frontend performance, rpc/rest jwt authentication

server/middleware/jwt.go

@@ -0,0 +1,50 @@
+package middlewares
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/golang-jwt/jwt/v5"
+	"github.com/marcopeocchi/yt-dlp-web-ui/server/config"
+)
+
+const (
+	TOKEN_COOKIE_NAME = "jwt"
+)
+
+var Authenticated = func(c *fiber.Ctx) error {
+	if !config.Instance().GetConfig().RequireAuth {
+		return c.Next()
+	}
+
+	cookie := c.Cookies(TOKEN_COOKIE_NAME)
+
+	if cookie == "" {
+		return c.Status(fiber.StatusUnauthorized).SendString("invalid token")
+	}
+
+	token, _ := jwt.Parse(cookie, func(t *jwt.Token) (interface{}, error) {
+		if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, fmt.Errorf("unexpected signing method: %v", t.Header["alg"])
+		}
+		return []byte(os.Getenv("JWTSECRET")), nil
+	})
+
+	if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
+		expiresAt, err := time.Parse(time.RFC3339, claims["expiresAt"].(string))
+
+		if err != nil {
+			return c.SendStatus(fiber.StatusInternalServerError)
+		}
+
+		if time.Now().After(expiresAt) {
+			return c.Status(fiber.StatusBadRequest).SendString("expired token")
+		}
+	} else {
+		return c.Status(fiber.StatusUnauthorized).SendString("invalid token")
+	}
+
+	return c.Next()
+}