refactor : 重构代码

Assets/YooAsset/Runtime/DownloadSystem/DownloadSystemTools.cs

@@ -0,0 +1,93 @@
+
+namespace YooAsset
+{
+    /// <summary>
+    /// 下载系统工具类
+    /// </summary>
+    /// <remarks>
+    /// 提供跨平台的 URL 转换和判断功能。
+    /// </remarks>
+    internal class DownloadSystemTools
+    {
+        /// <summary>
+        /// 转换为本地文件请求地址
+        /// </summary>
+        /// <param name="path">本地文件路径</param>
+        /// <returns>可用于 UnityWebRequest 的文件协议 URL</returns>
+        public static string ToLocalURL(string path)
+        {
+            string url;
+
+            // 获取对应平台的URL地址
+            // 说明：苹果不同设备上操作系统不同。
+            // 说明：iPhone和iPod对应的是iOS系统。
+            // 说明：iPad对应的是iPadOS系统。
+            // 说明：AppleTV对应的是tvOS系统。
+#if UNITY_EDITOR_OSX
+            url = StringUtility.Format("file://{0}", path);
+#elif UNITY_EDITOR_WIN
+            url = StringUtility.Format("file:///{0}", path);
+#elif UNITY_WEBGL
+            url = path;
+#elif UNITY_IOS || UNITY_IPHONE
+            url = StringUtility.Format("file://{0}", path);
+#elif UNITY_ANDROID
+            if (path.StartsWith("jar:file://"))
+                url = path;
+            else
+                url = StringUtility.Format("jar:file://{0}", path);
+#elif UNITY_OPENHARMONY
+            if (UnityEngine.Application.streamingAssetsPath.StartsWith("jar:file://"))
+            {
+                if (path.StartsWith("jar:file://"))
+                    url = path;
+                else
+                    url = StringUtility.Format("jar:file://{0}", path);
+            }
+            else
+            {
+                if (path.StartsWith("file://"))
+                    url = path;
+                else
+                    url = StringUtility.Format("file://{0}", path);
+            }
+
+#elif UNITY_WSA
+            url = StringUtility.Format("file:///{0}", path);
+#elif UNITY_TVOS
+            url = StringUtility.Format("file:///{0}", path);
+#elif UNITY_STANDALONE_OSX
+            url = new System.Uri(path).ToString();
+#elif UNITY_STANDALONE_WIN
+            url = StringUtility.Format("file:///{0}", path);
+#elif UNITY_STANDALONE_LINUX
+            url = StringUtility.Format("file:///root/{0}", path);
+#else
+            throw new System.NotSupportedException($"Platform '{UnityEngine.Application.platform}' is not supported.");
+#endif
+
+            // 处理特殊字符：用户设备路径可能包含特殊字符导致 URL 无法正确识别
+            return url.Replace("+", "%2B").Replace("#", "%23").Replace("?", "%3F");
+        }
+
+        /// <summary>
+        /// 判断是否为本地文件 URL
+        /// </summary>
+        /// <param name="url">要判断的 URL</param>
+        /// <returns>如果是本地文件 URL 返回 true，否则返回 false</returns>
+        public static bool IsLocalFileURL(string url)
+        {
+            //TODO UNITY_STANDALONE_OSX平台目前无法确定
+
+            // 本地文件传输协议
+            if (url.StartsWith("file:"))
+                return true;
+
+            // JAR文件协议
+            if (url.StartsWith("jar:file:"))
+                return true;
+
+            return false;
+        }
+    }
+}