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|
#!/usr/bin/env ruby
begin
require 'origami'
rescue LoadError
$: << File.join(__dir__, "/../../lib")
require 'origami'
end
include Origami
#
# Emulating JavaScript inside a PDF object.
#
if defined?(PDF::JavaScript::Engine)
# Creating a new file
pdf = PDF.new
# Embedding the file into the PDF.
pdf.attach_file(DATA,
name: "README.txt",
filter: :ASCIIHexDecode
)
# Example of JS payload
pdf.onDocumentOpen Action::JavaScript <<-JS
if ( app.viewerVersion == 8 )
eval("this.exportDataObject({cName:'README.txt', nLaunch:2});");
this.closeDoc();
JS
# Tweaking the engine options
pdf.js_engine.options[:log_method_calls] = true
pdf.js_engine.options[:viewerVersion] = 10
# Hooking eval()
pdf.js_engine.hook 'eval' do |eval, expr|
puts "Hook: eval(#{expr.inspect})"
eval.call(expr) # calling the real eval method
end
# Example of inline JS evaluation
pdf.eval_js 'console.println(util.stringFromStream(this.getDataObjectContents("README.txt")))'
# Executes the string as a JS script
pdf.Catalog.OpenAction[:JS].eval_js
else
abort "JavaScript support not found. You need to install therubyracer gem."
end
__END__
** THIS IS THE EMBEDDED FILE **
|
