Ruby on rails 在rails中刮取子Web

我的应用程序正在连接一个网页，阅读链接并抓取链接中的网页

主网页-->链接（子网页）--->抓取和获取信息（标题）

出于某种原因，标题是可读的，但我有这个输出，（第89行是scraper|u sw.scrape（uri|u sw）。每个do|subpag |）

e$stdout.sync=true$stderr.sync=true；加载（$0=ARGV.shift）连接\u serv1.rb
/Users/sss/web/connect_serv1.rb:93:in`block（2层）in'：用于“来自纽约市的标题1方形图片”的未定义方法`titleweb'：String（NoMethodError）
from/Users/sss/web/connect_serv1.rb:89:in'each'
from/Users/sss/web/connect_serv1.rb:89:in'block in'
from/Users/sss/web/connect_serv1.rb:77:在'each'中
from/Users/sss/web/connect_serv1.rb:77:in`'
from/Users/sss/web/connect_serv1.rb:18:in`'
from-e:1:in“load”
from-e:1:in`'
进程已完成，退出代码为1

---

我真的很感谢你的帮助和时间

Scraper:：Base.parser:html\u parsersor对不起，我想知道Scraper是你写的东西，还是我可以在某处看一看的珍宝？它不是Ruby标准库的一部分。由于您看到的错误是

未定义的方法“titleweb”

我想看看

结果：titleweb

在做什么，但看起来这是Scraper中定义的。

scraper = Scraper.define do
    array :items

    process "div.mozaique>div", :items  => Scraper.define {

      process "div.thumb>a", :link => "@href"
      result :link
    }
    result :items
  end

  scraper_sw = Scraper.define do #this is the subweb
        array :subitems
        process "div#main", :subitems   => Scraper.define {
        process "div#main>h1>h2", :titleweb => :text
        result :titleweb
      }
    result :subitems
  end


  uri = URI.parse(URI.encode(web))

  scraper.scrape(uri).each do |pag|

    link_subweb = uri + pag.link.to_str


    savedata_array = JPG.new(:link_web => link_subweb.to_s,
                            :source => "server-1"
                            )

    uri_sw = URI.parse(URI.encode(link_subweb.to_s))

    scraper_sw.scrape(uri_sw).each do |subpag|

       savedata_subweb_array = JPG.new(:title => subpag.titleweb)

    end

  end

e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift) connect_serv1.rb
/Users/sss/web/connect_serv1.rb:93:in `block (2 levels) in <class:JPG>': undefined method `titleweb' for "Title 1 Square picture from NYC":String (NoMethodError)
    from /Users/sss/web/connect_serv1.rb:89:in `each'
    from /Users/sss/web/connect_serv1.rb:89:in `block in <class:JPG>'
    from /Users/sss/web/connect_serv1.rb:77:in `each'
    from /Users/sss/web/connect_serv1.rb:77:in `<class:JPG>'
    from /Users/sss/web/connect_serv1.rb:18:in `<top (required)>'
    from -e:1:in `load'
    from -e:1:in `<main>'

Process finished with exit code 1