关于：
http://rubydoc.info/github/arsduo/koala/master/koala/Facebook/GraphAPIMethods#graph_call-实例方法
http://developers.facebook.com/路线图/offline-access-removal/#extend_token
我的代码如下所示：
fb=考拉：：脸书：：API.new（access_token）fb.graph_call（“/oauth/access_token”，{“client_id”=>app_id，“client_secret”=>应用安全，“grant_type”=>“fb_exchange_token
虽然返回值包含扩展标记，但它正在引发MultiJson:：DecodeError
MultiJson:：解码错误：387:“access_token=long-lived_token&expires=5184000]”处出现意外标记来自/usr/local/rvm/gems/ruby-1.9.2-p136@点云/gems/json-1.6.1/lib/json/common.rb:148：在“parse”中来自/usr/local/rvm/gems/ruby-1.9.2-p136@点云/gems/json-1.6.1/lib/json/common.rb:148：在“parse”中来自/usr/local/rvm/gems/ruby-1.9.2-p136@点云/gems/multi_json-1.0.3/lib/multi.json/engines/json_gem.rb:13:in“解码”来自/usr/local/rvm/gems/ruby-1.9.2-p136@点云/gems/multi_json-1.0.3/lib/multi.json.rb:65：在“解码”中来自/usr/local/rvm/gems/ruby-1.9.2-p136@点云/gems/koala-1.3.0/lib/koala/api.rb:61：在“api”中来自/usr/local/rvm/gems/ruby-1.9.2-p136@点云/gems/koala-1.3.0/lib/koala/api/graphapi.rb:421：在“graph_call”中来自（irb）：7来自/usr/local/rvm/gems/ruby-1.9.2-p136@点云/gems/railties-3.1.3/lib/rails/commands/console.rb:45：在“start”中来自/usr/local/rvm/gems/ruby-1.9.2-p136@点云/gems/railties-3.1.3/lib/rails/commands/console.rb:8：在“start”中来自/usr/local/rvm/gems/ruby-1.9.2-p136@点云/gems/railties-3.1.3/lib/rails/commands.rb:40:in“<top（required）>”来自script/rails:6:在“require”中来自script/rails:6:在“<main>”中
我怀疑结局]这就是导致错误的原因。不确定这是不是我的脸书错误或处理不当。感谢有人能帮我。谢谢！
我还尝试使用Net:：HTTP.get（uri）。但得到了以下错误。
错误号：：ECONNRESET：对等方重置连接来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/protocol.rb:135:在“read_nonblock”中来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/protocol.rb:135:在“rbuf_fill”中来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/protocol.rb:116:in“readuntil”来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/protocol.rb:126：在“readline”中来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:2211:in“read_status_line”来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:2200：在“read_new”中来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:1183:在“transport_request”中来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:1169:in `request'来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:1073:在“request_get”中来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:394:in“get_response中的块”来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/rube/1.9.1/net/http.rb:627：在“开始”中来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:393:in `get_response'来自/usr/local/rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/net/http.rb:370:in `get'来自（irb）：11来自/usr/local/rvm/gems/ruby-1.9.2-p136@点云/gems/railties-3.1.3/lib/rails/commands/console.rb:45：在“start”中来自/usr/local/rvm/gems/ruby-1.9.2-p136@点云/gems/railties-3.1.3/lib/rails/commands/console.rb:8：在“start”中来自/usr/local/rvm/gems/ruby-1.9.2-p136@点云/gems/railties-3.1.3/lib/rails/commands.rb:40:in“<top（required）>”来自script/rails:6:在“require”中来自script/rails:6:在“<main>”中
不确定是防火墙还是什么？
