我正在尝试编写我的第一个 Ruby 程序，但遇到了问题。该代码必须通过 HTTP 下载 32 个 MP3 文件。它实际上下载了一些，然后超时。

我尝试设置超时时间，但没有任何区别。在Windows、Cygwin和Mac OS X下运行代码结果相同。

这是代码:

require 'rubygems'
require 'open-uri'
require 'nokogiri'
require 'set'
require 'net/http'
require 'uri'

 puts "\n Up and running!\n\n"

 links_set = {}

 pages = ['http://www.vimeo.com/siai/videos/sort:oldest',
   'http://www.vimeo.com/siai/videos/page:2/sort:oldest',
   'http://www.vimeo.com/siai/videos/page:3/sort:oldest']

 pages.each do |page|
  doc = Nokogiri::HTML(open(page))
  doc.search('//*[@href]').each do |m|
   video_id = m[:href]
   if video_id.match(/^\/(\d+)$/i)
     links_set[video_id[/\d+/]] = m.children[0].to_s.split(" at ")[0].split(" -- ")[0]
    end
   end
 end

 links = links_set.to_a

 p links

 cookie = ''
 file_name = ''

 open("http://www.tubeminator.com") {|f|
   cookie = f.meta['set-cookie'].split(';')[0]
 }

 links.each do |link|
  open("http://www.tubeminator.com/ajax.php?function=downloadvideo&url=http%3A%2F%2Fwww.vimeo.com%2F" + link[0],
   "Cookie" => cookie) {|f|
      puts f.read
  } 

  open("http://www.tubeminator.com/ajax.php?function=convertvideo&start=0&duration=1120&size=0&format=mp3&vq=high&aq=high",
   "Cookie" => cookie) {|f|
      file_name = f.read
   }
  puts file_name

  Net::HTTP.start("www.tubeminator.com") { |http|
   #http.read_timeout = 3600 # 1 hour
     resp = http.get("/download-video-" + file_name)
     open(link[1] + ".mp3", "wb") { |file|
        file.write(resp.body)
     }
    }  
 end 

 puts "\n Yay!!"

这是个异常(exception):

/Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/protocol.rb:140:in `rescue in rbuf_fill': Timeout::Error (Timeout::Error)
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/protocol.rb:134:in `rbuf_fill'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/protocol.rb:116:in `readuntil'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/protocol.rb:126:in `readline'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/http.rb:2138:in `read_status_line'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/http.rb:2127:in `read_new'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/http.rb:1120:in `transport_request'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/http.rb:1106:in `request'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:312:in `block in open_http'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/http.rb:564:in `start'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:306:in `open_http'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:767:in `buffer_open'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:203:in `block in open_loop'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:201:in `catch'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:201:in `open_loop'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:146:in `open_uri'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:669:in `open'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:33:in `open'
 from test.rb:38:in `block in <main>'
 from test.rb:37:in `each'
 from test.rb:37:in `<main>'

我也非常感谢您对其余代码的评论。

最佳答案

对于 Ruby 1.8，我用它来解决我的超时问题。在我的代码中扩展 Net::HTTP 类并使用默认参数重新初始化，包括初始化我自己的 read_timeout 应该让事情保持理智，我认为。

require 'net/http'

# Lengthen timeout in Net::HTTP
module Net
    class HTTP
        alias old_initialize initialize

        def initialize(*args)
            old_initialize(*args)
            @read_timeout = 5*60     # 5 minutes
        end
    end
end

关于Ruby Net::HTTP 超时，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/2229194/