后端长时间下载，临时token 续期bug 修复

IRaCIS.Core.Application/Helper/OSSService.cs

@@ -220,7 +220,7 @@ public class OSSService(IOptionsMonitor<ObjectStoreServiceOptions> options,
     public object result { get; private set; }
 
 
-
+    private static readonly object _tokenLock = new();
 
     /// <summary>
     /// 将指定前缀下的所有现有文件立即转为目标存储类型
@@ -934,32 +934,52 @@ public class OSSService(IOptionsMonitor<ObjectStoreServiceOptions> options,
     //后端批量上传 或者下载，不每个文件获取临时token
     private void BackBatchGetToken()
     {
+
+
+
+
         if (ObjectStoreServiceOptions.ObjectStoreUse == "AliyunOSS")
         {
-            if (AliyunOSSTempToken == null)
+            if (AliyunOSSTempToken != null && AliyunOSSTempToken.Expiration > DateTime.UtcNow.AddMinutes(15))
             {
-                GetObjectStoreTempToken();
-            }
-            //token 过期了
-            if (AliyunOSSTempToken?.Expiration.AddSeconds(10) <= DateTime.Now)
-            {
-                GetObjectStoreTempToken();
+                return;
             }
 
+            lock (_tokenLock)
+            {
+                if (AliyunOSSTempToken == null ||
+                    AliyunOSSTempToken.Expiration <= DateTime.UtcNow.AddMinutes(15))
+                {
+                    GetObjectStoreTempToken();
+
+                    Log.Logger.Warning("后端获取阿里云临时 Token");
+                }
+            }
 
         }
         else if (ObjectStoreServiceOptions.ObjectStoreUse == "AWS")
         {
-            if (AWSTempToken == null)
+
+
+            if (AWSTempToken != null && AWSTempToken.Expiration > DateTime.UtcNow.AddMinutes(15))
             {
-                GetObjectStoreTempToken();
+                return;
             }
-            //token 过期了
-            if (AWSTempToken.Expiration?.AddSeconds(10) <= DateTime.Now)
+
+            lock (_tokenLock)
             {
-                GetObjectStoreTempToken();
+                if (AWSTempToken == null ||
+                    AWSTempToken.Expiration <= DateTime.UtcNow.AddMinutes(15))
+                {
+                    GetObjectStoreTempToken();
+
+                    Log.Logger.Warning("后端获取s3 临时 Token");
+                }
             }
+
         }
+
+
     }