(Classic ASP) Find a ZIP Entry by Exact Path Using EntryOf

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This example demonstrates how to use the EntryOf method to find a ZIP entry whose stored path exactly matches a specified path.

Unlike EntryMatching, which performs wildcard matching, EntryOf performs an exact path lookup.

This method is useful when:

The exact ZIP path is already known
Retrieving a specific file or directory entry
Verifying whether a particular entry exists in the ZIP archive

Suppose the ZIP archive contains:

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

ZIP archives may optionally contain explicit directory entries such as docs/. These directory entries can also be retrieved using EntryOf.

The example:

Finds an exact file entry
Finds an exact directory entry
Demonstrates the difference between file and directory entries

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

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

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

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 a specific file entry by its exact ZIP path.

success = zip.EntryOf("docs/readme.txt",entry)

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

' ------------------------------------------------------------
' Find a directory entry.
' 
' ZIP archives may optionally contain explicit directory entries.
' In this example, "docs/" is a separate directory entry.

success = zip.EntryOf("docs/",entry)

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

' ------------------------------------------------------------
' Attempt to find a non-existent entry.

success = zip.EntryOf("images/missing.png",entry)

If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( "The entry images/missing.png was not found.") & "</pre>"
End If

zip.CloseZip 

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

%>
</body>
</html>