CODEWITHSUNDEEP
ruby-on-railsnokogiri
Mary
Mary

Reputation: 134

Nokogiri add attribute to an html tag without damaging its content

I'm new to ruby and need to parse html content and update it as required (add an attribute to 'body' tag). I have written the following code

def index
    url = "/home/employee/index.html"
    doc = Nokogiri::HTML::Document.parse(url)
    doc.at_css("body").set_attribute("ng-init", "menu.inspired = 'true'")
    File.open('/home/employee/index.txt','w') {|f| doc.write_html_to f}
    @content=doc.to_html
end

The output written in the file is the following

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html><body ng-init="menu.inspired = 'true'"><p>/home/employee/index.html</p></body></html>

The output file contains the added attribute, but the content of the html file seems to be overwritten. So I need to figure out where is the mistake I have made.

Upvotes: 1

Views: 753

Answers (1)

max
max

Reputation: 102001

Your are not actually manipulating the document from the file /home/employee/index.html - Rather Nokogiri::HTML::Document.parse(url) creates a skeleton HTML document with the body "/home/employee/index.html".

You need to read the document from file first.

def index
    # note that this is a file path! Not an URL.
    path = "/home/employee/index.html"
    doc = File.open(path) { |f| Nokogiri::HTML(f) }
    doc.at_css("body").set_attribute("ng-init", "menu.inspired = 'true'")
    File.open(path,'w') {|f| doc.write_html_to f}
    @content=doc.to_html
end

See:

Upvotes: 1

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