VBScript

Get Compressed ZIP Entry Data as Base64 Using ZipEntry.CopyToBase64

See more Zip Examples

This example creates a small ZIP archive containing a text file added from memory, writes the ZIP to disk, re-opens it, and then uses ZipEntry.CopyToBase64 to retrieve the compressed data for the text file as a Base64-encoded string.

The Base64 string returned by CopyToBase64 represents the compressed bytes stored for the entry inside the ZIP archive. It is not the original uncompressed text data.

VBScript

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

' ------------------------------------------------------------
' First create a sample ZIP archive containing a small text file.

set zip = CreateObject("Chilkat.Zip")

success = zip.NewZip("c:/temp/sampleText.zip")
If (success = 0) Then
    outFile.WriteLine(zip.LastErrorText)
    WScript.Quit
End If

' Add a small text file from memory.
' The text is stored in the ZIP as "hello.txt".
success = zip.AddString("hello.txt","Hello from a ZIP entry!","utf-8")
If (success = 0) Then
    outFile.WriteLine(zip.LastErrorText)
    WScript.Quit
End If

' Write the ZIP archive to disk and close it.
success = zip.WriteZipAndClose()
If (success = 0) Then
    outFile.WriteLine(zip.LastErrorText)
    WScript.Quit
End If

' ------------------------------------------------------------
' Now open the ZIP archive we just created.

set zip2 = CreateObject("Chilkat.Zip")

success = zip2.OpenZip("c:/temp/sampleText.zip")
If (success = 0) Then
    outFile.WriteLine(zip2.LastErrorText)
    WScript.Quit
End If

' Get the text file entry.
set entry = CreateObject("Chilkat.ZipEntry")

success = zip2.EntryOf("hello.txt",entry)

If (success = 0) Then
    outFile.WriteLine("Entry not found.")
    WScript.Quit
End If

' Get the compressed ZIP entry data as Base64.
' 
' This is the compressed data stored inside the ZIP file,
' not the uncompressed text "Hello from a ZIP entry!".
b64 = entry.CopyToBase64()

outFile.WriteLine("Base64 compressed ZIP entry data:")
outFile.WriteLine(b64)

zip2.CloseZip 

outFile.WriteLine("Done.")

outFile.Close