bugfix: proper error catching in node backend

deploy/app.js

@@ -38,9 +38,6 @@ app.use(session({
  */
 configureAuth(app)
 
-const catchError = require('./catchError')
-app.use(catchError)
-
 const publicPath = process.env.NODE_ENV === 'production'
   ? path.join(__dirname, 'public')
   : path.join(__dirname, '..', 'dist', 'aot')
@@ -61,4 +58,7 @@ app.use('/nehubaConfig', nehubaConfigRouter)
 app.use('/datasets', datasetRouter)
 app.use('/plugins', pluginRouter)
 
+const catchError = require('./catchError')
+app.use(catchError)
+
 module.exports = app
\ No newline at end of file

deploy/catchError.js

@@ -7,5 +7,5 @@ module.exports = ({code = 500, error = 'an error had occured', trace = 'undefine
     error,
     trace
   })
-  res.sendStatus(code)
+  res.status(code).send()
 }
\ No newline at end of file

deploy/datasets/index.js

@@ -18,8 +18,7 @@ datasetsRouter.get('/templateName/:templateName', (req, res, next) => {
   const { user } = req
   getDatasets({ templateName, user })
     .then(ds => {
-      const data = JSON.stringify(ds)
-      res.status(200).send(data)
+      res.status(200).json(ds)
     })
     .catch(error => {
       next({
@@ -35,7 +34,7 @@ datasetsRouter.get('/parcellationName/:parcellationName', (req, res, next) => {
   const { user } = req
   getDatasets({ parcellationName, user })
     .then(ds => {
-      res.status(200).send(JSON.stringify(ds))
+      res.status(200).json(ds)
     })
     .catch(error => {
       next({
@@ -51,7 +50,7 @@ datasetsRouter.get('/preview/:datasetName', (req, res, next) => {
   getPreview({ datasetName })
     .then(preview => {
       if (preview) {
-        res.status(200).send(JSON.stringify(preview))
+        res.status(200).json(preview)
       } else {
         next({
           code: 404,