如何使用 Ruby Rest-Client 处理异常

我最近从 Ruby 的 Net:HTTP 类切换到 Rest-client 1.6.7。

我发现形成请求要容易得多，但与 Net:HTTP 请求不同，当 Rest-client 收到 200 以外的任何内容时，请求就会终止。我尝试在 RestClient.get 之后直接放置一个断点，但它永远不会被击中 - 所以我做错了。

def get_member_using_card
  resource = "#{@settings_app_uri}api/v1/card/#{self.member_card_num}?token=#{@settings.api_key}"
  response = RestClient.get resource
  if response.code == 200 
    card = JSON.parse(response.body)
    self.customer_id = card['card']['customer_id']
  else
    return 0
  end
end

结果是这个堆栈跟踪：

RestClient::ResourceNotFound - 404 Resource Not Found:
        /Users/tim/.rvm/gems/ruby-1.9.2-p290/gems/rest-client-1.6.7/lib/restclient/abstr
act_response.rb:48:in `return!'
        /Users/tim/.rvm/gems/ruby-1.9.2-p290/gems/rest-client-1.6.7/lib/restclient/reque
st.rb:230:in `process_result'
        /Users/tim/.rvm/gems/ruby-1.9.2-p290/gems/rest-client-1.6.7/lib/restclient/reque
st.rb:178:in `block in transmit'
        /Users/tim/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/net/http.rb:627:in `start'
        /Users/tim/.rvm/gems/ruby-1.9.2-p290/gems/rest-client-1.6.7/lib/restclient/reque
st.rb:172:in `transmit'
        /Users/tim/.rvm/gems/ruby-1.9.2-p290/gems/rest-client-1.6.7/lib/restclient/reque
st.rb:64:in `execute'
        /Users/tim/.rvm/gems/ruby-1.9.2-p290/gems/rest-client-1.6.7/lib/restclient/reque
st.rb:33:in `execute'
        /Users/tim/.rvm/gems/ruby-1.9.2-p290/gems/rest-client-1.6.7/lib/restclient.rb:68
:in `get'

有人可以告诉我如何正确评估响应代码并防止发生此异常......？

参见标题例外情况 on http://rubydoc.info/gems/rest-client/ http://rubydoc.info/gems/rest-client/

• 对于 200 到 207 之间的结果代码，将返回 RestClient::Response
• 对于结果代码 301、302 或 307，如果请求是 get 或 head，则将遵循重定向
• 对于结果代码 303，将遵循重定向并将请求转换为 get
• 对于其他情况，将引发持有响应的 RestClient::Exception，对于已知的错误代码，将抛出特定的异常类

RestClient.get 'http://example.com/resource'
➔ RestClient::ResourceNotFound: RestClient::ResourceNotFound`

begin
  RestClient.get 'http://example.com/resource'
rescue => e
  e.response
end
➔ 404 Resource Not Found | text/html 282 bytes