GData batch requests

gdata_batch_request.rb

# NOTE: This call will result in an error. Apparently queries cannot be batched (https://groups.google.com/forum/?fromgroups=#!searchin/youtube-api-gdata/Invalid$20entry$20Id$2FUri/youtube-api-gdata/2QQSXx8-c4A/UAJ9NhMzgvMJ). 
# The surrounding xml container for batch requests is valid and is saved here as an example.

require 'builder'
xml = Builder::XmlMarkup.new; false
xml.instruct! :xml, :encoding => "UTF-8"
ns = {"xmlns"=>"http://www.w3.org/2005/Atom", "xmlns:openSearch"=>"http://a9.com/-/spec/opensearchrss/1.0/", "xmlns:g"=>"http://base.google.com/ns/1.0", "xmlns:batch"=>"http://schemas.google.com/gdata/batch"}
xml.feed(ns) do |feed|
  feed.title "Channel stats query"
  
  feed.entry do |entry|
    entry.id 'http://gdata.youtube.com/feeds/api/channels?q=machinima&v=2'
    entry.tag!("batch:operation", :type => "query")
  end
end
response = client.post("http://gdata.youtube.com/feeds/api/channels/batch?v=2", xml)