(Node.js) 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.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

    var success = false;

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

    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 a specific file entry by its exact ZIP path.

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

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

    // ------------------------------------------------------------
    // 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 == true) {
        console.log("Found directory entry:");
        console.log("  FileName = " + entry.FileName);
        console.log("  IsDirectory = " + entry.IsDirectory);
        console.log("");
    }

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

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

    if (success == false) {
        console.log("The entry images/missing.png was not found.");
    }

    zip.CloseZip();

    console.log("Done.");

}

chilkatExample();