pdf-reader-get-fields.rb

gistfile1.txt

def get_fields
    # We have to use #send because AFAIK, PDF::Reader does not expose the root object anywhere
    acroform = @reader.send(:root)[:AcroForm]

    # PDF::Reader encapsulates each piece of PDF data in #objects. The field_refs are really references to
    # these objects. We iterate through and de-reference the actual object, creating a AcroField based on its
    # data
    field_refs = @reader.objects[acroform][:Fields] unless acroform.nil?
    fields = field_refs.map do |field_ref|
      AcroField.new(@reader.objects[field_ref])
    end unless field_refs.blank?
    fields
  end