Exemplo n.º 1
0
        public Stream IncreaseSize(int value, out long offset)
        {
            lock (_lock)
            {
                while (Interlocked.Read(ref _counter) != 0)
                {
                    if (!Monitor.Wait(_lock, 10000, true))
                        throw new NotSupportedException();
                }

                FileStream file = new FileStream(_filePath, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
                try
                {
                    offset = MathEx.RoundUp(file.Length, 0x800);
                    file.SetLength(offset + value);
                    _mmf = MemoryMappedFile.CreateFromFile(file, null, 0, MemoryMappedFileAccess.ReadWrite, null, HandleInheritability.Inheritable, false);
                }
                catch
                {
                    file.SafeDispose();
                    throw;
                }

                Interlocked.Increment(ref _counter);
                DisposableStream result = new DisposableStream(_mmf.CreateViewStream(offset, value, MemoryMappedFileAccess.ReadWrite));
                result.AfterDispose.Add(new DisposableAction(Free));
                return result;
            }
        }
        public static void Unzip(string targetDirectoryPath, ZipArchive archive)
        {
            foreach (var zipEntry in archive.Entries)
            {
                var outFilePath = Path.Combine(targetDirectoryPath, zipEntry.FullName);
                var outFileInfo = new FileInfo(outFilePath);
                if (!outFileInfo.Directory.Exists)
                {
                    outFileInfo.Directory.Create();
                }

                Stream outFileStream = null;
                Stream inputStream = null;
                try
                {
                    outFileStream = new FileStream(
                        outFilePath,
                        FileMode.CreateNew,
                        FileAccess.Write,
                        FileShare.None);

                    inputStream = zipEntry.Open();

                    inputStream.CopyTo(outFileStream);
                }
                finally
                {
                    outFileStream.SafeDispose();
                    inputStream.SafeDispose();
                }
            }
        }
        private static void Verify(string filePath, byte[] expectedHash, string hashName)
        {
            HashAlgorithm hashAlgorithm = null;
            Stream inputStream = null;
            try
            {
                hashAlgorithm = HashAlgorithm.Create(hashName);
                inputStream = new FileStream(
                    filePath,
                    FileMode.Open,
                    FileAccess.Read,
                    FileShare.None);

                var readBuffer = new byte[StreamReadBufferSize];
                int bytesRead;
                while ((bytesRead = inputStream.Read(readBuffer, 0, readBuffer.Length)) > 0)
                {
                    hashAlgorithm.TransformBlock(readBuffer, 0, bytesRead, readBuffer, 0);
                }
                hashAlgorithm.TransformFinalBlock(readBuffer, 0, 0);

                var isHashMatches = hashAlgorithm.Hash.SequenceEqual(expectedHash);
                if (!isHashMatches)
                {
                    var expectedHashString = GetHexString(expectedHash);
                    var actualHashString = GetHexString(hashAlgorithm.Hash);
                    throw new Exception(
                        $"Checksum for {filePath} does not match.  Expected: {expectedHashString}, Actual: {actualHashString}");
                }
            }
            finally
            {
                inputStream.SafeDispose();
                hashAlgorithm.SafeDispose();
            }
        }