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rubynokogirixfdf

Is there a Nokogiri example code for parsing Acrobat XFDF?

I am looking for a ruby code snippet that shows use of Nokogiri to parse Acrobat XFDF data.

Solution

  • It's no different than parsing any other XML:

    require 'nokogiri'

xfdf = '<?xml version="1.0" encoding="UTF-8"?>
<xfdf xmlns="http://ns.adobe.com/xfdf/" xml:space="preserve">
  <f href="Demo PDF Form.pdf"/>
  <fields>
    <field name="Date of Birth">
      <value>01-01-1960</value>
    </field>
    <field name="Your Name">
      <value>Mr. Customer</value>
    </field>
  </fields>
  <ids original="FEBDB19E0CD32274C16CE13DCF244AD2" modified="5BE74DD4F607B7409DC03D600E466E12"/>
</xfdf>
'

doc = Nokogiri::XML(xfdf)
doc.at('//xmlns:f')['href'] # => "Demo PDF Form.pdf"
doc.at('//xmlns:field[@name="Date of Birth"]').text # => "\n      01-01-1960\n    "
doc.at('//xmlns:field[@name="Your Name"]').text # => "\n      Mr. Customer\n    "

    It uses a XML namespace, so you have to honor that in the xpaths, or deal with it by telling Nokogiri to ignore them, but this is common in XML.