/* * * (c) Copyright Ascensio System Limited 2010-2021 * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * http://www.apache.org/licenses/LICENSE-2.0 * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ using System; using System.IO; namespace ASC.Common { [Singletone] public class TempStream { private TempPath TempPath { get; } public TempStream(TempPath tempPath) { TempPath = tempPath; } public Stream GetBuffered(Stream srcStream) { if (srcStream == null) throw new ArgumentNullException(nameof(srcStream)); if (!srcStream.CanSeek || srcStream.CanTimeout) { //Buffer it var memStream = Create(); srcStream.CopyTo(memStream); memStream.Position = 0; return memStream; } return srcStream; } public Stream Create() { return new FileStream(TempPath.GetTempFileName(), FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.Read, 4096, FileOptions.DeleteOnClose); } } }