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slice-upload-utils

v0.0.29

Published

A library for slice upload file and download.

Downloads

27

Readme

slice-upload-utils

NPM version

介绍

  • 本工具包含上传和下载功能。vite + vue的实现。

    上传

    • 包括切片上传,秒传,断点续传,暂停、取消。

    下载

    • 切片下载,合并,暂停、取消。

    上传hash计算

    • 为了优化计算hash时间,hash值计算分两种,一直是计算文件的真实MD5,一种是计算自定义hash值。

      自定义hash值:

      :: preHash,采用抽样hash算法,截取file前段、中间和末段合成一个新的文件,和file.size一起计算的一个新的hash值。

      :: chunkHash,采用preHash结合chunkSize和该切片的index计算hash值。

      真实hash值:

      :: preHash, file文件的hash值,file的真实MD5值计算,在file.size大于chunkSize时,通过计算chunk的~~web worker~~线程里面同时计算。

      :: chunkHash, file.size 小于chunkSize时,file等于chunkchunkHash等于preHashfile.size大于chunkSize时在~~web worker~~(vite 打包后,npm i 安装使用路径会出问题,故改成直接使用promise)里面计算。

    • 可以根据实例中的isPreHashisChunkHash的值来判断当前是否计算的真实hash。

快速开始

  • 使用 pnpm 安装
pnpm add file-slice-upload

示例代码

上传

/playground/vue/src/example/Upload.vue

下载

/playground/vue/src/example/Download.vue

下载文件后端代码

koa-download-demo

  • 具体效果可以把代码仓库clone下来,pnpm dev一下。

调用说明

上传

export interface UseSliceUploadOptions {
  /**
   * 上传文件
   */
  file: Ref<File | null | undefined>
  /**
   * 上传请求函数
   */
  request: UploadRequest
  /**
   * 报错处理函数
   */
  onError?: UploadEventType['error']
  /**
   * 上传完成函数
   */
  onFinish?: UploadEventType['finish']
  /**
   * 预检函数
   */
  preVerifyRequest?: PreVerifyUploadRequest
  /**
   * 分片大小
   * @default 1024 * 1024 * 2
   */
  chunkSize?: number
  /**
   * 并发上传数
   * @default 3
   */
  poolCount?: number
  /**
   * 请求失败后,重试次数
   * @default 3
   */
  retryCount?: number
  /**
   * 请求失败后,重试间隔时间
   * @default 300
   */
  retryDelay?: number
  /**
   * 请求超时时间(15s)
   * @default 15000
   */
  timeout?: number
  /**
   * 计算整个文件的hash,开启后比较耗时间
   * @default false
   */
  realPreHash?: boolean
  /**
   * 计算分片文件的hash,开启后比较耗时间
   * @default false
   */
  realChunkHash?: boolean
}

下载

export interface UseSliceDownloadOptions {
  fileSize?: number
  filename?: string
  /**
   * 文件MIME类型
   * @default application/octet-stream
   * @see https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types
   */
  fileType?: string
  /**
   * 是否自动保存
   * @default true
   */
  autoSave?: boolean
  /**
   * 分片大小
   * @default 1024 * 1024 * 2
   */
  chunkSize?: number
  /**
   * 并发上传数
   * @default 3
   */
  poolCount?: number
  /**
     * 请求失败后,重试次数
     * @default 3
     */
  retryCount?: number
  /**
     * 请求失败后,重试间隔时间
     * @default 300
     */
  retryDelay?: number
  /**
     * 请求超时时间(15s)
     * @default 15000
     */
  timeout?: number
  /**
   * 上传请求函数
   */
  request: DownloadRequest
  /**
   * 报错处理函数
   */
  onError?: DownloadEventType['error']
  /**
   * 预检函数
   */
  onFinish?: DownloadEventType['finish']
}

License

MIT License © 2023 Ywenhao