(PowerBuilder) Append Files to Existing Zip w/out Rewriting Entire Zip

Demonstrates how to use the QuickAppend method to append files to an existing .zip archive. This method works by editing the existing .zip -- it does not rewrite or recompress the contents of the existing .zip. It is the fastest way to append additional files to a pre-existing large .zip archive. Note: The QuickAppend method is new and available in the pre-release downloads, or in official releases dated after 6-October-2007.

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

integer li_rc
oleobject loo_Zip
integer li_Success
integer li_SaveExtraPath

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loo_Zip = create oleobject
// Use "Chilkat_9_5_0.Zip" for versions of Chilkat < 10.0.0
li_rc = loo_Zip.ConnectToNewObject("Chilkat.Zip")
if li_rc < 0 then
    destroy loo_Zip
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// The NewZip method only initializes the Zip object -- it does
// not create or write a .zip file.
li_Success = loo_Zip.NewZip("notUsed.zip")
if li_Success <> 1 then
    Write-Debug loo_Zip.LastErrorText
    destroy loo_Zip
    return
end if

// Add a reference to a file.  This is the file that will
// be added to a pre-existing .zip archive.  
// Note: this does not read or compress the file contents --
// it simply adds a reference to the zip object.
li_SaveExtraPath = 0
li_Success = loo_Zip.AppendOneFileOrDir("something.dat",li_SaveExtraPath)
if li_Success <> 1 then
    Write-Debug loo_Zip.LastErrorText
    destroy loo_Zip
    return
end if

// Appends the contents of the zip object to the preExisting.zip
// zip archive.  preExisting.zip is opened, and the files
// referenced by this zip object are streamed in, compressed,
// and appended to the end of the archive.
li_Success = loo_Zip.QuickAppend("preExisting.zip")
if li_Success <> 1 then
    Write-Debug loo_Zip.LastErrorText
    destroy loo_Zip
    return
end if

Write-Debug "Success!"

// Note: Additional files, directory trees, or in-memory data
// can be appended by calling AppendOneFileOrDir, AppendFiles,
// AppendString, AppendData, etc. multiple times.
// Whatever files and/or in-memory data that are referenced by
// this zip object will be appended to preExisting.zip when
// QuickAppend is called


destroy loo_Zip