First the xml: http://api.chartlyrics.com/apiv1.asmx//GetLyric?lyricId=90&lyricCheckSum=9600c891e35f602eb6e1605fb7b5229e
doc = Nokogiri::XML(open("http://api.chartlyrics.com/apiv1.asmx//GetLyric?lyricId=90&lyricCheckSum=9600c891e35f602eb6e1605fb7b5229e"))
成功将占用文件内容。
在这一点之后,我无法从中获取和收集 gr数据,我无法确定为什么?
例如,预计:
doc.xpath("//LyricArtist")
击退艺术家,但不是。
我曾尝试过其他饲料,如拖欠的RSS供暖,任何电压装置都提供,如果我做这样的事情:
doc.xpath("//link")
我收到了所有“链接”的清单。
我肯定没有东西,并热爱你们的投入。 感谢!
XML要素是:名称空间的合格,并须遵守
如果你认为XML,你会注意到文件内容有了一个名称空间:
<GetLyricResult xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://api.chartlyrics.com/">
为了对一个名称空间具有约束力的要素进行匹配,你要么需要宣布一个名称空间,该名称空间受《国际仲裁裁决汇编》约束,在你XPATH的表述中使用该名称空间,要么使用XPATH的表述,要么忽视名称空间,要么不同。
无论已申报的名称空间如何,你都可以对内容进行匹配,然后使用<代码>当地名称()与元素名称匹配。
//*[local-name()= LyricArtist ]
如果你想更确切,你可以使用<代码>当地名称()与元素名称和<代码>,即:space-uri(,与已申报的地名空间相匹配。
//*[local-name()= LyricArtist and namespace-uri()= http://api.chartlyrics.com/ ]
第二个例子将防止将受不同名称空间约束的相同<代码>当地名称/代码>的内容相匹配。 并非这一具体问题,而是你们应当知道的问题。 姓名空间被用于独一无二地限定节点,允许不同的词汇在不担心冲突的情况下使用相同的“名称”。
它就像在名称或图象上的东西。
uri = "http://api.chartlyrics.com/apiv1.asmx//GetLyric?LyricId=90&lyricCheckSum=9600c891e35f602eb6e1605fb7b5229e"
x = open(uri).read()
x = x.sub(/<.*?>/, ).sub(/<.*?>/, <GetLyricResult> )
doc = Nokogiri::XML(x)
puts doc.xpath( //LyricArtist ).text()
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