penpot/backend/src/app/http/assets.clj
2022-02-22 13:05:41 +01:00

129 lines
3.9 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) UXBOX Labs SL
(ns app.http.assets
"Assets related handlers."
(:require
[app.common.exceptions :as ex]
[app.common.spec :as us]
[app.common.uri :as u]
[app.db :as db]
[app.metrics :as mtx]
[app.storage :as sto]
[app.util.async :as async]
[app.util.time :as dt]
[app.worker :as wrk]
[clojure.spec.alpha :as s]
[integrant.core :as ig]
[promesa.core :as p]))
(def ^:private cache-max-age
(dt/duration {:hours 24}))
(def ^:private signature-max-age
(dt/duration {:hours 24 :minutes 15}))
(defn coerce-id
[id]
(let [res (us/uuid-conformer id)]
(when-not (uuid? res)
(ex/raise :type :not-found
:hint "object not found"))
res))
(defn- get-file-media-object
[{:keys [pool] :as storage} id]
(let [id (coerce-id id)
mobj (db/exec-one! pool ["select * from file_media_object where id=?" id])]
(when-not mobj
(ex/raise :type :not-found
:hint "object does not found"))
mobj))
(defn- serve-object
[{:keys [storage] :as cfg} obj]
(let [mdata (meta obj)
backend (sto/resolve-backend storage (:backend obj))]
(case (:type backend)
:db
{:status 200
:headers {"content-type" (:content-type mdata)
"cache-control" (str "max-age=" (inst-ms cache-max-age))}
:body (sto/get-object-bytes storage obj)}
:s3
(let [{:keys [host port] :as url} (sto/get-object-url storage obj {:max-age signature-max-age})]
{:status 307
:headers {"location" (str url)
"x-host" (cond-> host port (str ":" port))
"cache-control" (str "max-age=" (inst-ms cache-max-age))}
:body ""})
:fs
(let [purl (u/uri (:assets-path cfg))
purl (u/join purl (sto/object->relative-path obj))]
{:status 204
:headers {"x-accel-redirect" (:path purl)
"content-type" (:content-type mdata)
"cache-control" (str "max-age=" (inst-ms cache-max-age))}
:body ""}))))
(defn- generic-handler
[{:keys [storage executor] :as cfg} request kf]
(async/with-dispatch executor
(let [id (get-in request [:path-params :id])
mobj (get-file-media-object storage id)
obj (sto/get-object storage (kf mobj))]
(if obj
(serve-object cfg obj)
{:status 404 :body ""}))))
(defn objects-handler
[{:keys [storage executor] :as cfg} request respond raise]
(-> (async/with-dispatch executor
(let [id (get-in request [:path-params :id])
id (coerce-id id)
obj (sto/get-object storage id)]
(if obj
(serve-object cfg obj)
{:status 404 :body ""})))
(p/then respond)
(p/catch raise)))
(defn file-objects-handler
[cfg request respond raise]
(-> (generic-handler cfg request :media-id)
(p/then respond)
(p/catch raise)))
(defn file-thumbnails-handler
[cfg request respond raise]
(-> (generic-handler cfg request #(or (:thumbnail-id %) (:media-id %)))
(p/then respond)
(p/catch raise)))
;; --- Initialization
(s/def ::storage some?)
(s/def ::assets-path ::us/string)
(s/def ::cache-max-age ::dt/duration)
(s/def ::signature-max-age ::dt/duration)
(defmethod ig/pre-init-spec ::handlers [_]
(s/keys :req-un [::storage
::wrk/executor
::mtx/metrics
::assets-path
::cache-max-age
::signature-max-age]))
(defmethod ig/init-key ::handlers
[_ cfg]
{:objects-handler (partial objects-handler cfg)
:file-objects-handler (partial file-objects-handler cfg)
:file-thumbnails-handler (partial file-thumbnails-handler cfg)})