253 lines
8.4 KiB
Vue
253 lines
8.4 KiB
Vue
<template>
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<div class="hello">
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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">
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选择文件<input @change="choseFile" id="file" multiple="multiple" type="file" />
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</div>
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</form>
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<el-button @click="getFile" :disabled="limitFileSize" type="primary" size="medium" class="uploadBtn">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-group name="list" tag="p">
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<div class="list-item" v-for="(item,i) in uploadList" :key="i" >
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<i class="el-icon-document"></i>
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<span>{{ item.name }}</span>
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<span v-if="file" class="percentage" >{{percentage}}%</span>
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<el-progress :show-text='false' :text-inside="false" :stroke-width="2" :percentage="percentage"></el-progress>
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</div>
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</transition-group>
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</div>
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<!-- <span
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v-if="this.file"
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>{{Math.floor(((this.formDataList.length-this.waitNum)/this.formDataList.length)*100)}}%</span> -->
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<h2 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</h2>
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</div>
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</template>
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<script>
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import SparkMD5 from 'spark-md5'
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import axios from 'axios'
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import {
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findFile,
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breakpointContinueFinish,
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removeChunk
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} from '@/api/breakpoint'
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export default {
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name: 'HelloWorld',
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data() {
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return {
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file: null,
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fileMd5: '',
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formDataList: [],
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waitUpLoad: [],
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waitNum: 0,
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limitFileSize: false,
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percentage:0,
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percentageFlage: true,
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customColor: '#409eff',
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uploadList:[]
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}
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},
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created(){
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},
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methods: {
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// 选中文件的函数
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async choseFile(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 file = e.target.files[0] // 获取当前文件
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const maxSize = 5*1024*1024
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this.file = file // file 丢全局方便后面用 可以改进为func传参形式
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if(file.size<maxSize){
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fileR.readAsArrayBuffer(file) // 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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let 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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this.fileMd5 = 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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this.formDataList = [] // 分片存储的一个池子 丢全局
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while (end < file.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 = this.file.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', this.fileMd5) // 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', this.file.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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this.formDataList.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: this.file.name,
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fileMd5: this.fileMd5,
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chunkTotal: this.formDataList.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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this.waitUpLoad = this.formDataList.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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this.waitUpLoad = [] // 秒传则没有需要上传的切片
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}
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this.waitNum = this.waitUpLoad.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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this.limitFileSize = true
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this.$message('请上传小于5M文件')
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}
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},
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getFile() {
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// 确定按钮
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if (this.file == null) {
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this.$message('请先上传文件')
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return
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}
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this.percentage = Math.floor(((this.formDataList.length-this.waitNum)/this.formDataList.length)*100)
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if(this.percentage == 100){
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this.percentageFlage = false
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}
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this.sliceFile() // 上传切片
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if(this.percentage == 100){
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this.uploadList.push(this.file)
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}
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},
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sliceFile() {
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this.waitUpLoad &&
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this.waitUpLoad.map(item => {
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//需要上传的切片
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item.formData.append('chunkTotal', this.formDataList.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 file = item.formData.get('file')
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fileR.readAsArrayBuffer(file)
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fileR.onload = e => {
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let 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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this.upLoadFileSlice(item)
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}
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})
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},
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async upLoadFileSlice(item) {
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// 切片上传
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await axios.post(process.env.VUE_APP_BASE_API+"/fileUploadAndDownload/breakpointContinue",item.formData)
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this.waitNum-- // 百分数增加
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if (this.waitNum == 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: this.file.name,
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fileMd5: this.fileMd5
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}
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const res = await breakpointContinueFinish(params)
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if (res.success) {
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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: this.file.name,
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fileMd5: this.fileMd5,
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filePath: res.data.filePath
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}
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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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}
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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: 4px 10px;
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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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.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> |