middleware

name	middleware
description	Express middleware olusturur. Kullan: /middleware auth, /middleware error-handler, /middleware request-logger, /middleware rate-limiter

$ARGUMENTS icin Express middleware olustur.

Dosya konumu

backend/src/middleware/<ad>.ts

Middleware turleri

auth

• JWT token dogrulama (Authorization: Bearer )
• Token yoksa 401 don
• Token gecersizse 401 don
• req.user'a decode edilmis token bilgisini ekle
• Korunan route'lara authMiddleware olarak ekle

error-handler

• Global error handling middleware
• Bilinen hatalari yakalanmis response'a donustur
• Bilinmeyen hatalarda 500 don
• Uretimde stack trace GOSTERME
• Hata log'la (console.error)
• Response: { success: false, message: "...", code?: "..." }

request-logger

• Her istegi logla: method, url, status, sure (ms)
• Renkli cikti (GET=yesil, POST=mavi, DELETE=kirmizi)
• Body'yi loglama (guvenlik)
• Response time hesapla

rate-limiter

• IP bazli istek siniri
• Yapilandirmali: windowMs, maxRequests
• Sinir asilinca 429 Too Many Requests don
• Map ile basit in-memory sayac (demo icin yeterli)

validate

• Zod schema ile request body dogrulama
• Gecersiz body'de 400 + detayli hata mesajlari don
• Fabrika fonksiyonu: validate(schema) → middleware dondur

Kurallar

• TypeScript tipli (Request, Response, NextFunction)
• any tipi YASAK
• next() cagrisi unutma
• Async hatalari yakala (async middleware icin try-catch)
• backend/src/index.ts'e middleware'i import edip uygun siraya ekle