aspcore配合vue实现后端验证码逻辑
⽬录
概述
部分原理
源码
概述
⽹上的前端验证码逻辑总感觉不安全，验证码建议还是使⽤后端配合验证。
如果产品确定可以上⽹的话，就可以使⽤腾讯，百度等第三⽅验证，对接⽅便。但是产品可能内⽹部署，就必须⾃⼰写了。本⽂章就是基于这⼀点来实现的。
前端验证码显⽰⼀个图⽚，后端⽣成图⽚。
部分原理
1.前端调⽤⽣端获取图⽚时，传⼊⼀个roomID，后端⽣成⼀个4位验征码，放⼊redis中。然后⽣成⼀个图⽚返回。
2.前端显⽰图⽚，登录时将roomID和填写的验证码，⼀并提交，登录接⼝根据roomId从redis中取出验证码判断是否正确。
这样就相当于后端验证了。
⼤家觉得有问题什么，可以进⾏评论。谢谢。
源码
前端部分代码
<template>
<div class="login-container">
<vue-particles
color="#ffffff"
:particleOpacity="0.7"
:particlesNumber="50"
shapeType="circle"
:particleSize="4"
linesColor="#dedede"
:linesWidth="1"
:lineLinked="true"
:lineOpacity="0.4"
:linesDistance="150"
:moveSpeed="2"
:hoverEffect="true"
hoverMode="grab"
:clickEffect="true"
clickMode="push"
></vue-particles>
<el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" autocomplete="on" label-position="left">
<div class="title-container">
<h3 class="title">智能综合管理系统</h3>
</div>
<el-form-item prop="username">
asp查看源码配置ui<span class="svg-container">
<svg-icon icon-class="user" />
</span>
<el-input ref="username" v-model="loginForm.username" placeholder="⽤户名" name="username" type="text" tabindex="1" autocomplete="on" />      </el-form-item>
<el-tooltip v-model="capsTooltip" content="Caps lock is On" placement="right" manual>
<el-form-item prop="password">
<span class="svg-container">
<svg-icon icon-class="password" />
</span>
<el-input
:key="passwordType"
ref="password"
v-model="loginForm.password"
:type="passwordType"
placeholder="密码"
name="password"
tabindex="2"
autocomplete="on"
@keyup.native="checkCapslock"
@blur="capsTooltip = false"
@native="handleLogin"
/>
<span class="show-pwd" @click="showPwd">
<svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
</span>
</el-form-item>
</el-tooltip>
<el-form-item prop="yzm">
<span class="svg-container">
<svg-icon icon-class="password" />
</span>
<el-input type="text" v-model="loginForm.verifyCode" maxlength="4" placeholder="验证码" />
<div class="identifyCode" @click="refreshCode">
<el-image :src="verifyImageUrl"></el-image>
</div>
</el-form-item>
<el-button :loading="loading" type="primary" @click.native.prevent="handleLogin">登录</el-button>    </el-form>
</div>
</template>
<script>
import { validUsername } from '@/utils/validate'
import Identify from './components/Identify'
import { uuid } from 'vue-uuid'; // uuid object is also exported to things
// outside Vue instance.
export default {
name: 'Login',
components: { Identify },
data() {
const validateUsername = (rule, value, callback) => {
if (!validUsername(value)) {
callback(new Error('请输⼊正确的⽤户名'))
} else {
callback()
}
}
const validatePassword = (rule, value, callback) => {
if (value.length < 6) {
callback(new Error('密码最少6位'))
} else {
callback()
}
}
return {
loginForm: {
username: 'admin',
password: '111111',
roomId: '',
verifyCode: ''
},
loginRules: {
username: [{ required: true, trigger: 'blur', validator: validateUsername }],
password: [{ required: true, trigger: 'blur', validator: validatePassword }]
},
passwordType: 'password',
capsTooltip: false,
loading: false,
showDialog: false,
redirect: undefined,
otherQuery: {},
identifyCodes: '1234567890',
identifyCode: '',
// verifyImageRoomId: '',
verifyImageUrl: '',
}
},
watch: {
$route: {
handler: function (route) {
const query = route.query
if (query) {
}
},
immediate: true
}
},
created() {
// window.addEventListener('storage', this.afterQRScan)
// this.identifyCode = ''
// this.makeCode(this.identifyCodes, 4)
},
mounted() {
if (this.loginForm.username === '') {
this.$refs.username.focus()
} else if (this.loginForm.password === '') {
this.$refs.password.focus()
}
},
destroyed() {
// veEventListener('storage', this.afterQRScan)
},
methods: {
checkCapslock(e) {
const { key } = e
this.capsTooltip = key && key.length === 1 && (key >= 'A' && key <= 'Z')
},
showPwd() {
if (this.passwordType === 'password') {
this.passwordType = ''
} else {
this.passwordType = 'password'
}
this.$nextTick(() => {
this.$refs.password.focus()
})
},
createUuid() {
let uuidV4 = uuid.v4().replace('-', '').replace('-', '').replace('-', '').replace('-', '')
this.verifyImageRoomId = uuidV4
this.verifyImageUrl = '/api/Operator/getCaptchaImage/120/40/' + this.verifyImageRoomId      console.log(uuidV4)
},
handleLogin() {
this.$refs.loginForm.validate(valid => {
if (valid) {
this.loading = true
this.$store.dispatch('user/login', this.loginForm)
.then(() => {
this.$router.push({ path: direct || '/', query: herQuery })
this.loading = false
})
.catch(() => {
this.loading = false
})
} else {
console.log('error submit!!')
return false
}
})
},
getOtherQuery(query) {
return Object.keys(query).reduce((acc, cur) => {
if (cur !== 'redirect') {
acc[cur] = query[cur]
}
return acc
}, {})
},
// ⽣成随机数
randomNum(min, max) {
return Math.floor(Math.random() * (max - min) + min)
},
// 切换验证码
refreshCode() {
let uuidV4 = uuid.v4().replace('-', '').replace('-', '').replace('-', '').replace('-', '')
Id = uuidV4
this.verifyImageUrl = '/api/Operator/getCaptchaImage/120/40/' + Id      console.log(uuidV4)
},
// ⽣成四位随机验证码
makeCode(o, l) {
for (let i = 0; i < l; i++) {
this.identifyCode += this.identifyCodes[
this.randomNum(0, this.identifyCodes.length)
]
}
console.log(this.identifyCode)
}
}
}
</script>
<style lang="scss">
/* 修复input 背景不协调和光标变⾊ */
/* Detail see github/PanJiaChen/vue-element-admin/pull/927 */ $bg: #283443;
$light_gray: #fff;
$cursor: #fff;
@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
.login-container .el-input input {
color: $cursor;
}
}
/* reset element-ui css */
.login-container {
background: url("~@/assets/background.jpg") no-repeat;
min-height: 100vh;
.el-input {
display: inline-block;
height: 47px;
width: 85%;
input {
background: transparent;
border: 0px;
-webkit-appearance: none;
border-radius: 0px;
padding: 12px 5px 12px 15px;
color: $light_gray;
height: 47px;
caret-color: $cursor;
&:-webkit-autofill {
box-shadow: 0 0 0px 1000px $bg inset !important;
-webkit-text-fill-color: $cursor !important;
}
}
}
.el-form-item {
border: 1px solid rgba(255, 255, 255, 0.1);
background: rgba(0, 0, 0, 0.1);
border-radius: 5px;
color: #454545;
.el-form-item__error {
color: rgb(223, 223, 176);
}
}
}
</style>
<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;
.login-container {
min-height: 100%;
width: 100%;
background-color: $bg;
overflow: hidden;
.login-form {
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
margin: auto;
width: 520px;
max-width: 100%;
padding: 160px 35px 0;
margin: 0 auto;
overflow: hidden;
}
.tips {
font-size: 14px;
color: #fff;
margin-bottom: 10px;
span {
&:first-of-type {
margin-right: 16px;
}
}
}
.svg-container {
padding: 6px 5px 6px 15px;
color: $dark_gray;
vertical-align: middle;
width: 30px;
display: inline-block;
}
.title-container {
position: relative;
.
title {
font-size: 42px;
color: $light_gray;
margin: 0px auto 40px auto;
text-align: center;
font-weight: bold;
}
}
.show-pwd {
position: absolute;
right: 10px;
top: 7px;
font-size: 16px;
color: $dark_gray;
cursor: pointer;
user-select: none;
}
.identifyCode {
position: absolute;
right: 10px;
top: 5px;
}
.
thirdparty-button {
position: absolute;
right: 0;
bottom: 6px;
}
@media only screen and (max-width: 470px) {
.thirdparty-button {
display: none;
}
}
}
</style>
后端接⼝
/// <summary>
/// 获取验证码
/// </summary>
/// <returns></returns>
[HttpGet("getCaptchaImage/{width:int}/{height:int}/{roomId}")]

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