import React, {Component} from 'react'
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import PropTypes from 'prop-types'
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import { fromJS } from 'immutable'
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import moment from 'moment'
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import { Upload, Button, Icon, Progress, notification } from 'antd'
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import SparkMD5 from 'spark-md5'
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import Api from '@/api'
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import './index.scss'
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let service = ''
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if (process.env.NODE_ENV === 'production') {
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service = document.location.origin + '/' + window.GLOB.service
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} else {
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service = window.GLOB.location + '/' + window.GLOB.service
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}
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class FileUpload extends Component {
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static propTpyes = {
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value: PropTypes.array, // 文件数组
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accept: PropTypes.any, // 文件格式
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maxFile: PropTypes.any, // 最大文件数
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fileType: PropTypes.string // 文件显示类型
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}
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state = {
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percent: 0,
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showprogress: false,
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filelist: []
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}
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UNSAFE_componentWillMount () {
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const { value } = this.props
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if (!value) return
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this.setState({filelist: fromJS(value).toJS()})
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}
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onChange = ({ fileList }) => {
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fileList = fileList.map(item => {
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if (item.status === 'error' && /^<!DOCTYPE html>/.test(item.response)) {
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item.response = ''
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}
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return item
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})
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this.setState({filelist: fileList})
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this.props.onChange(fileList)
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}
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onRemove = file => {
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const files = this.state.filelist.filter(v => v.uid !== file.uid)
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this.setState({filelist: files})
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this.props.onChange(files)
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}
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onUpdate = (url) => {
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let filelist = fromJS(this.state.filelist).toJS()
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if (filelist[filelist.length -1]) {
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filelist[filelist.length -1].status = 'done'
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filelist[filelist.length -1].response = url
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filelist[filelist.length -1].origin = false
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}
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this.setState({filelist})
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this.props.onChange(filelist)
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}
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onDelete = (msg) => {
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let filelist = this.state.filelist.map(item => {
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if (!item.url && !item.response && !item.status) {
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item.status = 'error'
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}
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return item
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})
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this.setState({filelist, showprogress: false})
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this.props.onChange(filelist)
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notification.warning({
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top: 92,
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message: msg || '文件上传失败！',
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duration: 5
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})
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}
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shardupload = (params) => {
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let param = params.chunks.shift()
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let form = new FormData()
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form.append('file', param.binary)
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form.append('fileMd5', params.file.fileMd5)
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form.append('shardingMd5', param.chunkMd5)
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form.append('baseDomain', service)
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form.append('rootPath', 'Content/images/upload/')
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form.append('fileName', params.file.fileName)
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form.append('fileExt', params.file.fileType)
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form.append('shardingCnt', param.chunks)
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form.append('shardingNo', param.chunk)
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// form.append('LoginUID', sessionStorage.getItem('LoginUID') || '')
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Api.getLargeFileUpload(form).then(res => {
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if (res.status) {
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if (params.chunks.length > 0) {
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this.setState({
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percent: Math.floor(100 * (param.chunk / param.chunks))
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})
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this.shardupload(params)
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} else {
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if (res.urlPath) {
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this.onUpdate(res.urlPath)
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} else {
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this.onDelete()
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}
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this.setState({
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percent: 100
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}, () => {
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setTimeout(() => {
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this.setState({
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showprogress: false,
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percent: 0
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})
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}, 200)
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})
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}
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} else {
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this.onDelete(res.message)
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}
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})
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}
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getuuid = () => {
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let uuid = []
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let _options = '0123456789abcdefghigklmnopqrstuv'
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for (let i = 0; i < 19; i++) {
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uuid.push(_options.substr(Math.floor(Math.random() * 0x20), 1))
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}
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uuid = uuid.join('')
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return uuid
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}
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beforeUpload = (file) => {
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const { accept } = this.props
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if (accept && file.name) {
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let types = accept.split(',')
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let pass = false
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types.forEach(type => {
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if (new RegExp(type + '$', 'ig').test(file.name)) {
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pass = true
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}
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})
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if (!pass) {
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notification.warning({
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top: 92,
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message: '文件格式错误！',
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duration: 5
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})
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return
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}
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}
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this.setState({
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showprogress: true,
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percent: 0
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})
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// 兼容性的处理
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let blobSlice = File.prototype.slice || File.prototype.mozSlice || File.prototype.webkitSlice
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let chunkSize = 1024 * 1024 * 2 // 切片每次2M
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let chunks = Math.ceil(file.size / chunkSize) // 切片总数
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let currentChunk = 0 // 当前上传的chunk
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let spark = new SparkMD5.ArrayBuffer() // 对arrayBuffer数据进行md5加密，产生一个md5字符串
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let chunkFileReader = new FileReader() // 用于计算出每个chunkMd5
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let totalFileReader = new FileReader() // 用于计算出总文件的fileMd5
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let params = {chunks: [], file: {}} // 用于上传所有分片的md5信息
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params.file.fileName = file.name.replace(/\.{1}[^.]*$/ig, '') // 文件名（去除后缀名）
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params.file.fileType = file.name.replace(/^.*\.{1}/ig, '') // 文件类型
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params.file.fileSize = file.size // 文件大小
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params.file.fileChunks = chunks // 记录所有chunks的长度
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if (!/^[A-Za-z0-9]+$/.test(params.file.fileName)) { // 文件名称含有英文及数字之外字符时，名称系统生成
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params.file.fileName = moment().format('YYYYMMDDHHmmss') + this.getuuid()
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}
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totalFileReader.readAsArrayBuffer(file)
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totalFileReader.onload = (e) => { // 对整个totalFile生成md5
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spark.append(e.target.result)
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params.file.fileMd5 = spark.end() // 计算整个文件的fileMd5
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let _param = new FormData()
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_param.append('fileMd5', params.file.fileMd5)
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Api.getFilePreUpload(_param).then(res => {
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if (res.status && res.urlPath) {
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this.onUpdate(res.urlPath)
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this.setState({
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percent: 100
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}, () => {
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setTimeout(() => {
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this.setState({
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showprogress: false,
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percent: 0
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})
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}, 200)
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})
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} else if (res.shardings && res.shardings.length > 0) {
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res.shardings.forEach(shard => {
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if (shard.shardingNo && parseInt(shard.shardingNo) > currentChunk) {
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currentChunk = parseInt(shard.shardingNo)
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}
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})
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loadNext()
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} else {
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loadNext()
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}
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})
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}
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chunkFileReader.onload = (e) => {
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spark.append(e.target.result) // 对每一片分片进行md5加密
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params.chunks[params.chunks.length - 1].chunkMd5 = spark.end() // 添加切片md5
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currentChunk++ // 每一次分片onload,currentChunk都需要增加，以便来计算分片的次数
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if (currentChunk < chunks) { // 当前切片总数没有达到总数时
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loadNext()
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} else {
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this.shardupload(params)
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}
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}
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chunkFileReader.onerror = () => {
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this.onDelete()
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console.warn('File reading failed.')
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}
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totalFileReader.onerror = () => {
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this.onDelete()
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}
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let loadNext = () => {
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let start = currentChunk * chunkSize // 计算分片的起始位置
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let end = Math.min(file.size, start + chunkSize) // 计算分片的结束位置
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let obj = { // 每一个分片需要包含的信息
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chunk: currentChunk + 1,
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binary: file.slice(start, end),
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start: start,
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end: end,
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chunks
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}
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params.chunks.push(obj)
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chunkFileReader.readAsArrayBuffer(blobSlice.call(file, start, end))
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}
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return false
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}
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/**
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* @description 组件销毁，清除state更新
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*/
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componentWillUnmount () {
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this.setState = () => {
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return
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}
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}
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render() {
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const { maxFile, fileType, accept } = this.props
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const { showprogress, percent, filelist } = this.state
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let uploadable = 'fileupload-form-container '
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if (maxFile && maxFile > 0 && filelist.length >= maxFile) {
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uploadable += 'limit-fileupload'
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}
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const props = {
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name: 'file',
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disabled: showprogress,
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listType: fileType,
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fileList: filelist,
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action: null,
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accept: accept || '',
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method: 'post',
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multiple: false,
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onChange: this.onChange,
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onRemove: this.onRemove,
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beforeUpload: this.beforeUpload,
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className: uploadable
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}
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return (
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<Upload {...props}>
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{fileType !== 'picture-card' ? <Button>
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<Icon type="upload" /> 点击上传
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</Button> : null}
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{fileType === 'picture-card' ? <span style={{whiteSpace: 'nowrap'}}>
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<Icon type="upload" /> 点击上传
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</span> : null}
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{showprogress ? <Progress percent={percent} size="small" /> : null}
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</Upload>
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)
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}
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}
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export default FileUpload
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