Initial commit

config/initializers/content_security_policy.rb

@@ -0,0 +1,36 @@
+# Be sure to restart your server when you modify this file.
+
+# Define an application-wide content security policy
+# For further information see the following documentation
+# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
+
+Rails.application.config.content_security_policy do |policy|
+  policy.default_src :self, :https, AppHost.new.domain_with_port, :unsafe_inline
+  policy.font_src    :self, :https, :data
+  policy.img_src     :self, :https, :data
+  policy.object_src  :self
+  policy.script_src  :self, :https, AppHost.new.domain_with_port, "https://stream.mux.com", :blob, :unsafe_eval
+  policy.media_src   :self, :https, AppHost.new.domain_with_port, "https://stream.mux.com", :data, :blob
+  # policy.style_src   :self, :https, :unsafe_inline
+  # If you are using webpack-dev-server then specify webpack-dev-server host
+  # policy.connect_src :self, :https, "http://localhost:3035", "ws://localhost:3035" if Rails.env.development?
+  policy.connect_src :self, :https, "ws://#{AppHost.new.domain_with_port}", "wss://#{AppHost.new.domain_with_port}"
+
+  # Specify URI for violation reports
+  # policy.report_uri "/csp-violation-report-endpoint"
+end
+
+# If you are using UJS then enable automatic nonce generation
+Rails.application.config.content_security_policy_nonce_generator = -> (request) do
+  # Use the same CSP nonce for Turbolinks requests
+  if request.env["HTTP_TURBOLINKS_REFERRER"].present?
+    request.env["HTTP_X_TURBOLINKS_NONCE"]
+  else
+    SecureRandom.base64(16)
+  end
+end
+
+# Report CSP violations to a specified URI
+# For further information see the following documentation:
+# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only
+# Rails.application.config.content_security_policy_report_only = true