上传大于1G文件的hash校验有误

Description：

上传文件的hash校验有误，导致上传大于1G文件失败

在最新的master分支（commit 34c3bb8）中失败但在过去某个分支（commit e3ab8e2 ）中可以正常上传

Request && Error code：

:: { Error: append target fingerprint does not match
    at AppendHandler.run (/home/lxw/appifi/src/tasks/writedir.js:333:17)
    at <anonymous>
  status: 403,
  where: 
   { handler: 'AppendHandler',
     number: 1,
     name: 'Ubuntu-server.ova',
     filename: '{"size":379142656,"sha256":"ec390922d034f8d011469bba74a36761ad64861598eb3c161431f81d417e9e62","append":"2208cd7443bea5b6b0432194051282b3acb6240f21c8867c36baeb4192dc6244"}',
     value: undefined } }
POST /drives/499a0f8c-443c-4474-8b6b-d43b81946f14/dirs/499a0f8c-443c-4474-8b6b-d43b81946f14/entries 403 12747.582 ms - 322

wisnuc / appifi

上传大于1G文件的hash校验有误 #408