Merge pull request #338 from Nakilon/patch-1

required 'tempfile'

lib/google/apis/core/upload.rb

@@ -18,6 +18,7 @@ require 'google/apis/core/api_command'
 require 'google/apis/errors'
 require 'addressable/uri'
 require 'mime-types'
+require "tempfile"
 
 module Google
   module Apis