| | | 1 | | // Licensed to the .NET Foundation under one or more agreements. |
| | | 2 | | // The .NET Foundation licenses this file to you under the MIT license. |
| | | 3 | | |
| | | 4 | | using System; |
| | | 5 | | using System.IO; |
| | | 6 | | using System.IO.Compression; |
| | | 7 | | |
| | | 8 | | namespace CoreWCF.Channels |
| | | 9 | | { |
| | | 10 | | internal static class MessageEncoderCompressionHandler |
| | | 11 | | { |
| | | 12 | | internal const string GZipContentEncoding = "gzip"; |
| | | 13 | | internal const string DeflateContentEncoding = "deflate"; |
| | | 14 | | private const int DecompressBlockSize = 1024; |
| | | 15 | | |
| | | 16 | | internal static void DecompressBuffer(ref ArraySegment<byte> buffer, BufferManager bufferManager, CompressionFor |
| | | 17 | | { |
| | 6 | 18 | | MemoryStream memoryStream = new MemoryStream(buffer.Array, buffer.Offset, buffer.Count); |
| | 6 | 19 | | int maxDecompressedSize = (int)Math.Min(maxReceivedMessageSize, int.MaxValue); |
| | | 20 | | |
| | 6 | 21 | | using (BufferManagerOutputStream bufferedOutStream = new BufferManagerOutputStream(SRCommon.MaxReceivedMessa |
| | | 22 | | { |
| | 6 | 23 | | bufferedOutStream.Write(buffer.Array, 0, buffer.Offset); |
| | | 24 | | |
| | 6 | 25 | | byte[] tempBuffer = bufferManager.TakeBuffer(DecompressBlockSize); |
| | | 26 | | try |
| | | 27 | | { |
| | 6 | 28 | | using (Stream ds = compressionFormat == CompressionFormat.GZip ? |
| | 6 | 29 | | (Stream)new GZipStream(memoryStream, CompressionMode.Decompress) : |
| | 6 | 30 | | (Stream)new DeflateStream(memoryStream, CompressionMode.Decompress)) |
| | | 31 | | { |
| | | 32 | | while (true) |
| | | 33 | | { |
| | 46 | 34 | | int bytesRead = ds.Read(tempBuffer, 0, DecompressBlockSize); |
| | 46 | 35 | | if (bytesRead > 0) |
| | | 36 | | { |
| | 40 | 37 | | bufferedOutStream.Write(tempBuffer, 0, bytesRead); |
| | | 38 | | } |
| | | 39 | | else |
| | | 40 | | { |
| | | 41 | | break; |
| | | 42 | | } |
| | | 43 | | } |
| | 6 | 44 | | } |
| | | 45 | | } |
| | | 46 | | finally |
| | | 47 | | { |
| | 6 | 48 | | bufferManager.ReturnBuffer(tempBuffer); |
| | 6 | 49 | | } |
| | | 50 | | |
| | 6 | 51 | | byte[] decompressedBytes = bufferedOutStream.ToArray(out int length); |
| | 6 | 52 | | bufferManager.ReturnBuffer(buffer.Array); |
| | 6 | 53 | | buffer = new ArraySegment<byte>(decompressedBytes, buffer.Offset, length - buffer.Offset); |
| | 6 | 54 | | } |
| | 6 | 55 | | } |
| | | 56 | | |
| | | 57 | | internal static void CompressBuffer(ref ArraySegment<byte> buffer, BufferManager bufferManager, CompressionForma |
| | | 58 | | { |
| | 10 | 59 | | using (BufferManagerOutputStream bufferedOutStream = new BufferManagerOutputStream(SRCommon.MaxSentMessageSi |
| | | 60 | | { |
| | 10 | 61 | | bufferedOutStream.Write(buffer.Array, 0, buffer.Offset); |
| | | 62 | | |
| | 10 | 63 | | using (Stream ds = compressionFormat == CompressionFormat.GZip ? |
| | 10 | 64 | | (Stream)new GZipStream(bufferedOutStream, CompressionMode.Compress, true) : |
| | 10 | 65 | | (Stream)new DeflateStream(bufferedOutStream, CompressionMode.Compress, true)) |
| | | 66 | | { |
| | 10 | 67 | | ds.Write(buffer.Array, buffer.Offset, buffer.Count); |
| | 10 | 68 | | } |
| | | 69 | | |
| | 10 | 70 | | byte[] compressedBytes = bufferedOutStream.ToArray(out int length); |
| | 10 | 71 | | bufferManager.ReturnBuffer(buffer.Array); |
| | 10 | 72 | | buffer = new ArraySegment<byte>(compressedBytes, buffer.Offset, length - buffer.Offset); |
| | 10 | 73 | | } |
| | 10 | 74 | | } |
| | | 75 | | |
| | | 76 | | internal static Stream GetDecompressStream(Stream compressedStream, CompressionFormat compressionFormat) |
| | | 77 | | { |
| | 12 | 78 | | return compressionFormat == CompressionFormat.GZip ? |
| | 12 | 79 | | (Stream)new GZipStream(compressedStream, CompressionMode.Decompress, false) : |
| | 12 | 80 | | (Stream)new DeflateStream(compressedStream, CompressionMode.Decompress, false); |
| | | 81 | | } |
| | | 82 | | |
| | | 83 | | internal static Stream GetCompressStream(Stream uncompressedStream, CompressionFormat compressionFormat) |
| | | 84 | | { |
| | 8 | 85 | | return compressionFormat == CompressionFormat.GZip ? |
| | 8 | 86 | | (Stream)new GZipStream(uncompressedStream, CompressionMode.Compress, true) : |
| | 8 | 87 | | (Stream)new DeflateStream(uncompressedStream, CompressionMode.Compress, true); |
| | | 88 | | } |
| | | 89 | | } |
| | | 90 | | } |