javascript - 如何使用 lxml 从文本区域获取 javascript 代码？

Question

我正在尝试从文本区域中提取 javascript 代码，这是我的代码:

 def getCode(self,request):
    #print "Extracting URL: " + request
    opener = self.login(self.username,self.password)
    html = etree.HTML(opener.open(request).read())

    textarea = html.xpath('//*[@id="codeText"]/text()')        
    for code in textarea:
        return code

这是我尝试从中提取的 html 代码:

<textarea onclick="javascript: this.select();" id="codeText" style="height: 300px;width:500px;">            <!-- Clickon Affiliate code start here -->
  <object type="application/x-shockwave-flash" data="http://banners.clickon.co.il/LOVELY2_banners/swf/JWFLZxzNxjclWGP.swf?url=http://track.clickon.co.il/click/Q8uTE8BXZz1pskj/JWFLZxzNxjclWGP/TsQ8uTE8BXZz1pskjtS" width="728" height="90">
    <param name="movie" value="http://banners.clickon.co.il/LOVELY2_banners/swf/JWFLZxzNxjclWGP.swf?url=http://track.clickon.co.il/click/Q8uTE8BXZz1pskj/JWFLZxzNxjclWGP/TsQ8uTE8BXZz1pskjtS" />
    <param name="scale" value="exactfit" />
    <param name="wmode" value="transparent" />
  </object>
  <img alt="" style="visibility: hidden;" src="http://track.clickon.co.il/imp/Q8uTE8BXZz1pskj/JWFLZxzNxjclWGP/TsQ8uTE8BXZz1pskjtS" />

</textarea>

如果文本区域仅包含链接或文本，我的 getCode 函数运行良好，但如果它包含 java 脚本代码，我将无法提取它。你能帮帮我吗？

谢谢，

亚尼夫。

Answer 1

在代码中，for 循环返回得太早；仅返回第一个文本。

如果您想要所有标签和文本，请尝试以下操作。

import lxml.etree as etree

htmlchunk = '''
<textarea onclick="javascript: this.select();" id="codeText" style="height: 300px;width:500px;">            <!-- Clickon Affiliate code start here -->
        <object type="application/x-shockwave-flash" data="http://banners.clickon.co.il/LOVELY2_banners/swf/JWFLZxzNxjclWGP.swf?url=http://track.clickon.co.il/click/Q8uTE8BXZz1pskj/JWFLZxzNxjclWGP/TsQ8uTE8BXZz1pskjtS" width="728" height="90">
            <param name="movie" value="http://banners.clickon.co.il/LOVELY2_banners/swf/JWFLZxzNxjclWGP.swf?url=http://track.clickon.co.il/click/Q8uTE8BXZz1pskj/JWFLZxzNxjclWGP/TsQ8uTE8BXZz1pskjtS" />
            <param name="scale" value="exactfit" />
            <param name="wmode" value="transparent" />
        </object>
        <img alt="" style="visibility: hidden;" src="http://track.clickon.co.il/imp/Q8uTE8BXZz1pskj/JWFLZxzNxjclWGP/TsQ8uTE8BXZz1pskjtS" />

    </textarea>
'''

html = etree.HTML(htmlchunk)
textarea, = html.xpath('//*[@id="codeText"]')
print(textarea.text + ''.join(etree.tostring(code) for code in textarea) + textarea.tail)

输出:

            <!-- Clickon Affiliate code start here -->
        <object type="application/x-shockwave-flash" data="http://banners.clickon.co.il/LOVELY2_banners/swf/JWFLZxzNxjclWGP.swf?url=http://track.clickon.co.il/click/Q8uTE8BXZz1pskj/JWFLZxzNxjclWGP/TsQ8uTE8BXZz1pskjtS" width="728" height="90">
            <param name="movie" value="http://banners.clickon.co.il/LOVELY2_banners/swf/JWFLZxzNxjclWGP.swf?url=http://track.clickon.co.il/click/Q8uTE8BXZz1pskj/JWFLZxzNxjclWGP/TsQ8uTE8BXZz1pskjtS"/>
            <param name="scale" value="exactfit"/>
            <param name="wmode" value="transparent"/>
        </object>
        <img alt="" style="visibility: hidden;" src="http://track.clickon.co.il/imp/Q8uTE8BXZz1pskj/JWFLZxzNxjclWGP/TsQ8uTE8BXZz1pskjtS"/>