Quick Twitter client

gistfile1.rb

require "openssl"
require "base64"
require "securerandom"
require "httparty"
require "cgi"

class Twitter
  
  def self.escape(value) 
    CGI.escape(value.to_s).gsub("%7E", '~').gsub("+", "%20") 
  end
  
  # Direct message endpoint
  def self.dm
    'https://api.twitter.com/1/direct_messages/new.json'
  end
  
  def self.get_header    
    params = {
          :oauth_consumer_key => 'app_consumer_key',
          :oauth_nonce => SecureRandom.hex(16),
          :oauth_signature_method => 'HMAC-SHA1',
          :oauth_timestamp => Time.now.to_i.to_s,
          :oauth_token => 'oauth_token',
          :oauth_version => '1.0'
      }

    status = escape("screen_name=screenname&text=foobar&user_id=123456")

    base_string = 'POST&' + escape(dm) + '&' + params.map { |w| w[1] = escape(w[1]); w.join('%3D') }.join('%26') + status

    p base_string

    key = 'key&secret'

    signature = escape(Base64.encode64(OpenSSL::HMAC.digest('sha1', key, base_string)).chomp)

    header = 'OAuth ' + params.merge(:oauth_signature => signature).map { |e| e[0].to_s + '="' + e[1] + '"' }.join(', ')

    header
  end

  include HTTParty
  headers 'Authorization' => get_header
  headers 'Content-Type' => 'application/x-www-form-urlencoded'
end

req = Twitter.post(Twitter.dm, {:body => {:screen_name => 'screenname', :text => 'foobar', :user_id => "123456"}})

p req