AHK - UrlDownloadToFile Interruption

This first script is an example of how to pause UrlDownloadToFile, or simply to execute other functions while still downloading. The second is an example of how to pause the download, then exit the script and delete the download file without finishing it. Differences in the second code are highlighted in red.

Size = 300 ; approximate size in bytes of final file

SetTimer, CheckStatus, 10
;Download File
URLDownloadToFile, http://www.autohotkey.com/download/AutoHotkey104706_Install.exe, _tmp_AutoHotkey104706_Install.exe
Return

;Check Status
CheckStatus:
   FileGetSize, FSize, _tmp_AutoHotkey104706_Install.exe
   If (FSize >= Size) {
      Critical ; Make so this thread can't interrupted
      SetTimer, CheckStatus, off ; Stop checking status
      FileRead, FileData, _tmp_AutoHotkey104706_Install.exe ; Read file
      MsgBox % "Done!`n" (ErrorLevel ? "Error: " ErrorLevel : "`n" FileData) ; Done!
      ; Demonstrates interruption of UrlDownloadToFile
      ; Size of file stays the same
      Loop, 1000 {
         FileGetSize, FSize, _tmp_AutoHotkey104706_Install.exe
         ToolTip, File Size (Paused): %FSize%
         Sleep, 10
      }
      ; Resume Download
      SetTimer, CheckStatus2, 10
   }
Return

CheckStatus2:
   FileGetSize, FSize, _tmp_AutoHotkey104706_Install.exe
   ToolTip, File Size (Resumed): %FSize%
Return

~Esc::
SetTimer, ExitApp, 10
Return

ExitApp:
ExitApp

Size = 300 ; approximate size in bytes of final file
OnExit, OnExit ; Execute "OnExit" label when exiting

SetTimer, CheckStatus, 10
;Download File
URLDownloadToFile, http://www.autohotkey.com/download/AutoHotkey104706_Install.exe, _tmp_AutoHotkey104706_Install.exe
Return

;Check Status
CheckStatus:
   FileGetSize, FSize, _tmp_AutoHotkey104706_Install.exe
   If (FSize >= Size) {
      Critical
      SetTimer, CheckStatus, off
      FileRead, FileData, _tmp_AutoHotkey104706_Install.exe
ToolTip, File Size: %FSize%
      MsgBox % "Done!`n" (ErrorLevel ? "Error: " ErrorLevel : "`n" FileData)
      FileDelete, _tmp_AutoHotkey104706_Install.exe
      ; Demonstrates interruption of UrlDownloadToFile
      ; Size of file stays the same
      Loop, 250 {
         FileGetSize, FSize, _tmp_AutoHotkey104706_Install.exe
         ToolTip, File Size (Paused): %FSize%
         Sleep, 10
      }
      ; Exit
      ExitApp
   }
Return

~Esc::
SetTimer, OnExit, 10
Return

OnExit:
   ; Create a batch file that will delete the download file and itself
   FileAppend, ping http://www.google.com`nDel "%A_ScriptDir%\_tmp_AutoHotkey104706_Install.exe"`n Del "del.bat", del.bat
   ; Wait for file to exist
   Loop {
      If (FileExist("del.bat"))
         break
   }
   ; Run file
   Run, del.bat, %A_ScriptDir%, HIDE
ExitApp

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