first commit

middleware/middleware.go

@@ -0,0 +1,37 @@
+package middleware
+
+import (
+	"log"
+	"net/http"
+	"time"
+)
+
+// Logger HTTP 요청 로깅 미들웨어
+func Logger(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+		next.ServeHTTP(w, r)
+		log.Printf("%s %s %s", r.Method, r.RequestURI, time.Since(start))
+	})
+}
+
+// Recovery 패닉 발생 시 500 응답으로 복구하는 미들웨어
+func Recovery(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		defer func() {
+			if err := recover(); err != nil {
+				log.Printf("패닉 복구: %v", err)
+				http.Error(w, "내부 서버 오류가 발생했습니다.", http.StatusInternalServerError)
+			}
+		}()
+		next.ServeHTTP(w, r)
+	})
+}
+
+// Chain 여러 미들웨어를 순서대로 체인
+func Chain(h http.Handler, middlewares ...func(http.Handler) http.Handler) http.Handler {
+	for i := len(middlewares) - 1; i >= 0; i-- {
+		h = middlewares[i](h)
+	}
+	return h
+}