In this chapter we will learn node js file upload, node js multer file upload with example, node js multiple file upload, node js express upload image example, node js rest api file upload, multer multiple file upload. We will use express-generator tool for creating a application. And we will use view engine hbs.
First of all, we will install express-generator tools globaly. If you have already installed express-generator tool then no need to install.
npm install express-generator -g
Create a application using express-generator tool and set view engine hbs
express --view=hbs myapp
cd myapp
npm install
Multer is a node.js middleware for handling multipart/form-data, which is used for uploading files.
npm install --save multer
Create a blogs.js in routes folder for upload files.
Edit app.js file and import var blogsRouter = require('./routes/blogs')
; and set blogs route app.use('/blogs', blogsRouter)
;
.....
var blogsRouter = require('./routes/blogs');
.....
.....
app.use('/blogs', blogsRouter);
The disk storage engine gives you full control on storing files to disk.
var storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, 'uploads/')
},
filename: function (req, file, cb) {
cb(null, Date.now() + file.originalname)
}
})
var upload = multer({ storage: storage })
Import multer into routes/blogs.js
for file upload.
routes/blogs.js
var express = require('express');
var router = express.Router();
var multer = require('multer');
var storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, 'uploads/')
},
filename: function (req, file, cb) {
cb(null, Date.now() + file.originalname)
}
})
var upload = multer({ storage: storage })
/* GET create blog. */
router.get('/create', function(req, res, next) {
res.render('create', {title: 'Create Blog'});
});
/*single file upload*/
router.post('/upload', upload.single('blogimage'), function(req, res, next) {
var fileinfo = req.file;
var title = req.body.title;
console.log(title);
res.send(fileinfo);
})
module.exports = router;
Create a view file create.hbs
in viewsfolder.
views/create.hbs
<div class="container">
<h1>{{title}}</h1>
<hr />
<div class="row">
<div class="col-md-6">
<form action="/blogs/upload" method="post" enctype="multipart/form-data">
<div class="form-group">
<input type="text" name="title" class="form-control" placeholder="Title">
</div>
<div class="form-group">
<input type="file" name="blogimage"/>
</div>
<button type="submit" class="btn btn-info">upload</button>
</form>
</div>
</div>
</div>
/*multiple files upload*/
router.post('/uploads', upload.array('blogimage', 5), function(req, res, next) {
var fileinfo = req.files;
var title = req.body.title;
console.log(title);
res.send(fileinfo);
})
In multiple files upload, accept an array of files, all with the name fieldname and number of files. In this code upload.array(‘blogimage’, 5) blogimage is fieldname< and 5 is number of files
Add multiple in html form
<input type="file" name="blogimage" multiple/>
rotues/blogs.js
var express = require('express');
var router = express.Router();
var multer = require('multer');
var storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, 'uploads/')
},
filename: function (req, file, cb) {
cb(null, Date.now() + file.originalname)
}
})
var upload = multer({ storage: storage })
/* GET create blog. */
router.get('/create', function(req, res, next) {
res.render('create', {title: 'Create Blog'});
});
/*single file upload*/
router.post('/upload', upload.single('blogimage'), function(req, res, next) {
var fileinfo = req.file;
var title = req.body.title;
console.log(title);
res.send(fileinfo);
})
/*multiple files upload*/
router.post('/uploads', upload.array('blogimage', 5), function(req, res, next) {
var fileinfo = req.files;
var title = req.body.title;
console.log(title);
res.send(fileinfo);
})
module.exports = router;
npm start
Then load http://localhost:3000/ in your browser to access the app.
File upload url http://localhost:3000/blogs/create
In this lesson we have learned installation of express-generator tool and create application using express-generator tool. Upload single and multiple file using multer in Node.js.
#node-js #javascript