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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，并调用速度很慢的政府网站。我收到无法修复的超时错误（在下方）。

读取超时出现在请求的 20 秒处。

以下行导致问题：

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

是否有解决此问题的环境变量？还有什么我想念的吗？

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'
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1 回答 1

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作为临时修复的解决方案是通过 Mechanize 使用代理服务器。在我连接的服务器和 Heroku EC2 实例的 IP 地址范围之间一定有什么事情发生了。

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，它仍然会有所帮助。

于 2012-08-04T13:21:04.280 回答