Node.js

Decompress Gzip Data In-Place Using BinData

See more Gzip Examples

This example demonstrates how to use the UncompressBd method to decompress Gzip data stored in a BinData object.

The compressed .gz file is first loaded into memory. The UncompressBd method then decompresses the data in-place, meaning the original compressed bytes in the BinData object are replaced with the uncompressed data.

After decompression, the example writes the resulting data to a file. This approach is useful when working entirely in memory before saving or further processing the uncompressed data.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    // This example demonstrates how to decompress Gzip data stored in a BinData object.
    // The decompression is done in-place, replacing the compressed data with the original data.

    var gzip = new chilkat.Gzip();
    var bd = new chilkat.BinData();

    // Load a .gz file into BinData:
    success = bd.LoadFile("example.txt.gz");
    if (success == false) {
        console.log(bd.LastErrorText);
        return;
    }

    console.log("Compressed size (bytes): " + bd.NumBytes);

    // Uncompress the data in-place:
    success = gzip.UncompressBd(bd);
    if (success == false) {
        console.log(gzip.LastErrorText);
        return;
    }

    console.log("Decompressed size (bytes): " + bd.NumBytes);

    // Save the uncompressed data to a file:
    success = bd.WriteFile("example.txt");
    if (success == false) {
        console.log(bd.LastErrorText);
        return;
    }

    console.log("File successfully uncompressed to example.txt");

}

chilkatExample();