Cloud storage workflow

Secure File Center

A secure file-management module for large uploads, validation, malware inspection, object storage, and controlled downloads.

RoleBackend and upload workflow developer

Product typeCloud storage workflow

FocusPHP · Security · AWS

01 · The problem

Business and technical context

Standard browser uploads were unreliable for large files, while direct public storage links created security and access-control concerns. The system also needed a practical inspection workflow before files became available.

02 · The solution

Implementation approach

I designed a staged upload flow with chunk tracking, server-side validation, malware checks, storage metadata, and short-lived signed download links. Processing states were exposed clearly to the interface so users could distinguish uploading, scanning, ready, and rejected files.

03 · Key functionality

What I delivered

Resumable chunked uploads with progress and cancellation.

File type, size, ownership, and integrity validation.

ClamAV and external scanning integration points.

Private object storage with presigned access URLs.

Status-driven UI and secure download authorization.

04 · Constraints

Important challenges

Maintaining upload state across failed or repeated chunks.

Preventing unscanned files from being exposed prematurely.

Separating storage access from application permissions.

05 · System view

High-level architecture

1 Chunk uploader

2 PHP validation API

3 Scan queue / scanners

4 Private object storage

06 · Interactive system motion

Explore how the layers influence one another.

This abstract simulation turns the architecture above into a small spring-and-collision system. Move or press inside the canvas to disturb it. It is a systems visualization, not customer footage or a product screenshot.