GetDefaultRecordKey() 支持非 Windows 操作系统

Author: bachue

src/Qiniu/Storage/ResumeHelper.cs

@@ -22,7 +22,7 @@ public static string GetDefaultRecordKey(string localFile, string key)
             string tempDir = System.Environment.GetEnvironmentVariable("TEMP");
             System.IO.FileInfo fileInfo = new System.IO.FileInfo(localFile);
             string uniqueKey = string.Format("{0}:{1}:{2}", localFile, key, fileInfo.LastWriteTime.ToFileTime());
-            return string.Format("{0}\\{1}",tempDir,"QiniuResume_" + Hashing.CalcMD5X(uniqueKey));
+            return Path.Combine(tempDir, "QiniuResume_" + Hashing.CalcMD5X(uniqueKey));
         }
 
         /// <summary>
@@ -71,4 +71,4 @@ public static void Save(ResumeInfo resumeInfo, string recordFile)
             }
         }
     }
-}
+}