feat(security): #286 implement csrf middleware

handler/middleware/authenticate.go

@@ -0,0 +1,47 @@
+package middleware
+
+import (
+	"context"
+	"me-fit/service"
+
+	"net/http"
+)
+
+type ContextKey string
+
+var SessionKey ContextKey = "session"
+
+func Authenticate(service service.Auth) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			sessionId := getSessionID(r)
+			session, _ := service.SignInSession(sessionId)
+
+			if session != nil {
+				ctx := context.WithValue(r.Context(), SessionKey, session)
+
+				next.ServeHTTP(w, r.WithContext(ctx))
+			} else {
+				next.ServeHTTP(w, r)
+			}
+		})
+	}
+}
+
+func GetSession(r *http.Request) *service.Session {
+	obj := r.Context().Value(SessionKey)
+	if obj == nil {
+		return nil
+	}
+
+	return obj.(*service.Session)
+}
+
+func getSessionID(r *http.Request) string {
+	cookie, err := r.Cookie("id")
+	if err != nil {
+		return ""
+	}
+
+	return cookie.Name
+}