From 132baf10e54c8fc2ae374ff15fbd75cccfdb2651 Mon Sep 17 00:00:00 2001
From: chronolaw <chrono_cpp@me.com>
Date: Sat, 14 Oct 2023 17:41:22 +0800
Subject: [PATCH] replace_dashes_lower

---
 kong/router/atc.lua    | 4 ++--
 kong/router/compat.lua | 6 +++---
 kong/tools/string.lua  | 6 ++++++
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/kong/router/atc.lua b/kong/router/atc.lua
index 095095fc94b2..7c59cba03b4d 100644
--- a/kong/router/atc.lua
+++ b/kong/router/atc.lua
@@ -562,7 +562,7 @@ local get_queries_key
 do
   local tb_sort = table.sort
   local tb_concat = table.concat
-  local replace_dashes = require("kong.tools.string").replace_dashes
+  local replace_dashes_lower = require("kong.tools.string").replace_dashes_lower
 
   local str_buf = buffer.new(64)
 
@@ -571,7 +571,7 @@ do
 
     -- NOTE: DO NOT yield until str_buf:get()
     for name, value in pairs(headers) do
-      local name = replace_dashes(name):lower()
+      local name = replace_dashes_lower(name)
 
       if type(value) == "table" then
         for i, v in ipairs(value) do
diff --git a/kong/router/compat.lua b/kong/router/compat.lua
index d76c741d63ef..6da3522f4698 100644
--- a/kong/router/compat.lua
+++ b/kong/router/compat.lua
@@ -10,8 +10,8 @@ local tb_nkeys = require("table.nkeys")
 local uuid = require("resty.jit-uuid")
 
 
-local shallow_copy    = require("kong.tools.utils").shallow_copy
-local replace_dashes  = require("kong.tools.string").replace_dashes
+local shallow_copy          = require("kong.tools.utils").shallow_copy
+local replace_dashes_lower  = require("kong.tools.string").replace_dashes_lower
 
 
 local is_regex_magic  = utils.is_regex_magic
@@ -252,7 +252,7 @@ local function get_expression(route)
       single_header_buf:reset():put("(")
 
       for i, value in ipairs(v) do
-        local name = "any(http.headers." .. replace_dashes(h):lower() .. ")"
+        local name = "any(http.headers." .. replace_dashes_lower(h) .. ")"
         local op = OP_EQUAL
 
         -- value starts with "~*"
diff --git a/kong/tools/string.lua b/kong/tools/string.lua
index 3340de41b31a..3ed03a5d293a 100644
--- a/kong/tools/string.lua
+++ b/kong/tools/string.lua
@@ -6,6 +6,7 @@ local _M = {}
 
 
 local replace_dashes
+local replace_dashes_lower
 do
   local str_replace_char
 
@@ -31,8 +32,13 @@ do
   replace_dashes = function(str)
     return str_replace_char(str, "-", "_")
   end
+
+  replace_dashes_lower = function(str)
+    return str_replace_char(str:lower(), "-", "_")
+  end
 end
 _M.replace_dashes = replace_dashes
+_M.replace_dashes_lower = replace_dashes_lower
 
 
 return _M