Hpricot在Rails控制器中的超時錯誤

Question

嘿 - 我正在編寫一個使用digg API的基本Rails應用程序。我試圖解析digg api提供的xp數據，但在測試頁面時，瀏覽器會掛起，直到我最終捕獲到Timeout :: Error異常。

下面是控制器代碼：

require 'rubygems' 
require 'hpricot' 
require 'open-uri' 

appkey = 'http://mportiz08.homeip.net/twigg' 
query = CGI::escape(params[:id].gsub('_', ' ').gsub('#', '')) 

@request = 'http://services.digg.com/search/stories?query=' + query + '&appkey=' + appkey 
@response = Hpricot(open(@request)) 

而這裏的堆棧跟蹤：

/usr/lib/ruby/1.8/timeout.rb:60:in `rbuf_fill' 
/usr/lib/ruby/1.8/net/protocol.rb:134:in `rbuf_fill' 
/usr/lib/ruby/1.8/net/protocol.rb:116:in `readuntil' 
/usr/lib/ruby/1.8/net/protocol.rb:126:in `readline' 
/usr/lib/ruby/1.8/net/http.rb:2020:in `read_status_line' 
/usr/lib/ruby/1.8/net/http.rb:2009:in `read_new' 
/usr/lib/ruby/1.8/net/http.rb:1050:in `request' 
/usr/lib/ruby/1.8/open-uri.rb:248:in `open_http' 
/usr/lib/ruby/1.8/net/http.rb:543:in `start' 
/usr/lib/ruby/1.8/open-uri.rb:242:in `open_http' 
/usr/lib/ruby/1.8/open-uri.rb:616:in `buffer_open' 
/usr/lib/ruby/1.8/open-uri.rb:164:in `open_loop' 
/usr/lib/ruby/1.8/open-uri.rb:162:in `catch' 
/usr/lib/ruby/1.8/open-uri.rb:162:in `open_loop' 
/usr/lib/ruby/1.8/open-uri.rb:132:in `open_uri' 
/usr/lib/ruby/1.8/open-uri.rb:518:in `open' 
/usr/lib/ruby/1.8/open-uri.rb:30:in `open' 
/home/marcus/dev/ruby/twigg/app/controllers/stories_controller.rb:15:in `view' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/base.rb:1327:in `send' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/base.rb:1327:in `perform_action_without_filters' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/filters.rb:617:in `call_filters' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/filters.rb:610:in `perform_action_without_benchmark' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/rescue.rb:160:in `perform_action_without_flash' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/flash.rb:146:in `perform_action' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/base.rb:527:in `send' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/base.rb:527:in `process_without_filters' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/filters.rb:606:in `process' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/base.rb:391:in `process' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/base.rb:386:in `call' 
/var/lib/gems/1.8/gems/actionpack-2.3.3/lib/action_controller/routing/route_set.rb:434:in `call' 

我只是學習Rails和我想不通這是怎麼回事。任何想法爲什麼發生這種情況？

更新

我嘗試同樣的確切過程與本地保存的xml文件，和它的工作完美 - 這個問題可能有一些做與開URI和遠程XML

Answer 1

MAYB diggs只接受網頁瀏覽器？

我覺得HPricot發送另一個用戶頭？ 想知道從hpricot發送了哪些頭文件嗎？

Answer 2

Lichtamberg - 你是對的。問題是，Digg的需要用戶代理頭與請求一起發送：see here

我只是修改了打開的方法調用是這樣的：

@response = Hpricot(open(@request, 'User-Agent' => 'twigg'))