Node js Download File From Rest API

Node js + express rest API download file; In this tutorial, you will learn how to download files from server in node js + express+ rest API.

How to Download File From Rest API in Node js Express

Let’s follow the following steps to download files from rest api in node js express app:

• Step 1 – Create Node Express js App
• Step 2 – Install Node Modules
• Step 3 – Create Server.js File
  • Import Installed Modules
  • Create REST API to Download File
• Step 4 – Start Node Express Js App Server
• Step 5 – Test Node js Rest Api File Download

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

Step 2 – Install Node Modules

Execute the following command on terminal to install express dependencies:

npm install express --save

Step 3 – Create Server.js File

Create Server.js file and then follow the below steps:

Import Installed Modules

Open server.js file and import above installed modules, as shown below:

const express = require('express');
const app = express();
const path = require('path');

Create REST API to Download File

Open server.js file and crate download file rest API routes in node js app, as shown below:

//route to download a file
app.get('/download/:file(*)',(req, res) => {
	var file = req.params.file;
	var fileLocation = path.join('./uploads',file);
	console.log(fileLocation);
	res.download(fileLocation, file);
});

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

Step 5 – Test Node js Rest Api File Download

To download files using rest APIs in node js server; So open postman call above created rest api into your postman app:

API URL :- http://localhost:3000/download/your-file-name
Method :- GET

Conclusion

Node js + express rest API download file; Through this tutorial, you have learned how to download files from server in node js + express+ rest API.

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