refactor : 重构代码

Assets/YooAsset/Runtime/DownloadSystem/Services/UnityWebRequest/UnityWebRequestBytes.cs

@@ -0,0 +1,52 @@
+using System;
+using UnityEngine.Networking;
+
+namespace YooAsset
+{
+    /// <summary>
+    /// UnityWebRequest 字节下载器
+    /// </summary>
+    /// <remarks>
+    /// 将下载内容保存到内存中的字节数组。
+    /// </remarks>
+    internal sealed class UnityWebRequestBytes : UnityWebRequestBase, IDownloadBytesRequest
+    {
+        private readonly DownloadDataRequestArgs _args;
+
+        /// <summary>
+        /// 下载结果（字节数组）
+        /// </summary>
+        public byte[] Result { get; private set; }
+
+        /// <summary>
+        /// 构造字节数组下载器
+        /// </summary>
+        /// <param name="args">数据下载参数</param>
+        /// <param name="webRequestCreator">UnityWebRequest 创建器（可选）</param>
+        public UnityWebRequestBytes(DownloadDataRequestArgs args, UnityWebRequestCreator webRequestCreator)
+            : base(args.URL, webRequestCreator)
+        {
+            _args = args;
+        }
+
+        /// <summary>
+        /// 创建 UnityWebRequest
+        /// </summary>
+        protected override void CreateWebRequest()
+        {
+            var handler = new DownloadHandlerBuffer();
+            _webRequest = CreateGetRequest(URL);
+            _webRequest.downloadHandler = handler;
+            _webRequest.disposeDownloadHandlerOnDispose = true;
+            ConfigureRequest(_args.Timeout, _args.WatchdogTimeout, _args.Headers);
+        }
+
+        /// <summary>
+        /// 请求成功时的回调
+        /// </summary>
+        protected override void OnRequestSucceed()
+        {
+            Result = _webRequest.downloadHandler.data;
+        }
+    }
+}