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How can you combine input sanitization with validation in Flask to ensure safe and correct user data?

hard📝 Conceptual Q9 of 15
Flask - Security Best Practices
How can you combine input sanitization with validation in Flask to ensure safe and correct user data?
AFirst validate input format, then sanitize with escape() before use
BSanitize input first, then validate format
COnly sanitize input, validation is unnecessary
DSkip sanitization if validation passes
Step-by-Step Solution
Solution:

  1. Step 1: Understand validation and sanitization order

    Validate input format first to reject bad data early.

  2. Step 2: Sanitize after validation

    Sanitize to prevent code injection before using input.

  3. Final Answer:

    First validate input format, then sanitize with escape() before use -> Option A

  4. Quick Check:

    Validate then sanitize = safe and correct input [OK]
Quick Trick: Validate format first, then sanitize input [OK]
Common Mistakes:
MISTAKES
  • Sanitizing before validation
  • Skipping validation
  • Skipping sanitization if validation passes

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