Node js express file upload rest API example; This tutorial will show you how to upload files in node js + express + rest APIs using multer package.
Throughout this tutorial steps, you will learn how to create file upload REST API with Node js and Express js. You will also find out how to use multer in Node.js for handling multipart/form-data for uploading files.
Node JS + Express + Rest API + File Upload + Multer
Follow the below steps to file upload with multer in node.js + express + rest API;
- Step 1 – Create Node Express js App
- Step 2 – Install express and Multer dependencies
- Step 3 – Create Server.js File
- Step 4 – Start Node Express Js App Server
- Step 5 – Upload File using Node js Rest Api
Step 1 – Create Node Express js App
Execute the following command on terminal to create node js app:
mkdir my-app cd my-app npm init -y
Step 2 – Install express and Multer dependencies
Execute the following command on terminal to install express and busboy dependencies:
npm install express multer body-parser --save npm install sharp --save
Step 3 – Create Server.js File
Create server.js file and import express, multer, path dependencies in server.js; as shown below:
var express = require("express");
var multer = require('multer');
var bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
var storage = multer.diskStorage({
destination: function (req, file, callback) {
callback(null, './uploads');
},
filename: function (req, file, callback) {
callback(null, file.fieldname + '-' + Date.now());
}
});
var upload = multer({ storage : storage}).single('userPhoto');
app.post('upload-avatar',function(req,res){
upload(req,res,function(err) {
if(err) {
return res.end("Error uploading file.");
}
res.end("File is uploaded");
});
});
app.listen(3000,function(){
console.log("Working on port 3000");
});
Step 4 – Start Node Express Js App Server
Execute the following command on terminal to start node express js server:
//run the below command npm start after run this command open your browser and hit http://127.0.0.1:3000/upload-avatar
Step 5 – Upload File using Node js Rest Apis
To upload files using rest apis; So open postman for sending HTTP multipart/form-data requests: as shown below picture:
Conclusion
Node js express rest API file upload example tutorial; you have learned how to build REST API for file uploading using rest API in Node.js, Express.js and Multer.
