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GraceSoft
GraceSoft

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Day 9: File Uploads Are More Dangerous Than I Thought

I already had an attachments system.

It worked across all modules.

Reusable. Clean. Flexible.


But I hadn’t thought deeply about one thing:

Privacy.


⚠️ The Risk

Files can contain:

  • Personal data
  • Sensitive documents
  • Things that should never be public

And if handled badly?

They become a liability.


🔐 What I Changed

I redesigned attachments with privacy in mind:


Private by Default

  • Files are private unless explicitly made public

Signed URLs

  • Temporary access links
  • Expire after a set time

Transparency

Each file shows:

  • Who uploaded it
  • Where it’s used

🧠 The Insight

Files are not just assets.

They are data.


And they need the same level of care.


🚀 Bigger Picture

Now my attachments system isn’t just reusable.

It’s:

Safe by design.


Which means every future module benefits automatically.


🧠 Final Thought

At this point, something clicked.


I’m no longer just building features.

I’m building:

defaults that shape behaviour

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