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Diffstat (limited to 'actionpack/lib/action_controller/metal/feature_policy.rb')
| -rw-r--r-- | actionpack/lib/action_controller/metal/feature_policy.rb | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/actionpack/lib/action_controller/metal/feature_policy.rb b/actionpack/lib/action_controller/metal/feature_policy.rb new file mode 100644 index 0000000000..a627eabea6 --- /dev/null +++ b/actionpack/lib/action_controller/metal/feature_policy.rb @@ -0,0 +1,46 @@ +# frozen_string_literal: true + +module ActionController #:nodoc: + # HTTP Feature Policy is a web standard for defining a mechanism to + # allow and deny the use of browser features in its own context, and + # in content within any <iframe> elements in the document. + # + # Full details of HTTP Feature Policy specification and guidelines can + # be found at MDN: + # + # https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Feature-Policy + # + # Examples of usage: + # + # # Global policy + # Rails.application.config.feature_policy do |f| + # f.camera :none + # f.gyroscope :none + # f.microphone :none + # f.usb :none + # f.fullscreen :self + # f.payment :self, "https://secure.example.com" + # end + # + # # Controller level policy + # class PagesController < ApplicationController + # feature_policy do |p| + # p.geolocation "https://example.com" + # end + # end + module FeaturePolicy + extend ActiveSupport::Concern + + module ClassMethods + def feature_policy(**options, &block) + before_action(options) do + if block_given? + policy = request.feature_policy.clone + yield policy + request.feature_policy = policy + end + end + end + end + end +end |