Enhance Error Handling and Middleware for Robust File Service Infrastructure

[region999]

Enhance Error Handling and Middleware for Robust File Service Infrastructure

Description

Summary of Work

This pull request introduces a comprehensive error handling and middleware infrastructure for our CDN file service, focusing on improving reliability, security, and developer experience.

Our goal is to create a more resilient file handling system that provides clear, actionable error responses while maintaining a clean, type-safe implementation. The changes span error handling mechanisms, middleware design, and type safety improvements.

Key Objectives:

• Implement a robust error handling framework
• Provide clear, secure error communication
• Enhance file access permission checks
• Improve overall system reliability and security

By consolidating these changes, we've created a more predictable and maintainable approach to file service error management that can be easily extended and integrated across our infrastructure.

Changes Made

Error Handling Improvements:

• Introduced custom FileAccessError for precise error tracking
• Developed comprehensive Express middleware for consistent error responses
• Implemented safe, async file access permission checking mechanism

Architectural Enhancements:

• Added TypeScript type definitions for improved type safety
• Created modular error handling utilities in src/fileErrorHandler.ts
• Standardized error response formats across the application

Middleware and Utility Developments:

• Developed fileErrorHandler middleware for global error management
• Created checkFileAccess utility function for secure file permission verification
• Configured error responses to provide clear, actionable information without exposing sensitive details

Tests and Verification

Test Coverage Verification:

• Implemented comprehensive unit tests for error handling scenarios
• Verified error response handling for:
  • File access permission denied
  • Non-existent file scenarios
  • Generic error fallback mechanisms
• Validated type safety and error propagation
• Ensured middleware correctly handles different error types and scenarios

Test Scope:

• Added tests in tests/fileErrorHandler.test.ts
• Expanded test coverage for edge cases
• Verified consistent error response formats
• Validated security-focused error handling approaches

PRs Merged

The following pull requests have been merged:

• #10: [WIP] Implement Secure File Upload Endpoint for CDN Management from @LearnHD
• #11: Implement Local File Storage Mechanism with Robust File Management from @Santix1234
• #12: Implement Comprehensive File Upload Error Handling from @Vuk7912
• #13: Implement Unique File Identifier Generation Utility from @gapcomputer
• #14: Implement Secure File Upload Endpoint with Validation and Error Handling from @Jockstrap6334
• #15: Configure Multer Middleware for Secure File Uploads from @tomaszlt

Signatures

Staking Key

7oaqZynDyofbf7nd44SVojunSNhuwbDy6ERpJ6Z4G26W: 4B2vm4J8x2EUpXAb4ibGDEPbVvwght5pE8ZEE5rfS2gvy6WmADGXWSHa4xKEemUrLQ2nzeCjzdf7pEXScv4JQxPJEfPeuYuEfqdYDvE3AxM9kvLoZufB4FTtXAh3hApoaH7J9mXdwMrBsjkffLRLspcAtbtNifzdawMhqf6c3UhTWkWordkGLQnNPRRMfD4DoycS9N9Jbx1EDUUUdm2NAHrXEyqnuWrz9dA1RinDwuFJYpTWTZiH4t851Yx9dDFmjRSnvgA5Fw3Wdfc9NHUWCD6X6vvdQJRQcK3GJjAgZscM2ra9WHJg1sNTuxbAqx7FHXRw4rHZ1UHqehSYm85Z3sa9g3UUFJUHtcGxbWkyHf4reYcLJTKHdBhvUyy846dNuvogLwjiTXkviFxewr3VgKDibrwadpYQMaknx

Public Key

3Uzqdi1MnBy7VWn6dgtScadiZLsv2XjFXnhv4VZe5GE4: 2QhEHPerMBfJucEMqGBJNKjHSuViJENKkz6u6WTbhUPBpbEmpN1Mdo2NRCjNWCEGG8ZfwyffsK18FXW3w97aCMMsQYerf6eVfDZbdh3HpxqcZZq5Uo8aH3E7LvfqC3d4jWd1nm1LmXBn8Nqu41msqFoz7JvBoUTfXu3Cd7iieau9dPPhxQcFN37eZiRzCGwvywSdEcwfpvb9Pe7NYhh9SY38PHUr9LQ2uuaXYwpHQy5h4JVtqnXtMfUvmRUzE6pafbGFC64BEmqRMY6QqZcRycRmbH8Zsiggud2usFahhj27Wj7gmKGMvY814oMxVbn9v6KtJoeKCq5GLKPdJWzJmAfSjtVxY5YtQDzoXF8VQ3qGj1ZWc9KaeBqURLej2u85sE6NjTSDFGSyQLLDnU6VUCXQx2ZhmnEHgNGDr