- 校验文件格式
- 要有进度条提示
- 可以上传超大的视频文件（切片）
- 上传期间断网后，再次联网可以继续上传（断点续传）
- 上传过同一个文件后，再次上传直接提示上传完成（秒传）
- 文件格式校验
- 文件切片、md5计算
- 发起检查请求，把当前文件的hash发送给服务端，检查是否有相同hash的文件
- 上传进度计算
- 上传完成后通知后端合并切片
- 检查接收到的hash是否有相同的文件，并通知前端当前hash是否有未完成的上传
- 接收切片
- 合并所有切片
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