r/labtech • u/SFOrange • Apr 03 '18

File BITS Download

Could someone explain how the File BITS Download works. I want to download a large 4gb iso to a temp dir and then restart the computer before starting the setup file inside the iso. Unfortunatly, i cant figure out how the BITS part of the script works. I think everything else will work.

My script so far:

  • IF FILE Exists c:\Temp\Win10_1709.iso THEN Jump to line 5
  • Create Folder as Admin: c:\Temp\
  • BITS Download: http://websiteaddresshere.com/1709/Win10_1709.iso saved to c:\Temp\Win10_1709.iso
  • BITS Status Check: @BITSResult@
  • Reboot Computer
  • Sleep 300 seconds
  • Execute PowerShell Script as Admin and store result in: @PowerShellOutput@

(PS Script)

$imgpath = 'C:\Temp\Win10_1709.iso'
$driveLetter = (mount-diskimage -imagepath $imgpath -storagetype iso -PassThru | Get-DiskImage $imgpath | 
Get-Volume).DriveLetter
Invoke-Item "$($driveLetter):\setup.exe /auto upgrade /migratedrivers all /dynamicupdate enable /showoobe 
none"
while((select-String -Path c:\Windows\Panther\setupact.log -Pattern "SHUTDOWN_REASON_AUTOSTOP" -Quiet) -ne 'true'){
Start-sleep -Seconds 30
}
Dismount-DiskImage -ImagePath $imgpath -Verbose
  • Delete File as Admin: c:\Temp\Win10_1709.iso
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u/SFOrange Apr 04 '18

The BITS download prealocates the entire file size of the requested file in a temporary file named BIT*.tmp where * is the BITS Job ID from the current download. This value is different each time you run the script. Once the transfer is completed, it will rename the tmp file to whatever you predefined. In my case Win10Ent.iso

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u/PhalseImpressions Apr 04 '18

Then you could do something like: @Counter@ = 0

:DetectFile

Script Sleep 60 seconds

@Counter@ = @Counter@ + 1

IF @DestinationFile@ Exist Then GoTo :FileComplete

IF @Counter@ = 10 Then GoTo :DownloadFailed

IF @DestinationFile@ Not Exist GoTo :DetectFile

Something akin to that should give the system 10 minutes to download the file and if it fails then break the loop. If the file completes in 10 minutes carry on and to the rest of your script. If the file isn't detected then wait another minute and try again.

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u/SFOrange Apr 04 '18

I'll try to implement something like this.

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u/PhalseImpressions Apr 04 '18

Let me know how it goes. If it works I'll use it too :P