100%无终止CPU使用，不带cert获取SSL页。

Question

在Ruby1.9.3上使用机械2.6.0，我试图从Windows7x64的HTTPS上获取一个网页。当我尝试get() URL时，CPU使用率达到100%，并且该方法永远不会返回：

require 'mechanize'
uri = "https://my.com/wiki/api.php?action=query&titles=US4&prop=info&format=xml"
agent = Mechanize.new
u,p   = %w[myusername mypassword]
agent.add_auth( uri, u, p )
agent.agent.http.verify_mode = OpenSSL::SSL::VERIFY_NONE 
info = agent.get( uri )

当我中断它时，我会得到这些堆栈跟踪(三次不同的运行)：

>> info = agent.get( page_api )
IRB::Abort: abort then interrupt!
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/www_authenticate_parser.rb:27:in `call'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/www_authenticate_parser.rb:27:in `parse'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/agent.rb:716:in `response_authenticate'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/agent.rb:306:in `fetch'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize.rb:431:in `get'
        from (irb):10
        from C:/Ruby193/bin/irb:12:in `<main>'
>> info = agent.get( page_api )
IRB::Abort: abort then interrupt!
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/www_authenticate_parser.rb:29:in `call'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/www_authenticate_parser.rb:29:in `new'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/www_authenticate_parser.rb:29:in `parse'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/agent.rb:716:in `response_authenticate'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/agent.rb:306:in `fetch'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize.rb:431:in `get'
        from (irb):11
        from C:/Ruby193/bin/irb:12:in `<main>'
>> info = agent.get( page_api )
IRB::Abort: abort then interrupt!
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/www_authenticate_parser.rb:114:in `call'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/www_authenticate_parser.rb:114:in `token'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/www_authenticate_parser.rb:31:in `parse'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/agent.rb:716:in `response_authenticate'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize/http/agent.rb:306:in `fetch'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mechanize-2.6.0/lib/mechanize.rb:431:in `get'
        from (irb):12
        from C:/Ruby193/bin/irb:12:in `<main>'

如何解决这个问题并通过Windows上的Ruby正确地获取HTTPS URL？(如果有一个比机械化更好的解决方案-因为我只需要页面的源代码来输入Nokogiri -那么我完全可以不使用机械化。)

另一个数据点:在OS上尝试相同的代码会产生相同的结果。

下面是页面的实际内容，使用下面的解决方案中描述的替代抓取方法：

p fetch_https_without_ssl_verification(uri, u, p)
#=> "\t\t       <?xml version=\"1.0\"?><api><query><normalized><n from=\"Devtools/UI_Composer/DesignSpec/US7294\" to=\"Devtools/UI Composer/DesignSpec/US7294\" /></normalized><pages><page ns=\"0\" title=\"Devtools/UI Composer/DesignSpec/US7294\" missing=\"\" /></pages></query></api>"

Answer 1

如果您只需要URL的内容(就像我所做的那样)，那么使用卷曲而不是机械化要容易得多，而且它是有效的：

def fetch_https_without_ssl_verification( uri, user=nil, pass=nil )
  `curl -s -k #{%Q{-u "#{user}#{":"<<pass if pass}"} if user} "#{uri}"`
end