Node.js

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

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    success = false;

    // Open an existing ZIP archive.
    var zip = new chilkat.Zip();

    success = zip.OpenZip("example.zip");
    if (success == false) {
        console.log(zip.LastErrorText);
        return;
    }

    var entry = new chilkat.ZipEntry();

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

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

    if (success == true) {
        console.log("Found PNG file:");
        console.log("  " + entry.FileName);
        console.log("");
    }

    // ------------------------------------------------------------
    // 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 == true) {
        console.log("First matching docs entry:");
        console.log("  " + entry.FileName);
        console.log("  IsDirectory = " + entry.IsDirectory);
        console.log("");
    }

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

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

    if (success == true) {
        console.log("Found JSON file:");
        console.log("  " + entry.FileName);
        console.log("");
    }

    // ------------------------------------------------------------
    // 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();

    console.log("Done.");

}

chilkatExample();