为什么机械化不遵循链接

Question

我想跟随Mechanize的链接，但它似乎并没有工作，语法看起来是正确的，我引用这个不正确，或者我需要做别的吗？

问题区域

agent.page.links_with(:text => 'VG278H')[2].click 

全码

require 'rubygems' 
require 'mechanize' 
require 'open-uri' 

agent = Mechanize.new 

agent.get ("http://icecat.biz/en/") 

#Show all form fields belonging to the first form 
form = agent.page.forms[0].fields 

#Enter VG278H into the text box lookup_text, submit the data 
agent.page.forms[0]["lookup_text"] = "VG278H" 
agent.page.forms[0].submit #Results of this is stored in Mechanize agent.page object 

#Call agent.page with our results and assign them to a variable page 
page = agent.page 

agent.page.links_with(:text => 'VG278H')[2].click 

doc = page.parser 
puts doc 

Answer 1

你应该抓住（http://www.charlesproxy.com/）查尔斯的副本或东西，可以让你观看，当您提交表单，会发生什么从您的浏览器。无论如何，你的问题是，这部分：

agent.page.forms[0]["lookup_text"] = "VG278H" 
agent.page.forms[0].submit 

正在恢复，看起来像这样一个HTML片段：

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><script>self.location.href="http://icecat.us/index.cgi?language=en&new_search=1&lookup_text=VG278H"</script> 

所以你确实需要直接调用此或报废了的self.location。 href和有你的代理执行GET：

page = agent.get("http://icecat.us/index.cgi?language=en&new_search=1&lookup_text=VG278H") 

如果你要做到这一点，这个工程：

require 'rubygems' 
require 'mechanize' 
require 'open-uri' 

agent = Mechanize.new 

agent.get ("http://icecat.biz/en/") 

page = agent.get("http://icecat.us/index.cgi?language=en&new_search=1&lookup_text=VG278H") 

page = page.links_with(:text => 'VG278H')[2].click 

doc = page.parser 
puts doc 

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