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利用 js2xml 获取 script 数据

程序员文章站 2022-05-09 21:16:09
...
import js2xml
from lxml import etree

# script 代码
script = """  $(function () {
        InitZcryListPageLink();
    });
    function InitZcryListPageLink() { 
    var data =
            {
                CurrentPage: 1,
                ItemsPerPage: 10,
                TotalItems: 203,
                TotalPages: 21
            };
        var link = "<td colspan='10' style='text-align:center;color:Red;'>暂无匹配数据</td>";
        if (203 > 0) {
            link = "<td colspan='10' style='text-align:center;'>" + GeneratePagingHtml(data, "LoadZczyryListOfPaging") + "</td>";
        }
        $("#zcrylistpi").html(link);
    }"""

# javascript代码解析，返回一个Element对象
parsed = js2xml.parse(script,encoding='utf-8')
print(parsed)

<Element program at 0x19d2bd094c8>

# 将Element解析为标签形式的代码（类似html标签）
parsed_text = js2xml.pretty_print(parsed)
print(parsed_text)

<program>
  <functioncall>
    <function>
      <identifier name="$"/>
    </function>
    <arguments>
      <funcexpr>
        <identifier/>
        <parameters/>
        <body>
          <functioncall>
            <function>
              <identifier name="InitZcryListPageLink"/>
            </function>
            <arguments/>
          </functioncall>
        </body>
      </funcexpr>
    </arguments>
  </functioncall>
  <funcdecl name="InitZcryListPageLink">
    <parameters/>
    <body>
      <var name="data">
        <object>
          <property name="CurrentPage">
            <number value="1"/>
          </property>
          <property name="ItemsPerPage">
            <number value="10"/>
          </property>
          <property name="TotalItems">
            <number value="203"/>
          </property>
          <property name="TotalPages">
            <number value="21"/>
          </property>
        </object>
      </var>
      <var name="link">
        <string>&lt;td colspan='10' style='text-align:center;color:Red;'&gt;暂无匹配数据&lt;/td&gt;</string>
      </var>
      <if>
        <predicate>
          <binaryoperation operation="&gt;">
            <left>
              <number value="203"/>
            </left>
            <right>
              <number value="0"/>
            </right>
          </binaryoperation>
        </predicate>
        <then>
          <block>
            <assign operator="=">
              <left>
                <identifier name="link"/>
              </left>
              <right>
                <binaryoperation operation="+">
                  <left>
                    <binaryoperation operation="+">
                      <left>
                        <string>&lt;td colspan='10' style='text-align:center;'&gt;</string>
                      </left>
                      <right>
                        <functioncall>
                          <function>
                            <identifier name="GeneratePagingHtml"/>
                          </function>
                          <arguments>
                            <identifier name="data"/>
                            <string>LoadZczyryListOfPaging</string>
                          </arguments>
                        </functioncall>
                      </right>
                    </binaryoperation>
                  </left>
                  <right>
                    <string>&lt;/td&gt;</string>
                  </right>
                </binaryoperation>
              </right>
            </assign>
          </block>
        </then>
      </if>
      <functioncall>
        <function>
          <dotaccessor>
            <object>
              <functioncall>
                <function>
                  <identifier name="$"/>
                </function>
                <arguments>
                  <string>#zcrylistpi</string>
                </arguments>
              </functioncall>
            </object>
            <property>
              <identifier name="html"/>
            </property>
          </dotaccessor>
        </function>
        <arguments>
          <identifier name="link"/>
        </arguments>
      </functioncall>
    </body>
  </funcdecl>
</program>

# 建立xpath树
parsed_tree = etree.HTML(parsed_text)
# 通过xpath获取数据
data = parsed_tree.xpath("//property[@name='TotalPages']/number/@value")[0]
print(data)

21
相关标签： 爬虫学习 爬虫 python

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