Classic ASP

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

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.

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Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

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

set zip = Server.CreateObject("Chilkat.Zip")

' The NewZip method only initializes the Zip object -- it does
' not create or write a .zip file.
success = zip.NewZip("notUsed.zip")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( zip.LastErrorText) & "</pre>"
    Response.End
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.
recurse = 1
success = zip.AppendFiles("c:/temp/abc123/*",recurse)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( zip.LastErrorText) & "</pre>"
    Response.End
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.
success = zip.QuickAppend("preExisting.zip")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( zip.LastErrorText) & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( "Success!") & "</pre>"

' 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

%>
</body>
</html>