I'm using nodejs as backend and vuejs as front. I've uploaded somes files as test using postman to my backend, but, how could I display these uploaded files using multer?
const multer = require('multer');
const storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, 'public/')
},
filename: function (req, file, cb) {
cb(null, file.fieldname + '-' + Date.now())
}
})
const upload = multer({ storage: storage }).single('logo');
router.post('/logo', auth.authorize, (req, res, next) => {
upload(req, res, (err) => {
});
res.status(200).send('uploaded');
});
I got an image named 'logo-1531296527722' in my api public folder. If I try to use it in my img src (http://localhost:3000/api/company/public/logo-1531296527722) it doesn't displayed. If I try to access this route I got this error Cannot GET /api/company/public/logo-1531296527722. In all questions about that, nodejs has its own html processor like ejs or jade, but I my case, nodejs is just serving my front and all images must be rendered using vuejs.
I dit it!
In my app.js I include app.use('/dist', express.static(path.join(__dirname + '/dist')));
Related
I'm using multer as express middleware to upload a file like so:
const upload = multer().single('fieldName');
router.post(
'/',
upload,
(req, res) => {
console.log(req.file)
}
);
It works fine except when I sent the form without a file. Then apparently the upload middleware is just skipped and req.file is undefined.
I tried to add a filter like so but apparently the filter function is not called when there is no file:
function fileFilter(req, file, cb) {
console.log('filtering'); //never reached when file is missing
if (!file) {
return cb(new Error('no file', false));
}
cb(null, true);
}
const upload = multer({fileFilter: fileFilter}).single('fieldName');
router.post(...)
Is there any way to handle the missing file inside the multer middleware? Or do I have to check afterwards?
check in you html form "fieldName" in input name
and this can you help
in you routes app
var storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, 'uploads')
},
filename: function (req, file, cb) {
cb(null, file.fieldname + '-' + Date.now()+'.mp3')
}
})
var upload = multer({ storage: storage })
router.post(
'/uploadfile',upload.single('fieldName'),
)
Iam using busboy body parser to parse the multipart form data. So Iam getting the fields like name, username key values in req.body and files in req.files. But Iam unable to upload files to the directory using multer.
app.use(busboyBodyParser());
app.post('/createUser', (req, res) => {
console.log(req.body);
console.log(req.files);
const storage = multer.diskStorage({
destination: './public/uploads/',
filename: function (req, file, cb) {
cb(null, file.fieldname + '-' + Date.now() +
path.extname(file.originalname));
}
});
const upload = multer({
storage: storage
}).single(req.files['uploadpic']);
upload(req, res, (err) => {
});
});
You don't need to use busboy with multer as it is built on top of it.
Your files are not being saved because your files come in an array form but you're trying to read it in as a single file also with a wrong syntax.
upload.single('fieldName') //is the syntax for single file
Your code will be rewritten like this:
//removing busbodyparser
//declaring multer configs
const storage = multer.diskStorage({
destination: './public/uploads/',
filename: function (req, file, cb) {
cb(null, file.fieldname + '-' + Date.now() +
path.extname(file.originalname));
}
});
const upload = multer({
storage: storage
}).array('uploadpic', 8]
//make sure you define maxCount - here 8 is given as an example
//array will take in a number of files with the same 'uploadpic' field name
app.post('/createUser', (req, res) => {
upload(req, res, function(err) {
if (err) {
//show error
}
//your files are saved and req.body and req.files are populated using multer
console.log(req.files);
console.log(req.body);
});
});
I deployed my express app on heroku and am attempting to upload images using multer. This all works perfectly on localhost but on heroku when I upload an image it will not save to my images folder, and I get a 500 server error with:
Error: ENOENT: no such file or directory, open '../images/kauai-mountain.jpg'
I am using create react app on front end.
const storage = multer.diskStorage({
destination: (req, file, cb) => {
cb(error, '../images/');
},
filename: (req, file, cb) => {
cb(null, file.originalname);
}
});
router.post('/', multer({ storage }).single('image'), (req, res) => {
const { description, category } = req.body;
const url = req.protocol + '://' + req.get('host');
const newPost = new Post({
description,
category,
imagePath: url + '/images/' + req.file.filename
});
newPost.save().then(post => res.json(post)).catch(e => res.json(e));
});
server.js
if (process.env.NODE_ENV === 'production') {
app.use('/images', express.static(path.join(__dirname, 'images')));
app.use('/', express.static('client/build'));
app.get('*' , (req, res) => {
res.sendFile(path.resolve(__dirname, 'client', 'build', 'index.html'));
});
}
My front end code is uploading the image and sending it to the route, the error is in the back end.
EDIT
I am reading that the problem may be that heroku cant save images consistently. I don't understand because I am saving them in an images folder on my server which I run on heroku. Could this be the problem?
I am trying to upload image using multer but getting error,uploads is not a function.Here is my code
var multer = require('multer');
var uploads = multer({dest: './images'});
app.post('/uploading', uploads.single('image'), function(req, res) {
console.log(req.file);
var file = __dirname + '/' + req.file.filename;
uploads(req.file.path, file, function(err) {
if (err) {
console.log(err);
res.send(500);
} else {
res.json({
message: 'File uploaded successfully',
filename: req.file.filename
});
}
});
var multer = require('multer');
var uploads = multer({dest: './images'});
app.post('/uploading', uploads.single('image'), function(req, res) {
yourModel.create(req.body,function(err,result){
console.log(result);
});
});
Its quite obvious; uploads is not a function but uplaod is. So use
upload.single('image')
As #Kuldeep said you don't have to the uploads(filePath, file, (err) => {...}) inside the route.
When you are using multer as middleware (the middle function) multer will automatically upload the file and expose the filename, originalName etc to req.file object inside the route
var multer = require('multer');
var uploads = multer({dest: './images'});
app.post('/uploading', uploads.single('image'), function(req, res) {
// here just write the success or error login
});
Reference You can check here: here
EDIT: The above code will upload the file with hex string as filename without any extension.
In order to add rename function you need to use diskStorage. Here is the code taken from this github issue page.
var storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, './images/')
},
filename: function (req, file, cb) {
crypto.pseudoRandomBytes(16, function (err, raw) {
cb(null, raw.toString('hex') + Date.now() + '.' + mime.extension(file.mimetype)); //this is the rename func
});
}
});
var uploads = multer({ storage: storage });
Now you can use the uploads variable as middleware as shown in the above snippet.
I haven't found a great, soup-to-nuts guide on using Multer (the website is just a little lacking for newbies) so here's my stab at it.
After using:
npm install multer --save
to add it to your project.
For me, I wanted to capture files on a specific route, namely:
/customers/:id/upload
So, I went into my customers.js route file and added:
var multer = require('multer');
as well as the code to set up the storage (diskStorage) and filename configuration tweaks:
var storage=multer.diskStorage({
destination: function(req,file,cb){
cb(null,'/uploads/');
},
filename: function(req,file,cb){
cb(null,file.fieldname+'-'+Date.now());
}
});
I could then create the upload middleware object that lets me specify, per route, how I would like Multer to handle file uploads. On the route above, I only want to receive one file with a particular internal filename so my customers.js route file looks like this:
router.post('/:id/targets/upload', upload.single('connections'), function(req,res,next){
console.log("Router:POST: Companies/:_id/upload");
console.log(req.file);
...
});
All of the examples I saw had stuff being added to the app.js file but these seemed a bit awkward and contrived as examples. Every route may have different file handling needs so it just seemed more appropriate, to me, to configure Multer on a per-controller basis. YMMV.
I am a novice at NodeJS and I created a service to upload images to a shared location. However, I need to set the upload folder dynamically based on the user id: for e.g. the folder will be /uploads/{userid}/file.txt
I am not sure how to do it and I have been searching today with no luck.
The NodeJS service looks like:
var express = require('express')
var multer = require('multer')
var Storage = multer.diskStorage({
destination: function (req, file, callback) {
callback(null, "./Uploads");
},
filename: function (req, file, callback) {
callback(null, file.fieldname + "_" + Date.now() + "_" +
file.originalname);
}
});
var upload = multer({ Storage: Storage })
var app = express()
app.post('/upload', upload.array('uploads[]', 12), function (req, res, next)
{
return res.end("Files uploaded sucessfully!.");
})
Thank you for the help.
Try this
app.use(multer({
dest: './uploads/',
"rename" : function (fieldname, filename, req, res) {
return path.join(fieldname, req.params.user_id+".txt");
}
})