Dart

Compress XML Tree

See more XML Examples

Demonstrates how to compress and restore the entire subtree rooted at an XML node.

The input XML, available at http://www.chilkatsoft.com/data/compress2.xml, is this:

<root>
    <lazydog>
        <fox>The quick brown fox jumps over the lazy dog</fox>
    </lazydog>
    <fox>The quick brown fox jumps over the lazy dog</fox>
    <child>
        <grandchild>The quick brown fox jumps over the lazy dog</grandchild>
    </child>
    <child>
        <grandchild>The quick brown fox jumps over the lazy dog</grandchild>
    </child>
</root>

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final xml = CkXml();

  // The sample input XML is available at http://www.chilkatsoft.com/data/compress2.xml
  try {
    xml.loadXmlFile('compress2.xml');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Zip compress the root node's entire subtree:
  xml.zipTree();

  // Examine the new XML document:
  print(xml.getXml());

  // This is the XML w/ the compressed subtree in Base64 encoded format:

  // <root><![CDATA[4+WyKcrPL7Hj5VIAApucxKrKlPx0KBcslJZfYReSkapQWJqZnK2QVJRfnqcAFFPIKs0tKFbIL0st
  // UigBSoN0KgC12uiDNECN00c1jyKzkjMyc1KQHZZelJiXAhElyUwkfTBnovDoYZGNPjTUAQ==
  // ]]></root>

  // Now uncompress and show that the original subtree was restored:
  xml.unzipTree();
  print(xml.getXml());
}