Question

How do I send a file from postman to node.js with multer?

I’m trying to let users upload files in my Node.js app, and I’m using Multer for handling these uploads. But I’m stuck when it comes to testing this with Postman. I’m not sure how to set up Multer on the server side or how to correctly send the file from Postman using the form-data option. Also, once the file is uploaded, I don’t know how to access or process it in Node.js. If someone could show me a simple example of how to do this, it would really help.

Answer 1

npm install multer express

Then  we will set up express and mutler 
like creating a basic express app and configure Multer for file uploads

const express = require('express');
const multer = require('multer');
const path = require('path');



const app = express();



// Configure Multer storage
const storage = multer.diskStorage({
destination: (req, file, cb) => {
cb(null, 'uploads/'); // Specify the folder for uploads
},
filename: (req, file, cb) => {
cb(null, Date.now() + path.extname(file.originalname)); // Append file extension and timestamp to file
}
});



// Initialize Multer
const upload = multer({ storage: storage });



// Define a route for file upload
app.post('/upload', upload.single('file'), (req, res) => {
try {
res.send({
message: 'File uploaded successfully',
file: req.file
});
} catch (error) {
res.status(400).send('File upload failed');
}
});


app.listen(3000, () => {
console.log('Server running on port 3000');
});

then we will create the upload folder : - mkdir uploads

So , next 

1. Open Postman.
2. Select POST request and enter http://localhost:3000/upload.
3. In the Body tab, select form-data.
4. Add a key named file and select File from the dropdown.
5. Choose a file from your system to upload.
6. Send.