VUE集成Cos腾讯图片服务器

安装 npm install --save cos-js-sdk-v5   spark-md5

<el-upload
  class="upload-demo"
  :file-list="newImages"
  :on-preview="handlePreview"
  :on-remove="handleRemove"
  :on-success="handleAvatarSuccess"
  :before-remove="beforeRemove"
  :before-upload="beforeAvatarUpload">
  <el-button size="small" type="primary">点击上传</el-button>
</el-upload>

import uploadFile from '../../util/uploadFile'
const bannerOptions = [{
  type: 'image/jpeg',
  size: 10
}, {
  type: 'image/png',
  size: 10
}]

beforeAvatarUpload (file) {
  let that = this
  //        console.log('before',that.imgList)
  // 显示loading动画
  this.imgUpdateImg = true
  let isJPG = false
  let isLt2M = false
  let fileSize = 0
  for (let option of bannerOptions) {
    if (option.type === file.type) {
      isJPG = true
      fileSize = option.size
      if (option.size > file.size / 1024 / 1024) {
        isLt2M = true
      }
    }
  }
  if (!isJPG) {
    that.$message.error('上传的图片只能是 jpg/png 格式')
    that.imgUpdateImg = false
  }
  if (!isLt2M) {
    that.$message.error('上传文件的大小不能超过 ' + fileSize + 'MB!')
    that.imgUpdateImg = false
  }
  this.selectFile(file)
  return isJPG && isLt2M
},

selectFile (event) {
  console.log(event)
 // console.log('selectFile', event.target.files[0].name)
  // 调用上传方法，传入选择的文件对象
  // this.uploadFile(event.target.files[0], () => {
  //       console.log('ckckckckckckckckckckk')
  // })
 // console.log('selectFile', event.target.files[0])
  uploadFile(event, (key) => {
    console.log(key)
    this.newImages.push(key)
    console.log(this.newImages)
  })

uploadFile.js 文件

import Vue from 'vue'
import SparkMD5 from 'spark-md5'
import { cosConfig }  from './config'
import COS  from 'cos-js-sdk-v5'

export default function(file,backtopage) {
  var key = ''
  Vue.prototype.uploadFile = uploadFile
  console.log('hhhhhhhhhhhhhhhhhhhhhhhhh')
  console.log(cosConfig)
  var cos = new COS({
    getAuthorization: function (params, callback) {//获取签名 必填参数
      // 方法二（适用于前端调试）
      var authorization = COS.getAuthorization({
        SecretId: cosConfig.SecretId,
        SecretKey: cosConfig.SecretKey,
        Method: params.Method,
        Key: params.Key
      });
      callback(authorization);
    }
  });
  console.log(cos)
  uploadFile(file, backtopage)
  // 将上传文件的方法挂载到vue的原型链上面
  // Vue.prototype.uploadFile = uploadFile

  var requestCallback = function (err, data) {
    console.log(err || data);
    if (err && err.error) {
      console.log(key)
     // wx.showModal({ title: '返回错误', content: '请求失败：' + err.error.Message + '；状态码：' + err.statusCode, showCancel: false });
    } else if (err) {
      console.log(key)
     // wx.showModal({ title: '请求出错', content: '请求出错：' + err + '；状态码：' + err.statusCode, showCancel: false });
    } else {
      console.log(key)
      backtopage(key)
    //  wx.showToast({ title: '上传成功', icon: 'success', duration: 3000 });
    }
  };

  function uploadFile (file, backtopage) {
    console.log('nnnnnnnnnnnnnnnnnnn')
    console.log(file)
    // 得到md5码
    getFileMD5(file, md5 => {
      console.log(file)
      // 存储文件的md5码
      file.md5 = md5
      console.log(file.md5)
      let subfix = file.name.substr(file.name.lastIndexOf('.'))
      key = file.md5 + subfix
      console.log(key)
      cos.headObject({
        Bucket: cosConfig.Bucket, /* 必须 */
        Region: cosConfig.Region,    /* 必须 */
        Key: key,               /* 必须 */
      }, function (err, data) {
        if (err != null) {
          console.log('wrong')
          console.log(err)
          cos.putObject({
            Bucket: cosConfig.Bucket,
            Region: cosConfig.Region,
            Key: key,
            Body: file,
            onProgress: function (info) {
              console.log(JSON.stringify(info));
            }
          }, requestCallback)
        } else if (data != null) {
          backtopage(key)
        }
      });
    })
  }

  // 获得文件md5
  function getFileMD5(file, callback) {
    //声明必要的变量
    var fileReader = new FileReader(),

      //文件每块分割2M，计算分割详情
      chunkSize = 2097152,
      chunks = Math.ceil(file.size / chunkSize),
      currentChunk = 0,

      //创建md5对象（基于SparkMD5）
      spark = new SparkMD5()

    //每块文件读取完毕之后的处理
    fileReader.onload = function(e) {
      //每块交由sparkMD5进行计算
      spark.appendBinary(e.target.result)
      currentChunk++

      //如果文件处理完成计算MD5，如果还有分片继续处理
      if (currentChunk < chunks) {
        loadNext()
      } else {
        callback(spark.end())
      }
    }

    //处理单片文件的上传
    function loadNext() {
      var start = currentChunk * chunkSize,
        end = start + chunkSize >= file.size ? file.size : start + chunkSize

      fileReader.readAsBinaryString(file.slice(start, end))
    }

    loadNext()

  }

}