diff --git a/drivers/plugins/counter/executor.go b/drivers/plugins/counter/executor.go
index 7d019991..5efd9a2c 100644
--- a/drivers/plugins/counter/executor.go
+++ b/drivers/plugins/counter/executor.go
@@ -51,6 +51,10 @@ func (b *executor) DoHttpFilter(ctx http_service.IHttpContext, next eocontext.IC
 		b.client = scope_manager.Auto[counter.IClient](b.clientID, "counter")
 		b.counterPusher = scope_manager.Auto[counter.ICountPusher](b.countPusherID, "counter-pusher")
 	})
+	body := ctx.Response().GetBody()
+	if len(body) < 1 {
+		return next.DoChain(ctx)
+	}
 
 	key := b.keyGenerate.Key(ctx)
 	ct, has := b.counters.Get(key)
diff --git a/entries/http-entry/reader.go b/entries/http-entry/reader.go
index 6135b2b4..baf10c13 100644
--- a/entries/http-entry/reader.go
+++ b/entries/http-entry/reader.go
@@ -191,7 +191,11 @@ var (
 			return ctx.Request().Header().GetHeader(strings.Replace(name, "_", "-", -1)), true
 		}),
 		"headers": ReadFunc(func(name string, ctx http_service.IHttpContext) (interface{}, bool) {
-			return ctx.Request().Header().Headers(), true
+			result := make(map[string]string)
+			for key, value := range ctx.Request().Header().Headers() {
+				result[strings.ToLower(key)] = strings.Join(value, ";")
+			}
+			return result, true
 		}),
 		"http": ReadFunc(func(name string, ctx http_service.IHttpContext) (interface{}, bool) {
 			return ctx.Request().Header().GetHeader(strings.Replace(name, "_", "-", -1)), true
@@ -220,7 +224,11 @@ var (
 				return ctx.Response().GetHeader(strings.Replace(name, "_", "-", -1)), true
 			}),
 			"headers": ReadFunc(func(name string, ctx http_service.IHttpContext) (interface{}, bool) {
-				return ctx.Response().Headers(), true
+				result := make(map[string]string)
+				for key, value := range ctx.Response().Headers() {
+					result[strings.ToLower(key)] = strings.Join(value, ";")
+				}
+				return result, true
 			}),
 			"status": ReadFunc(func(name string, ctx http_service.IHttpContext) (interface{}, bool) {
 				return ctx.Response().ProxyStatus(), true
@@ -233,6 +241,10 @@ var (
 			}),
 		},
 		"set_cookies": ReadFunc(func(name string, ctx http_service.IHttpContext) (interface{}, bool) {
+			cookies := ctx.Response().GetHeader("Set-Cookie")
+			if strings.TrimSpace(cookies) == "" {
+				return nil, true
+			}
 			return strings.Split(ctx.Response().GetHeader("Set-Cookie"), "; "), true
 		}),
 		"dst_ip": ReadFunc(func(name string, ctx http_service.IHttpContext) (interface{}, bool) {