refactor: 重构中间件链，简化中间件执行逻辑

Author: AkimioJR

internal/router/middleware.go

@@ -31,3 +31,31 @@ func DisableCompression(internalFunc gin.HandlerFunc) gin.HandlerFunc {
 }
 
 var _ MiddlewareFunc = DisableCompression
+
+// MiddlewareChain 中间件链构建器
+type MiddlewareChain struct {
+	middlewares []MiddlewareFunc
+}
+
+// NewMiddlewareChain 创建新的中间件链
+func NewMiddlewareChain(middlewares ...MiddlewareFunc) *MiddlewareChain {
+	return &MiddlewareChain{
+		middlewares: middlewares,
+	}
+}
+
+// Add 添加中间件到链中
+func (mc *MiddlewareChain) Add(middleware MiddlewareFunc) *MiddlewareChain {
+	mc.middlewares = append(mc.middlewares, middleware)
+	return mc
+}
+
+// Execute 执行中间件链
+func (mc *MiddlewareChain) Execute(handler gin.HandlerFunc) gin.HandlerFunc {
+	// 从最后一个中间件开始，向前包装
+	result := handler
+	for i := len(mc.middlewares) - 1; i >= 0; i-- {
+		result = mc.middlewares[i](result)
+	}
+	return result
+}

internal/router/router.go

@@ -52,6 +52,10 @@ func InitRouter() *gin.Engine {
 	return ginR
 }
 
+var middlewareChain = NewMiddlewareChain().
+	Add(QueryKeyCaseInsensitive).
+	Add(DisableCompression)
+
 // 正则表达式路由处理器
 //
 // 从媒体服务器处理结构体中获取正则路由规则
@@ -63,7 +67,7 @@ func RegexpRouterHandler(ctx *gin.Context) {
 		if rule.Regexp.MatchString(ctx.Request.URL.Path) { // 不带查询参数的字符串：/emby/Items/54/Images/Primary
 			logging.Debugf("URL: %s 匹配成功 -> %s", ctx.Request.URL.Path, rule.Regexp.String())
 
-			QueryKeyCaseInsensitive(DisableCompression(rule.Handler))(ctx)
+			middlewareChain.Execute(rule.Handler)(ctx)
 			return
 		}
 	}