问题背景

最近上传视频的功能，突然炸了，两年没动的代码，突然不行辽，首次上传成功，后面继续上传就可以，但凡有一次上传失败，再上传文件就不行。

这里博主使用的是凭证上传方式哈。

凭证上传

官方文档：Web（JavaScript）上传SDK

查看了官方文档，确实是提到了，如使用1.5.3之前版本重新上传，请修改待上传文件名称，不要与上传中断的文件重名，避免报错。

项目使用的确实是1.5.0版本，所以我首先是把upload-sdk升级到了1.5.5

如果需要下载对应版本，可以看这里：Javascript上传SDK

upload-sdk升级之后，oss-sdk用的依然是6.8.0，这时候上传还是不行，首次上传可以成功，但是如果有重复名称的文件，再次上传，就会一直失败，报404

升级版本

询问了阿里云技术人员，被告知1.5.5对应的是6.17.1，所以又升级了oss-sdk。

更新了版本之后，如果是新文件，上传和续传没问题了，只是如果文件名字和之前的相同，上传会报403，续传会报404

这是缓存引起的，在new AliyunUpload.Vod({}) 的地方，新增个 localCheckpoint: true ，并且把本地存储清空，就可以了，或者也可以重命名文件。

代码

createUploader (i) {
        let self = this
        let uploader = new AliyunUpload.Vod({
          timeout: 60000,
          partSize: 1048576, // 分片大小默认1M，不能小于100K
          parallel: 5, // 并行上传分片个数，默认5
          retryCount: 3, // 网络原因失败时，重新上传次数，默认为3
          retryDuration: 2, // 网络原因失败时，重新上传间隔时间，默认为2秒
          region: "cn-shanghai", // 上传到点播的地域
          userId: "190917894512121",
          localCheckpoint: true,//此参数是禁用服务端缓存，不影响断点续传
          // 开始上传
	  // 如果是 UploadAuth 上传方式, 需要调用 uploader.setUploadAuthAndAddress 方法
          // 如果是 UploadAuth 上传方式, 需要根据 uploadInfo.videoId是否有值，调用点播的不同接口获取uploadauth和uploadAddress
	  // 如果 uploadInfo.videoId 有值，调用刷新视频上传凭证接口，否则调用创建视频上传凭证接口
	  // 如果 uploadInfo.videoId 存在, 调用 刷新视频上传凭证接口(https://help.aliyun.com/document_detail/55408.html)
          // 如果 uploadInfo.videoId 不存在,调用 获取视频上传地址和凭证接口(https://help.aliyun.com/document_detail/55407.html)
          onUploadstarted: function (uploadInfo) {
            if (!uploadInfo.videoId) {
              uploadVideoAuthApi(self.vedioData[i]).then((res) => {
                self.uploadDisabled = true
                let { uploadAuth, uploadAddress, videoId } = res.data.operateCallBackObj;
                uploader.setUploadAuthAndAddress(uploadInfo, uploadAuth, uploadAddress, videoId);
                uploader.startUpload()
              })
            } else {
	      // 如果videoId有值，根据videoId刷新上传凭证
              refreshUploadVideoAuthApi(uploadInfo.videoId).then(res => {
                let {uploadAuth, uploadAddress, videoId} = res.data.operateCallBackObj
                uploader.setUploadAuthAndAddress(uploadInfo, uploadAuth, uploadAddress, videoId)
                uploader.startUpload()
              })
            }
          },
          // 文件上传成功
          onUploadSucceed: function (uploadInfo) {
            console.log("onUploadSucceed: " + uploadInfo.file.name + ", endpoint:" + uploadInfo.endpoint + ", bucket:" + uploadInfo.bucket + ", object:" + uploadInfo.object)
            self.statusText = '文件上传成功!'
          },
          // 文件上传失败
          onUploadFailed: function (uploadInfo, code, message) {
            console.log("onUploadFailed: file:" + uploadInfo.file.name + ",code:" + code + ", message:" + message)
            self.statusText = '文件上传失败!'
          },
          // 取消文件上传
          onUploadCanceled: function (uploadInfo, code, message) {
            console.log("Canceled file: " + uploadInfo.file.name + ", code: " + code + ", message:" + message)
            self.statusText = '文件已暂停上传'
          },
          // 文件上传进度，单位：字节, 可以在这个函数中拿到上传进度并显示在页面上
          onUploadProgress: function (uploadInfo, totalSize, progress) {
            console.log("onUploadProgress:file:" + uploadInfo.file.name + ", fileSize:" + totalSize + ", percent:" + Math.ceil(progress * 100) + "%")
            let progressPercent = Math.ceil(progress * 100)
            self.authProgress = progressPercent
            self.statusText = '文件上传中...'
          },
          // 上传凭证超时
          onUploadTokenExpired: function (uploadInfo) {
            // 上传大文件超时, 如果是上传方式一即根据 UploadAuth 上传时
            // 需要根据 uploadInfo.videoId 调用刷新视频上传凭证接口(https://help.aliyun.com/document_detail/55408.html)重新获取 UploadAuth
            // 然后调用 resumeUploadWithAuth 方法, 这里是测试接口, 所以我直接获取了 UploadAuth
            let refreshUrl = 'https://demo-vod.cn-shanghai.aliyuncs.com/voddemo/RefreshUploadVideo?BusinessType=vodai&TerminalType=pc&DeviceModel=iPhone9,2&UUID=59ECA-4193-4695-94DD-7E1247288&AppVersion=1.0.0&Title=haha1&FileName=xxx.mp4&VideoId=' + uploadInfo.videoId
            axios.get(refreshUrl).then(({data}) => {
              let uploadAuth = data.UploadAuth
              uploader.resumeUploadWithAuth(uploadAuth)
              console.log('upload expired and resume upload with uploadauth ' + uploadAuth)
            })
            self.statusText = '文件超时...'
          },
          // 全部文件上传结束
          onUploadEnd: function (uploadInfo) {
            console.log("onUploadEnd: uploaded all the files")
            self.statusText = '文件上传完毕'
          }
        })
   return uploader
}