本篇完成如下场景：
1、系统包含首页、客户信息查询、登录三个模块
2、默认进入系统首页，如果要进行用户查询，则需要进行登录授权
3、查询用户后点击列表项，则进入详情页面
基于上述场景需求描述，在客户端我们考虑，需要设计如下组件：Home组件、客户列表组件、客户详情组件、登录组件
在服务器端考虑需要：用户认证服务；客户列表查询服务、客户详情查询服务。
ok，现在我们从上往下,先创建我们的基本目录结构，
当前目录结构如下：
app.js node web 启动文件
node_modules node模块文件（关于node模块安装这里不再介绍）
public 存放静态文件比如index.html 浏览器端执行的css或者js文件、图片、文字等等。当前包含两个文件 index.html,app.js (组件定义等文件)
router 后端路由文件，比如可以把portal部分进行抽象到路由文件夹
middleware 中间件 文件夹，我们会定义鉴权中间件
package.json npm包配置文件
由我们的客户端开始设计，构建我们的组件：
首先Home组件，Home组件，简单的potal信息展示，这里为了演示，就直接显示一串基本信息，在public／app.js中添加如下代码：
var HomeComponent = {
template: `<div>
<h1>Home 页面，portal页</h1>
<h2>以下数据来自服务端</h2>
{{stat}}
</div>`,
data:function(){
return {
stat:''//代表相关统计信息等
}
},
methods:{
getStat:function(){
return axios.get('/portal');
}
},
created:function(){
this.getStat().then(res=>{
this.stat=JSON.stringify(res.data);
}).catch(err=>{
console.log(err);
})
}
}
这里一个新的知识axios，这是一个vue的Ajax库，由于vue-resource已不再更新，官方推荐使用axios；上述代码逻辑很简单，在组件初始化时，请求后端数据，返回后进行简单的数据绑定；对应的后端接口（数据只是模拟），在／app.js下添加如下代码：
var express = require("express");
var app = express();
app.use(express.static('public'));
app.get('/portal',function(req,res){
res.json({
data:[
{
visits:12,
clicks:100
},
{
location:'BeiJing',
total:17
}
]
})
})
app.listen(8110,function(){
console.log("port 8110 is listenning!!!");
});
这里就是最基础的express代码了，只是做了两件事情，第一，设置静态目录为public，设置路由／portal，对应前端请求。
为了让程序运行起来，我们修改我们的／public/index.html代码如下：
<!DOCTYPE html>
<html lang="en"> <head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>demo3</title>
<script src="https://cdn.bootcss.com/vue/2.4.1/vue.js"></script>
<script src="https://cdn.bootcss.com/vue-router/2.7.0/vue-router.js"></script>
<script src="https://unpkg.com/axios/dist/axios.min.js"></script> </head> <body>
<div id="app"> </div>
<script src="./app.js"></script>
</body> </html>
在public／app.js中为组件Home设置路由，并启用路由配置：
var router = new VueRouter({
//TODO:各种路由定义；
routes: [{
name: 'home', path: '/home', component: HomeComponent
}
]
});
var app = new Vue({
router: router,
template: `
<div>
<router-view></router-view>
</div>
`,
el: '#app'
});
打开控制台，进入到项目根目录，执行node app.js 启动后台服务，在浏览器打开http://localhost:8110/#/home ,可以看到如下效果：
接下来，在public／app.js文件中添加我们的另外三个组件：客户列表组件，详情组件和登录组件，并配置路由，最终代码如下：
var LoginComponent = {
template: `
<div class="login" >
username:<input type="text" v-model="user.username" />
password:<input type="password" v-model="user.password" />
<input type="button" @click="login()" value="login" />
</div>
`,
data: function () {
return {
user: {
username: '',
password: ''
}
}
},
methods: {
login: function () {
axios.post('/login',{params: this.user})
.then(function (res) {
if (res.success) {
localStorage.setItem('token', res.token);
}
})
.catch(function (error) {
console.log(error);
});
}
}
}
var CustomerListComponent = {
template: `
<div>
<div>
<input type="text" v-model="keyword" /> <input type="button" @click="getCustomers()" value="search" />
</div>
<ul>
<router-link v-for="c in customers" tag="li" :to="{name:'detail',params:{id:c.id}}" :key="c.id">{{c.name}}</router-link>
</ul>
</div>
`,
data: function () {
return {
customers: [],
keyword: ''
}
},
created: function () {
this.getCustomers();
},
methods: {
getCustomers: function () {
axios.get('/api/getCustomers', { params: { keyword: this.keyword } })
.then(res => { this.customers = res.data; console.log(res) })
.catch(err => console.log(err));
},
}
}
var CustomerComponent = {
template: `
<div>
{{customer}}
</div>
`,
data: function () {
return {
customer: {}
}
},
created: function () {
var id = this.$route.params.id;
this.getCustomerById(id);
},
watch: {
'$route': function () {
console.log(this.$route.params.id);
}
},
methods: {
getCustomerById: function (id) {
axios.get('/api/customer/'+id)
.then(res => this.customer = res.data)
.catch(err => console.log(err));
}
}
}
var HomeComponent = {
template: `<div>
<h1>Home 页面，portal页</h1>
<h2>以下数据来自服务端</h2>
{{stat}}
</div>`,
data: function () {
return {
stat: ''//代表相关统计信息等
}
},
methods: {
getStat: function () {
return axios.get('/portal');
}
},
created: function () {
this.getStat().then(res => {
this.stat = JSON.stringify(res.data);
}).catch(err => {
console.log(err);
})
}
}
var router = new VueRouter({
//TODO:各种路由定义；
routes: [{
name: 'home', path: '/home', component: HomeComponent
},
{
name: 'customers', path: '/customers', component: CustomerListComponent,
},
{
name: 'detail', path: '/detail/:id', component: CustomerComponent,
},
{
name: 'login', path: '/login', component: LoginComponent
}
]
});
//注册全局事件钩子
//TODO:会在下一篇中详细分析
// router.beforeEach(function (to, from, next) {
// if (to.matched.some(r => r.meta.auth)) {
// if (!localStorage.getItem('token')) {
// console.log("需要登录");
// next({
// path: '/login',
// query: { to: to.fullPath }
// })
// } else {
// next();
// }
// } else {
// next()
// }
// });
var app = new Vue({
router: router,
template: `
<div>
<router-link :to="{name:'home'}" >Home</router-link>
<router-link :to="{name:'customers'}" >Customers</router-link>
<router-view></router-view>
</div>
`,
el: '#app'
});
后台根据接口添加如下路由，在router文件夹中，添加customers.js文件，加入如下代码：
var router = require("express").Router();
var db = require('./fakeData');
router.get('/getCustomers', function (req, res) {
var list = db.data;
list = list.filter(v => v.name.indexOf(req.query.keyword) !== -1);
res.json(list);
});
router.get('/customer/:id',function(req,res){
var list=db.data;
var obj=list.filter(v=>v.id==req.params.id)[0];
res.json(obj);
})
module.exports = router;
同时在/app.js中修改代码如下：
var express = require("express");
var authMiddleware=require('./middleware/authMiddleware');
var customerRouter=require('./router/customers');
var app = express();
app.use(express.static('public'));
app.get('/portal',function(req,res){
res.json({
data:[
{
visits:12,
clicks:100
},
{
location:'BeiJing',
total:17
}
]
})
})
//TOOD:下一篇会详细讲，先忽略
// app.use(authMiddleware);
app.use('/api',customerRouter);
app.listen(8110,function(){
console.log("port 8110 is listenning!!!");
});
重新执行node app.js，刷新浏览器，看到最终效果如下：
上述vue的代码，我们在前面几篇都有所提及，没有陌生格式的代码，大家有疑问的可以提comment。下一篇中会加入授权，包括前端路由控制以及后端接口访问控制，今天就到这里吧，最近比较忙，更新进度有点慢，下一篇完善权限，在本部分代码中已加入todo标示，有兴趣的可以考虑一下()。
本篇完整代码如下：
public/index.html
<!DOCTYPE html>
<html lang="en"> <head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>demo3</title>
<script src="https://cdn.bootcss.com/vue/2.4.1/vue.js"></script>
<script src="https://cdn.bootcss.com/vue-router/2.7.0/vue-router.js"></script>
<script src="https://unpkg.com/axios/dist/axios.min.js"></script> </head> <body>
<div id="app"> </div>
<script src="./app.js"></script>
</body> </html>
public/app.js
var LoginComponent = {
template: `
<div class="login" >
username:<input type="text" v-model="user.username" />
password:<input type="password" v-model="user.password" />
<input type="button" @click="login()" value="login" />
</div>
`,
data: function () {
return {
user: {
username: '',
password: ''
}
}
},
methods: {
login: function () {
axios.post('/login', this.user)
.then(function (res) {
if (res.success) {
localStorage.setItem('token', res.token);
}
})
.catch(function (error) {
console.log(error);
});
}
}
}
var CustomerListComponent = {
template: `
<div>
<div>
<input type="text" v-model="keyword" /> <input type="button" @click="getCustomers()" value="search" />
</div>
<ul>
<router-link v-for="c in customers" tag="li" :to="{name:'detail',params:{id:c.id}}" :key="c.id">{{c.name}}</router-link>
</ul>
</div>
`,
data: function () {
return {
customers: [],
keyword: ''
}
},
created: function () {
this.getCustomers();
},
methods: {
getCustomers: function () {
axios.get('/api/getCustomers', { params: { keyword: this.keyword } })
.then(res => { this.customers = res.data; console.log(res) })
.catch(err => console.log(err));
},
}
}
var CustomerComponent = {
template: `
<div>
{{customer}}
</div>
`,
data: function () {
return {
customer: {}
}
},
created: function () {
var id = this.$route.params.id;
this.getCustomerById(id);
},
watch: {
'$route': function () {
console.log(this.$route.params.id);
}
},
methods: {
getCustomerById: function (id) {
axios.get('/api/customer/'+id)
.then(res => this.customer = res.data)
.catch(err => console.log(err));
}
}
}
var HomeComponent = {
template: `<div>
<h1>Home 页面，portal页</h1>
<h2>以下数据来自服务端</h2>
{{stat}}
</div>`,
data: function () {
return {
stat: ''//代表相关统计信息等
}
},
methods: {
getStat: function () {
return axios.get('/portal');
}
},
created: function () {
this.getStat().then(res => {
this.stat = JSON.stringify(res.data);
}).catch(err => {
console.log(err);
})
}
}
var router = new VueRouter({
//TODO:各种路由定义；
routes: [{
name: 'home', path: '/home', component: HomeComponent
},
{
name: 'customers', path: '/customers', component: CustomerListComponent,
},
{
name: 'detail', path: '/detail/:id', component: CustomerComponent,
},
{
name: 'login', path: '/login', component: LoginComponent
}
]
});
//注册全局事件钩子
//TODO:会在下一篇中详细分析
// router.beforeEach(function (to, from, next) {
// if (to.matched.some(r => r.meta.auth)) {
// if (!localStorage.getItem('token')) {
// console.log("需要登录");
// next({
// path: '/login',
// query: { to: to.fullPath }
// })
// } else {
// next();
// }
// } else {
// next()
// }
// });
var app = new Vue({
router: router,
template: `
<div>
<router-link :to="{name:'home'}" >Home</router-link>
<router-link :to="{name:'customers'}" >Customers</router-link>
<router-view></router-view>
</div>
`,
el: '#app'
});
router/customers.js
var router = require("express").Router();
var db = require('./fakeData');
router.get('/getCustomers', function (req, res) {
var list = db.data;
list = list.filter(v => v.name.indexOf(req.query.keyword) !== -1);
res.json(list);
});
router.get('/customer/:id',function(req,res){
var list=db.data;
var obj=list.filter(v=>v.id==req.params.id)[0];
res.json(obj);
})
module.exports = router;
middleware/authMiddleware.js
module.exports=function(req,res,next){
if(req.path="/login"){
res.json({
success:true
})
}
next();
}
app.js
var express = require("express");
var authMiddleware=require('./middleware/authMiddleware');
var customerRouter=require('./router/customers');
var app = express();
app.use(express.static('public'));
app.get('/portal',function(req,res){
res.json({
data:[
{
visits:12,
clicks:100
},
{
location:'BeiJing',
total:17
}
]
})
})
//TOOD:下一篇会详细讲，先忽略
// app.use(authMiddleware);
app.use('/api',customerRouter);
app.listen(8110,function(){
console.log("port 8110 is listenning!!!");
});