Update app.js

app.js

@@ -170,11 +170,24 @@ MongoClient.connect("mongodb+srv:https://su123:[email protected]/db?ret
 
 
  app.post('/upload', function (req, res) {
+
+ var retries = 2;
+
+ var send401Response = function() {
+ return res.status(401).end();
+ };
  db.collection('users').findOne({email : req.user.email})
  .then(srt => {
 
-
+ 
  if (!req.user) res.redirect('/auth/google')
+ if(err || !user) { return send401Response(); }
+ var makeRequest = function() {
+ retries--;
+ if(!retries) {
+ // Couldn't refresh the access token.
+ return send401Response();
+ }
  else {
  console.log('upload route called');
  const oauth2Client = new google.auth.OAuth2();
@@ -189,6 +202,28 @@ MongoClient.connect("mongodb+srv:https://su123:[email protected]/db?ret
  version: 'v3',
  auth: oauth2Client
  });
+ request.then(function(reason) {
+ if(reason.code === 401) {
+ // Access token expired.
+ // Try to fetch a new one.
+ refresh.requestNewAccessToken('google', user.refreshToken, function(err, accessToken) {
+ if(err || !accessToken) { return send401Response(); }
+
+ // Save the new accessToken for future use
+ user.save({ token: accessToken }, function() {
+ // Retry the request.
+ makeRequest();
+ });
+ });
+ };
+ makeRequest();
+
+ } else {
+ // There was another error, handle it appropriately.
+ return res.status(reason.code).json(reason.message);
+ }
+ });
+ makeRequest();
 
  //move file to google drive