Question

我在Heroku托管的Rails应用程序中进行了一项操作，该应用程序在后台进程中运行，并且呼叫一个速度缓慢的政府网站。我收到了一个我无法解决的超时错误（在下面的底部）。

读取超时出现在请求的20秒内。

以下行导致问题：

Mechanize.new.get('http://ai.fmcsa.dot.gov/SMS/Data/Search.aspx')

是否有修复此问题的环境变量？我还缺少其他什么东西？

Errno::ETIMEDOUT: Connection timed out - connect(2)
    from /app/vendor/bundle/ruby/1.9.1/gems/net-http-persistent-2.7/lib/net/http/persistent/ssl_reuse.rb:29:in `initialize'
    from /app/vendor/bundle/ruby/1.9.1/gems/net-http-persistent-2.7/lib/net/http/persistent/ssl_reuse.rb:29:in `open'
    from /app/vendor/bundle/ruby/1.9.1/gems/net-http-persistent-2.7/lib/net/http/persistent/ssl_reuse.rb:29:in `block in connect'
    from /usr/local/lib/ruby/1.9.1/timeout.rb:44:in `timeout'
    from /usr/local/lib/ruby/1.9.1/timeout.rb:89:in `timeout'
    from /app/vendor/bundle/ruby/1.9.1/gems/net-http-persistent-2.7/lib/net/http/persistent/ssl_reuse.rb:29:in `connect'
    from /usr/local/lib/ruby/1.9.1/net/http.rb:637:in `do_start'
    from /usr/local/lib/ruby/1.9.1/net/http.rb:632:in `start'
    from /app/vendor/bundle/ruby/1.9.1/gems/net-http-persistent-2.7/lib/net/http/persistent.rb:768:in `reset'
    from /app/vendor/bundle/ruby/1.9.1/gems/net-http-persistent-2.7/lib/net/http/persistent.rb:503:in `connection_for'
    from /app/vendor/bundle/ruby/1.9.1/gems/net-http-persistent-2.7/lib/net/http/persistent.rb:806:in `request'
    from /app/vendor/bundle/ruby/1.9.1/gems/mechanize-2.5.1/lib/mechanize/http/agent.rb:258:in `fetch'
    from /app/vendor/bundle/ruby/1.9.1/gems/mechanize-2.5.1/lib/mechanize.rb:407:in `get'
    from /app/app/models/inspection.rb:14:in `fmcsa_summary'
    from (irb):5
    from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.6/lib/rails/commands/console.rb:47:in `start'
    from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.6/lib/rails/commands/console.rb:8:in `start'
    from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.6/lib/rails/commands.rb:41:in `<top (required)>'
    from script/rails:6:in `require'

Answer 1

作为临时修复的解决方案是通过Mechanize使用代理服务器。我要连接的服务器和Heroku EC2实例的IP地址范围之间必定存在一些问题。

agent = Mechanize.new { |a| a.set_proxy(url,port,username,password) }

如果有人知道原始问题的根本原因，那仍然会有所帮助。

如何在Heroku上修复HTTP读取操作的“连接超时”错误？

1 个答案: