fixed leaky app.state on the server-side. fixes #928

app/capabilities.js

@@ -1,3 +1,5 @@
+import { browserName } from './utils';
+
 async function checkCrypto() {
   try {
     const key = await crypto.subtle.generateKey(
@@ -76,10 +78,7 @@ export default async function capabilities() {
     streamDownload:
       nativeStreams &&
       'serviceWorker' in navigator &&
-      !(
+      browserName() !== 'safari',
-        /safari/i.test(navigator.userAgent) &&
-        !/chrome/i.test(navigator.userAgent)
-      ),
     multifile: nativeStreams || polyStreams
   };
 }

app/main.js

@@ -1,6 +1,6 @@
 import 'fast-text-encoding'; // MS Edge support
 import 'fluent-intl-polyfill';
-import app from './routes';
+import routes from './routes';
 import capabilities from './capabilities';
 import locale from '../common/locales';
 import fileManager from './fileManager';
@@ -14,6 +14,7 @@ import './main.css';
 import User from './user';
 
 (async function start() {
+  const app = routes();
   if (navigator.doNotTrack !== '1' && window.RAVEN_CONFIG) {
     Raven.config(window.SENTRY_ID, window.RAVEN_CONFIG).install();
   }

app/routes/index.js

@@ -11,6 +11,8 @@ const profile = require('../templates/userAccount');
 const modal = require('../templates/modal');
 
 nanotiming.disabled = true;
+
+module.exports = function() {
   const app = choo();
 
   function banner(state, emit) {
@@ -86,5 +88,5 @@ app.route('/api/fxa/oauth', async function(state, emit) {
     }
   });
   app.route('*', body(require('../pages/notFound')));
-
+  return app;
-module.exports = app;
+};

server/routes/pages.js

@@ -10,11 +10,11 @@ function stripEvents(str) {
 
 module.exports = {
   index: function(req, res) {
-    res.send(stripEvents(routes.toString('/', state(req))));
+    res.send(stripEvents(routes().toString('/', state(req))));
   },
 
   blank: function(req, res) {
-    res.send(stripEvents(routes.toString('/blank', state(req))));
+    res.send(stripEvents(routes().toString('/blank', state(req))));
   },
 
   download: async function(req, res, next) {
@@ -24,7 +24,7 @@ module.exports = {
       res.set('WWW-Authenticate', `send-v1 ${nonce}`);
       res.send(
         stripEvents(
-          routes.toString(
+          routes().toString(
             `/download/${id}`,
             Object.assign(state(req), {
               downloadMetadata: { nonce, pwd }
@@ -40,7 +40,7 @@ module.exports = {
   unsupported: function(req, res) {
     res.send(
       stripEvents(
-        routes.toString(
+        routes().toString(
           `/unsupported/${req.params.reason}`,
           Object.assign(state(req), { fira: true })
         )
@@ -49,10 +49,10 @@ module.exports = {
   },
 
   legal: function(req, res) {
-    res.send(stripEvents(routes.toString('/legal', state(req))));
+    res.send(stripEvents(routes().toString('/legal', state(req))));
   },
 
   notfound: function(req, res) {
-    res.status(404).send(stripEvents(routes.toString('/404', state(req))));
+    res.status(404).send(stripEvents(routes().toString('/404', state(req))));
   }
 };