From 9d95aecd6f77e556ece83188770106a3669c2b81 Mon Sep 17 00:00:00 2001
From: xfy <i@rua.plus>
Date: Thu, 16 Apr 2026 18:24:05 +0800
Subject: [PATCH] =?UTF-8?q?refactor(lua):=20=E6=8F=90=E5=8F=96=E5=B8=B8?=
 =?UTF-8?q?=E9=87=8F=E5=B9=B6=E4=BC=98=E5=8C=96=E7=BB=93=E6=9E=84=E4=BD=93?=
 =?UTF-8?q?=E5=AD=97=E6=AE=B5=E5=B8=83=E5=B1=80?=
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- api_var.go: 提取 argPrefix 常量，消除魔法字符串
- coroutine.go: 按逻辑分组重排 LuaCoroutine 字段，改善可读性

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 internal/lua/api_var.go   | 11 +++++++----
 internal/lua/coroutine.go | 16 +++++++---------
 2 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/internal/lua/api_var.go b/internal/lua/api_var.go
index 49b33db..ad5ad1d 100644
--- a/internal/lua/api_var.go
+++ b/internal/lua/api_var.go
@@ -8,6 +8,9 @@ import (
 	glua "github.com/yuin/gopher-lua"
 )
 
+// argPrefix 是 arg_ 变量的前缀，用于获取查询参数
+const argPrefix = "arg_"
+
 // ngxVarAPI ngx.var API 实现
 type ngxVarAPI struct {
 	// 请求上下文
@@ -166,12 +169,12 @@ func (api *ngxVarAPI) getVariableLua(name string) glua.LValue {
 		return glua.LString(string(api.ctx.Host()))
 
 	// URI 参数
-	case "arg_":
+	case argPrefix:
 		// 获取所有参数
 		return glua.LString(string(api.ctx.URI().QueryString()))
 	default:
 		// 检查是否是 arg_ 开头的参数
-		if len(name) > 4 && name[:4] == "arg_" {
+		if len(name) > len(argPrefix) && name[:len(argPrefix)] == argPrefix {
 			paramName := name[4:]
 			return glua.LString(string(api.ctx.QueryArgs().Peek(paramName)))
 		}
@@ -244,10 +247,10 @@ func (api *ngxVarAPI) getVariable(name string) string {
 		return ""
 	case "server_name":
 		return string(api.ctx.Host())
-	case "arg_":
+	case argPrefix:
 		return string(api.ctx.URI().QueryString())
 	default:
-		if len(name) > 4 && name[:4] == "arg_" {
+		if len(name) > len(argPrefix) && name[:len(argPrefix)] == argPrefix {
 			paramName := name[4:]
 			return string(api.ctx.QueryArgs().Peek(paramName))
 		}
diff --git a/internal/lua/coroutine.go b/internal/lua/coroutine.go
index 60b03c1..2b7e5ac 100644
--- a/internal/lua/coroutine.go
+++ b/internal/lua/coroutine.go
@@ -63,19 +63,17 @@ func (p Phase) String() string {
 type LuaCoroutine struct {
 	CreatedAt        time.Time
 	ExecutionContext context.Context
-	Engine           *LuaEngine
-	Co               *glua.LState
-	Cancel           context.CancelFunc
+	ngxReqAPI        *ngxReqAPI
 	RequestCtx       *fasthttp.RequestCtx
+	Co               *glua.LState
+	ngxVarAPI        *ngxVarAPI
+	ngxRespAPI       *ngxRespAPI
+	ngxLogAPI        *ngxLogAPI
+	Cancel           context.CancelFunc
 	executionCancel  context.CancelFunc
+	Engine           *LuaEngine
 	OutputBuffer     []byte
 	Exited           bool
-
-	// ngx API 实例（用于测试和 Go 层访问）
-	ngxVarAPI  *ngxVarAPI
-	ngxReqAPI  *ngxReqAPI
-	ngxRespAPI *ngxRespAPI
-	ngxLogAPI  *ngxLogAPI
 }
 
 // SetupSandbox 创建 per-request _ENV 沙箱