What is the right way to use MemoryStorage option?

Hi.

I get an error with this code(Cannot read property 'buffer'). What is the right way to use memoryStorage option?

//  import and use the modules
var app   = require('express')();
var http = require('http').Server(app);
var bodyParser = require("body-parser");
var multer  = require('multer');
var storage = multer.memoryStorage();
var upload = multer({ storage: storage });
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

app.post('/imagenes', upload.single(''), function(req,res){

        req.file.buffer;     // TypeError: Cannot read property 'buffer' of undefined

});

http.listen(8080,function(){
    console.log("Listening: 8080");
});

Thanks.

[geetayu]

Hi @LinusU var express = require(“express”) var multer = require(‘multer’) var app = express() var path = require(‘path’) var fs = require(‘fs’)

var ejs = require(‘ejs’) app.set(‘view engine’, ‘ejs’)

var MAGIC_NUMBERS = { jpg: ‘ffd8ffe0’, jpg1: ‘ffd8ffe1’, png: ‘89504e47’, gif: ‘47494638’ }

function checkMagicNumbers(magic) { if (magic == MAGIC_NUMBERS.jpg || magic == MAGIC_NUMBERS.jpg1 || magic == MAGIC_NUMBERS.png || magic == MAGIC_NUMBERS.gif) return true }

app.get(‘/api/file’, function(req, res) { res.render(‘index’) })

app.post(‘/api/file’, function(req, res) { var upload = multer({ storage: multer.memoryStorage() }).single(‘userFile’) upload(req, res, function(err) { var buffer = req.file.buffer var magic = buffer.toString(‘hex’, 0, 4) var filename = req.file.fieldname + ‘-’ + Date.now() + path.extname(req.file.originalname) if (checkMagicNumbers(magic)) { fs.writeFile(‘./uploads/’ + filename, buffer, ‘binary’, function(err) { if (err) throw err res.end(‘File is uploaded’) }) } else { res.end(‘File is no valid’) } }) })

var port = process.env.PORT || 8080 app.listen(port, function() { console.log('Node.js listening on port ’ + port) })

Can you please help me on this i am getting below error “TypeError: multer.memoryStorage is not a function”

[LinusU]

I think that this line is your problem:

app.post('/imagenes', upload.single(''), function(req,res){
//                                  ^ here

It shouldn’t be an empty string, but rather the name of the field that is going to be uploaded.

What does your form look like?