Ruby机械化https错误

我正在努力做到以下几点：

page = Mechanize.new.get "https://sis-app.sph.harvard.edu:9030/prod/bwckschd.p_disp_dyn_sched"

但我只有一个例外：

OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=SSLv2/v3 read server hello A: sslv3 alert illegal parameter
    from /Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/net-http-persistent-2.7/lib/net/http/persistent/ssl_reuse.rb:70:in `connect'
    from /Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/net-http-persistent-2.7/lib/net/http/persistent/ssl_reuse.rb:70:in `block in connect'
    from /Users/amosng/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/timeout.rb:54:in `timeout'
    from /Users/amosng/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/timeout.rb:99:in `timeout'
    from /Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/net-http-persistent-2.7/lib/net/http/persistent/ssl_reuse.rb:70:in `connect'
    from /Users/amosng/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/net/http.rb:755:in `do_start'
    from /Users/amosng/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/net/http.rb:750:in `start'
    from /Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/net-http-persistent-2.7/lib/net/http/persistent.rb:511:in `connection_for'
    from /Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/net-http-persistent-2.7/lib/net/http/persistent.rb:806:in `request'
    from /Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/mechanize-2.5.1/lib/mechanize/http/agent.rb:258:in `fetch'
    from /Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/mechanize-2.5.1/lib/mechanize.rb:407:in `get'
    from (irb):549
    from /Users/amosng/.rvm/rubies/ruby-1.9.3-p194/bin/irb:16:in `<main>'

OpenSSL:：SSL:：SSLError:SSL\u connect返回=1 errno=0 state=SSLv2/v3读取服务器hello A:sslv3警报非法参数
from/Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/net-http-persistent-2.7/lib/net/http/persistent/ssl_reuse.rb:70:in“connect”
from/Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/net-http-persistent-2.7/lib/net/http/persistent/ssl\u reuse.rb:70:在“连接中的块”中
from/Users/amosng/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/timeout.rb:54:in'timeout'
from/Users/amosng/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/timeout.rb:99:in'timeout'
from/Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/net-http-persistent-2.7/lib/net/http/persistent/ssl_reuse.rb:70:in“connect”
from/Users/amosng/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/net/http.rb:755:in'do_start'
from/Users/amosng/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/net/http.rb:750:in'start'
from/Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/net-http-persistent-2.7/lib/net/http/persistent.rb:511:in'connection_for'
from/Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/net-http-persistent-2.7/lib/net/http/persistent.rb:806:在“请求”中
from/Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/mechanize-2.5.1/lib/mechanize/http/agent.rb:258:in'fetch'
from/Users/amosng/.rvm/gems/ruby-1.9.3-p194/gems/mechanize-2.5.1/lib/mechanize.rb:407:in'get'
发信人（irb）：549
from/Users/amosng/.rvm/rubies/ruby-1.9.3-p194/bin/irb:16:in`'

---

如何在Mechanize中加载网页？

有时您需要告诉Mechanize使用sslv3：

page = Mechanize.new{|a| a.ssl_version, a.verify_mode = 'SSLv3', OpenSSL::SSL::VERIFY_NONE}.get "https://sis-app.sph.harvard.edu:9030/prod/bwckschd.p_disp_dyn_sched"

---

请注意，我使用的是OpenSSL:：SSL:：VERIFY\u NONE。这意味着理论上你很容易受到中间人攻击，但这并不是我在抓取网站时通常担心的问题。

你能给我一个文档链接吗，你从哪里得到的？它可能不在那里，我想我在检查Mechanize#方法时注意到了这一点。我收到了一个类似的错误，使用相同的解决方案：

~/.rvm/gems/ruby-1.9.3-p374/gems/net-http-persistent-2.8/lib/net/http/persistent/ssl#reuse.rb:70:in'connect:ssl#connect返回=1 errno=0 state=SSLv2/v3读服务器hello A:（null）（OpenSSL:：ssl:：SSLError）

setting

ssl\u version='SSLv3'

解决了我眼前的问题，但我很想了解为什么有时候会出现这种情况。特别是考虑到错误消息说，

state=SSLv2/v3

I trid this and get。。SSL\u connect返回=1 errno=0 state=error:没有可用的协议（OpenSSL:：SSL:：SSLError）