route.js

router.post("/upload/", upload.single("userFile"), function (req, res, next) {
  var userMessage = "";
  if (req.file) {
    var fileDir = req.file.path;
    fileside.getFileKb(fileDir, function (err, result) {
      if (err) {
        throw err;
      }
      arr1.push(result);
      console.log(result);
    });

    fileside.getFileBytes(fileDir, function (err, result) {
      if (err) {
        throw err;
      }
      arr1.push(result);
      console.log(result);
    });

    algorithms.forEach(function (value) {
      fileside.fileHash(fileDir, value, function (err, result) {
        if (err) {
          throw err;
        }
        arr1.push(value + ": " + result);
        console.log(value + ": " + result);
      });
    });

    res.render("index", {
      title: "Fileside",
      stats: arr1
    });
    
  } else {
    userMessage = "File was not recieved";
    res.render("upload", {
      message: userMessage
    });
  }
  arr1 = [];
});