feat: report dir size correctly

route/route.go

@@ -12,6 +12,29 @@ import (
 	"github.com/gofiber/fiber/v2"
 )
 
+func RecursivelyGetSize(completePath string) (int64, error) {
+	files, err := os.ReadDir(completePath)
+	if err != nil {
+		return -1, err
+	}
+	var sum int64
+	for _, f := range files {
+		dirEntryInfo, err := f.Info()
+		if err != nil {
+			return -1, err
+		}
+		dirEntrySize := dirEntryInfo.Size()
+		if f.IsDir() {
+			dirEntrySize, err = RecursivelyGetSize(path.Join(completePath, f.Name()))
+			if err != nil {
+				return -1, err
+			}
+		}
+		sum += dirEntrySize
+	}
+	return sum, nil
+}
+
 func HandleList(c *fiber.Ctx) error {
 	encodedReq := c.Params("req")
 	req, err := url.QueryUnescape(encodedReq)
@@ -54,9 +77,16 @@ func HandleList(c *fiber.Ctx) error {
 				if err != nil {
 					return c.Status(fiber.StatusInternalServerError).SendString("Internal server error!")
 				}
+				dirEntrySize := dirEntryInfo.Size()
+				if f.IsDir() {
+					dirEntrySize, err = RecursivelyGetSize(path.Join(completePath, f.Name()))
+					if err != nil {
+						return c.Status(fiber.StatusInternalServerError).SendString(err.Error())
+					}
+				}
 				entries = append(entries, html.Entry{
 					Name:  f.Name(),
-					Size:  dirEntryInfo.Size(),
+					Size:  dirEntrySize,
 					IsDir: f.IsDir(),
 				})
 			}