void Write(IByteBufferAllocator allocator, FullBulkStringRedisMessage message, ICollection <object> output)
{
Contract.Requires(allocator != null);
Contract.Requires(message != null);
Contract.Requires(output != null);
IByteBuffer buffer = allocator.Buffer(
RedisConstants.TypeLength
+ (message.IsNull ? RedisConstants.NullLength : RedisConstants.LongValueMaximumLength)
+ RedisConstants.EndOfLineLength);
buffer.WriteByte((char)RedisMessageType.BulkString);
if (message.IsNull)
{
buffer.WriteShort(RedisConstants.Null);
buffer.WriteShort(RedisConstants.EndOfLine);
output.Add(buffer);
}
else
{
int readableBytes = message.Content.ReadableBytes;
byte[] bytes = this.NumberToBytes(readableBytes);
buffer.WriteBytes(bytes);
buffer.WriteShort(RedisConstants.EndOfLine);
output.Add(buffer);
output.Add(message.Content.Retain());
output.Add(allocator
.Buffer(RedisConstants.EndOfLineLength)
.WriteShort(RedisConstants.EndOfLine));
}
}
static void EncodeConnAckMessage(IByteBufferAllocator bufferAllocator, ConnAckPacket message, List <object> output)
{
IByteBuffer buffer = null;
try
{
buffer = bufferAllocator.Buffer(4);
buffer.WriteByte(CalculateFirstByteOfFixedHeader(message));
buffer.WriteByte(2); // remaining length
if (message.SessionPresent)
{
buffer.WriteByte(1); // 7 reserved 0-bits and SP = 1
}
else
{
buffer.WriteByte(0); // 7 reserved 0-bits and SP = 0
}
buffer.WriteByte((byte)message.ReturnCode);
output.Add(buffer);
buffer = null;
}
finally
{
buffer?.SafeRelease();
}
}
static void EncodeSubAckMessage(IByteBufferAllocator bufferAllocator, SubAckPacket message, List <object> output)
{
int payloadBufferSize = message.ReturnCodes.Count;
int variablePartSize = PacketIdLength + payloadBufferSize;
int fixedHeaderBufferSize = 1 + MaxVariableLength;
IByteBuffer buf = null;
try
{
buf = bufferAllocator.Buffer(fixedHeaderBufferSize + variablePartSize);
buf.WriteByte(CalculateFirstByteOfFixedHeader(message));
WriteVariableLengthInt(buf, variablePartSize);
buf.WriteShort(message.PacketId);
foreach (QualityOfService qos in message.ReturnCodes)
{
buf.WriteByte((byte)qos);
}
output.Add(buf);
buf = null;
}
finally
{
buf?.SafeRelease();
}
}
public MessageFrameBuilder(IByteBufferAllocator alloc, int opcode, FrameType type)
{
Alloc = alloc;
Buffer = alloc.Buffer();
OpCode = opcode;
Type = type;
}
public IByteBuffer ReadChunk(IByteBufferAllocator allocator)
{
if (this.IsEndOfInput)
{
return(null);
}
long availableBytes = this.input.Length - this.input.Position;
int readChunkSize = availableBytes <= 0L
? this.chunkSize
: (int)Math.Min(this.chunkSize, availableBytes);
bool release = true;
IByteBuffer buffer = allocator.Buffer(readChunkSize);
try
{
// transfer to buffer
int count = buffer.SetBytesAsync(buffer.WriterIndex, this.input, readChunkSize, CancellationToken.None).Result;
buffer.SetWriterIndex(buffer.WriterIndex + count);
this.offset += count;
release = false;
}
finally
{
if (release)
{
buffer.Release();
}
}
return(buffer);
}
public object Encode(IByteBufferAllocator allocator, object message)
{
var msg = message as RpcMessage;
var name = GetNameBytes(msg.Meta.GetType());
var meta = GetMsgJsonBytes(msg.Meta);
var metaLength = 1 + name.Length + meta.Length;
var bodyLength = msg.Body != null ? msg.Body.Length : 0;
var totalLength = HeaderLength + metaLength + bodyLength;
var buffer = allocator.Buffer(totalLength);
buffer.WriteIntLE(Magic);
buffer.WriteIntLE(metaLength);
buffer.WriteIntLE(bodyLength);
// 1字节NameLength + Name + M字节Meta
buffer.WriteByte(name.Length);
buffer.WriteBytes(name);
buffer.WriteBytes(meta);
if (msg.Body != null && msg.Body.Length > 0)
{
buffer.WriteBytes(msg.Body);
}
return(buffer);
}
static IByteBuffer EncodeString0(IByteBufferAllocator alloc, string src, Encoding encoding, int extraCapacity)
{
int length = encoding.GetMaxByteCount(src.Length) + extraCapacity;
bool release = true;
IByteBuffer dst = alloc.Buffer(length);
Contract.Assert(dst.HasArray, "Operation expects allocator to operate array-based buffers.");
try
{
int written = encoding.GetBytes(src, 0, src.Length, dst.Array, dst.ArrayOffset + dst.WriterIndex);
dst.SetWriterIndex(dst.WriterIndex + written);
release = false;
return(dst);
}
finally
{
if (release)
{
dst.Release();
}
}
}
public void Encrypt(IByteBufferAllocator allocator, EncryptMode mode, Stream src, Stream dst, bool reliable)
{
using (var data = new BufferWrapper(allocator.Buffer().WithOrder(ByteOrder.LittleEndian)))
using (var encryptor = GetAlgorithm(mode).CreateEncryptor())
using (var cs = new CryptoStream(new NonClosingStream(dst), encryptor, CryptoStreamMode.Write))
using (var w = cs.ToBinaryWriter(false))
{
var blockSize = AES.BlockSize / 8;
var padding = blockSize - (src.Length + 1 + 4) % blockSize;
if (reliable)
{
padding = blockSize - (src.Length + 1 + 4 + 2) % blockSize;
}
if (reliable)
{
var counter = (ushort)(Interlocked.Increment(ref _encryptCounter) - 1);
data.Buffer.WriteShort(counter);
}
using (var dataStream = new WriteOnlyByteBufferStream(data.Buffer, false))
src.CopyTo(dataStream);
w.Write((byte)padding);
using (var dataStream = new ReadOnlyByteBufferStream(data.Buffer, false))
{
w.Write(Hash.GetUInt32 <CRC32>(dataStream));
dataStream.Position = 0;
dataStream.CopyTo(cs);
}
w.Fill((int)padding);
}
}
void WriteArrayHeader(IByteBufferAllocator allocator, long?length, ICollection <object> output)
{
Contract.Requires(allocator != null);
Contract.Requires(output != null);
IByteBuffer buffer = allocator.Buffer(
RedisConstants.TypeLength
+ (!length.HasValue ? RedisConstants.NullLength : RedisConstants.LongValueMaximumLength)
+ RedisConstants.EndOfLineLength);
buffer.WriteByte((char)RedisMessageType.ArrayHeader);
if (!length.HasValue)
{
buffer.WriteShort(RedisConstants.Null);
}
else
{
byte[] bytes = this.NumberToBytes(length.Value);
buffer.WriteBytes(bytes);
}
buffer.WriteShort(RedisConstants.EndOfLine);
output.Add(buffer);
}
static void EncodePublishMessage(IByteBufferAllocator bufferAllocator, PublishPacket packet, List <object> output)
{
IByteBuffer payload = packet.Payload ?? Unpooled.Empty;
string topicName = packet.TopicName;
Util.ValidateTopicName(topicName);
byte[] topicNameBytes = EncodeStringInUtf8(topicName);
int variableHeaderBufferSize = StringSizeLength + topicNameBytes.Length +
(packet.QualityOfService > QualityOfService.AtMostOnce ? PacketIdLength : 0);
int payloadBufferSize = payload.ReadableBytes;
int variablePartSize = variableHeaderBufferSize + payloadBufferSize;
int fixedHeaderBufferSize = 1 + MaxVariableLength;
IByteBuffer buf = bufferAllocator.Buffer(fixedHeaderBufferSize + variablePartSize);
buf.WriteByte(CalculateFirstByteOfFixedHeader(packet));
WriteVariableLengthInt(buf, variablePartSize);
buf.WriteShort(topicNameBytes.Length);
buf.WriteBytes(topicNameBytes);
if (packet.QualityOfService > QualityOfService.AtMostOnce)
{
buf.WriteShort(packet.PacketId);
}
output.Add(buf);
if (payload.IsReadable())
{
output.Add(payload.Retain());
}
}
/// <summary>
/// Create a new object to contain the request data
/// </summary>
/// <param name="streamId">The stream associated with the request</param>
/// <param name="http2Headers">The initial set of HTTP/2 headers to create the request with</param>
/// <param name="alloc">The <see cref="IByteBufferAllocator"/> to use to generate the content of the message</param>
/// <param name="validateHttpHeaders"><c>true</c> to validate HTTP headers in the http-codec
/// <para><c>false</c> not to validate HTTP headers in the http-codec</para></param>
/// <returns>A new request object which represents headers/data</returns>
/// <exception cref="Http2Exception">see <see cref="AddHttp2ToHttpHeaders(int, IHttp2Headers, IFullHttpMessage, bool)"/></exception>
public static IFullHttpRequest ToFullHttpRequest(int streamId, IHttp2Headers http2Headers, IByteBufferAllocator alloc,
bool validateHttpHeaders)
{
// HTTP/2 does not define a way to carry the version identifier that is included in the HTTP/1.1 request line.
var method = http2Headers.Method;
if (method is null)
{
ThrowHelper.ThrowArgumentNullException_MethodHeader();
}
var path = http2Headers.Path;
if (path is null)
{
ThrowHelper.ThrowArgumentNullException_PathHeader();
}
var msg = new DefaultFullHttpRequest(DotNettyHttpVersion.Http11, HttpMethod.ValueOf(AsciiString.Of(method)),
path.ToString(), alloc.Buffer(), validateHttpHeaders);
try
{
AddHttp2ToHttpHeaders(streamId, http2Headers, msg, false);
}
catch (Http2Exception)
{
_ = msg.Release();
throw;
}
catch (Exception t)
{
_ = msg.Release();
ThrowHelper.ThrowStreamError_Http2ToHttp1HeadersConversionError(streamId, t);
}
return(msg);
}
internal static IByteBuffer EncodeString0(IByteBufferAllocator alloc, bool enforceHeap, string src, Encoding encoding, int extraCapacity)
{
int length = encoding.GetMaxByteCount(src.Length) + extraCapacity;
bool release = true;
IByteBuffer dst = enforceHeap ? alloc.HeapBuffer(length) : alloc.Buffer(length);
Debug.Assert(dst.HasArray, "Operation expects allocator to operate array-based buffers.");
try
{
#if NETCOREAPP || NETSTANDARD_2_0_GREATER
int written = encoding.GetBytes(src.AsSpan(), dst.FreeSpan);
#else
int written = encoding.GetBytes(src, 0, src.Length, dst.Array, dst.ArrayOffset + dst.WriterIndex);
#endif
dst.SetWriterIndex(dst.WriterIndex + written);
release = false;
return(dst);
}
finally
{
if (release)
{
dst.Release();
}
}
}
public static void DoEncode(IByteBufferAllocator bufferAllocator, Packet packet, List <object> output)
{
IByteBuffer buffer = bufferAllocator.Buffer();
try
{
// 1 byte PacketType
buffer.WriteByte((byte)packet.PacketType);
// 4 byte Sequence
buffer.WriteInt(packet.Sequence);
if (packet is PingPacket pingPacket)
{
buffer.WriteByte(pingPacket.PingCode);
}
else if (packet is PongPacket pongPacket)
{
buffer.WriteByte(pongPacket.PongCode);
}
else if (packet is MessageReqPacket messageReqPacket)
{
buffer.WriteShort(messageReqPacket.Code);
buffer.WriteInt(messageReqPacket.Body.Length);
buffer.WriteBytes(messageReqPacket.Body);
}
else if (packet is MessageRespPacket messageRespPacket)
{
buffer.WriteShort(messageRespPacket.Code);
buffer.WriteInt(messageRespPacket.Body.Length);
buffer.WriteBytes(messageRespPacket.Body);
}
else if (packet is PushReqPacket pushReqPacket)
{
buffer.WriteByte((byte)pushReqPacket.PushType);
buffer.WriteShort(pushReqPacket.Code);
buffer.WriteInt(pushReqPacket.Body.Length);
buffer.WriteBytes(pushReqPacket.Body);
}
else if (packet is PushRespPacket pushRespPacket)
{
buffer.WriteByte((byte)pushRespPacket.PushType);
buffer.WriteShort(pushRespPacket.Code);
buffer.WriteInt(pushRespPacket.Body.Length);
buffer.WriteBytes(pushRespPacket.Body);
}
else
{
throw new ArgumentException("Invalid packet!");
}
output.Add(buffer);
buffer = null;
}
finally
{
buffer?.SafeRelease();
}
}
public static IByteBuffer WriteAscii(IByteBufferAllocator alloc, string value)
{
// ASCII uses 1 byte per char
IByteBuffer buf = alloc.Buffer(value.Length);
_ = WriteAscii(buf, value);
return(buf);
}
public static IByteBuffer WriteAscii(IByteBufferAllocator alloc, ICharSequence seq)
{
// ASCII uses 1 byte per char
IByteBuffer buf = alloc.Buffer(seq.Count);
_ = WriteAscii(buf, seq);
return(buf);
}
static void WriteBulkStringContent(IByteBufferAllocator allocator, IBulkStringRedisContent msg, List <object> output)
{
output.Add(msg.Content.Retain());
if (msg is ILastBulkStringRedisContent)
{
output.Add(allocator.Buffer(RedisConstants.EndOfLineLength).WriteShort(RedisConstants.EndOfLineShort));
}
}
public static IByteBuffer WriteUtf8(IByteBufferAllocator alloc, string value)
{
// UTF-8 uses max. 3 bytes per char, so calculate the worst case.
IByteBuffer buf = alloc.Buffer(Utf8MaxBytes(value));
WriteUtf8(buf, value);
return(buf);
}
public static IByteBuffer WriteUtf8(IByteBufferAllocator alloc, ICharSequence seq)
{
// UTF-8 uses max. 3 bytes per char, so calculate the worst case.
IByteBuffer buf = alloc.Buffer(Utf8MaxBytes(seq));
WriteUtf8(buf, seq);
return(buf);
}
static void EncodePacketWithFixedHeaderOnly(IByteBufferAllocator bufferAllocator, Packet packet, List <object> output)
{
IByteBuffer buffer = bufferAllocator.Buffer(2);
buffer.WriteByte(CalculateFirstByteOfFixedHeader(packet));
buffer.WriteByte(0);
output.Add(buffer);
}
public static IByteBuffer WriteUtf8(IByteBufferAllocator alloc, ICharSequence seq)
{
// UTF-8 uses max. 3 bytes per char, so calculate the worst case.
var maxByteCount = Utf8MaxBytes(seq);
IByteBuffer buf = alloc.Buffer(maxByteCount);
_ = ReserveAndWriteUtf8(buf, seq, maxByteCount);
return(buf);
}
internal static IByteBuffer expandCumulation(IByteBufferAllocator alloc, IByteBuffer cumulation, int readable)
{
IByteBuffer oldCumulation = cumulation;
cumulation = alloc.Buffer(oldCumulation.ReadableBytes + readable);
cumulation.WriteBytes(oldCumulation);
oldCumulation.Release();
return(cumulation);
}
void WriteIntegerMessage(IByteBufferAllocator allocator, IntegerRedisMessage msg, List <object> output)
{
IByteBuffer buf = allocator.Buffer(RedisConstants.TypeLength + RedisConstants.LongMaxLength +
RedisConstants.EndOfLineLength);
RedisMessageType.Integer.WriteTo(buf);
buf.WriteBytes(this.NumberToBytes(msg.Value));
buf.WriteShort(RedisConstants.EndOfLineShort);
output.Add(buf);
}
static void WriteString(IByteBufferAllocator allocator, RedisMessageType type, string content, List <object> output)
{
IByteBuffer buf = allocator.Buffer(type.Length + ByteBufferUtil.Utf8MaxBytes(content) +
RedisConstants.EndOfLineLength);
type.WriteTo(buf);
ByteBufferUtil.WriteUtf8(buf, content);
buf.WriteShort(RedisConstants.EndOfLineShort);
output.Add(buf);
}
public IFullHttpMessage CopyIfNeeded(IByteBufferAllocator allocator, IFullHttpMessage msg)
{
if (msg is IFullHttpRequest request)
{
var copy = (IFullHttpRequest)request.Replace(allocator.Buffer(0));
_ = copy.Headers.Remove(HttpHeaderNames.Expect);
return(copy);
}
return(null);
}
/// <summary>
/// Adds a fragment to the block.
/// </summary>
/// <param name="fragment">the fragment of the headers block to be added.</param>
/// <param name="len"></param>
/// <param name="alloc">allocator for new blocks if needed.</param>
/// <param name="endOfHeaders">flag indicating whether the current frame is the end of the headers.
/// This is used for an optimization for when the first fragment is the full
/// block. In that case, the buffer is used directly without copying.</param>
internal void AddFragment(IByteBuffer fragment, int len, IByteBufferAllocator alloc, bool endOfHeaders)
{
if (_headerBlock is null)
{
if (len > _reader._headersDecoder.Configuration.MaxHeaderListSizeGoAway)
{
HeaderSizeExceeded();
}
if (endOfHeaders)
{
// Optimization - don't bother copying, just use the buffer as-is. Need
// to retain since we release when the header block is built.
_headerBlock = fragment.ReadRetainedSlice(len);
}
else
{
_headerBlock = alloc.Buffer(len).WriteBytes(fragment, len);
}
return;
}
if (_reader._headersDecoder.Configuration.MaxHeaderListSizeGoAway - len < _headerBlock.ReadableBytes)
{
HeaderSizeExceeded();
}
if (_headerBlock.IsWritable(len))
{
// The buffer can hold the requested bytes, just write it directly.
_ = _headerBlock.WriteBytes(fragment, len);
}
else
{
// Allocate a new buffer that is big enough to hold the entire header block so far.
IByteBuffer buf = alloc.Buffer(_headerBlock.ReadableBytes + len);
_ = buf.WriteBytes(_headerBlock).WriteBytes(fragment, len);
_ = _headerBlock.Release();
_headerBlock = buf;
}
}
static void EncodePublishMessage(IByteBufferAllocator bufferAllocator, PublishPacket packet, List <object> output)
{
//IByteBuffer payload = packet.Payload ?? Unpooled.Empty;
IByteBuffer payload;
if (packet.Payload == null)
{
payload = Unpooled.Empty;
}
else
{
payload = Unpooled.Buffer();
payload.WriteBytes(packet.Payload);
}
string topicName = packet.TopicName;
Util.ValidateTopicName(topicName);
byte[] topicNameBytes = EncodeStringInUtf8(topicName);
int variableHeaderBufferSize = StringSizeLength + topicNameBytes.Length +
(packet.Qos > MqttQos.AtMostOnce ? PacketIdLength : 0);
int payloadBufferSize = payload.ReadableBytes;
int variablePartSize = variableHeaderBufferSize + payloadBufferSize;
int fixedHeaderBufferSize = 1 + MaxVariableLength;
IByteBuffer buf = null;
try
{
buf = bufferAllocator.Buffer(fixedHeaderBufferSize + variablePartSize);
buf.WriteByte(CalculateFirstByteOfFixedHeader(packet));
WriteVariableLengthInt(buf, variablePartSize);
buf.WriteShort(topicNameBytes.Length);
buf.WriteBytes(topicNameBytes);
if (packet.Qos > MqttQos.AtMostOnce)
{
buf.WriteShort(packet.PacketId);
}
output.Add(buf);
buf = null;
}
finally
{
buf?.SafeRelease();
}
if (payload.IsReadable())
{
output.Add(payload.Retain());
}
}
void WriteArrayHeader(IByteBufferAllocator allocator, bool isNull, long length, List <object> output)
{
if (isNull)
{
IByteBuffer buf = allocator.Buffer(RedisConstants.TypeLength + RedisConstants.NullLength +
RedisConstants.EndOfLineLength);
RedisMessageType.ArrayHeader.WriteTo(buf);
buf.WriteShort(RedisConstants.NullShort);
buf.WriteShort(RedisConstants.EndOfLineShort);
output.Add(buf);
}
else
{
IByteBuffer buf = allocator.Buffer(RedisConstants.TypeLength + RedisConstants.LongMaxLength +
RedisConstants.EndOfLineLength);
RedisMessageType.ArrayHeader.WriteTo(buf);
buf.WriteBytes(this.NumberToBytes(length));
buf.WriteShort(RedisConstants.EndOfLineShort);
output.Add(buf);
}
}
public IByteBuffer Buffer(int initialCapacity, int maxCapacity)
{
// If the capacity values are negative then clamp them at zero.
initialCapacity = initialCapacity >= 0 ? initialCapacity : 0;
maxCapacity = maxCapacity >= 0 ? maxCapacity : 0;
Debug.Assert(initialCapacity >= 0);
Debug.Assert(maxCapacity >= 0);
if (initialCapacity == 0 && maxCapacity == 0)
{
return(DelegateAllocator.Buffer(0, 0)); // Will returned a reusable EmptyBuffer.
}
// If the capacity values, after adding padding, are too large then clamp them at int.MaxValue.
long maxCapLong = (long)maxCapacity + BufferFrontPadding;
long initCapLong = (long)initialCapacity + BufferFrontPadding;
var clampedMaxCapacity = maxCapLong > int.MaxValue ? int.MaxValue : (int)maxCapLong;
var clampedInitialCapacity = initCapLong > int.MaxValue ? int.MaxValue : (int)initCapLong;
Debug.Assert(clampedMaxCapacity >= 0 && clampedMaxCapacity <= int.MaxValue);
Debug.Assert(clampedInitialCapacity >= 0 && clampedInitialCapacity <= int.MaxValue);
// Allocate the buffer, and write the padding mask in the padding section
// so that it's easy to see it when debugging.
var buffer = DelegateAllocator.Buffer(clampedInitialCapacity, clampedMaxCapacity);
var writerIndex = buffer.WriterIndex;
var writerIndexAfterPadding = writerIndex + BufferFrontPadding;
buffer.SetInt(writerIndex, PaddingMask);
buffer.SetWriterIndex(writerIndexAfterPadding);
buffer.MarkWriterIndex();
buffer.SetReaderIndex(writerIndexAfterPadding);
buffer.MarkReaderIndex();
return(buffer);
}
public void BufferWithCapacity(bool preferDirect, int maxCapacity)
{
IByteBufferAllocator allocator = this.NewAllocator(preferDirect);
IByteBuffer buffer = allocator.Buffer(1, maxCapacity);
try
{
AssertBuffer(buffer, this.IsDirectExpected(preferDirect), 1, maxCapacity);
}
finally
{
buffer.Release();
}
}
public void BufferWithCapacity()
{
IByteBufferAllocator allocator = this.NewAllocator();
IByteBuffer buffer = allocator.Buffer(1, 8);
try
{
AssertBuffer(buffer, 1, 8);
}
finally
{
buffer.Release();
}
}
static IByteBuffer ExpandCumulation(IByteBufferAllocator allocator, IByteBuffer cumulation, int readable)
{
IByteBuffer oldCumulation = cumulation;
cumulation = allocator.Buffer(oldCumulation.ReadableBytes + readable);
cumulation.WriteBytes(oldCumulation);
oldCumulation.Release();
return cumulation;
}
public static async Task<PublishPacket> ComposePublishPacketAsync(IChannelHandlerContext context, IMessage message,
QualityOfService qos, string topicName, IByteBufferAllocator allocator)
{
bool duplicate = message.DeliveryCount > 0;
var packet = new PublishPacket(qos, duplicate, false);
packet.TopicName = topicName;
if (qos > QualityOfService.AtMostOnce)
{
int packetId = unchecked((int)message.SequenceNumber) & 0x3FFF; // clear bits #14 and #15
switch (qos)
{
case QualityOfService.AtLeastOnce:
break;
case QualityOfService.ExactlyOnce:
packetId |= 0x8000; // set bit #15
break;
default:
throw new ArgumentOutOfRangeException(nameof(qos), qos, null);
}
packet.PacketId = packetId + 1;
}
using (Stream payloadStream = message.Payload)
{
long streamLength = payloadStream.Length;
if (streamLength > int.MaxValue)
{
throw new InvalidOperationException($"Message size ({streamLength} bytes) is too big to process.");
}
int length = (int)streamLength;
IByteBuffer buffer = allocator.Buffer(length, length);
await buffer.WriteBytesAsync(payloadStream, length);
Contract.Assert(buffer.ReadableBytes == length);
packet.Payload = buffer;
}
return packet;
}
public IByteBuffer Allocate(IByteBufferAllocator alloc) => alloc.Buffer(this.bufferSize);
public IByteBuffer Allocate(IByteBufferAllocator alloc)
{
return alloc.Buffer(this.bufferSize);
}
static IByteBuffer EncodeString0(IByteBufferAllocator alloc, string src, Encoding encoding, int extraCapacity)
{
int length = encoding.GetMaxByteCount(src.Length) + extraCapacity;
bool release = true;
IByteBuffer dst = alloc.Buffer(length);
Contract.Assert(dst.HasArray, "Operation expects allocator to operate array-based buffers.");
try
{
int written = encoding.GetBytes(src, 0, src.Length, dst.Array, dst.ArrayOffset + dst.WriterIndex);
dst.SetWriterIndex(dst.WriterIndex + written);
release = false;
return dst;
}
finally
{
if (release)
{
dst.Release();
}
}
}
/// <summary>
/// Read the given amount of bytes into a new {@link ByteBuf} that is allocated from the {@link ByteBufAllocator}.
/// </summary>
public static IByteBuffer ReadBytes(IByteBufferAllocator alloc, IByteBuffer buffer, int length)
{
bool release = true;
IByteBuffer dst = alloc.Buffer(length);
try
{
buffer.ReadBytes(dst);
release = false;
return dst;
}
finally
{
if (release)
{
dst.Release();
}
}
}
