Node Express JS Busboy File Image Upload

To upload image file in node express js using busboy; Simply install busboy module in node express js app and use busboy.on('file', (fieldname, file, filename, encoding, mimetype) => {const saveTo = path.join(__dirname, 'uploads', filename.filename); file.pipe(fs.createWriteStream(saveTo)); }); with your application route to upload files in your application.

Busboy is an event-based streaming parser that’s not tied to node Express.js. Instead of storing intermediate files, it provides a stream to the incoming file. It’s been around since 2013. The core multipart/form-data implementation has been extracted to a separate dicer module.

Node.js Upload file using Express js and BusBoy

Steps to upload image file in node express js using busboy library:

Step 1 – Create Node Express js App

Simply open your cmd or terminal window and run the following commands into it to create node expres js application:

mkdir my-app
cd my-app
npm init -y
mkdir uploads

Step 2 – Install express and Busboy Module

To install express and busboy module; Simply run npm install express and npm install busboy command on cmd or terminal window:

npm install express

npm install busboy

Step 3 – Create File Upload Form

To create a form with a `file input` element that allows us to choose the file and a button to submit the form; like following:

app.get('/', function (req, res) {
    res.writeHead(200, {'Content-Type': 'text/html'});
    res.write('<form action="fileupload" method="post" enctype="multipart/form-data">');
    res.write('<input type="file" name="filetoupload"><br>');
    res.write('<input type="submit">');
    res.write('</form>');
    return res.end();
})

Make sure your form must have enctype="multipart/form-data"attribute with form method.

Step 4 – Create File Upload Route

To create route to upload image file in your node express js application; Like following:

app.post('/fileupload', function (req, res) {
    var busboy = new Busboy({ headers: req.headers });
    busboy.on('file', function(fieldname, file, filename, encoding, mimetype) {
 
      var saveTo = path.join(__dirname, 'uploads/' + filename);
      file.pipe(fs.createWriteStream(saveTo));
    });
 
    busboy.on('finish', function() {
      res.writeHead(200, { 'Connection': 'close' });
      res.end("That's all folks!");
    });
 
    return req.pipe(busboy);    
});

Step 5 – Import Module and Route in Server.js

To create server.js file, and import express, busboy, path and routes into it to upload images files: Like following:

var http = require('http'),
express = require('express'),
Busboy = require('busboy'),
path = require('path'),
fs = require('fs');
 
var app = express();
 
app.get('/', function (req, res) {
    res.writeHead(200, {'Content-Type': 'text/html'});
    res.write('<form action="fileupload" method="post" enctype="multipart/form-data">');
    res.write('<input type="file" name="filetoupload"><br>');
    res.write('<input type="submit">');
    res.write('</form>');
    return res.end();
})
 
app.post('/fileupload', function (req, res) {
    var busboy = Busboy({ headers: req.headers });
    busboy.on('file', function(fieldname, file, filename, encoding, mimetype) {

      var saveTo = path.join(__dirname, 'uploads/' + filename.filename);
      file.pipe(fs.createWriteStream(saveTo));
    });
 
    busboy.on('finish', function() {
      res.writeHead(200, { 'Connection': 'close' });
      res.end("That's all folks!");
    });
 
    return req.pipe(busboy);    
});
 
// port must be set to 3000 because incoming http requests are routed from port 80 to port 8080
app.listen(3000, function () {
    console.log('Node app is running on port 3000');
});

Step 6 – Start Node Express Js App Server

To run the npm start to run the development server:

//run the below command

npm start

after run this command open your browser and hit 

http://127.0.0.1:3000/

Node js Express Upload File Image using Busboy will look like:

Conclusion

In this tutorial, you have learned how to upload files and images in node js express framework.

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