tedsign vue3 web-端框架中封装一个验证码组件以及对应node 接口逻辑说明

一个这样的组件

我直接上代码了

<template><t-loading size="small" :loading="loading" show-overlay><div class="container" @click="refresh"><div v-if="svg" class="svg" v-html="svg" /><img v-else class="base64" :src="base64" alt="" /></div></t-loading>
</template>
<script lang="ts" setup>
import { MessagePlugin } from 'tdesign-vue-next';
import { onMounted, ref } from 'vue';import { getCaptcha } from '@/api/login';const emit = defineEmits(['update:modelValue', 'change']);
// base64
const base64 = ref('');
// svg2
const svg = ref('');
const loading = ref(false)async function refresh() {loading.value = trueawait getCaptcha({ height: 40,width: 150,}).then(({ captchaId, data }) => {if (data.includes(';base64,')) {base64.value = data;} else {svg.value = data;}emit('update:modelValue', captchaId);emit('change', {base64,svg,captchaId,});}).catch((err) => {MessagePlugin.error(err.message);}).finally(()=>{loading.value = false});
}onMounted(() => {refresh();
});defineExpose({refresh,
});
</script>
<style lang="less" scoped>
.container {height: 40px;width: 150px;cursor: pointer;.svg {height: 100%;position: relative;}.base64 {height: 100%;}
}
</style>

组件的使用

  <t-form-item class="captcha-code" name="captchaCode"><t-input v-model="formData.captchaCode" size="large" placeholder="请输入验证码" /><t-button size="large"><template #content><captcharef="captchaRef"v-model="formData.captchaId"@change="() => {formData.captchaCode = '';}"></captcha></template></t-button></t-form-item>

顺便在这里提一下我这对接的是node 的接口验证码是后端返回的svg 我把验证码svg 后端逻辑也说一下啊

import * as svgCaptcha from 'svg-captcha';
import * as svgToDataURL from 'mini-svg-data-uri';
这里用到了两个插件

  /*** 验证码* @param type 图片验证码类型 svg* @param width 宽* @param height 高*/async captcha(type: string, width = 150, height = 50) {const svg = svgCaptcha.create({ignoreChars: 'qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM',width,height,});const result = {captchaId: uuid(),data: svg.data.replace(/"/g, "'"),};// 文字变白const rpList = ['#111','#222','#333','#444','#555','#666','#777','#888','#999',];rpList.forEach(rp => {result.data = result.data['replaceAll'](rp, '#fff');});if (type === 'base64') {result.data = svgToDataURL(result.data);}// 半小时过期await this.cacheManager.set(`verify:img:${result.captchaId}`,svg.text.toLowerCase(),{ ttl: 1800 });return result;}

以上的node 的service 接口的逻辑