Weibo Oauth2 use OAuth2 gem

gistfile1.rb

require 'oauth2'                                                   
require 'json'                                                               
OAuth2::Response.register_parser(:text, 'text/plain') do |body|             
    parsed_body = JSON.parse(body)
    parsed_body                                             
end                                                                                                                                             
client = OAuth2::Client.new(YOU_KEY, YOU_SECRET, :site => "https://api.weibo.com", :authorize_url => "/oauth2/authorize", :token_url => "/oauth2/access_token")            
puts client.auth_code.authorize_url(:redirect_uri => YOUR_CALLBACK_URL)                                                                              

token = client.auth_code.get_token('authorization_code_value', :redirect_uri => YOUR_CALLBACK_URL)
token.options[:header_format] = 'OAuth2 %s'

response = token.get('/2/statuses/public_timeline.json')