PowerBuilder

Append Dir Tree to Existing Zip w/out Rewriting Entire Zip

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Demonstrates how to use the QuickAppend method to append a directory tree 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. PowerBuilder

integer li_rc
long li_Success
oleobject loo_Zip
long li_Recurse

li_Success = 0

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

loo_Zip = create oleobject
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 = 0 then
    Write-Debug loo_Zip.LastErrorText
    destroy loo_Zip
    return
end if

//  Add a references to all files in a directory tree.
//  Note: this does not read or compress the file contents --
//  it simply adds file references to the zip object.
li_Recurse = 1
li_Success = loo_Zip.AppendFiles("c:/temp/abc123/*",li_Recurse)
if li_Success = 0 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 = 0 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 AddFile, AppendFiles,
//  AddString, AddBd, AddSb, 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