(JavaScript) 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.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

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 CkGzip();
var bd = new CkBinData();

// 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");