twitter_update.rb

require 'openssl'
require 'uri'
require 'net/http'
require 'yaml'
require 'pp'

app_info = YAML.load_file 'consumer_info.yml'
CONSUMER_KEY = app_info['consumer_key']
CONSUMER_SECRET = app_info['consumer_secret']
OAUTH_TOKEN = app_info['oauth_token']
OAUTH_TOKEN_SECRET = app_info['oauth_token_secret']

METHOD = 'POST'

UPDATE_URL = 'http://api.twitter.com/1/statuses/update.json'

def random_str
  a = ('a'..'z').to_a + ('A'..'Z').to_a + ('0'..'9').to_a
  (Array.new(16){a[rand(a.size)]}).join
end

def sort_and_concat(params)
  params.sort.map{|i|i.join("=")}.join("&")
end

def escape(str)
  URI.escape(str,Regexp.new("[^a-zA-Z0-9._-]"))
end

def get_signature(params,method,url,oauth_token_secret=nil)
  param_str = sort_and_concat(params)
  value = [method,escape(url),escape(param_str)].join("&")
  signature_key = "#{CONSUMER_SECRET}&#{oauth_token_secret.nil? ? "" : oauth_token_secret}"
  sha1 = OpenSSL::HMAC.digest(OpenSSL::Digest::SHA1.new, signature_key, value)
  [sha1].pack('m').gsub(/\n/,'')
end
text = 'oppai'

params = {
  "oauth_consumer_key" => CONSUMER_KEY,
  "oauth_signature_method" => "HMAC-SHA1",
  "oauth_timestamp" => Time.now.to_i.to_s,
  "oauth_nonce" => random_str,
  "oauth_version" => "1.0"
}

params['status'] = text
params['oauth_token'] = OAUTH_TOKEN
params['oauth_signature'] = escape get_signature(params,METHOD,UPDATE_URL,OAUTH_TOKEN_SECRET)
params.delete 'status'

uri = URI.parse(UPDATE_URL)
#proxy_class = Net::HTTP::Proxy(ARGV[0], 8080)
proxy_class = Net::HTTP::Proxy(nil, 8080)
http = proxy_class.new(uri.host)
http.start do |h|
  param = sort_and_concat(params).gsub('&',',')
  res = h.post(uri.path,"status=#{text}",{'Authorization' => "OAuth #{param}"})
    if res.code == "200"
      puts res.code
      puts res.body
    else
      puts res.code
      puts res.body
    end
end