oauth_simple [RubyGem]¶ ↑

Following example shows you how to obtain a request token from Twitter server:

require "oauth_simple"
req_uri_str  = 'https://api.twitter.com/oauth/request_token'
req_method   = 'POST'
consumer_sec = 'your_consumer_secret'
req_helper = OAuthSimple::RequestHelper.new(
  URI.parse( uri_str ),
  req_method,
  "#{OAuthSimple::HelperFunctions.enc_perenc(consumer_sec)}&",
  OAuthSimple::RequestParamList.new( [
    [ 'oauth_consumer_key',     'your_consumer_key'                                 ],
    [ 'oauth_signature_method', 'HMAC-SHA1'                                         ],
    [ 'oauth_timestamp',        OAuthSimple::HelperFunctions.create_timestamp_str() ],
    [ 'oauth_nonce',            OAuthSimple::HelperFunctions.create_nonce_str()     ],
    [ 'oauth_version',          '1.0'                                               ],
  ] ),
)
require 'net/https'
http = Net::HTTP.new( req_helper.host, req_helper.port )
http.use_ssl = true                          # SSLを有効に
http.verify_mode = OpenSSL::SSL::VERIFY_PEER # 認証モードをセット
http.start do |http|
  http.request_post( req_helper.qpath, req_helper.req_body,
              { 'Authorization' => req_helper.oauth_header_str } ) do |res|
    if res.code == '200'
      res.read_body do |str|
        puts 'str: ', str
      end
    end
  end
end

Alternatively, you can use OAuthSimple::HTTP, which is a subclass of Net::HTTP. Following example shows you how to obtain a temporaty credentials (request token) from Twitter server, how to obtain a token credentials (access token), and how to issue a authenticated request:

require 'net/https' # if you use ssl
require 'oauth_simple'
#
# OAuthSimple::HTTP is a subclass of Net::HTTP
http = OAuthSimple::HTTP.new( 'api.twitter.com', 443 )
#
# SSL setting
http.use_ssl     = true
http.verify_mode = OpenSSL::SSL::VERIFY_PEER # 認証モードをセット
#
# OAuth setting (this feature is provided by OAuthSimple::HTTP)
http.use_oauth = true
http.set_oauth_client_credentials( 'YOUR_CLIENT_CREDENTIALS', 'YOUR_CLIENT_SECRET' )
http.set_oauth_signature_method( 'HMAC-SHA1' ) # at this time, only 'HMAC-SHA1' is supported
#
# connection start
http.start() do |http|
  # == Obtaining Temporary Credentials ==
  token, secret = http.request_oauth_temp_credentials( '/oauth/request_token', 'oob' ) do |res_failed|
    # when response code is not '200', this block is called
    raise res_failed.body
  end
  # token and secret are set to OAuthSimple::HTTP object automatically in the request_oauth_temp_credentials method,
  # so you need not set them explicitly as follows
  #   http.set_oauth_user_credentials( token, secret )
  #
  # == Resource Owner Authorization ==
  puts "access to https://api.twitter.com/oauth/authorize?oauth_token=#{OAuthSimple::HelperFunctions.enc_perenc(token)} " + 
       'and input verifier'
  $stdout << 'verifier : '
  verifier = $stdin.gets.chomp
  #
  # == Obtaining Token Credentials ==
  token, secret = http.request_oauth_token_credentials( '/oauth/access_token', verifier ) do |res_failed|
    # when response code is not '200', this block is called
    raise res_failed.body
  end
  # token and secret are set to OAuthSimple::HTTP object automatically in the request_oauth_token_credentials method,
  # you need not set them explicitly as follows
  #   http.set_oauth_user_credentials( token, secret )
  #
  # == Authenticated Requests ==
  http.set_oauth_user_credentials( token, secret )
  http.request_get( '/1/statuses/home_timeline.json?include_entities=true' ) do |res|
    p res.code
    p res.body
  end
end