(Classic ASP) Find ZIP Entries Matching a Wildcard Pattern Using EntryMatching

See more Zip Examples

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

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

<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>