我正在尝试通过 Nokigiri 从 plist 的 iTunes 库导出中加载歌曲名称:
doc = Nokogiri::XML(打开(文件.路径))
@songs = Array.new
doc.xpath(<XPATH_HERE>).each do |n|
@songs.push(n) #append data to array
end
plist 的开头如下所示:
<plist version="1.0">
<dict>
<key>Major Version</key><integer>1</integer>
<key>Minor Version</key><integer>1</integer>
<key>Date</key><date>2014-10-15T22:52:19Z</date>
<key>Application Version</key><string>11.4</string>
<key>Features</key><integer>5</integer>
<key>Show Content Ratings</key><true/>
<key>Music Folder</key><string>file://localhost/Users/mike/Music/iTunes/iTunes%20Media/</string>
<key>Library Persistent ID</key><string>280B84572DDCF406</string>
<key>Tracks</key>
<dict>
<key>96</key>
<dict>
<key>Track ID</key><integer>96</integer>
<key>Name</key><string>Get Lucky (Daft Punk cover)</string>
<key>Artist</key><string>Daughter</string>
<key>Kind</key><string>MPEG audio file</string>
<key>Size</key><integer>4716638</integer>
<key>Total Time</key><integer>294112</integer>
<key>Date Modified</key><date>2013-11-12T20:54:14Z</date>
<key>Date Added</key><date>2013-12-18T17:56:09Z</date>
<key>Bit Rate</key><integer>128</integer>
<key>Sample Rate</key><integer>44100</integer>
<key>Persistent ID</key><string>C3B1B6F26134C9C1</string>
<key>Track Type</key><string>File</string>
<key>Location</key><string>file://localhost/Users/mike/Music/iTunes/iTunes%20Media/Music/Daughter/Unknown%20Album/Get%20Lucky%20(Daft%20Punk%20cover).mp3</string>
<key>File Folder Count</key><integer>5</integer>
<key>Library Folder Count</key><integer>1</integer>
</dict>
<key>98</key>
<dict>
<key>Track ID</key><integer>98</integer>
<key>Name</key><string>Swimming in Solace (DJ Fergie Ferg Remash)</string>
<key>Kind</key><string>MPEG audio file</string>
我希望从每个轨道加载的是名称键后面的轨道名称字符串。我认为应该工作的 XPath 是
/plist/dict[key[. = 'Tracks']/following-sibling::*[1]]/dict[key/following-sibling::*[1]]/dict[key[. = 'Name']/following-sibling::*[1]]/string
XPath 返回:
<string>Get Lucky (Daft Punk cover)</string>
<string>Daughter</string>
<string>MPEG audio file</string>
<string>C3B1B6F26134C9C1</string>
<string>File</string>
<string>file://localhost/Users/mike/Music/iTunes/iTunes%20Media/Music/Daughter/Unknown%20Album/Get%20Lucky%20(Daft%20Punk%20cover).mp3</string>
<string>Swimming in Solace (DJ Fergie Ferg Remash)</string>
<string>MPEG audio file</string>
看起来,虽然我的 XPath 指定了每个字符串的键,但实际上它不管如何都采用了所有字典的“following-siblings”。
我该怎么做才能使查询更具体,以便 plist 的这一部分返回:
Get Lucky (Daft Punk cover)
和
Swimming in Solace (DJ Fergie Ferg Remash)
最佳答案
这是一种可能的 XPath:
/plist/dict[key='Tracks']/dict/dict/key[.='Name']/following-sibling::string[1]
XPath 的开头可能会有所不同,但我认为最重要的部分是最后两个路径步骤 ( key[.='Name']/following-sibling::string[1]
)。它告诉我们获得最近的 <string>
每个 <key>Name</key>
之后的元素元素。
关于ruby - 带有 dict 元素的 Plist XPath 查询,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26419768/