296 lines
8.7 KiB
Vue
296 lines
8.7 KiB
Vue
<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
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id="fromCont"
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method="post"
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>
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<div
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class="fileUpload"
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@click="inputChange"
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>
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选择文件
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<input
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v-show="false"
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id="file"
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ref="FileInput"
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multiple="multiple"
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type="file"
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@change="choseFile"
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>
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</div>
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</form>
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<el-button
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:disabled="limitFileSize"
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type="primary"
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class="uploadBtn"
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@click="getFile"
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>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
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name="list"
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tag="p"
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>
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<div
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v-if="file"
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class="list-item"
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>
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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
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:show-text="false"
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:text-inside="false"
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:stroke-width="2"
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:percentage="percentage"
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/>
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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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</template>
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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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defineOptions({
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name: 'BreakPoint'
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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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// 选中文件的函数
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const choseFile = async(e) => {
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// 点击选择文件后取消 直接return
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if (!e.target.files.length) {
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return
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}
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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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}
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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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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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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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watch(() => waitNum.value, () => { percentage.value = Math.floor(((formDataList.value.length - waitNum.value) / formDataList.value.length) * 100) })
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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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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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<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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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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.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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