From c2db6d4f3501a172bf34b942783b64f07402d2b2 Mon Sep 17 00:00:00 2001 From: Andrey Antukh Date: Mon, 29 Jun 2020 16:07:48 +0200 Subject: [PATCH] :tada: Add initial exporter (nodejs) application. --- .gitignore | 2 + docker/devenv/files/nginx.conf | 4 + exporter/package-lock.json | 739 ++++++++++++++++++++++++++ exporter/package.json | 20 + exporter/shadow-cljs.edn | 35 ++ exporter/src/app/browser.cljs | 66 +++ exporter/src/app/config.cljs | 20 + exporter/src/app/core.cljs | 36 ++ exporter/src/app/http.cljs | 83 +++ exporter/src/app/http/screenshot.cljs | 43 ++ 10 files changed, 1048 insertions(+) create mode 100644 exporter/package-lock.json create mode 100644 exporter/package.json create mode 100644 exporter/shadow-cljs.edn create mode 100644 exporter/src/app/browser.cljs create mode 100644 exporter/src/app/config.cljs create mode 100644 exporter/src/app/core.cljs create mode 100644 exporter/src/app/http.cljs create mode 100644 exporter/src/app/http/screenshot.cljs diff --git a/.gitignore b/.gitignore index 1b6c72b3d..9cbeebe02 100644 --- a/.gitignore +++ b/.gitignore @@ -22,6 +22,8 @@ node_modules /frontend/out/ /frontend/.shadow-cljs /frontend/resources/public/* +/exporter/target +/exporter/.shadow-cljs /docker/frontend/dist /docker/backend/dist /media diff --git a/docker/devenv/files/nginx.conf b/docker/devenv/files/nginx.conf index 18af20dac..a16bf5c24 100644 --- a/docker/devenv/files/nginx.conf +++ b/docker/devenv/files/nginx.conf @@ -76,6 +76,10 @@ http { proxy_pass http://127.0.0.1:6060/api; } + location /export { + proxy_pass http://127.0.0.1:6061/; + } + location /playground { alias /home/uxbox/uxbox/experiments/; add_header Cache-Control "no-cache, max-age=0"; diff --git a/exporter/package-lock.json b/exporter/package-lock.json new file mode 100644 index 000000000..4aca68886 --- /dev/null +++ b/exporter/package-lock.json @@ -0,0 +1,739 @@ +{ + "name": "uxbox-exporter", + "version": "1.0.0", + "lockfileVersion": 1, + "requires": true, + 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a/exporter/shadow-cljs.edn b/exporter/shadow-cljs.edn new file mode 100644 index 000000000..3fd9962bc --- /dev/null +++ b/exporter/shadow-cljs.edn @@ -0,0 +1,35 @@ +{:dependencies + [[funcool/promesa "5.1.0"] + [funcool/cuerdas "2020.03.26-3"] + [lambdaisland/glogi "1.0.63"] + [metosin/reitit-core "0.5.2"]] + :source-paths ["src"] + :nrepl {:port 3497} + + :builds + {:main + {:target :node-script + :main app.core/main + :output-to "target/exporter.js" + :output-dir "target/exporter/" + :asset-path "/js" + + :devtools {:before-load-async app.core/stop + :after-load app.core/start} + + :compiler-options + {:output-feature-set :es8 + :output-wrapper false} + + :release + {:closure-defines {goog.debug.LOGGING_ENABLED true} + :compiler-options + {:fn-invoke-direct true + :source-map true + :optimizations :simple + :pseudo-names true + :pretty-print true + :anon-fn-naming-policy :off + :source-map-detail-level :all}}}}} + + diff --git a/exporter/src/app/browser.cljs b/exporter/src/app/browser.cljs new file mode 100644 index 000000000..442c1e357 --- /dev/null +++ b/exporter/src/app/browser.cljs @@ -0,0 +1,66 @@ +(ns app.browser + (:require + [lambdaisland.glogi :as log] + [promesa.core :as p] + ["puppeteer-cluster" :as ppc])) + +(def USER-AGENT + (str "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 " + "(KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36")) + +(defn exec! + [browser f] + (.execute ^js browser (fn [props] + (let [page (unchecked-get props "page")] + (f page))))) + +(defn emulate! + [page {:keys [viewport user-agent] + :or {user-agent USER-AGENT}}] + (let [[width height] viewport] + (.emulate page #js {:viewport #js {:width width + :height height} + :userAgent user-agent}))) + +(defn navigate! + ([page url] (navigate! page url nil)) + ([page url {:keys [wait-until] + :or {wait-until "networkidle2"}}] + (.goto ^js page url #js {:waitUntil wait-until}))) + +(defn sleep + [page ms] + (.waitFor ^js page ms)) + +(defn screenshot + ([page] (screenshot page nil)) + ([page {:keys [full-page?] + :or {full-page? true}}] + (.screenshot ^js page #js {:fullPage full-page? :omitBackground true}))) + +(defn set-cookie! + [page {:keys [key value domain]}] + (.setCookie ^js page #js {:name key + :value value + :domain domain})) + +(defn start! + ([] (start! nil)) + ([{:keys [concurrency concurrency-strategy] + :or {concurrency 2 + concurrency-strategy :browser}}] + (let [ccst (case concurrency-strategy + :browser (.-CONCURRENCY_BROWSER ^js ppc/Cluster) + :incognito (.-CONCURRENCY_CONTEXT ^js ppc/Cluster) + :page (.-CONCURRENCY_PAGE ^js ppc/Cluster)) + opts #js {:concurrency ccst + :maxConcurrency concurrency}] + (.launch ^js ppc/Cluster opts)))) + +(defn stop! + [instance] + (p/do! + (.idle ^js instance) + (.close ^js instance) + (log/info :msg "shutdown headless browser") + nil)) diff --git a/exporter/src/app/config.cljs b/exporter/src/app/config.cljs new file mode 100644 index 000000000..20e139cb8 --- /dev/null +++ b/exporter/src/app/config.cljs @@ -0,0 +1,20 @@ +(ns app.config + (:require + ["process" :as process] + [cljs.pprint] + [cuerdas.core :as str])) + +(defn- keywordize + [s] + (-> (str/kebab s) + (str/keyword))) + +(defonce env + (let [env (unchecked-get process "env")] + (persistent! + (reduce #(assoc! %1 (keywordize %2) (unchecked-get env %2)) + (transient {}) + (js/Object.keys env))))) + +(defonce config + {:domain (:app-domain env "localhost:3449")}) diff --git a/exporter/src/app/core.cljs b/exporter/src/app/core.cljs new file mode 100644 index 000000000..a9414c324 --- /dev/null +++ b/exporter/src/app/core.cljs @@ -0,0 +1,36 @@ +(ns app.core + (:require + [lambdaisland.glogi :as log] + [lambdaisland.glogi.console :as glogi-console] + [promesa.core :as p] + [app.http :as http] + [app.config] + [app.browser :as bwr])) + +(glogi-console/install!) +(enable-console-print!) + +(defonce state (atom nil)) + +(defn start + [& args] + (log/info :msg "initializing") + (p/let [browser (bwr/start!) + server (http/start! {:browser browser})] + (reset! state {:http server + :browser browser}))) + +(def main start) + +(defn stop + [done] + ;; an empty line for visual feedback of restart + (js/console.log "") + + (log/info :msg "stoping") + (p/do! + (when-let [instance (:browser @state)] + (bwr/stop! instance)) + (when-let [instance (:http @state)] + (http/stop! instance)) + (done))) diff --git a/exporter/src/app/http.cljs b/exporter/src/app/http.cljs new file mode 100644 index 000000000..fef416e13 --- /dev/null +++ b/exporter/src/app/http.cljs @@ -0,0 +1,83 @@ +(ns app.http + (:require + [promesa.core :as p] + [lambdaisland.glogi :as log] + [app.browser :as bwr] + [app.http.screenshot :refer [bitmap-handler]] + [reitit.core :as r] + ["koa" :as koa] + ["http" :as http]) + (:import + goog.Uri)) + +(defn query-params + "Given goog.Uri, read query parameters into Clojure map." + [^goog.Uri uri] + (let [q (.getQueryData uri)] + (->> q + (.getKeys) + (map (juxt keyword #(.get q %))) + (into {})))) + +(defn- match + [router ctx] + (let [uri (.parse Uri (unchecked-get ctx "originalUrl"))] + (when-let [match (r/match-by-path router (.getPath uri))] + (let [qparams (query-params uri) + params {:path (:path-params match) :query qparams}] + (assoc match + :params params + :query-params qparams))))) + +(defn- handle-response + [ctx {:keys [body headers status] :or {headers {} status 200}}] + (run! (fn [[k v]] (.set ^js ctx k v)) headers) + (set! (.-body ^js ctx) body) + (set! (.-status ^js ctx) status) + nil) + +(defn- wrap-handler + [f extra] + (fn [ctx] + (let [cookies (unchecked-get ctx "cookies") + request (assoc extra :ctx ctx :cookies cookies)] + (-> (p/do! (f request)) + (p/then (fn [rsp] + (when (map? rsp) + (handle-response ctx rsp)))))))) + +(def routes + [["/export" + ["/bitmap" {:handler bitmap-handler}]]]) + +(defn- router-handler + [router] + (fn [{:keys [ctx] :as req}] + (let [route (match router ctx) + request (assoc req + :route route + :params (:params route)) + handler (get-in route [:data :handler])] + (if (and route handler) + (handler request) + {:status 404 + :body "Not found"})))) + +(defn start! + [extra] + (log/info :msg "starting http server" :port 6061) + (let [router (r/router routes) + instance (doto (new koa) + (.use (-> (router-handler router) + (wrap-handler extra)))) + server (.createServer http (.callback instance))] + (.listen server 6061) + (p/resolved server))) + +(defn stop! + [server] + (p/create (fn [resolve] + (.close server (fn [] + (log/info :msg "shutdown http server") + (resolve)))))) + diff --git a/exporter/src/app/http/screenshot.cljs b/exporter/src/app/http/screenshot.cljs new file mode 100644 index 000000000..efd94b5ec --- /dev/null +++ b/exporter/src/app/http/screenshot.cljs @@ -0,0 +1,43 @@ +(ns app.http.screenshot + (:require + [app.browser :as bwr] + [app.config :as cfg] + [promesa.core :as p])) + +(defn- load-and-screenshot + [page url cookie] + (p/do! + (bwr/emulate! page {:viewport [1920 1080]}) + (bwr/set-cookie! page cookie) + (bwr/navigate! page url) + (bwr/sleep page 500) + (.evaluate page (js* "() => document.body.style.background = 'transparent'")) + (p/let [dom (.$ page "#screenshot")] + (.screenshot ^js dom #js {:omitBackground true})))) + +(defn- take-screenshot + [browser {:keys [page-id object-id token]}] + (letfn [(on-browser [page] + (let [url (str "http://" (:domain cfg/config) + "/#/render-object/" + page-id "/" object-id) + cookie {:domain (:domain cfg/config) + :key "auth-token" + :value token}] + (load-and-screenshot page url cookie)))] + (bwr/exec! browser on-browser))) + +(defn bitmap-handler + [{:keys [params browser cookies] :as request}] + (let [page-id (get-in params [:query :page-id]) + object-id (get-in params [:query :object-id]) + token (.get ^js cookies "auth-token")] + (-> (take-screenshot browser {:page-id page-id + :object-id object-id + :token token}) + (p/then (fn [result] + {:status 200 + :body result + :headers {"content-type" "image/png" + "content-length" (alength result)}}))))) +