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Editorial Team
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Asked: 2026-05-24T09:27:04+00:00

I am trying to get all the scripts declared in the head section of

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I am trying to get all the scripts declared in the head section of a given html, but no matter how I try, it always returns nil.

doc = Nokogiri::HTML(open('http://www.walmart.com.br/'))

puts doc.at('body') # returns nill

doc.xpath('//html/head').each # this also will never iterate

Any suggestions?

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1 Answer

  1. Editorial Team

    The page’s DOCTYPE isn’t valid, so Nokogiri parses the page improperly. A quick, inefficient fix to the problem:

    require 'nokogiri'
require 'open-uri'
require 'pp'

# Request the HTML before parsing
html = open("http://www.walmart.com.br/").read

# Replace original DOCTYPE with a valid DOCTYPE
html = html.sub(/^<!DOCTYPE html(.*)$/, '<!DOCTYPE html>')

# Parse
doc = Nokogiri::HTML(html)

# Party.
pp doc.xpath("/html/head")
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