(DataFlex) 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

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoZip
    Variant vEntry
    Handle hoEntry
    String sTemp1
    Boolean bTemp1

    Move False To iSuccess

    Move False To iSuccess

    // Open an existing ZIP archive.
    Get Create (RefClass(cComChilkatZip)) To hoZip
    If (Not(IsComObjectCreated(hoZip))) Begin
        Send CreateComObject of hoZip
    End

    Get ComOpenZip Of hoZip "example.zip" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoZip To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatZipEntry)) To hoEntry
    If (Not(IsComObjectCreated(hoEntry))) Begin
        Send CreateComObject of hoEntry
    End

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

    Get pvComObject of hoEntry to vEntry
    Get ComEntryMatching Of hoZip "*.png" vEntry To iSuccess

    If (iSuccess = True) Begin
        Showln "Found PNG file:"
        Get ComFileName Of hoEntry To sTemp1
        Showln "  " sTemp1
        Showln ""
    End

    // ------------------------------------------------------------
    // 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.

    Get pvComObject of hoEntry to vEntry
    Get ComEntryMatching Of hoZip "docs/*" vEntry To iSuccess

    If (iSuccess = True) Begin
        Showln "First matching docs entry:"
        Get ComFileName Of hoEntry To sTemp1
        Showln "  " sTemp1
        Get ComIsDirectory Of hoEntry To bTemp1
        Showln "  IsDirectory = " bTemp1
        Showln ""
    End

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

    Get pvComObject of hoEntry to vEntry
    Get ComEntryMatching Of hoZip "*.json" vEntry To iSuccess

    If (iSuccess = True) Begin
        Showln "Found JSON file:"
        Get ComFileName Of hoEntry To sTemp1
        Showln "  " sTemp1
        Showln ""
    End

    // ------------------------------------------------------------
    // 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.

    Send ComCloseZip To hoZip

    Showln "Done."


End_Procedure