearance: none;
-webkit-transition: border .2s ease;
transition: border .2s ease;
margin-bottom: 30px;
box-sizing: border-box;
}
.hp-box button{
display: block;
width: 100%;
height: 42px;
background-color:#44b336;
border: 0;
border-radius: 3px;
color: #fff;
font-size: 18px;
line-height: 42px;
text-align: center;
outline: 0;
cursor: pointer;
}
.hp-box input:focus,.hp-box input:focus:hover {
border: 1px solid #44b336
}
.hp-box input:hover {
border: 1px solid #ddd
}
.hp-box input::-webkit-input-placeholder {
color: #ddd
}
.hp-box input::-ms-input-placeholder {
color: #ddd
}
.hp-box input::-ms-reveal {
display: none
}
.hp-box input::-ms-clear {
display: none
}
.footer .title{
font-size: 24px;
}
.footer .info{
letter-spacing: 2px;
}
然后修改 views
视图文件,按照继承的方式提取出公用部分。
增加公用视图
新建 /views/common/header.html
Node实战教程 | © iKcamp
新建 /views/common/footer.html
新建 /views/common/layout.html
。注意,此处有模板变量 title
。
{{title}}
{% block head %} {% endblock %}
{% include "./header.html" %}
{% block body %}
{% endblock %}
{% include "./footer.html" %}
{% block content %}
{% endblock %}
layout.html
就是我们的基础页面。现在我们再为 home
创建专用的 layout-home.html
,并在里面引用之前创建的样式表:
新建 /views/common/layout-home.html
。注意,我们在 body
模块里又增加了一个 homeBanner
模块:
{% extends "./layout.html" %}
{% block head %}
{% endblock %}
{% block body %}
{% block homeBanner %}
{% endblock %}
-
免费资源
为天地立心
-
体系知识
为科技立命
-
实战项目
为大牛继绝学
-
线下交流
为教育开太平
{% endblock %}
公用部分提取完成之后,重写 home
交互页面。此时我们对登录功能的视图进行美化,有主页,登录,以及登录后的响应页面。
重写 home 业务的视图
新增 /views/home/index.html
首页
{% extends "common/layout-home.html" %}
{% block homeBanner %}
{% endblock %}
修改 /views/home/login.html
登录页面
{% extends "common/layout-home.html" %}
{% block homeBanner %}
{% endblock %}
{% endblock %}
{% block content %}
新增 /views/home/success.html
成功页面
{% extends "common/layout-home.html" %}
{% block homeBanner %}
{% endblock %}
增加完成后,需要对 home
的处理逻辑进行修改
重写 home 处理逻辑
修改 /service/home.js
module.exports = {
register: async function(name, pwd) {
let data
if(name == 'ikcamp' && pwd == '123456'){
data = {
status: 0,
data: {
title: "个人中心",
content: "欢迎进入个人中心"
}
}
}else{
data = {
status: -1,
data: {
title: '登录失败',
content: "请输入正确的账号信息"
}
}
}
return data
}
}
修改 /controller/home.js
中的 index
和 register
方法:
const HomeService = require("../service/home")
module.exports = {
// 修改 index 方法
index: async function (ctx, next) {
await ctx.render("home/index", {title: "iKcamp欢迎您"})
},
// 修改 register 方法
register: async function (ctx, next){
let params = ctx.request.body
let name = params.name
let password = params.password
let res = await HomeService.register(name,password)
if(res.status == "-1"){
await ctx.render("home/login", res.data)
}else{
ctx.state.title = "个人中心"
await ctx.render("home/success", res.data)
}
}
}
运行代码,并通过浏览器访问 localhost:3000
:
点击进入战场
验证失败
验证成功
目前,项目的基本功能都已完善。结构目录如下:
├── controller/
│ ├── home.js
├── service/
│ ├── home.js
├── views/
│ ├── common/
│ ├── header.html
│ ├── footer.html
│ ├── layout.html
│ ├── layout-home.html
│ ├── home/
│ ├── index.html
│ ├── login.html
│ ├── success.html
├── public/
│ ├── home/
│ ├── main.css
├── app.js
├── router.js
├── package.json
在后面的章节中,我们将进一步完善其他功能,例如 JSON
数据传递,错误处理机制,日志记录功能等。
下一篇:提升篇 - 解析JSON——让 Koa2 支持响应 JSON 数据
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