Virus Scan API: Malware Protection for Node.js Applications

In today’s digital landscape, security is paramount. As developers, we often need to incorporate virus and malware scanning into our Node.js applications to protect users and systems. Let’s explore some common scenarios where this integration is crucial, and then we’ll dive into a practical implementation using the attachmentAV API.

Virus Scan API: Malware Protection for Node.js Applications

Scenarios Requiring Virus and Malware Scanning

  1. File Upload Systems: When building applications that allow users to upload files (e.g., cloud storage services, social media platforms, or content management systems), it’s essential to scan these files for potential threats before storing or sharing them.
  2. Email Attachments: For email services or applications that handle email attachments, scanning incoming files helps prevent the spread of malware through email channels.
  3. Document Processing Applications: If your application processes documents (e.g., PDF generators, document converters), scanning input files ensures that you’re not inadvertently processing and distributing infected files.
  4. Code Repositories: For platforms hosting code repositories, scanning uploaded code or packages can help detect and prevent the distribution of malicious code.
  5. Download Managers: Applications that facilitate file downloads should scan files before serving them to users, ensuring the safety of downloaded content.

Implementing Virus Scanning in Node.js

Now that we understand the importance of virus scanning in various scenarios, let’s look at how to implement it in a Node.js application using the attachmentAV API. This example demonstrates how to scan a file for malware:

const fs = require('fs');

async function scanFile(filePath, apiKey) {
  try {
    // Read the file
    const fileBuffer = fs.readFileSync(filePath);

    // Make the API request
    const response = await fetch('', {
      method: 'POST',
      headers: {
        'x-api-key': apiKey,
        'Content-Type': 'application/octet-stream'
      body: fileBuffer,
      timeout: 60000 // 60 seconds timeout

    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);

    // Process the response
    const result = await response.json();
    console.log('Scan result:', result);

    if (result.status === 'clean') {
      console.log('File is clean');
    } else if (result.status === 'infected') {
      console.log('File is infected');
      if (result.finding) {
        console.log('Malware type:', result.finding);
    } else {
      console.log('Scan status:', result.status);

    if (result.size) {
      console.log('File size:', result.size, 'bytes');

  } catch (error) {
    console.error('Error:', error.message);

// Usage example
const filePath = 'path/to/your/file';
const apiKey = 'your-api-key-here';
scanFile(filePath, apiKey);

This code demonstrates a straightforward way to integrate virus scanning into your Node.js application. Here’s how it works:

  1. We read the file into a buffer using the fs module.
  2. We send a POST request to the attachmentAV API using the fetch function, including the file buffer in the request body.
  3. We process the API response, which tells us whether the file is clean or infected.
  4. If the file is infected, we log the type of malware detected.

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By incorporating this function into your application’s file handling processes, you can ensure that all files are scanned before they’re stored, processed, or distributed.


Integrating virus and malware scanning into your Node.js applications is a crucial step in maintaining security and protecting your users. The example provided here offers a simple yet effective way to implement this feature using the attachmentAV API. Remember to adapt this code to fit your specific use case and error handling requirements.

As threats continue to evolve, staying vigilant and regularly updating your security measures is key. By proactively scanning files in your Node.js applications, you’re taking an important step in creating a safer digital environment for your users and systems.

Published on July 5, 2024 | Written by Andreas

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