(AutoIt) Unzip Binary File to Stream

Demonstrates how to unzip a large binary file to a stream to allow the application to process the uncompressed bytes chunk by chunk.

Note: This example requires Chilkat v9.5.0.67 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

; This requires the Chilkat Zip API to have been previously unlocked.
; See Unlock Chilkat Zip for sample code.

$oZip = ObjCreate("Chilkat.Zip")

; First open a .zip.
Local $bSuccess = $oZip.OpenZip("qa_data/zips/big.zip")
If ($bSuccess <> True) Then
    ConsoleWrite($oZip.LastErrorText & @CRLF)
    Exit
EndIf

; Get the entry to be unzipped to a stream..
Local $oEntry = $oZip.GetEntryByIndex(0)
If ($oZip.LastMethodSuccess <> True) Then
    ConsoleWrite($oZip.LastErrorText & @CRLF)
    Exit
EndIf

$oDataStream = ObjCreate("Chilkat.Stream")

Local $oUnzipTask = $oEntry.UnzipToStreamAsync($oDataStream)
If ($oEntry.LastMethodSuccess <> True) Then
    ConsoleWrite($oEntry.LastErrorText & @CRLF)

    Exit
EndIf

; Start the background unzip thread.
$oUnzipTask.Run()

; We'll read the uncompressed data chunk-by-chunk and write to an output file.
$oFac = ObjCreate("Chilkat.FileAccess")
$bSuccess = $oFac.OpenForWrite("qa_output/out.dat")
If ($bSuccess <> True) Then
    ConsoleWrite($oFac.LastErrorText & @CRLF)

    Exit
EndIf

; Read the stream.  (this is reading the unzipped file data)
$oBd = ObjCreate("Chilkat.BinData")
While $oDataStream.EndOfStream <> True
    ; Get the next chunk of decompressed bytes.
    $oDataStream.ReadBd($oBd)
    ; Do something with it..
    ; In this simple example, we'll just write to the file.
    $oFac.FileWriteBd($oBd,0,0)
    ; Clear for the next read.
    $oBd.Clear()
Wend

$oFac.FileClose 

ConsoleWrite("Success." & @CRLF)