(Visual FoxPro) Compress XML Tree

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>

Download Chilkat XML ActiveX

LOCAL loXml
LOCAL lnSuccess

loXml = CreateObject('Chilkat.Xml')

*  The sample input XML is available at http://www.chilkatsoft.com/data/compress2.xml
lnSuccess = loXml.LoadXmlFile("compress2.xml")
IF (lnSuccess <> 1) THEN
    ? loXml.LastErrorText
    QUIT
ENDIF

*  Zip compress the root node's entire subtree:
loXml.ZipTree()

*  Examine the new XML document:
? loXml.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:
loXml.UnzipTree()
? loXml.GetXml()