 	}
 	
 	//文件已下载大小
-	func fileDownloadSize(_ url: String) -> Int? {
+	func fileDownloadSize(_ url: String) -> Int {
 		var filesize: Int?
 		do {
 			let attr = try FileManager.default.attributesOfItem(atPath: fileFullPath(url))

}

struct LQSessionModel {
	var stream: OutputStream
	var url: String
	var totalLength: Int
	var progressBlock: (Int, Int, Double) -> Void

		} catch {
			debugPrint("Error: \(error)")
		}
		guard let size = filesize else {
			return 0
		}
		return size
	}
	
	//存储文件总长度.plist的文件路径
