add null checks and new body parser

services/filestore/app.coffee

@@ -1,4 +1,5 @@
 express = require('express')
+bodyParser = require "body-parser"
 logger = require('logger-sharelatex')
 logger.initialize("filestore")
 settings = require("settings-sharelatex")
@@ -61,7 +62,7 @@ app.use (req, res, next) ->
 app.get  "/project/:project_id/file/:file_id", keyBuilder.userFileKey, fileController.getFile
 app.post "/project/:project_id/file/:file_id", keyBuilder.userFileKey, fileController.insertFile
 
-app.put "/project/:project_id/file/:file_id", keyBuilder.userFileKey, express.bodyParser(), fileController.copyFile
+app.put "/project/:project_id/file/:file_id", keyBuilder.userFileKey, bodyParser.json(), fileController.copyFile
 app.del "/project/:project_id/file/:file_id", keyBuilder.userFileKey, fileController.deleteFile
 
 app.get  "/template/:template_id/v/:version/:format", keyBuilder.templateFileKey, fileController.getFile
@@ -72,7 +73,7 @@ app.post "/template/:template_id/v/:version/:format", keyBuilder.templateFileKey
 app.get  "/project/:project_id/public/:public_file_id", keyBuilder.publicFileKey, fileController.getFile
 app.post "/project/:project_id/public/:public_file_id", keyBuilder.publicFileKey, fileController.insertFile
 
-app.put "/project/:project_id/public/:public_file_id", keyBuilder.publicFileKey, express.bodyParser(), fileController.copyFile
+app.put "/project/:project_id/public/:public_file_id", keyBuilder.publicFileKey, bodyParser.json(), fileController.copyFile
 app.del "/project/:project_id/public/:public_file_id", keyBuilder.publicFileKey, fileController.deleteFile
 
 app.get "/project/:project_id/size", keyBuilder.publicProjectKey, fileController.directorySize

services/filestore/app/coffee/PersistorManager.coffee

@@ -2,7 +2,7 @@ settings = require("settings-sharelatex")
 logger = require("logger-sharelatex")
 
 # assume s3 if none specified
-settings.filestore.backend ||= "s3"
+settings?.filestore?.backend ||= "s3"
 
 
 logger.log backend:settings.filestore.backend, "Loading backend"

services/filestore/package.json

@@ -41,7 +41,8 @@
     "settings-sharelatex": "git+https://github.com/sharelatex/settings-sharelatex.git#v1.0.0",
     "stream-buffers": "~0.2.5",
     "underscore": "~1.5.2",
-    "mocha": "^4.0.1"
+    "mocha": "^4.0.1",
+    "body-parser": "^1.2.0"
   },
   "devDependencies": {
     "sinon": "",