public void FragmentedFrame()
{
var encoderChannel = new EmbeddedChannel(
ZlibCodecFactory.NewZlibEncoder(ZlibWrapper.None, 9, 15, 8));
var decoderChannel = new EmbeddedChannel(new PerMessageDeflateDecoder(false));
// initialize
var payload = new byte[300];
_random.NextBytes(payload);
Assert.True(encoderChannel.WriteOutbound(Unpooled.WrappedBuffer(payload)));
var compressedPayload = encoderChannel.ReadOutbound <IByteBuffer>();
compressedPayload = compressedPayload.Slice(0, compressedPayload.ReadableBytes - 4);
int oneThird = compressedPayload.ReadableBytes / 3;
var compressedFrame1 = new BinaryWebSocketFrame(false,
WebSocketRsv.Rsv1 | WebSocketRsv.Rsv3,
compressedPayload.Slice(0, oneThird));
var compressedFrame2 = new ContinuationWebSocketFrame(false,
WebSocketRsv.Rsv3, compressedPayload.Slice(oneThird, oneThird));
var compressedFrame3 = new ContinuationWebSocketFrame(true,
WebSocketRsv.Rsv3, compressedPayload.Slice(oneThird * 2,
compressedPayload.ReadableBytes - oneThird * 2));
// execute
Assert.True(decoderChannel.WriteInbound(compressedFrame1.Retain()));
Assert.True(decoderChannel.WriteInbound(compressedFrame2.Retain()));
Assert.True(decoderChannel.WriteInbound(compressedFrame3));
var uncompressedFrame1 = decoderChannel.ReadInbound <BinaryWebSocketFrame>();
var uncompressedFrame2 = decoderChannel.ReadInbound <ContinuationWebSocketFrame>();
var uncompressedFrame3 = decoderChannel.ReadInbound <ContinuationWebSocketFrame>();
// test
Assert.NotNull(uncompressedFrame1);
Assert.NotNull(uncompressedFrame2);
Assert.NotNull(uncompressedFrame3);
Assert.Equal(WebSocketRsv.Rsv3, uncompressedFrame1.Rsv);
Assert.Equal(WebSocketRsv.Rsv3, uncompressedFrame2.Rsv);
Assert.Equal(WebSocketRsv.Rsv3, uncompressedFrame3.Rsv);
IByteBuffer finalPayloadWrapped = Unpooled.WrappedBuffer(uncompressedFrame1.Content,
uncompressedFrame2.Content, uncompressedFrame3.Content);
Assert.Equal(300, finalPayloadWrapped.ReadableBytes);
var finalPayload = new byte[300];
finalPayloadWrapped.ReadBytes(finalPayload);
Assert.Equal(payload, finalPayload);
finalPayloadWrapped.Release();
}
public void FragmentedFrameWithLeftOverInLastFragment()
{
string hexDump = "677170647a777a737574656b707a787a6f6a7561756578756f6b7868616371716c657a6d64697479766d726f6" +
"269746c6376777464776f6f72767a726f64667278676764687775786f6762766d776d706b76697773777a7072" +
"6a6a737279707a7078697a6c69616d7461656d646278626d786f66666e686e776a7a7461746d7a776668776b6" +
"f6f736e73746575637a6d727a7175707a6e74627578687871767771697a71766c64626d78726d6d7675756877" +
"62667963626b687a726d676e646263776e67797264706d6c6863626577616967706a78636a72697464756e627" +
"977616f79736475676f76736f7178746a7a7479626c64636b6b6778637768746c62";
EmbeddedChannel encoderChannel = new EmbeddedChannel(
ZlibCodecFactory.NewZlibEncoder(ZlibWrapper.None, 9, 15, 8));
EmbeddedChannel decoderChannel = new EmbeddedChannel(new PerMessageDeflateDecoder(false));
IByteBuffer originPayload = Unpooled.WrappedBuffer(StringUtil.DecodeHexDump(hexDump));
Assert.True(encoderChannel.WriteOutbound(originPayload.Duplicate().Retain()));
var compressedPayload = encoderChannel.ReadOutbound <IByteBuffer>();
compressedPayload = compressedPayload.Slice(0, compressedPayload.ReadableBytes - 4);
int oneThird = compressedPayload.ReadableBytes / 3;
TextWebSocketFrame compressedFrame1 = new TextWebSocketFrame(
false, WebSocketRsv.Rsv1, compressedPayload.Slice(0, oneThird));
ContinuationWebSocketFrame compressedFrame2 = new ContinuationWebSocketFrame(
false, WebSocketRsv.Rsv3, compressedPayload.Slice(oneThird, oneThird));
ContinuationWebSocketFrame compressedFrame3 = new ContinuationWebSocketFrame(
false, WebSocketRsv.Rsv3, compressedPayload.Slice(oneThird * 2, oneThird));
int offset = oneThird * 3;
ContinuationWebSocketFrame compressedFrameWithExtraData = new ContinuationWebSocketFrame(
true, WebSocketRsv.Rsv3, compressedPayload.Slice(offset,
compressedPayload.ReadableBytes - offset));
// check that last fragment contains only one extra byte
Assert.Equal(1, compressedFrameWithExtraData.Content.ReadableBytes);
Assert.Equal(1, compressedFrameWithExtraData.Content.GetByte(0));
// write compressed frames
Assert.True(decoderChannel.WriteInbound(compressedFrame1.Retain()));
Assert.True(decoderChannel.WriteInbound(compressedFrame2.Retain()));
Assert.True(decoderChannel.WriteInbound(compressedFrame3.Retain()));
Assert.True(decoderChannel.WriteInbound(compressedFrameWithExtraData));
// read uncompressed frames
TextWebSocketFrame uncompressedFrame1 = decoderChannel.ReadInbound <TextWebSocketFrame>();
ContinuationWebSocketFrame uncompressedFrame2 = decoderChannel.ReadInbound <ContinuationWebSocketFrame>();
ContinuationWebSocketFrame uncompressedFrame3 = decoderChannel.ReadInbound <ContinuationWebSocketFrame>();
ContinuationWebSocketFrame uncompressedExtraData = decoderChannel.ReadInbound <ContinuationWebSocketFrame>();
Assert.False(uncompressedExtraData.Content.IsReadable());
var uncompressedPayload = Unpooled.WrappedBuffer(uncompressedFrame1.Content, uncompressedFrame2.Content,
uncompressedFrame3.Content, uncompressedExtraData.Content);
Assert.Equal(originPayload, uncompressedPayload);
Assert.True(originPayload.Release());
Assert.True(uncompressedPayload.Release());
Assert.True(encoderChannel.FinishAndReleaseAll());
Assert.False(decoderChannel.Finish());
}
