Bezbednost — security headers, fail2ban logovanje, bruteforce zaštita, CSRF zaštita

internal/middleware/bezbednost.go

@@ -0,0 +1,24 @@
+package middleware
+
+import "net/http"
+
+// BezbednostHeaders dodaje standardne HTTP security headere na svaki odgovor
+func BezbednostHeaders() func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			h := w.Header()
+			h.Set("X-Frame-Options", "DENY")
+			h.Set("X-Content-Type-Options", "nosniff")
+			h.Set("X-XSS-Protection", "1; mode=block")
+			h.Set("Referrer-Policy", "strict-origin-when-cross-origin")
+			h.Set("Content-Security-Policy",
+				"default-src 'self'; "+
+					"style-src 'self' 'unsafe-inline' https://cdn.tailwindcss.com; "+
+					"script-src 'self' 'unsafe-inline' https://cdn.tailwindcss.com https://cdn.jsdelivr.net; "+
+					"img-src 'self' data: blob:; "+
+					"font-src 'self'; "+
+					"connect-src 'self'")
+			next.ServeHTTP(w, r)
+		})
+	}
+}