Image Upload using nodejs

Question

I am using Ionic v3 and and for backend used Nodejs.

var storage = multer.diskStorage({ destination: function(req, file, callback) { callback(null, './uploads') }, filename: function(req, file, callback) { console.log(file) callback(null, file.fieldname + '-' + Date.now() + path.extname(file.originalname)) } });

var upload = multer({storage: storage});

To call this method we require req ,res through API call like below,

upload(req, res, function(err) { res.end('File is uploaded') });

My question that is it possible to call this upload function without API call(req,res) ? If yes how can we do ?

What i want to do is, I am developing chat application using ionic2 and nodejs where i can share image. That image should be upload to server side. How can I do for socket programming ?

Possible duplicate of Can I upload a file to server by socket.io in node.js? — yeya
– yeya, Commented Feb 15, 2018 at 9:28
Yes, it is possible, you can send almost anything by socket. Check this: stackoverflow.com/q/5973825 — yeya
– yeya, Commented Feb 15, 2018 at 9:29
@KiranDevkar you need to submit form or send a http request to nodeJS server and get files object in request. You may also have to use multiparty npm plugin to parse multipart/form-data. — Parth Mahida
– Parth Mahida, Commented Feb 15, 2018 at 10:20

user9685203 · Accepted Answer · 2018-04-28 05:02:10Z

If you want to upload image using base64 then you can use following code

socket.on('Upload_Image_base64', function(data) { var fs = require('fs'); var img = data.image64; var imgname = new Date().getTime().toString(); imgname = data.userid + imgname + '.png'; var data = img.replace(/^data:image\/\w+;base64,/, ""); var buf = new Buffer(data, 'base64'); fs.writeFile(__dirname + "/uploads/" +imgname, buf); });

// here data.image64 and data.userid --> is the parameter which we pass during socket event request. For multi part - this may help you.

socket.on('Upload_Image', function(data) { var app = require('express')(); var multer = require('multer') var storage = multer.diskStorage({ destination: function (req, file, cb) { cb(null, 'uploads/') }, filename: function (req, file, cb) { cb(null, file.fieldname + '-' + Date.now()) } }) var upload = multer({ storage: storage }).single(data.file); console.log(data.file); app.post('/', function (req, res) { upload(req,res,function(req,res) { if(err) { console.log("error uploading file"); } else { console.log("uploaded"); } }); }); });

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