refactor: improve security and code quality with Pattern instances
Replace regex string literals with compiled Pattern instances for better
performance and readability.
Security improvements:
- MobileScannerService: Add input validation patterns
- Filename sanitization pattern
- Session ID validation pattern
- File extension validation pattern
- Prevents path traversal and injection attacks
- SvgSanitizer: Enhanced SVG sanitization
Code quality improvements:
- Convert regex string literals to Pattern.compile() across codebase
- Better performance (patterns compiled once vs per-use)
- More explicit intent in code
- Easier to maintain and test
Changed files:
- Controllers: MergeController, ConvertPdfJsonController, StampController,
PipelineDirectoryProcessor, ReactRoutingController, UIDataTessdataController
- Services: PdfJsonConversionService, PdfJsonFallbackFontService,
SharedSignatureService, TotpService, SignatureService
- Core: SPDFApplication
- Tests updated accordingly
Related: #5680 (if already merged, this consolidates remaining changes)
Anthony Stirling
7111f0d2df