General
PromptBeginner5 minmarkdown
### Java/Kotlin (Bean Validation
Spring)
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110,806 skills indexed with the new KISS metadata standard.
Showing 24 of 110,806Categories: Data & Insights, General, Cursor-rules, Data
General
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- Use established validation libraries (Zod
Joi
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General
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- Never trust any input regardless of source
including internal services
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General
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- [ ] File uploads validated for type (magic bytes)
size limits
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Data
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- [ ] Injection attacks (SQL
XSS
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General
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- [ ] Validation is implemented at all layers (client
server
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General
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After completing the validation implementation
verify:
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General
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- Enum values validated against an explicit allowlist
not a blocklist
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General
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- Unit tests cover every validation rule with valid
invalid
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General
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- No system internals
stack traces
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Data
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- Check referential integrity against existing data (unique usernames
valid foreign keys)
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General
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- Implement temporal validation (expired tokens
past dates
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General
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- Implement file upload validation with magic byte verification
not just MIME type or extension
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General
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- Check for malicious patterns: excessively nested JSON
zip bombs
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Data
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- Implement custom validators for domain-specific data types (SKUs
account numbers
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Data
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- Apply context-aware output encoding (HTML entities for web
parameterization for SQL)
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General
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- Sanitize file names to remove path traversal sequences (../
%2e%2e/) and special characters
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General
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- Validate complex structures (JSON
XML
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Data
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- Check data ranges (min/max for numbers)
lengths (min/max for strings)
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General
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- Verify edge cases: empty strings
nulls
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Data
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- Test with known attack payloads (OWASP testing guide
SQL injection cheat sheets)
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Data
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- Never expose stack traces
database errors
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General
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- Validate and sanitize file uploads for type (magic bytes
not just extension)
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General
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- Normalize whitespace
trim leading/trailing spaces
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