Implement Local File Storage Mechanism with Robust File Management

[Santix1234]

Implement Local File Storage Mechanism with Robust File Management

Description

Task

Implement local file storage mechanism

Acceptance Criteria

• Secure local file storage mechanism
• Unique file identifier generation
• Configurable storage options
• Comprehensive error handling
• Support for various file types

Summary of Work

Overview

This pull request implements a robust local file storage mechanism for our CDN management system, providing comprehensive file handling capabilities with security and flexibility.

Changes Made

• Created LocalFileStorage class in src/services/local-file-storage.ts
• Implemented file storage methods with comprehensive error handling
• Added configurable options for file storage
• Integrated unique file identifier generation

Implementation Details

Key Components

1. File Storage Service

   • Uses fs-extra for enhanced filesystem operations
   • Generates unique file identifiers using UUID
   • Supports configurable base directory, max file size, and mime type restrictions

2. Methods Implemented

   • saveFile(): Saves files with unique identifiers
     • Validates file size
     • Generates unique filename
     • Writes file to specified directory
   • retrieveFile(): Retrieves files by identifier
   • deleteFile(): Removes files by identifier
   • listFiles(): Lists all stored file identifiers

3. Configuration Options

   • Default upload directory: uploads in current working directory
   • Default max file size: 10MB
   • Supports custom base directory and file size limits

Security Considerations

• Uses UUID for unique, unpredictable file identifiers
• Implements file size validation
• Prevents overwriting existing files
• Graceful error handling for file operations

Testing Approach

• Validated file save, retrieve, and delete operations
• Tested error scenarios like file size exceeding limit
• Verified unique identifier generation
• Confirmed directory creation and file management

Future Improvements

• Add mime type validation
• Implement more granular logging
• Create cloud storage adapter interface

Notes

• Requires fs-extra and uuid npm packages
• Default upload directory will be created if not exists

Changes Made

• Created LocalFileStorage class
• Implemented saveFile method
• Implemented retrieveFile method
• Implemented deleteFile method
• Added unique file identifier generation
• Added configurable storage options

Tests

• Verify file save operation
• Test file retrieval by identifier
• Check file deletion functionality
• Validate error handling for non-existent files
• Test file size limit enforcement

Signatures

Staking Key

DKCEYXWcoJrRVt9kB7nXZQkeL2MrNxobmbsWC8R3QWA8: 3bcfQLb3St2WVtkqhNraw5bvGXoBpDPVPoR5AbEqCkuQ5j1TLJDe1nRTFB2eiVaju669pL7GfkGMhpJvPo1YrKoSQmgRmTkicZNdF4nusbBCNfs2zmd7xMKNWUG5Ay3xb1EQ3aaRGC4qFGx6FxWCthoArpsX9c7GJav7ZnuxvRcDqH1Rado5gxom8wx2D8R8Z2AxLbiPNhQhb9GHm6mPUytbYXarBJx79KnbavY8ZdpLb8C7KuSWgvmPEuprZKP5Frd3sTmT2qdR8m4JdaGfZoLNa9HQhoDXrcZ7YhbZCnqsb7pLcfCRTeWTKwGbegTcHzfzCNwfvn6gr1HaQNBUm4ENYLUErSfnzNyRAqr3KPwJeuvYtJUJTPaRX1u33KccKNakkWKJdgwm4rAc4PUXcUdx8sjumoijWDFnc

Public Key

BLkTvPfFXvR52AK1EoHFaPyE1eDy6Mr5GvgWAbFMvK6x: 6WqfcmCHibufK6c7FWqmGgmZGs5QyX9yPHJYWGt1QWY7w3aCryVk5ENwxmo7jghUAvsmRf36dC5D3Lqb6Qw7k2NVpeoNChuppqi7sBSaoZLLJf99ZokVDvkP1AnGyJCsgZhYSGnFRGPJcYSNGTRMe8aWbfVnBS97mB78z8sWLabT6CV8MS5ac3EmLVdoVBo6DsgssGtRzUn4TkRSoAimdPGYfWtKi7r1q7N1WQLV9CVCBDeRKHetSCMY6xanguEscLSeY8sQKPDsAVyJBWA8G2GcPjJX8Vfa9b7vNUKHPGW7Uxdtofr6ByAcyUr82iRnFkSG6xKSM7CWTRi2W8Yea61sYAbCM8aFd3U3BQWxwEccWRGVEPFSzG1VkhBo775DW3TpDsCBNpq2ktHCbqoEVexQRKVrsFXgdUFvk