Lua

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

See more XML Examples

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. Lua

local chilkat = require("chilkat")

-- Load our PDF file.
local bd = chilkat.BinData.new()
local success = bd:load_file("qa_data/helloWorld.pdf")
if not success then
    print("Failed to load PDF file.")
    return
end

-- 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>

local xml = chilkat.Xml.new()
success = xml:load_xml_file("qa_data/xml/xmlToContainPdf.xml")
if not success then
    print("Failed to load XML file.")
    return
end

-- Insert the PDF into the XML.
xml:new_child2("xyz|pdfData", bd:get_encoded("base64"))

-- Show the new XML:
print(xml:get_xml())

-- 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:
local bd2 = chilkat.BinData.new()
success = bd2:append_encoded(xml:get_child_content("xyz|pdfData"), "base64")
success = bd2:write_file("qa_output/helloWorld.pdf")

print("Success.")