Dart Requires Chilkat v11.0.0+

Compress String Feed to Base64

See more Compression Examples

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed data in base64. Dart

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.

  final sbCompressedBase64 = CkStringBuilder();

  final compress = CkCompression();
  compress.algorithm = 'deflate';
  compress.charset = 'utf-8';
  compress.encodingMode = 'base64';

  compress.firstChunk = true;
  compress.lastChunk = false;

  final bdCompressed = CkBinData();
  final sbUncompressedChunk = CkStringBuilder();

  for (var i = 0; i <= 24; i++) {
    if (i == 24) {
      compress.lastChunk = true;
    }

    sbUncompressedChunk.clear();
    sbUncompressedChunk.appendInt(i);
    sbUncompressedChunk.append(': This is a line of data to be compressed...\r\n');

    compress.compressSb(sbUncompressedChunk, bdCompressed);

    compress.firstChunk = false;
  }

  print('The base64 encoded compressed text:');
  print(bdCompressed.getEncoded('base64'));

  // Decompress in one call:
  final originalText = compress.decompressStringENC(bdCompressed.getEncoded('base64'));
  print(originalText);
}