Cod*_*gMo 11 html-parsing nokogiri xml-parsing
在解析缩进的XML时,从闭合和开始标记之间的空白区域创建非重要的空白文本节点.例如,从以下XML:
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
其字符串表示如下,
"<note>\n <to>Tove</to>\n <from>Jani</from>\n <heading>Reminder</heading>\n <body>Don't forget me this weekend!</body>\n</note>\n"
Document创建以下内容:
#(Document:0x3fc07e4540d8 {
name = "document",
children = [
#(Element:0x3fc07ec8629c {
name = "note",
children = [
#(Text "\n "),
#(Element:0x3fc07ec8089c {
name = "to",
children = [ #(Text "Tove")]
}),
#(Text "\n "),
#(Element:0x3fc07e8d8064 {
name = "from",
children = [ #(Text "Jani")]
}),
#(Text "\n "),
#(Element:0x3fc07e8d588c {
name = "heading",
children = [ #(Text "Reminder")]
}),
#(Text "\n "),
#(Element:0x3fc07e8cf590 {
name = "body",
children = [ #(Text "Don't forget me this weekend!")]
}),
#(Text "\n")]
})]
})
这里有很多类型的空白节点Nokogiri::XML::Text.
我想计算childrenNokogiri XML中每个节点的数量Document,并访问第一个或最后一个子节点,不包括非重要的空格.我希望不要对其进行解析,或那些和显著文本节点,如那些元素中区分<to>,像"Tove".这是我正在寻找的rspec:
require 'nokogiri'
require_relative 'spec_helper'
xml_text = <<XML
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
XML
xml = Nokogiri::XML(xml_text)
def significant_nodes(node)
return 0
end
describe "Stackoverflow Question" do
it "should return the number of significant nodes in nokogiri." do
expect(significant_nodes(xml.css('note'))).to eq 4
end
end
我想知道如何创建该significant_nodes功能.
如果我将XML更改为:
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
<footer></footer>
</note>
然后当我创建时Document,我仍然希望页脚代表; 使用config.noblanks不是一种选择.
tor*_*o2k 15
您可以使用该NOBLANKS选项来解析XML字符串,请考虑以下示例:
require 'nokogiri'
string = "<foo>\n <bar>bar</bar>\n</foo>"
puts string
# <foo>
# <bar>bar</bar>
# </foo>
document_with_blanks = Nokogiri::XML.parse(s)
document_without_blanks = Nokogiri::XML.parse(s) do |config|
config.noblanks
end
document_with_blanks.root.children.each { |child| p child }
#<Nokogiri::XML::Text:0x3ffa4e153dac "\n ">
#<Nokogiri::XML::Element:0x3fdce3f78488 name="bar" children=[#<Nokogiri::XML::Text:0x3fdce3f781f4 "bar">]>
#<Nokogiri::XML::Text:0x3ffa4e15335c "\n">
document_without_blanks.root.children.each { |child| p child }
#<Nokogiri::XML::Element:0x3f81bef42034 name="bar" children=[#<Nokogiri::XML::Text:0x3f81bef43ee8 "bar">]>
该NOBLANKS不该删除空节点:
doc = Nokogiri.XML('<foo><bar></bar></foo>') do |config|
config.noblanks
end
doc.root.children.each { |child| p child }
#<Nokogiri::XML::Element:0x3fad0fafbfa8 name="bar">
OP指出Nokogiri网站(以及libxml网站上)关于解析器选项的文档非常含糊,遵循NOBLANKS选项的行为规范:
require 'rspec/autorun'
require 'nokogiri'
def parse_xml(xml_string)
Nokogiri.XML(xml_string) { |config| config.noblanks }
end
describe "Nokogiri NOBLANKS parser option" do
it "removes whitespace nodes if they have siblings" do
doc = parse_xml("<root>\n <child></child></root>")
expect(doc.root.children.size).to eq(1)
expect(doc.root.children.first).to be_kind_of(Nokogiri::XML::Node)
end
it "doesn't remove whitespaces nodes if they have no siblings" do
doc = parse_xml("<root>\n </root>")
expect(doc.root.children.size).to eq(1)
expect(doc.root.children.first).to be_kind_of(Nokogiri::XML::Text)
end
it "doesn't remove empty nodes" do
doc = parse_xml('<root><child></child></root>')
expect(doc.root.children.size).to eq(1)
expect(doc.root.children.first).to be_kind_of(Nokogiri::XML::Node)
end
end