gettoken.rb

#!env ruby
#encoding: utf-8

#######################################

CONSUMER_KEY = ""
CONSUMER_SECRET = ""

#######################################

require 'oauth'
require 'net/http'

key = CONSUMER_KEY
secret = CONSUMER_SECRET

while key.empty?
    print "consumer key: "
    key = gets.chomp
end
while secret.empty?
    print "consumer secret: "
    secret = gets.chomp
end

oauth = OAuth::Consumer.new(
    CONSUMER_KEY,
    CONSUMER_SECRET,
    site: "https://oauth.twitter.com"
)

request_token = oauth.get_request_token
puts "Access this URL: #{request_token.authorize_url}"
print "PIN: "
pin = gets.chomp.to_i
access_token = request_token.get_access_token(
    oauth_verifier: pin
)
puts access_token.token, access_token.secret