The Formidable Module There is a very good module for working with file uploads, called "Formidable".
The Formidable module can be downloaded and installed using NPM:
C:\Users\Your Name >npm install formidable
After you have downloaded the Formidable module, you can include the module in any application:
var formidable = require('formidable');
Upload Files Now you are ready to make a web page in Node.js that lets the user upload files to your computer:
Step 1: Create an Upload Form Create a Node.js file that writes an HTML form, with an upload field:
Example This code will produce an HTML form:
var http = require('http');
http.createServer(function (req, res) { res.writeHead(200, {'Content-Type': 'text/html'}); res.write('<form action="fileupload" method="post" enctype="multipart/form-data">'); res.write('<input type="file" name="filetoupload"><br>'); res.write('<input type="submit">'); res.write('</form>'); return res.end(); }).listen(8080);
Step 2: Parse the Uploaded File Include the Formidable module to be able to parse the uploaded file once it reaches the server.
When the file is uploaded and parsed, it gets placed on a temporary folder on your computer.
Example The file will be uploaded, and placed on a temporary folder:
var http = require('http');var formidable = require('formidable'); http.createServer(function (req, res) { if (req.url == '/fileupload') { var form = new formidable.IncomingForm(); form.parse(req, function (err, fields, files) { res.write('File uploaded'); res.end(); }); } else { res.writeHead(200, {'Content-Type': 'text/html'}); res.write('<form action="fileupload" method="post" enctype="multipart/form-data">'); res.write('<input type="file" name="filetoupload"><br>'); res.write('<input type="submit">'); res.write('</form>'); return res.end(); } }).listen(8080);
Step 3: Save the File When a file is successfully uploaded to the server, it is placed on a temporary folder.
The path to this directory can be found in the "files" object, passed as the third argument in the parse()
method's callback function.
To move the file to the folder of your choice, use the File System module, and rename the file:
Example Include the fs module, and move the file to the current folder:
var http = require('http'); var formidable = require('formidable'); var fs = require('fs'); http.createServer(function (req, res) { if (req.url == '/fileupload') { var form = new formidable.IncomingForm(); form.parse(req, function (err, fields, files) { var oldpath = files.filetoupload.filepath; var newpath = 'C:/Users/Your Name /' + files.filetoupload.originalFilename; fs.rename(oldpath, newpath, function (err) { if (err) throw err; res.write('File uploaded and moved!'); res.end(); }); }); } else { res.writeHead(200, {'Content-Type': 'text/html'}); res.write('<form action="fileupload" method="post" enctype="multipart/form-data">'); res.write('<input type="file" name="filetoupload"><br>'); res.write('<input type="submit">'); res.write('</form>'); return res.end(); } }).listen(8080);
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FAQs
Node.js Upload Files
Step 1: Create an Upload Form. Create a Node.js file that writes an HTML form, with an upload field: ... Step 2: Parse the Uploaded File. Include the Formidable module to be able to parse the uploaded file once it reaches the server. ... Step 3: Save the File.
How to load a file in NodeJs? ›
Step-by-step Node. js file upload example
Ensure Node. ... Create a file named upload. ... Add FileSystem (fs) and Formidable library dependencies. Use Node. ... Create an HTML upload form in a file named index. ... Run the JavaScript file and use the HTML form to upload files.
How do I upload multiple files to NodeJs? ›
Upload multiple files in Node. js (video tutorial)
Upload one image using the Node.js SDK. Run the code and get a response. Upload multiple images. Run the code and get a response. Install p-limit. Set the concurrent promise limit. Batch upload using p-limit. Run the batch upload.
What is the best file upload library for NodeJs? ›
In Node. js, one of the best libraries for handling file uploads is Multer . Multer is a middleware for handling multipart/form-data , which is primarily used for uploading files. It allows developers to easily handle file uploads by providing a simple API and powerful features.
How to add data to file in NodeJS? ›
To append data to file in Node. js, use Node FS appendFile() function for asynchronous file operation or Node FS appendFileSync() function for synchronous file operation .
How to include files in NodeJS? ›
To include the File System module, use the require() method : var fs = require('fs'); Common use for the File System module: Read files.
How to upload a file in JavaScript? ›
First, create an index.html with simple input element with a file type attribute:
<input type="file"> <form method="post" enctype="multipart/form-data"> <input name="file" type="file" multiple> <button type="submit">Upload</button> </form>
How does Node.js handle a file request? ›
Here is how Node.js handles a file request:
Sends the task to the computer's file system. Ready to handle the next request. When the file system has opened and read the file, the server returns the content to the client.
How to upload Node.js to server? ›
Deploy & Run your Node. js application
GIT clone the code in a build folder. Install dependencies via npm ci. Configure Supervisord to start and manage the Node.js process. Reread and update the Supervisord program configuration. Symlink the build for to the current release folder. Restart the Node.js process via Supervisord.
How to upload large files in node js? ›
Big file upload
Get the file context in the frontend, find out the size of the file. Make chunks of the bytes based on a pre-defined chunkSize. Upload chunks to the server sequentially.
You can use the require() method to import an external JavaScript file into another JavaScript file with Node. js. This method is used to include modules that exist in separate files. It takes the path of the module as its argument and returns an object representing the imported module.
How to import multiple files in js? ›
Uploading Multiple Files Using JavaScript
Step 1: Create an HTML form with a file input element that allows Multiple file selections. ... Step 2: Add an event listener to capture file selection. ... Step 3: Use FormData to Store Files. ... Step 4: Send the AJAX request using XMLHttpRequest.
How to import libraries in node? ›
How to import and export modules in NodeJS?
In Node.js, you can import and export modules using the CommonJS module system. ... Exporting Modules. ... Using. Or, you can export directly: Using shorthand. To import modules, use the function: Here's a complete example illustrating the syntax for both exporting and importing modules:
How to import another js file in node? ›
To import an external JavaScript file into another JavaScript file with Node.js, you can use the require function. In this example, require is used to import the "myFile.js" file into the current file. Make sure to include the correct file path in the require statement.
How do I upload a file to the API? ›
How to Upload Files in Requests Using API?
Step 1: Creating a New Project. Open the Apidog application and create a new Request. Step 2: Select the Request Method. ... Step 3: Set the Request Body Content Type. ... Step 4: Add a File Field to the Request Body. ... Step 5: Save and Test the Request.
How to run a file in Node.js command? ›
You need to create a JavaScript file with . js extension, navigate to the file directory in the terminal and execute the file with “node filename. js ” command. Additionally, you can pass command-line arguments to your script and use them in your JavaScript code.
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