Question

当我运行ruby filename.rb时，瘦Web服务器启动但当我尝试在localhost上查看（Sinatra）应用程序时：4567我收到此错误消息。谷歌搜索它什么也没透露。有谁知道我可以做些什么才能超越这个？

gems/eventmachine-0.12.10/lib/em/connection.rb:39:in `block in new': undefined method `associate_callback_target' for #<Thin::Connection:0x00000100fc7500> (NoMethodError)
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/em/connection.rb:36:in `instance_eval'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/em/connection.rb:36:in `new'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/eventmachine.rb:1430:in `event_callback'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/pr_eventmachine.rb:815:in `block in eventable_read'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/pr_eventmachine.rb:812:in `times'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/pr_eventmachine.rb:812:in `eventable_read'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/pr_eventmachine.rb:369:in `block in crank_selectables'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/pr_eventmachine.rb:369:in `each'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/pr_eventmachine.rb:369:in `crank_selectables'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/pr_eventmachine.rb:324:in `block in run'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/pr_eventmachine.rb:318:in `loop'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/pr_eventmachine.rb:318:in `run'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/pr_eventmachine.rb:64:in `run_machine'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/thin-1.4.1/lib/thin/backends/base.rb:63:in `start'
    from /Users/michaeljohnmitchell/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/thin-1.4.1/lib/thin/server.rb:159:in `start'
    from /Users/mm/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/rack-1.4.1/lib/rack/handler/thin.rb:13:in `run'
    from /Users/mm/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/sinatra-1.3.3/lib/sinatra/base.rb:1350:in `run!'
    from /Users/mm/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/sinatra-1.3.3/lib/sinatra/main.rb:25:in `block in <module:Sinatra>'

代码来自Ruby中的克隆Internet应用程序。每个演示应用都会发生这种情况......

路线代码

get '/' do haml :index end

post '/' do
  uri = URI::parse(params[:original])
  custom = params[:custom].empty? ? nil : params[:custom]
  raise "Invalid URL" unless uri.kind_of? URI::HTTP or uri.kind_of? URI::HTTPS
  @link = Link.shorten(params[:original], custom) 
  haml :index
end

['/info/:short_url', '/info/:short_url/:num_of_days', '/info/:short_url/:num_of_days/:map'].each do |path|
  get path do
    @link = Link.first(:identifier => params[:short_url])
    raise 'This link is not defined yet' unless @link
    @num_of_days = (params[:num_of_days] || 15).to_i
    @count_days_bar = Visit.count_days_bar(params[:short_url], @num_of_days)
    chart = Visit.count_country_chart(params[:short_url], params[:map] || 'world')
    @count_country_map = chart[:map]
    @count_country_bar = chart[:bar]
    haml :info
  end
end

get '/:short_url' do 
  link = Link.first(:identifier => params[:short_url])
  link.visits << Visit.create(:ip => get_remote_ip(env))
  link.save
  redirect link.url.original, 301
end

error do haml :index end

def get_remote_ip(env)
  if addr = env['HTTP_X_FORWARDED_FOR']
    addr.split(',').first.strip
  else
    env['REMOTE_ADDR']
  end
end

Answer 1

我是使用Ruby克隆Internet应用程序一书的作者。我尝试在GitHub存储库中运行代码，并禁止一些更改（由于Sinatra中的更改）我可以成功运行它。也许你可以尝试Prakash Murthy给出的答案，升级到EventMachine 1.0.0，但我运行的版本与你相同（0.12.10）并且没有给我任何问题。

如果你直接给我发电子邮件，我们可以解决这个问题（并稍后更新Stack Overflow）。

Answer 2

我使用Ruby 1.9.2遇到了这个问题。两个版本的Eventmachine（0.12.10和1.0.x）都引发了这个问题。在链接Github问题的提示后，我切换到Ruby 2.1.1并重新捆绑;安装了Eventmachine 1.0.3并且问题消失了。

（这一切都涉及到我的大量牦牛剃须，涉及将我的Mac更新为Mavericks，吹走了大量过时的库，并重新安装Xcode和Homebrew - 希望它对其他人来说更简单。）

精简错误消息

2 个答案: