post_tumblr.rb

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

require 'net/http'
require 'time'
require 'rubygems'
require 'pit'
require 'kconv'

def post url, opt = {}
  uri = (url.class == URI) ? url : URI(url)
  Net::HTTP.post_form uri, opt
end

def post_tumblr text
  post_url = 'http://www.tumblr.com/api/write'
  opt = {
    'type'  => 'regular',
    'title' => Time.now.iso8601,
    'body'  => text,
    'group' => 'http://swdyh.tumblr.com/',
    'format' => 'markdown',
  }
  res = post(post_url, opt.merge(Pit.get('tumblr.com')))
  puts res.body
end

post_tumblr Kconv.toutf8(`pbpaste`)