public DecompressedData Decompress(byte[] data, int offset, int count, bool forceDecompress = false, bool dataCanBeLarger = false)
{
if (decompressorInputStream == null)
{
decompressorInputStream = new BufferPoolMemoryStream(count);
}
if (data != null)
{
decompressorInputStream.Write(data, offset, count);
}
if (!forceDecompress && decompressorInputStream.Length < MinLengthToDecompress)
{
return(new DecompressedData(null, 0));
}
decompressorInputStream.Position = 0;
if (decompressorGZipStream == null)
{
decompressorGZipStream = new Zlib.GZipStream(decompressorInputStream,
Zlib.CompressionMode.Decompress,
Zlib.CompressionLevel.Default,
true);
decompressorGZipStream.FlushMode = Zlib.FlushType.Sync;
}
if (decompressorOutputStream == null)
{
decompressorOutputStream = new BufferPoolMemoryStream();
}
decompressorOutputStream.SetLength(0);
byte[] copyBuffer = BufferPool.Get(1024, true);
int readCount;
int sumReadCount = 0;
while ((readCount = decompressorGZipStream.Read(copyBuffer, 0, copyBuffer.Length)) != 0)
{
decompressorOutputStream.Write(copyBuffer, 0, readCount);
sumReadCount += readCount;
}
BufferPool.Release(copyBuffer);
// If no read is done (returned with any data) don't zero out the input stream, as it would delete any not yet used data.
if (sumReadCount > 0)
{
decompressorGZipStream.SetLength(0);
}
byte[] result = decompressorOutputStream.ToArray(dataCanBeLarger);
return(new DecompressedData(result, dataCanBeLarger ? (int)decompressorOutputStream.Length : result.Length));
}
protected byte[] DecodeStream(BufferPoolMemoryStream streamToDecode)
{
streamToDecode.Seek(0, SeekOrigin.Begin);
// The cache stores the decoded data
var encoding =
#if !BESTHTTP_DISABLE_CACHING
IsFromCache ? null :
#endif
GetHeaderValues("content-encoding");
#if !UNITY_WEBGL || UNITY_EDITOR
Stream decoderStream = null;
#endif
// Return early if there are no encoding used.
if (encoding == null)
{
return(streamToDecode.ToArray());
}
else
{
switch (encoding[0])
{
#if !UNITY_WEBGL || UNITY_EDITOR
case "gzip": decoderStream = new Decompression.Zlib.GZipStream(streamToDecode, Decompression.Zlib.CompressionMode.Decompress); break;
case "deflate": decoderStream = new Decompression.Zlib.DeflateStream(streamToDecode, Decompression.Zlib.CompressionMode.Decompress); break;
#endif
//identity, utf-8, etc.
default:
// Do not copy from one stream to an other, just return with the raw bytes
return(streamToDecode.ToArray());
}
}
#if !UNITY_WEBGL || UNITY_EDITOR
using (var ms = new BufferPoolMemoryStream((int)streamToDecode.Length))
{
var buf = BufferPool.Get(1024, true);
int byteCount = 0;
while ((byteCount = decoderStream.Read(buf, 0, buf.Length)) > 0)
{
ms.Write(buf, 0, byteCount);
}
BufferPool.Release(buf);
decoderStream.Dispose();
return(ms.ToArray());
}
#endif
}
private byte[] Decompress(byte[] data, int offset, int count)
{
if (decompressorInputStream == null)
{
decompressorInputStream = new MemoryStream(count);
}
decompressorInputStream.Write(data, offset, count);
// http://tools.ietf.org/html/rfc7692#section-7.2.2
// Append 4 octets of 0x00 0x00 0xff 0xff to the tail end of the payload of the message.
//decompressorInputStream.Write(PerMessageCompression.Trailer, 0, PerMessageCompression.Trailer.Length);
decompressorInputStream.Position = 0;
if (decompressorGZipStream == null)
{
decompressorGZipStream = new Decompression.Zlib.GZipStream(decompressorInputStream,
Decompression.Zlib.CompressionMode.Decompress,
Decompression.Zlib.CompressionLevel.Default,
true);
decompressorGZipStream.FlushMode = Decompression.Zlib.FlushType.Sync;
}
if (decompressorOutputStream == null)
{
decompressorOutputStream = new System.IO.MemoryStream();
}
decompressorOutputStream.SetLength(0);
if (copyBuffer == null)
{
copyBuffer = new byte[1024];
}
int readCount;
while ((readCount = decompressorGZipStream.Read(copyBuffer, 0, copyBuffer.Length)) != 0)
{
decompressorOutputStream.Write(copyBuffer, 0, readCount);
}
decompressorGZipStream.SetLength(0);
byte[] result = decompressorOutputStream.ToArray();
/*if (this.ServerNoContextTakeover)
* {
* decompressorDeflateStream.Dispose();
* decompressorDeflateStream = null;
* }*/
return(result);
}
private byte[] Decompress(byte[] data, int offset, int count, bool forceDecompress = false)
{
if (decompressorInputStream == null)
{
decompressorInputStream = new MemoryStream(count);
}
if (data != null)
{
decompressorInputStream.Write(data, offset, count);
}
if (!forceDecompress && decompressorInputStream.Length < MinLengthToDecompress)
{
return(null);
}
decompressorInputStream.Position = 0;
if (decompressorGZipStream == null)
{
decompressorGZipStream = new Decompression.Zlib.GZipStream(decompressorInputStream,
Decompression.Zlib.CompressionMode.Decompress,
Decompression.Zlib.CompressionLevel.Default,
true);
decompressorGZipStream.FlushMode = Decompression.Zlib.FlushType.Sync;
}
if (decompressorOutputStream == null)
{
decompressorOutputStream = new System.IO.MemoryStream();
}
decompressorOutputStream.SetLength(0);
if (copyBuffer == null)
{
copyBuffer = new byte[1024];
}
int readCount;
while ((readCount = decompressorGZipStream.Read(copyBuffer, 0, copyBuffer.Length)) != 0)
{
decompressorOutputStream.Write(copyBuffer, 0, readCount);
}
decompressorGZipStream.SetLength(0);
byte[] result = decompressorOutputStream.ToArray();
return(result);
}
private byte[] Decompress(byte[] data, int offset, int count, bool forceDecompress = false)
{
if (decompressorInputStream == null)
{
decompressorInputStream = new BufferPoolMemoryStream(count);
}
if (data != null)
{
decompressorInputStream.Write(data, offset, count);
}
if (!forceDecompress && decompressorInputStream.Length < MinLengthToDecompress)
{
return(null);
}
decompressorInputStream.Position = 0;
if (decompressorGZipStream == null)
{
decompressorGZipStream = new Decompression.Zlib.GZipStream(decompressorInputStream,
Decompression.Zlib.CompressionMode.Decompress,
Decompression.Zlib.CompressionLevel.Default,
true);
decompressorGZipStream.FlushMode = Decompression.Zlib.FlushType.Sync;
}
if (decompressorOutputStream == null)
{
decompressorOutputStream = new BufferPoolMemoryStream();
}
decompressorOutputStream.SetLength(0);
byte[] copyBuffer = VariableSizedBufferPool.Get(1024, true);
int readCount;
while ((readCount = decompressorGZipStream.Read(copyBuffer, 0, copyBuffer.Length)) != 0)
{
decompressorOutputStream.Write(copyBuffer, 0, readCount);
}
VariableSizedBufferPool.Release(copyBuffer);
decompressorGZipStream.SetLength(0);
// TODO: be able to use a larger array
byte[] result = decompressorOutputStream.ToArray();
return(result);
}
protected byte[] DecodeStream(Stream streamToDecode)
{
streamToDecode.Seek(0, SeekOrigin.Begin);
// The cache stores the decoded data
var encoding =
#if !BESTHTTP_DISABLE_CACHING && (!UNITY_WEBGL || UNITY_EDITOR)
IsFromCache ? null :
#endif
GetHeaderValues("content-encoding");
Stream decoderStream = null;
if (encoding == null)
{
decoderStream = streamToDecode;
}
else
{
switch (encoding[0])
{
#if !UNITY_WEBGL || UNITY_EDITOR
case "gzip": decoderStream = new Decompression.Zlib.GZipStream(streamToDecode, Decompression.Zlib.CompressionMode.Decompress); break;
case "deflate": decoderStream = new Decompression.Zlib.DeflateStream(streamToDecode, Decompression.Zlib.CompressionMode.Decompress); break;
#endif
default:
//identity, utf-8, etc.
decoderStream = streamToDecode;
break;
}
}
using (var ms = new MemoryStream((int)streamToDecode.Length))
{
var buf = new byte[1024];
int byteCount = 0;
while ((byteCount = decoderStream.Read(buf, 0, buf.Length)) > 0)
{
ms.Write(buf, 0, byteCount);
}
return(ms.ToArray());
}
}
private void CloseDecompressors()
{
if (decompressorGZipStream != null)
{
decompressorGZipStream.Dispose();
}
decompressorGZipStream = null;
if (decompressorInputStream != null)
{
decompressorInputStream.Dispose();
}
decompressorInputStream = null;
if (decompressorOutputStream != null)
{
decompressorOutputStream.Dispose();
}
decompressorOutputStream = null;
}
/// <summary>
/// Uncompress a GZip'ed byte array into a single string.
/// </summary>
///
/// <seealso cref="GZipStream.CompressString(String)"/>
/// <seealso cref="GZipStream.UncompressBuffer(byte[])"/>
///
/// <param name="compressed">
/// A buffer containing GZIP-compressed data.
/// </param>
///
/// <returns>The uncompressed string</returns>
public static String UncompressString(byte[] compressed)
{
using (var input = new MemoryStream(compressed))
{
Stream decompressor = new GZipStream(input, CompressionMode.Decompress);
return ZlibBaseStream.UncompressString(compressed, decompressor);
}
}
/// <summary>
/// Compress a byte array into a new byte array using GZip.
/// </summary>
///
/// <remarks>
/// Uncompress it with <see cref="GZipStream.UncompressBuffer(byte[])"/>.
/// </remarks>
///
/// <seealso cref="GZipStream.CompressString(string)"/>
/// <seealso cref="GZipStream.UncompressBuffer(byte[])"/>
///
/// <param name="b">
/// A buffer to compress.
/// </param>
///
/// <returns>The data in compressed form</returns>
public static byte[] CompressBuffer(byte[] b)
{
using (var ms = new MemoryStream())
{
System.IO.Stream compressor =
new GZipStream( ms, CompressionMode.Compress, CompressionLevel.BestCompression );
ZlibBaseStream.CompressBuffer(b, compressor);
return ms.ToArray();
}
}
/// <summary>
/// Uncompress a GZip'ed byte array into a byte array.
/// </summary>
///
/// <seealso cref="GZipStream.CompressBuffer(byte[])"/>
/// <seealso cref="GZipStream.UncompressString(byte[])"/>
///
/// <param name="compressed">
/// A buffer containing data that has been compressed with GZip.
/// </param>
///
/// <returns>The data in uncompressed form</returns>
public static byte[] UncompressBuffer(byte[] compressed)
{
using (var input = new System.IO.MemoryStream(compressed))
{
System.IO.Stream decompressor =
new GZipStream( input, CompressionMode.Decompress );
return ZlibBaseStream.UncompressBuffer(compressed, decompressor);
}
}
protected byte[] DecodeStream(Stream streamToDecode)
{
streamToDecode.Seek(0, SeekOrigin.Begin);
// The cache stores the decoded data
var encoding = IsFromCache ? null : GetHeaderValues("content-encoding");
Stream decoderStream = null;
if (encoding == null)
decoderStream = streamToDecode;
else
{
switch (encoding[0])
{
case "gzip": decoderStream = new Decompression.Zlib.GZipStream(streamToDecode, Decompression.Zlib.CompressionMode.Decompress); break;
case "deflate": decoderStream = new Decompression.Zlib.DeflateStream(streamToDecode, Decompression.Zlib.CompressionMode.Decompress); break;
default:
//identity, utf-8, etc.
decoderStream = streamToDecode;
break;
}
}
using (var ms = new MemoryStream((int)streamToDecode.Length))
{
var buf = new byte[1024];
int byteCount = 0;
while ((byteCount = decoderStream.Read(buf, 0, buf.Length)) > 0)
ms.Write(buf, 0, byteCount);
return ms.ToArray();
}
}
