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72 lines
2.6 KiB
Ruby
72 lines
2.6 KiB
Ruby
# Define an application-wide content security policy
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# For further information see the following documentation
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# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
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def host_to_url(str)
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"http#{Rails.configuration.x.use_https ? 's' : ''}://#{str}" unless str.blank?
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end
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base_host = Rails.configuration.x.web_domain
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assets_host = Rails.configuration.action_controller.asset_host
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assets_host ||= host_to_url(base_host)
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media_host = host_to_url(ENV['S3_ALIAS_HOST'])
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media_host ||= host_to_url(ENV['S3_CLOUDFRONT_HOST'])
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media_host ||= host_to_url(ENV['S3_HOSTNAME']) if ENV['S3_ENABLED'] == 'true'
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media_host ||= assets_host
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Rails.application.config.content_security_policy do |p|
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p.base_uri :none
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p.default_src :none
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p.frame_ancestors :none
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p.font_src :self, assets_host
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p.img_src :self, :https, :data, :blob, assets_host
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p.style_src :self, assets_host
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p.media_src :self, :https, :data, assets_host
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p.frame_src :self, :https
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p.manifest_src :self, assets_host
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if Rails.env.development?
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webpacker_urls = %w(ws http).map { |protocol| "#{protocol}#{Webpacker.dev_server.https? ? 's' : ''}://#{Webpacker.dev_server.host_with_port}" }
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p.connect_src :self, :data, :blob, assets_host, media_host, Rails.configuration.x.streaming_api_base_url, *webpacker_urls
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p.script_src :self, :unsafe_inline, :unsafe_eval, assets_host
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p.child_src :self, :blob, assets_host
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p.worker_src :self, :blob, assets_host
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else
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p.connect_src :self, :data, :blob, assets_host, media_host, Rails.configuration.x.streaming_api_base_url
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p.script_src :self, assets_host
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p.child_src :self, :blob, assets_host
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p.worker_src :self, :blob, assets_host
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end
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end
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# Report CSP violations to a specified URI
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# For further information see the following documentation:
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# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only
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# Rails.application.config.content_security_policy_report_only = true
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Rails.application.config.content_security_policy_nonce_generator = -> request { SecureRandom.base64(16) }
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# Monkey-patching Rails 5
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module ActionDispatch
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class ContentSecurityPolicy
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def nonce_directive?(directive)
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directive == 'style-src'
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end
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end
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end
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# Rails 6 would require the following instead:
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# Rails.application.config.content_security_policy_nonce_directives = %w(style-src)
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PgHero::HomeController.content_security_policy do |p|
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p.script_src :self, :unsafe_inline, assets_host
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p.style_src :self, :unsafe_inline, assets_host
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end
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PgHero::HomeController.after_action do
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request.content_security_policy_nonce_generator = nil
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end
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