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penpot/backend/src/app/http/security.clj
2025-10-07 12:47:14 +02:00

40 lines
1.1 KiB
Clojure

;; This Source Code Form is subject to the terms of the Mozilla Public
;; License, v. 2.0. If a copy of the MPL was not distributed with this
;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
;;
;; Copyright (c) KALEIDOS INC
(ns app.http.security
"Additional security layer middlewares"
(:require
[app.config :as cf]
[yetti.request :as yreq]
[yetti.response :as yres]))
(def ^:private safe-methods
#{:get :head :options})
(defn- wrap-sec-fetch-metadata
"Sec-Fetch metadata security layer middleware"
[handler]
(fn [request]
(let [site (yreq/get-header request "sec-fetch-site")]
(cond
(= site "same-origin")
(handler request)
(or (= site "same-site")
(= site "cross-site"))
(if (contains? safe-methods (yreq/method request))
(handler request)
{::yres/status 403})
:else
(handler request)))))
(def sec-fetch-metadata
{:name ::sec-fetch-metadata
:compile (fn [_ _]
(when (contains? cf/flags :sec-fetch-metadata-middleware)
wrap-sec-fetch-metadata))})