问题
How can I remove <img> tags using Nokogiri?
I have the following code but it wont work:
# str = '<img src="canadascapital.gc.ca/data/2/rec_imgs/5005_Pepsi_H1NB.gif"/…; testt<a href="#">test</a>tfbu'
f = Nokogiri::XML.fragment(str)
f.search('//img').each do |node|
node.remove
end
puts f
回答1:
have a try!
f = Nokogiri::XML.fragment(str)
f.search('.//img').remove
puts f
回答2:
I prefer CSS over XPath, as it's usually much more readable. Switching to CSS:
require 'nokogiri'
doc = Nokogiri::HTML('<html><body><img src="foo"><img src="bar"></body></html>')
After parsing the document looks like:
doc.to_html
# => "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\">\n<html><body>\n<img src=\"foo\"><img src=\"bar\">\n</body></html>\n"
Removing the <img> tags:
doc.search('img').each do |src|
src.remove
end
Results in:
doc.to_html
# => "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\">\n<html><body></body></html>\n"
来源：https://stackoverflow.com/questions/1708504/how-do-i-remove-a-node-with-nokogiri