Node.js

Extract a Single ZIP Entry While Preserving Its Stored Path

See more Zip Examples

This example demonstrates how to use the ZipEntry.Extract method to extract a single entry from a ZIP archive.

The example first creates a ZIP archive containing a text file. It then re-opens the ZIP, finds the entry, and extracts it to a base directory.

The Extract method uses the relative path stored within the ZIP entry. Any required subdirectories are created automatically beneath the specified base directory.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    //  ------------------------------------------------------------
    //  First create a sample ZIP archive containing a small text file.

    var zip = new chilkat.Zip();

    success = zip.NewZip("c:/temp/sampleText.zip");
    if (success == false) {
        console.log(zip.LastErrorText);
        return;
    }

    //  Add a small text file from memory.
    success = zip.AddString("myApp/docs/hello.txt","Hello from a ZIP entry!","utf-8");
    if (success == false) {
        console.log(zip.LastErrorText);
        return;
    }

    //  Write the ZIP archive to disk and close it.
    success = zip.WriteZipAndClose();
    if (success == false) {
        console.log(zip.LastErrorText);
        return;
    }

    //  ------------------------------------------------------------
    //  Now open the ZIP archive we just created.

    var zip2 = new chilkat.Zip();

    success = zip2.OpenZip("c:/temp/sampleText.zip");
    if (success == false) {
        console.log(zip2.LastErrorText);
        return;
    }

    //  Find the entry by its stored ZIP path.
    var entry = new chilkat.ZipEntry();

    success = zip2.EntryOf("myApp/docs/hello.txt",entry);

    if (success == false) {
        console.log("Entry not found.");
        return;
    }

    //  Extract this single entry to the base directory:
    //  
    //      c:/temp/extracted
    //  
    //  Because the entry's stored path is:
    //  
    //      myApp/docs/hello.txt
    //  
    //  the file will be extracted to:
    //  
    //      qa_output/extracted/myApp/docs/hello.txt
    //  
    //  The required subdirectories are created automatically.
    success = entry.Extract("c:/temp/extracted");
    if (success == false) {
        console.log(entry.LastErrorText);
        return;
    }

    zip2.CloseZip();

    console.log("Entry extracted successfully.");

}

chilkatExample();