Xbase++

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. Xbase++

LOCAL nSuccess
LOCAL oZip
LOCAL nRecurse

nSuccess := 0

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

oZip := CreateObject("Chilkat.Zip")

//  The NewZip method only initializes the Zip object -- it does
//  not create or write a .zip file.
nSuccess := oZip:NewZip("notUsed.zip")
IF (nSuccess == 0)
    ? oZip:LastErrorText
    oZip:destroy()
    RETURN
ENDIF

//  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.
nRecurse := 1
nSuccess := oZip:AppendFiles("c:/temp/abc123/*", nRecurse)
IF (nSuccess == 0)
    ? oZip:LastErrorText
    oZip:destroy()
    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.
nSuccess := oZip:QuickAppend("preExisting.zip")
IF (nSuccess == 0)
    ? oZip:LastErrorText
    oZip:destroy()
    RETURN
ENDIF

? "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.

oZip:destroy()