使用Nokogiri获取整个div部分

时间:2013-08-02 16:26:57

标签: ruby css-selectors selenium-webdriver nokogiri

我正在尝试用一些场景来学习Nokogiri,并且正在使用它解析html代码。

doc = Nokogiri::HTML($driver.page_source)

在我的代码中,我有多个div部分,它们有一些嵌套的span和div标签,如下所示:

<div class="class1 class2 class3 class4" style="padding: 4px;" id="_28f331c5-3e42-4944-aa3f-15b68f453a2b"> 
  <span class="class5" style="font-weight: bold; text-decoration: underline;">This is a String Text</span> 
  <div class="class6" dd:contenttype="content_type1" dd:concept="concept1" id="_8c83d6b3-55a1-4e88-b8af-9578bbfdef83">
    <div class="class7"> 
      <div class="class8" dd:contenttype="content_type2" dd:entityid="0" dd:entityversion="0" id="_cb48e502-9d87-451c-a7cf-4df104f21e51"> 
        <div class="class9 class10" dd:btnfloatingstyle="top-right" dd:entitytexttype="resultval" id="_9e48a58b-3f06-4ce1-8a1e-fb7f4c5d1fc0" contenteditable="true"></div> 
      </div> 
    </div>
  </div> 
</div>

<div class="class1 class2 class3 class4" style="padding: 4px;" id="_28f331c5-3e42-4944-aa3f-15b68f453a2b"> 
  <span class="class5" style="font-weight: bold; text-decoration: underline;">New String Text</span> 
  <div class="class6" dd:contenttype="content_type1" dd:concept="concept1" id="_8c83d6b3-55a1-4e88-b8af-9578bbfdef83">
    <div class="class7"> 
      <div class="class8" dd:contenttype="content_type2" dd:entityid="0" dd:entityversion="0" id="_cb48e502-9d87-451c-a7cf-4df104f21e51"> 
        <div class="class9 class10" dd:btnfloatingstyle="top-right" dd:entitytexttype="resultval" id="_9e48a58b-3f06-4ce1-8a1e-fb7f4c5d1fc0" contenteditable="true"></div> 
      </div> 
    </div>
  </div> 
</div>

我正在寻找的是当我传递一个字符串“This is a String Text”作为方法的输入时,它应该查看多个div部分并返回适当的整个div部分及其嵌套的span和div的。

有没有直接的方法来实现我想要的Nokogiri或任何其他API,或者我是否需要编写一个方法来遍历元素,它的父元素然后是孩子?

请建议直接的方式,如果还有其他我会编写我自己的代码来遍历。

1 个答案:

答案 0 :(得分:1)

如果需要根据子节点获取节点,则必须使用xpath-selector而不是css-selector。

要获取包含span的div,请执行:

node = doc.at_xpath('//div[./span[text()="New String Text"]]')

可运行的例子:

require 'nokogiri'

html = %q[
<body>
<div class="class1 class2 class3 class4" style="padding: 4px;" id="_28f331c5-3e42-4944-aa3f-15b68f453a2b"> 
  <span class="class5" style="font-weight: bold; text-decoration: underline;">This is a String Text</span> 
  <div class="class6" dd:contenttype="content_type1" dd:concept="concept1" id="_8c83d6b3-55a1-4e88-b8af-9578bbfdef83">
    <div class="class7"> 
      <div class="class8" dd:contenttype="content_type2" dd:entityid="0" dd:entityversion="0" id="_cb48e502-9d87-451c-a7cf-4df104f21e51"> 
        <div class="class9 class10" dd:btnfloatingstyle="top-right" dd:entitytexttype="resultval" id="_9e48a58b-3f06-4ce1-8a1e-fb7f4c5d1fc0" contenteditable="true"></div> 
      </div> 
    </div>
  </div> 
</div>

<div class="class1 class2 class3 class4" style="padding: 4px;" id="_28f331c5-3e42-4944-aa3f-15b68f453a2b"> 
  <span class="class5" style="font-weight: bold; text-decoration: underline;">New String Text</span> 
  <div class="class6" dd:contenttype="content_type1" dd:concept="concept1" id="_8c83d6b3-55a1-4e88-b8af-9578bbfdef83">
    <div class="class7"> 
      <div class="class8" dd:contenttype="content_type2" dd:entityid="0" dd:entityversion="0" id="_cb48e502-9d87-451c-a7cf-4df104f21e51"> 
        <div class="class9 class10" dd:btnfloatingstyle="top-right" dd:entitytexttype="resultval" id="_9e48a58b-3f06-4ce1-8a1e-fb7f4c5d1fc0" contenteditable="true">asdf</div> 
      </div> 
    </div>
  </div> 
</div>
</body>
]

doc = Nokogiri::HTML.parse(html)
puts doc.at_xpath('//div[./span[text()="New String Text"]]').to_html
#=> <div class="class1 class2 class3 class4" style="padding: 4px;" id="_28f331c5-3e42-4944-aa3f-15b68f453a2b"> 
#=>   <span class="class5" style="font-weight: bold; text-decoration: underline;">New String Text</span> 
#=>   <div class="class6" dd:contenttype="content_type1" dd:concept="concept1" id="_8c83d6b3-55a1-4e88-b8af-9578bbfdef83">
#=>     <div class="class7"> 
#=>       <div class="class8" dd:contenttype="content_type2" dd:entityid="0" dd:entityversion="0" id="_cb48e502-9d87-451c-a7cf-4df104f21e51"> 
#=>         <div class="class9 class10" dd:btnfloatingstyle="top-right" dd:entitytexttype="resultval" id="_9e48a58b-3f06-4ce1-8a1e-fb7f4c5d1fc0" contenteditable="true">asdf</div> 
#=>       </div> 
#=>     </div>
#=>   </div> 
#=> </div>