Lesson 7 of 8
Add Files or Images
Files and images should enter your app through explicit validation, size limits and clear user feedback.
Active reading
Understand the idea
Validate type and size before upload, keep secrets server-side and pass only the content the model needs. For large files, process or chunk them rather than blindly sending everything.
Example
Accept PDF under 10 MB → extract text on server → send selected sections to the model.
Practice
Apply this lesson to one real task you already have, then write down how you would verify the result.
Common mistake
Trusting the filename extension as proof of file type.
Key takeaway
Treat uploaded content as untrusted input and minimize what reaches the model.