DataFlex

Compress XML Content

See more XML Examples

Demonstrates how to compress the content of an XML node. Note: This does not compress the node's children, only the text content.

The input XML, available at http://www.chilkatsoft.com/data/compress1.xml, is this:

<root>
    <fox>This is content that will be compressed.
		0The quick brown fox jumps over the lazy dog
		1The quick brown fox jumps over the lazy dog
		2The quick brown fox jumps over the lazy dog
		3The quick brown fox jumps over the lazy dog
		4The quick brown fox jumps over the lazy dog
		5The quick brown fox jumps over the lazy dog
		6The quick brown fox jumps over the lazy dog
		7The quick brown fox jumps over the lazy dog
		8The quick brown fox jumps over the lazy dog
		9The quick brown fox jumps over the lazy dog
        <child1>
            <grandchild>This is not compressed.</grandchild>
        </child1>
    </fox>
</root>

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoXml
    String sTemp1

    Move False To iSuccess

    Get Create (RefClass(cComChilkatXml)) To hoXml
    If (Not(IsComObjectCreated(hoXml))) Begin
        Send CreateComObject of hoXml
    End

    // The sample input XML is available at http://www.chilkatsoft.com/data/compress1.xml
    Get ComLoadXmlFile Of hoXml "compress1.xml" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoXml To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Navigate to the "fox" node, which is the 1st child:
    Get ComFirstChild2 Of hoXml To iSuccess

    // Zip compress the content:
    Get ComZipContent Of hoXml To iSuccess

    // Navigate back to the root:
    Send ComGetRoot2 To hoXml

    // Examine the new XML document:
    Get ComGetXml Of hoXml To sTemp1
    Showln sTemp1

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

    // <root>
    //     <fox><![CDATA[lcvbEYIwFIThZ5ixh63A8QZqHzTA5UiiIQeTIGr1xhJ2Zp/++bYxNiKvV5/EJyTTJqzWOXSS4zQH
    // iVGG7aYsil1jBM/F9g90QVePm75xX6Y5Ql8S8lfg2u8Hg45/vyf9gfRH0p9IX5G+Jv2Z9BfSXwn/
    // Aw==
    // ]]>
    //         <child1>
    //             <grandchild>This is not compressed.</grandchild>
    //         </child1>
    //     </fox>
    // </root>

    // Now uncompress and show that the original content was restored:
    Get ComFirstChild2 Of hoXml To iSuccess
    Get ComUnzipContent Of hoXml To iSuccess
    Send ComGetRoot2 To hoXml
    Get ComGetXml Of hoXml To sTemp1
    Showln sTemp1


End_Procedure