Implement Secure File Upload Endpoint with Validation and Error Handling

[Jockstrap6334]

Implement Secure File Upload Endpoint with Validation and Error Handling

Description

Task

Create POST /upload endpoint for file uploads

Acceptance Criteria

• Supports file uploads via POST /upload
• Validates file type and size
• Generates unique file identifiers
• Handles upload errors gracefully
• Returns consistent JSON responses

Summary of Work

This pull request adds a robust file upload endpoint to the CDN management server, providing secure and validated file uploads.

Changes Made

• Implemented POST /upload endpoint in src/routes/uploadRoutes.ts
• Created comprehensive file upload service in src/services/fileUploadService.ts
• Added file validation logic with the following constraints:
  • Maximum file size: 10MB
  • Supported file types: JPEG, PNG, GIF, PDF
• Generated unique file identifiers using UUID
• Implemented error handling and detailed response generation

Implementation Details

• Uses multer for file parsing
• Validates file type and size before storage
• Generates unique filename using UUID and original file extension
• Stores files in a configurable upload directory
• Provides consistent JSON response for upload success/failure

Validation Checks

• File existence validation
• File size limit (10MB)
• Allowed MIME type check
• Unique file identifier generation
• Secure file storage with error handling

Testing Approach

• Validated file upload scenarios
• Tested file type and size restrictions
• Verified unique identifier generation
• Ensured proper error handling for various upload conditions

Notes

• Upload directory is created automatically if it doesn't exist
• Supports easy extension of allowed file types
• Provides flexible configuration for upload constraints

Changes Made

• Created POST /upload endpoint in uploadRoutes.ts
• Implemented file validation in fileUploadService.ts
• Added file size and type restrictions
• Generated unique file identifiers
• Implemented comprehensive error handling

Tests

• Verify file upload with valid file
• Test file upload with unsupported file type
• Check file upload with oversized file
• Validate unique file identifier generation
• Ensure proper error responses for upload failures

Signatures

Staking Key

DWBqahm2PaMoi28xYhwk66LkLYbZw7Df7AKb5hKRrBf: 4iBnyWKbrn2Ly8MnpLAZ9Vezp1oexvk3ju5ztSCfSRsE6sgysKr8bs862zsMCcPkHXZ9drVEekyJvMgCZfkYhy3fRsbgKZVQLnF3stRZMbJVWMqk92RZMmdhejPbbrA2FBJPKDucPSTzByv2x2Hm5MpKR1UakobWFdx2yt1pKh2AT74A7pQBGtcJQ1w4A14jJ58noinsKtP8Fk15Sk2CVD3j2C6wjErbaLyr9WDjbNkqQdqWr61nU43RnkqdQj4eyGggL54FfwoqHks1hT1yhsbV2Ai8jnLMH7CCWdWoHiSmYMnUvbektR3JobBjDLLwXESLpHPr9pvng1ZFbtHhj4rgadnqVt3kafXYiHp7mu2mfgD5GvCyevKkkiwdWvdZb7RS5xF7q17UtbycbPCkHtqDC46Y38oMgGQHmZit

Public Key

2zjmVMjbiRMA7LSoefNKBMkhZyoK7hVpVz3xJU7m2NxW: 4KALEmEZb7SfQNhg1jRKcbgfVzRpFsnTNUL2WeuzPDm1Et6fp5iypTwkFadV2FMhsafSWTuCheWrgK3UTbmugPjSYK4YESgQKsJ25j8LcuesWZcEaMRDys3iqfaFATb2cAbjrRzVr7VGKu9j5rPkLvdhn8YXcw8PeeVsfooTfcRFFJg7RAN1F3HsKw9uYzCLhodT7pFY9K9D1CnhMBPRsx23iYLFeLRBboCwi96Ysn2n5ger7wJ2FmwJKGBPbFkGsqRKSingug6brHYYBWBWEhhLbSMgZue8jp9yqSPUpd6u3jFNDjESEX2YYwY5DvziAQncabAwvWqAei3xwsaqWsaw1ZvY15kWD3ZhWqPzmPgpFfp63pR1hcGHxuxyMoEFqtLomWD9RRqyC4CfCCW9zYmnYVTbg1pBYz5p6Gwn