📄 CSV Processor API

A background file processor built with ASP.NET Core Web API. Users can upload CSV files which are then validated and processed asynchronously via a background worker. The system supports multiple file uploads, error handling, logging to file, authentication with JWT, and a summary endpoint for tracking file statistics.

🚀 Features

• ✅ Upload single or multiple CSV files
• ✅ JWT Authentication for secure endpoints
• 🔄 Background processing via BackgroundService
• ✅ CSV validation
• 🚨 Error tracking for invalid lines
• 📊 /api/stats endpoint for summary
• 📁 File-based logging using Serilog
• 🔐 JWT Authentication for all endpoints
• 🧹 Auto-cleanup every 6 hours for files older than 24h

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📦 Tech Stack

• C# (.NET 8)
• ASP.NET Core Web API
• Background Services
• Swagger / Swashbuckle
• In-Memory Queues
• Serilog File Logging
• JWT Authentication

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🔐 Authentication

This API uses JWT bearer authentication for simplicity.

🧪 Testing With Postman or Swagger

• Username : admin
• Password: password123

1. Use any JWT generator
2. Use this secret key: super-secret-token-key
3. Add token to Authorization header:

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🧪 API Endpoints

Upload

• POST /api/fileupload
  Upload a single CSV

• POST /api/fileupload/multiple
  Upload multiple files

Stats

• GET /api/stats
  Returns:

{
 "FilesProcessed": 2,
 "ErrorLines": [
   "[File: C:\\Temp\\file.csv] Name,,35"
 ]
}