RubyTumblrTest.rb

#!/usr/bin/ruby
# encoding: utf-8

require "tumblr_client"

Tumblr.configure do |config|
  config.consumer_key = "..."
  config.consumer_secret = "..."
  config.oauth_token = "..."
  config.oauth_token_secret = "..."
end

client = Tumblr::Client.new()

puts client.info

client.photo('temp.lindachan.net',
             :data => "pic.jpg",
             :caption => "You're under arrest!",
             :tags => "test,yua,picture")