快捷導(dǎo)航

Vue Element UI + OSS實(shí)現(xiàn)上傳文件功能

更新時(shí)間：2019年07月31日 15:14:21 作者：A_山水子農(nóng)

這篇文章主要為大家詳細(xì)介紹了Vue Element UI + OSS實(shí)現(xiàn)上傳文件功能，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

Element提供了upload上傳組件，可以查看官網(wǎng)upload組件的詳細(xì)介紹；查看upload組件的上傳源碼upload/ajax，使用的是XHR對(duì)象上傳文件。在項(xiàng)目實(shí)踐中，發(fā)現(xiàn)該上傳方法上傳大文件時(shí)會(huì)出現(xiàn)問(wèn)題，所以決定使用阿里云對(duì)象存儲(chǔ)服務(wù)（Object Storage Service，簡(jiǎn)稱OSS），OSS詳細(xì)介紹可以查看官網(wǎng)，本文主要講解的是OSS上傳文件的前端，后臺(tái)開發(fā)請(qǐng)查看官網(wǎng)介紹，SDK Browser.js講解了前端如何進(jìn)行上傳。

1、使用npm安裝SDK的開發(fā)包：

npm install ali-oss

2、OSS配置

let OSS = require('ali-oss');
let client= new OSS.Wrapper({
 accessKeyId: 'your access key',
 accessKeySecret: 'your access secret',
 bucket: 'your bucket name',
 region: 'oss-cn-hangzhou'
});

最新版的沒(méi)有了Wrapper構(gòu)造函數(shù)，直接配置

let oss = require('ali-oss');
var client = oss({
 accessKeyId: 'your access key',
 accessKeySecret: 'your access secret',
 bucket: 'your bucket name',
 region: 'oss-cn-hangzhou'
});

3、上傳文件

OSS上傳文件分為上傳Buffer內(nèi)容、上傳blob數(shù)據(jù)、分片上傳，此處展示分片上傳

let result = await client.multipartUpload('object-key', 'local-file', {
 progress: async function (p) {
 console.log('Progress: ' + p);
 }
 });

js調(diào)用OSS上傳文件已經(jīng)沒(méi)有問(wèn)題，但是我們需要實(shí)現(xiàn)公用上傳組件，Element UI已經(jīng)實(shí)現(xiàn)了Upload上傳組件，包括上傳進(jìn)度、異常處理、拖拽等；那我們還有必要重新開發(fā)一個(gè)像Upload一樣的組件嗎？通過(guò)查看Upload組件的API發(fā)現(xiàn)有一個(gè)http-request屬性，http-request覆蓋默認(rèn)的上傳行為，可以自定義上傳的實(shí)現(xiàn)；看到這個(gè)我就省了很多事，直接用OSS上傳覆蓋XHR上傳。代碼如下：

<template>
 <div>
 <el-upload
 :auto-upload="false"
 :action="uploadUrl"
 ref="upload"
 :before-upload="fnBeforeUpload"
 :on-success="fnUploadSuccess"
 :on-exceed="fnUploadExceed"
 :data="data_extra"
 :headers="uploadHeaders"
 :http-request="fnUploadRequest"
 drag
 :limit="files"
 :disabled="disabled"
 multiple>
 <i class="el-icon-upload"></i>
 <div class="el-upload__text">將文件拖到此處，或<em>點(diǎn)擊上傳</em></div>
 <div slot="tip" class="el-upload__tip">上傳文件大小不能超過(guò) 1G</div>
 </el-upload>
 </div>
</template>
<script>
import UploadFileApi from '@/api/system/UploadFileApi'
import * as util from 'utils/common'
import OSS from 'ali-oss'
export default {
 name: 'fileUpload',
 props: {
 data_extra: {
 type: Object,
 required: true
 },
 accept: {
 type: Array,
 required: true
 }
 },
 data () {
 return {
 uploadUrl: '',
 uploadFileLength: 0,
 uploadFileSuccess: 0,
 uploadFileNames: [],
 uploadFileName: [],
 fileList: [],
 files: 10,
 uploadHeaders: {
 authorization: ''
 },
 disabled: false
 }
 },
 methods: {
 /**
 * @description [fnUploadRequest 覆蓋默認(rèn)的上傳行為，實(shí)現(xiàn)自定義上傳]
 * @author shanshuizinong
 * @param {object} option [上傳選項(xiàng)]
 * @return {null} [沒(méi)有返回]
 */
 async fnUploadRequest (option) {
 try {
 let vm = this
 vm.disabled = true
 // 獲取OSS配置信息
 let uploadFileApi = new UploadFileApi()
 let ret = await uploadFileApi.fileOssParams()
 if (!(ret.data && ret.data.code === '0' && ret.data.data)) {
  throw new Error('獲取OSS參數(shù)失敗')
 }
 let ossData = JSON.parse(ret.data.data)
 let relativePath = ossData.relativePath
 let client = new OSS.Wrapper({
  policy: ossData.policy,
  accessKeyId: ossData.accessid,
  accessKeySecret: ossData.accesssecret,
  bucket: ossData.bucket,
  signature: ossData.signature
 })
 let file = option.file
 const point = file.name.lastIndexOf('.')
 let suffix = file.name.substr(point)
 let fileName = file.name.substr(0, point)
 let date = vm.$moment().format('YYYYMMDDHHmm')
 let fileNames = `${fileName}_${date}${suffix}`
 // 分片上傳文件
 ret = await client.multipartUpload(relativePath + fileNames, file, {
  progress: async function (p) {
  let e = {}
  e.percent = p * 100
  option.onProgress(e)
  }
 })
 console.log(ret)
 if (ret.res.statusCode === 200) {
  // option.onSuccess(ret)
  return ret
 } else {
  vm.disabled = false
  option.onError('上傳失敗')
 }
 } catch (error) {
 console.error(error)
 this.disabled = false
 option.onError('上傳失敗')
 this.$error(error.message)
 }
 },
 /**
 * @description [fnUploadSuccess 文件上傳成功的函數(shù)]
 * @author shanshuizinong
 * @return {null} [沒(méi)有返回]
 */
 async fnUploadSuccess () {
 // TODO
 }
 }
}
</script>

查看upload源碼upload.vue知道httpRequest會(huì)有一個(gè)文件上傳的option選項(xiàng)作為參數(shù)，upload/ajax源碼中上傳進(jìn)度、上傳成功、上傳失敗都是通過(guò)option調(diào)用其方法進(jìn)行觸發(fā)。

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

您可能感興趣的文章: