antivirus-microservice

Antivirus Microservice

This is a free antivirus microservice for file scanning using ClamAV. The service is written in TypeScript and uses Bun as the runtime environment.

DEMO

Demo with default maximum file upload size 512Kb is here

Features

• Free solution for antivirus file scanning
• There are clients available for Node.js, PHP, and Python.
• Uses the reliable and widely adopted ClamAV antivirus engine
• Easy deployment with Docker
• Simple RESTful API for file upload and scanning
• Automatic waiting for ClamAV to start up

Table of Contents

• Antivirus Microservice
• DEMO
• Features
• Table of Contents
• Antivirus Microservice Server
  • Requirements
  • Installation and Running
  • Usage
    • Scanning a File
    • Checking a File with a Virus
  • Notes
• Antivirus Microservice Client
  • Installation
  • Usage
  • API
  • Notes
• Nginx configuration
• License
• Contributing
• Support
• Created by

Antivirus Microservice Server

Requirements

• Docker
• Docker Compose

Installation and Running

• Clone the repository:

  git clone https://github.com/ivanoff/antivirus-microservice.git
  cd antivirus-microservice
  

• Build the Docker image:

  sudo docker compose build
  

• Start the service:

  sudo docker compose up
  

After successful startup, you will see the message:

[2024-08-10T11:27:05.038Z] Service started on 3000 port

Usage

The service provides a single endpoint for uploading and scanning files.

Scanning a File

Send a POST request to http://localhost:3000 with the file in a multipart/form-data form.

Example of checking a file without a virus:

curl -X POST http://localhost:3000 -F "file=@Dockerfile"

Response:

{"ok":true}

Checking a File with a Virus

To demonstrate working with an infected file, first create a test virus:

base64 -d virus.txt.base64 > virus.txt

Then send the file for scanning:

curl -X POST http://localhost:3000 -F "file=@virus.txt"

Response:

{"ok":false,"viruses":["Eicar-Signature"]}

Notes

• The service automatically deletes scanned files after scanning.
• In case of an error during file upload or scanning, the service will return an appropriate error message.

Antivirus Microservice Client

This client provides a simple interface to interact with the Antivirus Microservice. It allows you to easily scan files for viruses using the ClamAV engine.

See Antivirus Microservice Server section to set up the server.

Installation

To install the Antivirus Microservice client, use npm:

npm i -S antivirus-microservice

Usage

Here's a basic example of how to use the Antivirus Microservice client:

import Antivirus from 'antivirus-microservice';

// Initialize the client with the server URL
const antivirus = new Antivirus('http://localhost:3000');

// For example: Create a test file (this is the EICAR test virus file)
const file = new File(['X5O!P%@AP[4\\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*'], 'test.txt', { type: 'text/plain' });

// Check the file
const { ok, viruses } = await antivirus.checkFile(file);

// Log the result
console.log(ok? 'File is clean' : `File is infected: ${viruses}`);
// Result> File is infected: Win.Test.EICAR_HDB-1

In this example, we're creating a file with the EICAR test virus signature. This is a standard test file used to verify that antivirus software is working correctly. When scanned, it should be detected as a virus.

API

The Antivirus class provides the following method:

• checkFile(file: File | Blob): Promise<{ ok: boolean, viruses?: string[], error?: string }>

  Scans the provided file for viruses. Returns a promise that resolves to an object with:

  • ok: boolean indicating whether the file is clean (true) or infected (false)
  • viruses: an array of detected virus names (only present if ok is false)
  • error: a string with error (only present if ok is false)

Notes

• Make sure the Antivirus Microservice server is running and accessible at the URL you provide when initializing the Antivirus client.
• The client works with both File and Blob objects, making it flexible for various use cases.
• Error handling is built into the client. If there's an error communicating with the server, the checkFile method will return { ok: false, viruses: ['Error checking file'] }.

For more information on setting up and using the server, refer to the Antivirus Microservice Server documentation above.

Nginx configuration

Here is the Nginx configuration with a 200MB file size limit set as an example:

server {
    listen       80;
    server_name  antivirus.your-domain.com;

    root /path/to/antivirus-microservice/www;
    index index.html;

    error_log /var/log/nginx/antivirus.your-domain.com.error.log;
    access_log /var/log/nginx/antivirus.your-domain.com.access.log;

    location / {
    }

    location /check {
        rewrite ^/check /$1 break;
        resolver 127.0.0.1;
        proxy_pass http://antivirus-server:3000;
        proxy_set_header X-Real-IP       $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host            $host;
        proxy_connect_timeout 120;
        proxy_send_timeout    120;
        proxy_read_timeout    180;
        client_max_body_size  100M;
    }
}

License

This project is distributed under the MIT license. See the LICENSE file for more information.

Please note that ClamAV is licensed under the Apache 2.0 license. More details can be found here

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Support

If you encounter any problems or have questions, please open an issue in the project repository.

Created by

Dimitry Ivanov [e-mail] # curl -A cv ivanoff.org.ua