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+<template>
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+ <div class="break-point">
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+ <div class="gva-table-box">
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+ <el-divider content-position="left">大文件上传</el-divider>
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+ <form id="fromCont" method="post">
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+ <div class="fileUpload" @click="inputChange">
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+ 选择文件
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+ <input v-show="false" id="file" ref="FileInput" multiple="multiple" type="file" @change="choseFile">
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+ </div>
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+ </form>
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+ <el-button :disabled="limitFileSize" type="primary" size="small" class="uploadBtn" @click="getFile">上传文件</el-button>
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+ <div class="el-upload__tip">请上传不超过5MB的文件</div>
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+ <div class="list">
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+ <transition name="list" tag="p">
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+ <div v-if="file" class="list-item">
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+ <el-icon>
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+ <document />
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+ </el-icon>
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+ <span>{{ file.name }}</span>
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+ <span class="percentage">{{ percentage }}%</span>
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+ <el-progress :show-text="false" :text-inside="false" :stroke-width="2" :percentage="percentage" />
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+ </div>
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+ </transition>
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+ </div>
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+ <div class="tips">此版本为先行体验功能测试版,样式美化和性能优化正在进行中,上传切片文件和合成的完整文件分别再QMPlusserver目录的breakpointDir文件夹和fileDir文件夹</div>
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+ </div>
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+ </div>
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+
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+</template>
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+
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+<script setup>
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+import SparkMD5 from 'spark-md5'
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+import {
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+ findFile,
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+ breakpointContinueFinish,
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+ removeChunk,
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+ breakpointContinue
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+} from '@/api/breakpoint'
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+import { ref, watch } from 'vue'
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+import { ElMessage } from 'element-plus'
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+
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+const file = ref(null)
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+const fileMd5 = ref('')
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+const formDataList = ref([])
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+const waitUpLoad = ref([])
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+const waitNum = ref(NaN)
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+const limitFileSize = ref(false)
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+const percentage = ref(0)
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+const percentageFlage = ref(true)
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+
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+// 选中文件的函数
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+const choseFile = async(e) => {
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+ const fileR = new FileReader() // 创建一个reader用来读取文件流
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+ const fileInput = e.target.files[0] // 获取当前文件
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+ const maxSize = 5 * 1024 * 1024
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+ file.value = fileInput // file 丢全局方便后面用 可以改进为func传参形式
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+ percentage.value = 0
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+ if (file.value.size < maxSize) {
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+ fileR.readAsArrayBuffer(file.value) // 把文件读成ArrayBuffer 主要为了保持跟后端的流一致
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+ fileR.onload = async e => {
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+ // 读成arrayBuffer的回调 e 为方法自带参数 相当于 dom的e 流存在e.target.result 中
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+ const blob = e.target.result
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+ const spark = new SparkMD5.ArrayBuffer() // 创建md5制造工具 (md5用于检测文件一致性 这里不懂就打电话问我)
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+ spark.append(blob) // 文件流丢进工具
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+ fileMd5.value = spark.end() // 工具结束 产生一个a 总文件的md5
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+ const FileSliceCap = 1 * 1024 * 1024 // 分片字节数
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+ let start = 0 // 定义分片开始切的地方
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+ let end = 0 // 每片结束切的地方a
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+ let i = 0 // 第几片
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+ formDataList.value = [] // 分片存储的一个池子 丢全局
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+ while (end < file.value.size) {
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+ // 当结尾数字大于文件总size的时候 结束切片
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+ start = i * FileSliceCap // 计算每片开始位置
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+ end = (i + 1) * FileSliceCap // 计算每片结束位置
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+ var fileSlice = file.value.slice(start, end) // 开始切 file.slice 为 h5方法 对文件切片 参数为 起止字节数
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+ const formData = new window.FormData() // 创建FormData用于存储传给后端的信息
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+ formData.append('fileMd5', fileMd5.value) // 存储总文件的Md5 让后端知道自己是谁的切片
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+ formData.append('file', fileSlice) // 当前的切片
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+ formData.append('chunkNumber', i) // 当前是第几片
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+ formData.append('fileName', file.value.name) // 当前文件的文件名 用于后端文件切片的命名 formData.appen 为 formData对象添加参数的方法
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+ formDataList.value.push({ key: i, formData }) // 把当前切片信息 自己是第几片 存入我们方才准备好的池子
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+ i++
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+ }
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+ const params = {
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+ fileName: file.value.name,
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+ fileMd5: fileMd5.value,
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+ chunkTotal: formDataList.value.length
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+ }
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+ const res = await findFile(params)
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+ // 全部切完以后 发一个请求给后端 拉当前文件后台存储的切片信息 用于检测有多少上传成功的切片
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+ const finishList = res.data.file.ExaFileChunk // 上传成功的切片
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+ const IsFinish = res.data.file.IsFinish // 是否是同文件不同命 (文件md5相同 文件名不同 则默认是同一个文件但是不同文件名 此时后台数据库只需要拷贝一下数据库文件即可 不需要上传文件 即秒传功能)
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+ if (!IsFinish) {
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+ // 当是断点续传时候
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+ waitUpLoad.value = formDataList.value.filter(all => {
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+ return !(
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+ finishList &&
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+ finishList.some(fi => fi.FileChunkNumber === all.key)
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+ ) // 找出需要上传的切片
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+ })
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+ } else {
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+ waitUpLoad.value = [] // 秒传则没有需要上传的切片
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+ ElMessage.success('文件已秒传')
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+ }
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+ waitNum.value = waitUpLoad.value.length // 记录长度用于百分比展示
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+ console.log(waitNum.value)
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+ }
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+ } else {
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+ limitFileSize.value = true
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+ ElMessage('请上传小于5M文件')
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+ }
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+}
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+
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+const getFile = () => {
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+ // 确定按钮
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+ if (file.value === null) {
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+ ElMessage('请先上传文件')
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+ return
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+ }
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+ if (percentage.value === 100) {
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+ percentageFlage.value = false
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+ }
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+ sliceFile() // 上传切片
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+}
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+
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+const sliceFile = () => {
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+ waitUpLoad.value &&
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+ waitUpLoad.value.forEach(item => {
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+ // 需要上传的切片
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+ item.formData.append('chunkTotal', formDataList.value.length) // 切片总数携带给后台 总有用的
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+ const fileR = new FileReader() // 功能同上
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+ const fileF = item.formData.get('file')
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+ fileR.readAsArrayBuffer(fileF)
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+ fileR.onload = e => {
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+ const spark = new SparkMD5.ArrayBuffer()
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+ spark.append(e.target.result)
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+ item.formData.append('chunkMd5', spark.end()) // 获取当前切片md5 后端用于验证切片完整性
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+ upLoadFileSlice(item)
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+ }
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+ })
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+}
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+
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+watch(() => waitNum.value, () => { percentage.value = Math.floor(((formDataList.value.length - waitNum.value) / formDataList.value.length) * 100) })
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+
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+const upLoadFileSlice = async(item) => {
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+ // 切片上传
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+ const fileRe = await breakpointContinue(item.formData)
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+ if (fileRe.code !== 0) {
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+ return
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+ }
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+ waitNum.value-- // 百分数增加
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+ if (waitNum.value === 0) {
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+ // 切片传完以后 合成文件
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+ const params = {
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+ fileName: file.value.name,
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+ fileMd5: fileMd5.value
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+ }
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+ const res = await breakpointContinueFinish(params)
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+ if (res.code === 0) {
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+ // 合成文件过后 删除缓存切片
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+ const params = {
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+ fileName: file.value.name,
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+ fileMd5: fileMd5.value,
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+ filePath: res.data.filePath,
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+ }
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+ ElMessage.success('上传成功')
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+ await removeChunk(params)
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+ }
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+ }
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+}
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+
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+const FileInput = ref(null)
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+const inputChange = () => {
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+ FileInput.value.dispatchEvent(new MouseEvent('click'))
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+}
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+</script>
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+
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+<script>
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+
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+export default {
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+ name: 'BreakPoint'
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+}
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+</script>
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+
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+<style lang='scss' scoped>
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+h3 {
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+ margin: 40px 0 0;
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+}
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+ul {
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+ list-style-type: none;
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+ padding: 0;
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+}
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+li {
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+ display: inline-block;
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+ margin: 0 10px;
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+}
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+a {
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+ color: #42b983;
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+}
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+#fromCont{
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+ display: inline-block;
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+}
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+.fileUpload{
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+ padding: 3px 10px;
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+ font-size: 12px;
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+ height: 20px;
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+ line-height: 20px;
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+ position: relative;
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+ cursor: pointer;
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+ color: #000;
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+ border: 1px solid #c1c1c1;
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+ border-radius: 4px;
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+ overflow: hidden;
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+ display: inline-block;
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+ input{
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+ position: absolute;
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+ font-size: 100px;
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+ right: 0;
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+ top: 0;
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+ opacity: 0;
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+ cursor: pointer;
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+ }
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+}
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+ .fileName{
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+ display: inline-block;
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+ vertical-align: top;
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+ margin: 6px 15px 0 15px;
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+ }
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+ .uploadBtn{
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+ position: relative;
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+ top: -10px;
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+ margin-left: 15px;
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+ }
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+ .tips{
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+ margin-top: 30px;
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+ font-size: 14px;
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+ font-weight: 400;
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+ color: #606266;
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+ }
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+ .el-divider{
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+ margin: 0 0 30px 0;
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+ }
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+
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+ .list{
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+ margin-top:15px;
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+ }
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+ .list-item {
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+ display: block;
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+ margin-right: 10px;
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+ color: #606266;
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+ line-height: 25px;
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+ margin-bottom: 5px;
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+ width: 40%;
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+ .percentage{
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+ float: right;
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+ }
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+}
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+.list-enter-active, .list-leave-active {
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+ transition: all 1s;
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+}
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+.list-enter, .list-leave-to
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+/* .list-leave-active for below version 2.1.8 */ {
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+ opacity: 0;
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+ transform: translateY(-30px);
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+}
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+</style>
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