File Uploads: Storage, Validation and Security
Letting users upload files — documents, photos, spreadsheets — is useful but surprisingly risky if handled carelessly. A bad upload can fill your storage, break a page or even smuggle in malicious code.
We treat every upload as untrusted until proven safe, which keeps your system and your customers protected.
Checks We Run on Every File
- Confirm the file type really matches what it claims to be.
- Enforce a sensible size limit.
- Scan for malware where appropriate.
- Rename and store it away from executable areas.
Where Files Live
For anything beyond the smallest site we store uploads in dedicated object storage rather than on the web server itself. That scales smoothly, keeps backups simple and serves files quickly worldwide.
Frequently Asked Questions
Can users overwrite each other's files?
No. Each upload is given a unique name and tied to its owner, so collisions and tampering are prevented.
What stops someone uploading a virus?
Type and size checks, optional malware scanning, and storing files where they cannot be executed all work together.
If you need a hand with any of this, your Progressive Robot delivery team is ready to help. Raise a ticket from the Support area of your client portal or speak to your account manager and we will guide you through the next steps.