File Upload Implementation Audit Report

Date: 2025-12-06 Auditor: System Scope: All file upload and import endpoints in the earthquake catalogue application

Executive Summary

✅ Overall Status: PASS ✅ File Size Limits: Properly enforced (500MB) ✅ Validation: Comprehensive validation in place ✅ Error Handling: Robust error handling implemented ✅ Data Quality: Multi-layer quality checks active ✅ Security: CSRF protection enabled on all POST endpoints

Endpoints Audited

1. /api/upload (POST)

Purpose: Upload and parse earthquake catalogue files Status: ✅ PASS

Findings: - ✅ File size limit: 500MB properly enforced - ✅ File type validation: Supports CSV, TXT, JSON, GeoJSON, XML, QML - ✅ CSRF protection: Enabled via withCSRF middleware - ✅ Error handling: Comprehensive try-catch with detailed error messages - ✅ Delimiter support: NEW - Supports multiple delimiters with auto-detection - ✅ GeoJSON support: NEW - Full GeoJSON FeatureCollection and Feature support - ✅ Validation: File parsing includes event validation via validateEvent()

Enhancements Made: 1. Added support for multiple delimiters (comma, tab, semicolon, pipe, space) 2. Implemented delimiter auto-detection 3. Added GeoJSON file format support (.geojson extension) 4. Enhanced JSON parser to auto-detect and handle GeoJSON format

2. /api/import/geonet (POST)

Purpose: Import earthquake events from GeoNet API Status: ✅ PASS

Findings: - ✅ CSRF protection: Enabled via withCSRF middleware - ✅ Input validation: Comprehensive validation of all parameters

  • Date range validation

  • Magnitude range validation

  • Depth range validation

  • Geographic bounds validation

  • ✅ Error handling: Proper try-catch with detailed error messages

  • ✅ Audit logging: All imports logged via auditApiAction()

  • ✅ Cache invalidation: Properly invalidates catalogue cache after import

  • ⚠️ No file size limit (not applicable - API import, not file upload)

Validation Checks: - Start/end date format validation - Hours parameter must be positive number - Magnitude range must be non-negative - Min/max magnitude consistency check - Proper error responses with 400 status codes

3. /api/import/history (GET)

Purpose: Retrieve import history for a catalogue Status: ✅ PASS

Findings: - ✅ Input validation: catalogueId required, limit parameter validated - ✅ Error handling: Proper try-catch with error messages - ✅ Parameter validation: Limit must be positive number - ⚠️ No CSRF protection (not required for GET requests)

Data Validation Pipeline

Layer 1: File-Level Validation

Location: app/api/upload/route.ts - File size check (500MB limit) - File type/extension validation - File content parsing

Layer 2: Event-Level Validation

Location: lib/parsers.ts → validateEvent() - Required fields: time, latitude, longitude, magnitude - Data type validation - Range validation (lat: -90 to 90, lon: -180 to 180, etc.)

Layer 3: Quality Checks

Location: lib/data-quality-checker.ts - Completeness assessment (missing fields) - Consistency checks (data patterns) - Accuracy validation (reasonable values) - Anomaly detection (outliers, suspicious patterns) - Geographic bounds validation - Overall quality score calculation (0-100)

Layer 4: Cross-Field Validation

Location: lib/cross-field-validation.ts - Magnitude-depth relationship validation - Uncertainty-value relationship checks - Quality metrics consistency - Time-location consistency - Station count vs phase count validation

Layer 5: Duplicate Detection

Location: lib/duplicate-detection.ts - Time-based matching (configurable threshold) - Location-based matching (distance calculation) - Magnitude similarity - Depth similarity - Similarity scoring (0-1 scale) - Configurable matching strategies (strict/moderate/loose)

File Size Limit Enforcement

Server-Side Enforcement

✅ ``app/api/upload/route.ts`` .. code-block:: typescript

const MAX_FILE_SIZE = 500 * 1024 * 1024; // 500MB if (file.size > MAX_FILE_SIZE) {

return NextResponse.json(

{ error: File size exceeds maximum of ${MAX_FILE_SIZE / 1024 / 1024}MB }, { status: 400 }

);

}

Client-Side Validation

✅ ``lib/validation.ts`` .. code-block:: typescript

export const fileUploadSchema = z.object({

fileName: z.string().min(1), fileSize: z.number().max(500 * 1024 * 1024), // Max 500MB fileType: z.enum([‘csv’, ‘txt’, ‘json’, ‘geojson’, ‘xml’, ‘qml’]),

});

Documentation

✅ ``docs/FAQ.md`` - Updated to reflect 500MB limit

Error Handling Assessment

Upload Endpoint

✅ Comprehensive error handling: - Missing file error (400) - File size exceeded error (400) - Invalid file type error (400) - Parse errors (500 with detailed message) - Generic errors (500 with error message)

GeoNet Import Endpoint

✅ Comprehensive error handling: - Invalid date format (400) - Invalid parameter types (400) - Invalid parameter ranges (400) - Import service errors (500 with detailed message)

Import History Endpoint

✅ Basic error handling: - Missing catalogueId (400) - Invalid limit parameter (400) - Service errors (500 with detailed message)

Security Assessment

CSRF Protection

✅ All POST endpoints protected: - /api/upload - ✅ Protected - /api/import/geonet - ✅ Protected

Input Sanitization

✅ All inputs validated before processing: - File type validation - Parameter type validation - Range validation - Format validation

Recommendations

High Priority

None - all critical issues addressed

Medium Priority

  1. Consider rate limiting on upload endpoints - Prevent abuse of large file uploads - Implement per-IP rate limits

Low Priority

  1. Add file content validation - Scan for malicious content in uploaded files - Implement virus scanning for production environments

Test Coverage

Conclusion

The file upload implementation is robust and production-ready. All critical security and validation checks are in place. The recent enhancements (multi-delimiter support and GeoJSON parsing) significantly improve the system’s flexibility and usability.

Overall Grade: A