From 46567174cfcd6e6f176211aa7caef950f07559fb Mon Sep 17 00:00:00 2001
From: Qi <add_sp@outlook.com>
Date: Mon, 12 Aug 2024 17:20:46 +0800
Subject: [PATCH] fix(kong.tools.http): ensure the `EMPTY` table returned by
 `parse_directive_header` is readonly (#13491)

Panic on writing the EMPTY table

* Fix https://github.com/Kong/kong/pull/13458
* https://konghq.atlassian.net/browse/KAG-5139?
---
 kong/tools/http.lua | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kong/tools/http.lua b/kong/tools/http.lua
index 7101470e0e5d..ef3839739000 100644
--- a/kong/tools/http.lua
+++ b/kong/tools/http.lua
@@ -1,5 +1,6 @@
 local pl_path = require "pl.path"
 local pl_file = require "pl.file"
+local pl_tblx = require "pl.tablex"
 
 
 local type          = type
@@ -23,7 +24,7 @@ local lower         = string.lower
 local max           = math.max
 local tab_new       = require("table.new")
 
-local EMPTY = {}
+local EMPTY = pl_tblx.readonly({})
 
 local _M = {}