La transición de Scrubyt a Nokogiri- Escribir a XML o Hash?
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18-09-2019 - |
Pregunta
Estoy tratando de hacer la transición de este trozo de código de scrubyt a Nokogiri, y estoy atascado tratando de escribir mis resultados ya sea a un hash o xml. En scrubyt se ve como la siguiente:
require 'rubygems'
require 'scrubyt'
result_data = Scrubyt::Extractor.define do
fetch "http://www.amazon.com/gp/offer-listing/0061673730"
results "//div[@class='resultsset']" do
item "//tbody/tr" do
condition "//div[@class = 'Condition']"
price "//span[@class = 'price']"
shipping "//span[@class = 'price_shipping']"
end
end
end
@description = result_data.to_xml
return @description
end
Con nokogiri puedo analizar la información que quiero, pero no parece ser una forma rápida de devolver los artículos en un documento de hash o xml. Esto es todo lo que tengo en nokogiri.
require 'rubygems'
require 'nokogiri'
require 'open-uri'
doc = Nokogiri::HTML(open('http://www.amazon.com/gp/offer-listing/0061673730'))
doc.css('div.condition, span.price, span.price_shipping ').each do |item|
puts item.content
end
¿Cómo se podría devolver información al elemento XML o un hash?
Solución
Puede utilizar el Constructor para construir XML.
builder = Nokogiri::XML::Builder.new do |xml|
xml.root {
xml.items {
doc.css('div.condition, span.price, span.price_shipping').each do |o|
xml.item_content = o
end
}
}
end
puts builder.to_xml
Otros consejos
lo descubrió ...
require 'rubygems'
require 'nokogiri'
require 'open-uri'
doc = Nokogiri::HTML(open('http://www.amazon.com/gp/offer-listing/0061673730'))
builder = Nokogiri::XML::Builder.new do |xml|
xml.root {
doc.xpath('//tbody[@class="result"]').each do |res|
xml.result {
res.css('span.price').each do |p|
xml.price = p.content
end
res.css('span.price_shipping').each do |s|
xml.ship = s.content
end
}
end
}
end
puts builder.to_xml
Resultados:
<?xml version="1.0"?>
<root>
<result>
<price=>$6.09</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$6.48</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$7.12</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$7.31</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$7.52</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$7.52</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$11.53</price=>
</result>
<result>
<price=>$7.56</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$7.61</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$7.61</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$7.95</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$7.95</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$8.59</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$8.99</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$10.05</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$10.32</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$10.32</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$10.55</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$10.56</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$11.42</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$11.59</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$11.90</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$11.95</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$12.07</price=>
<ship=>+ $3.99</ship=>
</result>
<result>
<price=>$12.35</price=>
<ship=>+ $3.99</ship=>
</result>
</root>
Gracias! Eso es exactamente lo que necesito. Tengo problemas de bucle correctamente, sin embargo.
require 'rubygems'
require 'nokogiri'
require 'open-uri'
doc = Nokogiri::HTML(open('http://www.amazon.com/gp/offer-listing/0061673730'))
builder = Nokogiri::XML::Builder.new do |xml|
xml.root {
xml.item {
doc.css('span.price').each do |o|
xml.price = o
doc.css('span.price_shipping').each do |o|
end
end
}
}
end
puts builder.to_xml
que devuelve la siguiente:
<?xml version="1.0"?>
<root>
<item>
<price=><span class="price">$6.09</span></price=>
<price=><span class="price">$6.48</span></price=>
<price=><span class="price">$11.95</span></price=>
<ship=><span class="price_shipping">+ $3.99</span></ship=>
<ship=><span class="price_shipping">+ $3.99</span></ship=>
<ship=><span class="price_shipping">+ $3.99</span></ship=>
</item>
</root>
¿Cómo voy a volver a escribir el código para devolver algo como esto:
<?xml version="1.0"?>
<root>
<item>
<price=><span class="price">$6.09</span></price=>
<ship=><span class="price_shipping">+ $3.99</span></ship=>
</item>
<item>
<price=><span class="price">$6.48</span></price=>
<ship=><span class="price_shipping">+ $3.99</span></ship=>
</item>
<item>
<price=><span class="price">$11.95</span></price=>
<ship=><span class="price_shipping">+ $3.99</span></ship=>
</item>
</root>
es posible que desee omitir "=" en xml.price = p.content