ieijiro_gdata.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'pit'
require 'gdata'

title = 'ieijiroflashcards'
config = Pit.get('google.com', :require => {
    'username' => 'your google.com username',
    'password' => 'your google.com password'
  })

client = GData::Client::DocList.new
client.clientlogin(config['username'], config['password'])

xml = client.get('http://docs.google.com/feeds/documents/private/full').to_xml
entry = xml.get_elements('//title[text()="%s"]/..' % title).first
src = entry.elements['content'].
  attributes['src'].
  sub('Export?', 'Export?exportFormat=txt&')
edit_link = entry.get_elements('link[@rel="edit-media"]').first.attributes['href']

# export
body = client.get(src).body

# update
client.headers['Content-Type'] = 'text/plain'
client.headers['If-Match'] = '*'
client.put(edit_link, body + "\nbaz_;_1_;_1_;_")