(Lianja) 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.

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

loZip = createobject("CkZip")

// The NewZip method only initializes the Zip object -- it does
// not create or write a .zip file.
llSuccess = loZip.NewZip("notUsed.zip")
if (llSuccess <> .T.) then
    ? loZip.LastErrorText
    release loZip
    return
endif

// 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.
llSaveExtraPath = .F.
llSuccess = loZip.AppendOneFileOrDir("something.dat",llSaveExtraPath)
if (llSuccess <> .T.) then
    ? loZip.LastErrorText
    release loZip
    return
endif

// 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.
llSuccess = loZip.QuickAppend("preExisting.zip")
if (llSuccess <> .T.) then
    ? loZip.LastErrorText
    release loZip
    return
endif

? "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


release loZip