Travis Build Status Gem Version MIT licensed

Content Security Policy string builder. Create rich Content Security Policies headers using this easy to use builder class.


Add this line to your application's Gemfile:

gem 'csp_builder'

And then execute:

$ bundle

Or install it yourself as:

$ gem install csp_builder


Here is a quick example. Please see the docs for more details!

csp = CspBuilder.new.
  script_src("https://*.cloudfront.net", :self).

# Get the compiled CSP string:
# "script-src https://*.cloudfront.net 'self'; style-src https://*.cloudfront.net; img-src *; frame-ancestors 'self'; upgrade-insecure-requests"

More examples using middleware and controllers coming soon!


After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.


Bug reports and pull requests are welcome on GitHub at https://github.com/Sigient/csp_builder. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.


The gem is available as open source under the terms of the MIT License.