download on single file directly

code/rest/matter_service.go

@@ -127,15 +127,17 @@ func (this *MatterService) DownloadZip(
 		}
 	}
 
+	destZipName := matters[0].Name
+	if len(matters) == 1 && !matters[0].Dir {
+		download.DownloadFile(writer, request, matters[0].AbsolutePath(), destZipName, true)
+		return
+	}
+
 	//prepare the temp zip dir
 	destZipDirPath := fmt.Sprintf("%s/%d", GetUserZipRootDir(matters[0].Username), time.Now().UnixNano()/1e6)
 	util.MakeDirAll(destZipDirPath)
 
-	destZipName := fmt.Sprintf("%s.zip", matters[0].Name)
+	destZipName = "archive.zip"
-	if len(matters) > 1 || !matters[0].Dir {
-		destZipName = "archive.zip"
-	}
-
 	destZipPath := fmt.Sprintf("%s/%s", destZipDirPath, destZipName)
 
 	this.zipMatters(request, matters, destZipPath)