Element提供了upload上傳組件，可以查看官網upload組件的詳細介紹；查看upload組件的上傳源碼upload/ajax，使用的是XHR對象上傳文件。在項目實踐中，發現該上傳方法上傳大文件時會出現問題，所以決定使用阿里云對象存儲服務（Object Storage Service，簡稱OSS），OSS詳細介紹可以查看官網，本文主要講解的是OSS上傳文件的前端，后臺開發請查看官網介紹，SDK Browser.js講解了前端如何進行上傳。
1、使用npm安裝SDK的開發包：
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'});最新版的沒有了Wrapper構造函數，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內容、上傳blob數據、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調用OSS上傳文件已經沒有問題，但是我們需要實現公用上傳組件，Element UI已經實現了Upload上傳組件，包括上傳進度、異常處理、拖拽等；那我們還有必要重新開發一個像Upload一樣的組件嗎？通過查看Upload組件的API發現有一個http-request屬性，http-request覆蓋默認的上傳行為，可以自定義上傳的實現；看到這個我就省了很多事，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>點擊上傳</em></div> <div slot="tip" class="el-upload__tip">上傳文件大小不能超過 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 覆蓋默認的上傳行為，實現自定義上傳] * @author shanshuizinong * @param {object} option [上傳選項] * @return {null} [沒有返回] */ 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] * @author shanshuizinong * @return {null} [沒有返回] */ async fnUploadSuccess () { // TODO } }}</script>查看upload源碼upload.vue知道httpRequest會有一個文件上傳的option選項作為參數，upload/ajax源碼中上傳進度、上傳成功、上傳失敗都是通過option調用其方法進行觸發。
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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