class ActionDispatch::ContentSecurityPolicy

policy.report_uri "/csp-violation-report-endpoint"

directive. Violation reports will be sent to the specified URI:
Enable the {report-uri}[https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/report-uri]

def report_uri(uri)
  @directives["report-uri"] = [uri]
end