Dart

Compress Text from StringBuilder to Gzip (BinData Output)

See more Gzip Examples

This example demonstrates how to use the CompressSb method to compress text stored in a StringBuilder into Gzip format.

The text is first converted to its byte representation using the specified character set (in this case, UTF-8). These bytes are then compressed, and the resulting Gzip data is written to a BinData object in memory.

This approach is useful when working with dynamically generated text that you want to compress without first writing it to a file. The example also shows how the compressed data can optionally be saved to a .gz file.

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example demonstrates how to compress text contained in a StringBuilder
  // into Gzip format, storing the compressed result in a BinData object.

  final gzip = CkGzip();
  final sb = CkStringBuilder();
  final bd = CkBinData();

  // Add some text to the StringBuilder:
  sb.append('The quick brown fox jumps over the lazy dog.');

  // Compress the text using UTF-8 encoding:
  try {
    gzip.compressSb(sb, 'utf-8', bd);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // The BinData now contains the Gzip-compressed bytes.
  print('Compression successful.');
  print('Compressed size (bytes): ${bd.numBytes}');

  // (Optional) Save to a .gz file:
  try {
    bd.writeFile('text.gz');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Gzip file written to text.gz');
}