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penpot/backend/src/app/http/errors.clj
2021-02-22 14:50:01 +01:00

104 lines
3.2 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/.
;;
;; This Source Code Form is "Incompatible With Secondary Licenses", as
;; defined by the Mozilla Public License, v. 2.0.
;;
;; Copyright (c) 2020 UXBOX Labs SL
(ns app.http.errors
"A errors handling for the http server."
(:require
[app.common.uuid :as uuid]
[app.util.log4j :refer [update-thread-context!]]
[clojure.tools.logging :as log]
[cuerdas.core :as str]
[expound.alpha :as expound]))
(defn- explain-error
[error]
(with-out-str
(expound/printer (:data error))))
(defn get-error-context
[request error]
(let [edata (ex-data error)]
(merge
{:id (uuid/next)
:path (:uri request)
:method (:request-method request)
:params (:params request)
:data edata}
(let [headers (:headers request)]
{:user-agent (get headers "user-agent")
:frontend-version (get headers "x-frontend-version" "unknown")})
(when (and (map? edata) (:data edata))
{:explain (explain-error edata)}))))
(defmulti handle-exception
(fn [err & _rest]
(let [edata (ex-data err)]
(or (:type edata)
(class err)))))
(defmethod handle-exception :authentication
[err _]
{:status 401 :body (ex-data err)})
(defmethod handle-exception :restriction
[err _]
{:status 400 :body (ex-data err)})
(defmethod handle-exception :validation
[err req]
(let [header (get-in req [:headers "accept"])
edata (ex-data err)]
(if (and (= :spec-validation (:code edata))
(str/starts-with? header "text/html"))
{:status 400
:headers {"content-type" "text/html"}
:body (str "<pre style='font-size:16px'>"
(explain-error edata)
"</pre>\n")}
{:status 400
:body (cond-> edata
(map? (:data edata))
(-> (assoc :explain (explain-error edata))
(dissoc :data)))})))
(defmethod handle-exception :assertion
[error request]
(let [edata (ex-data error)
cdata (get-error-context request error)]
(update-thread-context! cdata)
(log/errorf error "internal error: assertion (id: %s)" (str (:id cdata)))
{:status 500
:body {:type :server-error
:data (-> edata
(assoc :explain (explain-error edata))
(dissoc :data))}}))
(defmethod handle-exception :not-found
[err _]
{:status 404 :body (ex-data err)})
(defmethod handle-exception :default
[error request]
(let [cdata (get-error-context request error)]
(update-thread-context! cdata)
(log/errorf error "internal error: %s (id: %s)"
(ex-message error)
(str (:id cdata)))
{:status 500
:body {:type :server-error
:hint (ex-message error)
:data (ex-data error)}}))
(defn handle
[error req]
(if (or (instance? java.util.concurrent.CompletionException error)
(instance? java.util.concurrent.ExecutionException error))
(handle-exception (.getCause ^Throwable error) req)
(handle-exception error req)))