ResilioTransfer

Inspiration Reliable file transfer over unstable networks is a widespread challenge, especially in rural, remote, or disaster-hit areas where internet connectivity is intermittent. We wanted to create a system that solves common transfer failures and supports real-time feedback and security mechanisms.

What it does ResilioTransfer enables fast, secure, and resilient file transfer by breaking files into chunks, verifying their integrity with checksums ( MD5 MD5, SHA-256 SHA-256), and prioritizing transfers. It provides real-time status updates to users to inform them about transfer progress and issues.

How we built it We used the MERN stack where the backend (Node.js and Express) handled file chunking, integrity checks, and transfer state management, while React was used to build an interactive frontend. WebSocket technology (via Socket.IO) provided real-time communication for transfer progress, and the Crypto module ensured data integrity.

Challenges we ran into The biggest challenges were:

Managing unstable connections gracefully by implementing resumable chunk transfers.

Designing a priority system for multiple concurrent file transfers.

Delivering real-time transfer updates without overloading the network.

We overcame these by chunk-level acknowledgements, retry mechanisms, and efficient WebSocket event handling.

Accomplishments that we're proud of Implementing reliable, resumable file transfers.

Real-time transfer dashboard with prioritized uploads/downloads.

Built a secure, scalable system architecture that can extend to cloud storage.

What we learned We deepened our understanding of:

Networking concepts around file transfer reliability.

WebSocket integration for live user feedback.

Security best practices with cryptographic hash functions to ensure file integrity.

What's next for ResilioTransfer We plan to:

Add end-to-end encryption features.

Integrate cloud storage options (AWS S3, Google Cloud).

Enhance UI/UX for easier file management.

Develop mobile apps for on-the-go transfers.

Built With

• express.js
• javascript
• node.js
• react
• react)-backend:-express.js-for-rest-apis-and-file-management-frontend:-react-for-building-the-responsive-ui-real-time-communication:-socket.io-(websockets)-for-live-transfer-status-updates-data-integrity:-crypto-module-for-hash/checksum-(md5
• sha-256)-storage:-local-file-system-(can-be-extended-to-cloud-storage)-others:-axios-for-http-requests
• socket.io