在 Linux 中从 .XML 文件中获取价值

Question

• 任何人都有一个很好的解决方案：

• 我想要值：/PlayDirList/PlayDir.1378803204来自这个 XML。

  <settings>
  
      <setting id="ask_set_logo_to_bg" value="false" />
      <setting id="check_update_interval" value="0" />
      <setting id="clientid" value="DMDS-MVG-0001" />
      <setting id="guinotify" value="false" />
      <setting id="pil_is_broken" value="false" />
      <setting id="playdir" value="/PlayDirList/PlayDir.1378803204" />
      <setting id="runonstartup" value="true" />
      <setting id="schedule_poweroff" value="false" />
      <setting id="schedule_poweroff1" value="false" />
      <setting id="schedule_poweroff2" value="false" />
      <setting id="schedule_poweroff_custom" value="false" />
      <setting id="schedule_poweroff_from_day0" value="1" />
      <setting id="schedule_poweroff_from_day1" value="5" />
      <setting id="schedule_poweroff_from_day2" value="5" />
      <setting id="schedule_poweroff_hour0" value="23" />
      <setting id="schedule_poweroff_hour1" value="23" />
      <setting id="schedule_poweroff_hour2" value="23" />
      <setting id="schedule_poweroff_min0" value="0" />
      <setting id="schedule_poweroff_min1" value="0" />
      <setting id="schedule_poweroff_min2" value="0" />
      <setting id="schedule_poweroff_to_day0" value="0" />
      <setting id="schedule_poweroff_to_day1" value="6" />
      <setting id="schedule_poweroff_to_day2" value="0" />
      <setting id="stat_report_interval" value="600" />
      <setting id="sync_screenshot" value="true" />
      <setting id="use_external_downloader" value="true" />
      <setting id="boot_time" value="2013-10-07 09:29:23" />
  </settings>
  

• 它是一个 Linux 机器，我不想安装任何额外的应用程序来完成它。所以一个好的 perl、python 或 bash 解决方案是首选。

Answer 1

您可以xmllint为此使用XPATH：

xmllint --xpath //setting[id='playdir']/@value xmlfilename.xml

或者如果您使用的是python，

import libxml2

doc = libxml2.parseFile('foo.xml')
for setting in doc.xpathEval('//setting[id="playdir"]'):
  print setting.prop('value')