Dart

Compress Bytes to Base64 (or any other encoding)

See more Compression Examples

Compresses bytes to base64 or any other encoding. Also decompress to return the original. Dart

import 'dart:typed_data';

import 'package:chilkat/chilkat.dart';

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

  // First create some binary data to compress.
  final binData = CkBinData();

  for (var i = 1; i <= 16; i++) {
    binData.appendEncoded('000102030405060708090A0B0C0D0E0F', 'hex');
  }

  final compress = CkCompression();
  compress.algorithm = 'deflate';
  compress.encodingMode = 'base64';

  var uncompressedBytes = Uint8List(0);
  uncompressedBytes = binData.getBinary();

  // Compress and return the compressed bytes in base64 format.
  final compressedBase64 = compress.compressBytesENC(uncompressedBytes);
  print('compressed and base64 encoded: $compressedBase64');

  // Compress and return in hex format:
  compress.encodingMode = 'hex';
  final compressedHex = compress.compressBytesENC(uncompressedBytes);
  print('compressed and hex encoded: $compressedHex');

  // Now decompress..
  final binData2 = CkBinData();

  // Decompress the base64..
  compress.encodingMode = 'base64';
  uncompressedBytes = compress.decompressBytesENC(compressedBase64);
  binData2.appendBinary(uncompressedBytes);
  // Show the uncompressed bytes in hex format:
  print(binData2.getEncoded('hex'));
  print('--');

  // Decompress the hex..
  compress.encodingMode = 'hex';
  uncompressedBytes = compress.decompressBytesENC(compressedHex);
  binData2.clear();
  binData2.appendBinary(uncompressedBytes);
  // Show the uncompressed bytes in hex format:
  print(binData2.getEncoded('hex'));
  print('--');
}