Checking HTML and CSS validation when uploading files in Ruby on Rails

Currently, the project I am working on enables users to upload HTML templates along with CSS, which are then processed by the application for a variety of tasks. While the uploading process is functioning properly, I am in search of a method to validate the uploaded HTML and CSS files. I have come across various gems and plugins designed for integration into unit tests, such as https://github.com/realityforge/rails-assert-valid-asset, but I am specifically seeking a solution that can be implemented to validate files upon upload in a live production environment.

Is there a tool or system that can perform this type of validation?

htmlcssruby-on-railsvalidation

Answer №1

If you want to ensure your CSS code is valid, you can make use of the w3c_validators gem and the World Wide Web Consortium’s online validation service. Check out the gem here: https://github.com/alexdunae/w3c_validators.

Take a look at this snippet from the CSS section of the gem's Readme:

require 'w3c_validators'

include W3CValidators

@validator = CSSValidator.new

results = @validator.validate_text('body { margin: 0px; }')

if results.errors.length > 0
  results.errors.each do |err|
    puts err.to_s
  end
else
  puts 'Valid!'
end

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