Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Multer is not populating req.body and req.file

See original GitHub issue

I am using Multer to parse a multipart form in a keystone environment and and not able to access the req.body and req.file data inside my route controller

routes/index.js

var keystone = require('keystone'),
middleware = require('./middleware');

var bodyParser = require('body-parser');

//multi-part form parser for FTP api
var multer = require('multer');
var storage = multer.memoryStorage();
var upload = multer({storage: storage});

exports = module.exports = function(app) {
    app.use(bodyParser.json({limit: '10mb'}));
    app.use(bodyParser.urlencoded({limit: '10mb', extended: true}));
    app.post('/upload_api', upload.single('formFile'), routes.api.uploadFTP);
};

routes/api/uploadFTP.js

var keystone = require('keystone');
var ftpMod = require('ftp');
var fs = require('fs');

exports = module.exports = function(req, res) {
    console.log("req.body is ");
    console.log(req.body);
    console.log("req.file is ");
    console.log(req.file);
    res.send("console.log() outputted to screen");
}

public/test-upload.html

<html>
    <body>
        <form name="sampleForm" enctype="multipart/form-data" action="/upload_api" method="post">
            <p>Method</p>
            <input type="text" name="method"><br>
            <p>Options</p>
            <input type="text" name="options"><br>
            <p>File</p>
            <input type="file" name="formFile"><br><br>
            <input type="submit" value="Click to Send">
        </form>
    </body>
</html>

The response i receive from nodejs is

>req.body is 
{}
req.file is 
undefined

I am expecting req.body to contain {method: “sometext”} and req.file to be populated

Issue Analytics

State:
Created 6 years ago
Comments:26 (3 by maintainers)

Top GitHub Comments

13reactions

nickanna42commented, Jun 21, 2017

specifically, I noticed req.file is undefined while using upload.single() but req.files is populated.

This is at odds with the expected behavior according to the documentation

6reactions

HarisHashimcommented, Oct 1, 2017

This is what I just discovered for my case.

In server.js I have

app.use(multer({dest:'./public/uploads/'}).any());

while my routes is using uploads.single. This is what caused req.file to be undefined but req.files to be populated.

After correcting the app.use() line in server.js to

app.use(multer({dest:'./public/uploads/'}).single('file'));

It begin to work as expected.

Top Results From Across the Web

req.file is not populated but, req.body is using multer

In the client, send the FormData as the body of the request: const formData = new FormData() // photo is a Blob, filename...

Multer: Easily upload files with Node.js and Express

Running body-parser in Express ... The code in the image above means that the req.body object is empty, which is to be expected....

req.file.path undefined multer - You.com | The AI Search ...

Req.file Is Undefined Multer When working with the Multer library in Node.js, you may encounter the “req.file is undefined” error. This can ...

@neuralegion/multer - npm

Multer. Multer is a node.js middleware for handling multipart/form-data , which is primarily used for uploading files.

Handling any POST data in Express - CodeX Team

Request body data will be placed to req.body . A few examples for decoding popular request data formats: application/x-www-form-urlencoded; application/json ...