B4X

Insert PDF as Base64 into XML, then Extract back to PDF File

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Demonstrates how to insert any file into XML using base64 encoding, and then extract back to the original file. This example embeds a PDF in the XML, but the type of file does not matter. It can be any type of file. B4X

Dim success As Boolean = False

'  Load our PDF file.
Dim bd As ChilkatBinData
bd.Initialize
success = bd.LoadFile("qa_data/helloWorld.pdf")
If success <> True Then
    Log("Failed to load PDF file.")
    Return
End If


'  Load the following XML:
'  
'  <?xml version="1.0" encoding="utf-8" ?>
'  <something>
'      <xyz>
'          <abc123>A base64 encoded PDF file will be inserted under this node.</abc123>
'      </xyz>
'  </something>

Dim xml As ChilkatXml
xml.Initialize
success = xml.LoadXmlFile("qa_data/xml/xmlToContainPdf.xml")
If success <> True Then
    Log("Failed to load XML file.")
    Return
End If


'  Insert the PDF into the XML.
xml.NewChild2("xyz|pdfData", bd.GetEncoded("base64"))

'  Show the new XML:
Log(xml.GetXml)

'  The XML now looks like this:
'  <?xml version="1.0" encoding="utf-8" ?>
'  <something>
'      <xyz>
'          <abc123>A base64 encoded PDF file will be inserted under this node.</abc123>
'          <pdfData>JVBERi0xL ... UlRU9GCg==</pdfData>
'      </xyz>
'  </something>

'  To extract the PDF data out and restore the PDF file:
Dim bd2 As ChilkatBinData
bd2.Initialize
success = bd2.AppendEncoded(xml.GetChildContent("xyz|pdfData"), "base64")
success = bd2.WriteFile("qa_output/helloWorld.pdf")

Log("Success.")