Node.js

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>

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    var xml = new chilkat.Xml();

    // The sample input XML is available at http://www.chilkatsoft.com/data/compress2.xml
    success = xml.LoadXmlFile("compress2.xml");
    if (success !== true) {
        console.log(xml.LastErrorText);
        return;
    }

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

    // Examine the new XML document:
    console.log(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:
    success = xml.UnzipTree();
    console.log(xml.GetXml());

}

chilkatExample();