Classic ASP

Find ZIP Entries Matching a Wildcard Pattern Using EntryMatching

This example demonstrates how to use the EntryMatching method to find ZIP entries whose stored paths match a wildcard pattern.

The wildcard character * matches zero or more characters. The comparison is performed against the full stored path within the ZIP archive.

This method is useful for:

Finding files having a particular extension
Locating files within specific subdirectories
Searching ZIP archives without manually iterating through every entry

Suppose the ZIP archive contains:

docs/ docs/readme.txt docs/manual.pdf images/logo.png images/banner.jpg data/config/settings.json

Notice that the ZIP archive contains an explicit directory entry named docs/. ZIP archives may optionally contain separate directory entries in addition to file entries.

When searching with the pattern docs/*, the first matching entry could therefore be the directory entry docs/ rather than a file contained within that directory.

The example searches for:

The first .png file
The first entry beneath the docs directory
The first JSON file anywhere within the ZIP archive

Chilkat Classic ASP Downloads

Download Chilkat for Classic ASP

Classic ASP

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

success = 0

' Open an existing ZIP archive.
set zip = Server.CreateObject("Chilkat.Zip")

success = zip.OpenZip("example.zip")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( zip.LastErrorText) & "</pre>"
    Response.End
End If

set entry = Server.CreateObject("Chilkat.ZipEntry")

' ------------------------------------------------------------
' Find the first .png file in the ZIP archive.

success = zip.EntryMatching("*.png",entry)

If (success = 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "Found PNG file:") & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "  " & entry.FileName) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "") & "</pre>"
End If

' ------------------------------------------------------------
' Find the first entry beneath the docs directory.
' 
' Note: ZIP archives may optionally contain explicit directory
' entries such as "docs/" in addition to file entries.
' Therefore, the first matching entry could be the directory
' itself rather than a file contained within the directory.

success = zip.EntryMatching("docs/*",entry)

If (success = 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "First matching docs entry:") & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "  " & entry.FileName) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "  IsDirectory = " & entry.IsDirectory) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "") & "</pre>"
End If

' ------------------------------------------------------------
' Find the first JSON file anywhere in the ZIP archive.

success = zip.EntryMatching("*.json",entry)

If (success = 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "Found JSON file:") & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "  " & entry.FileName) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "") & "</pre>"
End If

' ------------------------------------------------------------
' The matching is performed against the full stored ZIP path.
' For example:
' 
'     docs/readme.txt
'     images/logo.png
'     data/config/settings.json
' 
' The wildcard '*' matches zero or more characters.

zip.CloseZip 

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

%>
</body>
</html>