React Native

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.

React Native

import { BinData, Gzip } from '@chilkat/react-native'

async function chilkatExample() {
  // 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.

  const gzip = new Gzip();
  const bd = new BinData();

  // Load a .gz file into BinData:
  try {
    bd.loadFile('example.txt.gz');
  } catch {
    console.log(bd.lastErrorText);
    return;
  }

  console.log(`Compressed size (bytes): ${bd.numBytes}`);

  // Uncompress the data in-place:
  try {
    await gzip.uncompressBdAsync(bd);
  } catch {
    console.log(gzip.lastErrorText);
    return;
  }

  console.log(`Decompressed size (bytes): ${bd.numBytes}`);

  // Save the uncompressed data to a file:
  try {
    bd.writeFile('example.txt');
  } catch {
    console.log(bd.lastErrorText);
    return;
  }

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