public static void CreateFrames()
{
// Set up the non-empty layer data we'll use.
Bond.IBonded goodLayerObject = new Bond.Bonded<Dummy>(dummyObject);
var outputBuffer = new OutputBuffer();
var compactWriter = new CompactBinaryWriter<OutputBuffer>(outputBuffer);
compactWriter.WriteVersion();
goodLayerObject.Serialize(compactWriter);
goodLayerData = outputBuffer.Data;
// Good frames, from which we can pull good framelets to build bad frames.
goodRequestFrame = EpoxyConnection.MessageToFrame(
GoodRequestId, GoodService, GoodMethod, EpoxyMessageType.REQUEST, meaninglessPayload, null, LoggerTests.BlackHole);
goodRequestLayerDataFrame = EpoxyConnection.MessageToFrame(
GoodRequestId, GoodService, GoodMethod, EpoxyMessageType.REQUEST, meaninglessPayload, goodLayerObject, LoggerTests.BlackHole);
goodResponseFrame = EpoxyConnection.MessageToFrame(
GoodResponseId, GoodService, GoodMethod, EpoxyMessageType.RESPONSE, meaninglessPayload, null, LoggerTests.BlackHole);
goodErrorResponseFrame = EpoxyConnection.MessageToFrame(
GoodResponseId, GoodService, GoodMethod, EpoxyMessageType.RESPONSE, meaninglessError, null, LoggerTests.BlackHole);
goodEventFrame = EpoxyConnection.MessageToFrame(
GoodRequestId, GoodService, GoodMethod, EpoxyMessageType.EVENT, meaninglessPayload, null, LoggerTests.BlackHole);
configFrame = EpoxyConnection.MakeConfigFrame(LoggerTests.BlackHole);
protocolErrorFrame = EpoxyConnection.MakeProtocolErrorFrame(MeaninglessErrorCode, null, LoggerTests.BlackHole);
var goodFrameletCount = goodRequestFrame.Count;
// Bad frames made of good framelets.
shortRequestFrame = new Frame(goodFrameletCount - 1, LoggerTests.BlackHole);
for (var i = 0; i < goodFrameletCount - 1; i++)
{
shortRequestFrame.Add(goodRequestFrame.Framelets[i]);
}
doubleHeadersRequestFrame = new Frame(goodFrameletCount + 1, LoggerTests.BlackHole);
doubleHeadersRequestFrame.Add(goodRequestFrame.Framelets[0]);
for (var i = 0; i < goodFrameletCount; i++)
{
doubleHeadersRequestFrame.Add(goodRequestFrame.Framelets[i]);
}
headersConfigRequestFrame = new Frame(2, LoggerTests.BlackHole);
headersConfigRequestFrame.Add(goodRequestFrame.Framelets[0]);
headersConfigRequestFrame.Add(configFrame.Framelets[0]);
doublePayloadRequestFrame = new Frame(goodFrameletCount + 1, LoggerTests.BlackHole);
for (var i = 0; i < goodFrameletCount; i++)
{
doublePayloadRequestFrame.Add(goodRequestFrame.Framelets[i]);
}
doublePayloadRequestFrame.Add(goodRequestFrame.Framelets[goodFrameletCount - 1]);
backwardsRequestFrame = new Frame(goodFrameletCount, LoggerTests.BlackHole);
foreach (var framelet in goodRequestFrame.Framelets.Reverse())
{
backwardsRequestFrame.Add(framelet);
}
doubleProtocolErrorFrame = EpoxyConnection.MakeProtocolErrorFrame(MeaninglessErrorCode, null, LoggerTests.BlackHole);
doubleProtocolErrorFrame.Add(doubleProtocolErrorFrame.Framelets[0]);
configFrameExtra = EpoxyConnection.MakeConfigFrame(LoggerTests.BlackHole);
configFrameExtra.Add(goodRequestFrame.Framelets[0]);
// Bad frames made of bad framelets.
var invalidConfigData = new ArraySegment<byte>(new byte[] { 0x01 });
configFrameBadConfigData = new Frame(1, LoggerTests.BlackHole);
configFrameBadConfigData.Add(new Framelet(FrameletType.EpoxyConfig, invalidConfigData));
}
public void Frame_Add_FrameletsCanBeRetreived()
{
var AnyOtherContents = new ArraySegment<byte>(new[] {(byte)0x00});
var expectedFramelets = new[]
{
new Framelet(FrameletType.EpoxyConfig, AnyContents),
new Framelet(FrameletType.EpoxyConfig, AnyOtherContents),
new Framelet(FrameletType.LayerData, AnyContents),
new Framelet(FrameletType.EpoxyConfig, AnyContents),
};
var frame = new Frame(4, LoggerTests.BlackHole);
frame.Add(new Framelet(FrameletType.EpoxyConfig, AnyContents));
frame.Add(new Framelet(FrameletType.EpoxyConfig, AnyOtherContents));
frame.Add(new Framelet(FrameletType.LayerData, AnyContents));
frame.Add(new Framelet(FrameletType.EpoxyConfig, AnyContents));
Assert.AreEqual(4, frame.Count);
Assert.AreEqual(frame.Framelets.Count, frame.Count);
CollectionAssert.AreEqual(expectedFramelets, frame.Framelets);
}
public static async Task<Frame> ReadAsync(Stream stream, CancellationToken ct, Logger logger)
{
try
{
var frameletCount = await ReadUInt16Async(stream, ct);
if (frameletCount == 0)
{
throw new EpoxyProtocolErrorException("Zero framelets");
}
var frame = new Frame(frameletCount, logger);
while (frameletCount > 0)
{
if (ct.IsCancellationRequested)
{
return null;
}
var frameletType = await ReadUInt16Async(stream, ct);
if (!Framelet.IsKnownType(frameletType))
{
throw new EpoxyProtocolErrorException("Unknown framelet type: " + frameletType);
}
var frameletLength = await ReadUInt32Async(stream, ct);
if (frameletLength > int.MaxValue)
{
throw new EpoxyProtocolErrorException("Framelet too big: " + frameletLength);
}
byte[] frameletContents = await ReadBufferAsync(stream, unchecked((int)frameletLength), ct);
frame.Add(new Framelet((FrameletType)frameletType, new ArraySegment<byte>(frameletContents)));
--frameletCount;
}
return frame;
}
catch (Exception ex) when (ex is OperationCanceledException || ex is EndOfStreamException || ex is ObjectDisposedException)
{
return null;
}
}
public async Task Frame_RoundTrip_Works()
{
var expectedFramelets = new[]
{
new Framelet(FrameletType.EpoxyConfig, AnyContents),
new Framelet(FrameletType.LayerData, AnyContents),
new Framelet(FrameletType.EpoxyConfig, AnyContents),
};
var frame = new Frame(LoggerTests.BlackHole);
foreach (var framelet in expectedFramelets)
{
frame.Add(framelet);
}
var memStream = new MemoryStream();
await frame.WriteAsync(memStream);
memStream.Seek(0, SeekOrigin.Begin);
var resultFrame = await Frame.ReadAsync(memStream, CancellationToken.None, LoggerTests.BlackHole);
CollectionAssert.AreEqual(expectedFramelets, resultFrame.Framelets, DeepFrameletComparer.Instance);
}
public async Task Frame_WriteAsync_OneFramelet_ContentsExpected()
{
var frame = new Frame(LoggerTests.BlackHole);
frame.Add(new Framelet(FrameletType.EpoxyConfig, AnyContents));
var memStream = new MemoryStream();
await frame.WriteAsync(memStream);
var expectedBytes = new[]
{
0x01, 0x00, // frame count
0x43, 0x47, // EpoxyConfig framelet type
0x04, 0x00, 0x00, 0x00, // framelet length
0x62, 0x6F, 0x6E, 0x64 // AnyContents bytes
};
CollectionAssert.AreEqual(expectedBytes, memStream.ToArray());
}
public void Frame_Add_AddMoreThanInt32TotalSize_Throws()
{
var largeContents = new ArraySegment<byte>(new byte[2 * 65535]);
int numFramesToAdd = Int32.MaxValue/largeContents.Count;
var frame = new Frame(numFramesToAdd, LoggerTests.BlackHole);
for (int i = 0; i < numFramesToAdd - 1; ++i)
{
frame.Add(new Framelet(FrameletType.LayerData, largeContents));
}
Assert.That(
() => frame.Add(new Framelet(FrameletType.LayerData, largeContents)),
Throws.InvalidOperationException.With.Message.ContainsSubstring("Exceeded maximum size of frame"));
}
public void Frame_Add_AddMoreThanUInt16Framelets_Throws()
{
var frame = new Frame((int)UInt16.MaxValue + 1, LoggerTests.BlackHole);
for (int i = 0; i < UInt16.MaxValue; ++i)
{
frame.Add(new Framelet(FrameletType.LayerData, AnyContents));
}
Assert.That(
() => frame.Add(new Framelet(FrameletType.PayloadData, AnyContents)),
Throws.InvalidOperationException.With.Message.ContainsSubstring("Exceeded maximum allowed count of framelets"));
}
public void Frame_Add_TotalCount_Updated()
{
var frame = new Frame(2, LoggerTests.BlackHole);
int expectedSize = 2;
Assert.AreEqual(expectedSize, frame.TotalSize);
frame.Add(new Framelet(FrameletType.LayerData, AnyContents));
expectedSize += 2 + 4 + AnyContents.Count;
Assert.AreEqual(expectedSize, frame.TotalSize);
frame.Add(new Framelet(FrameletType.ProtocolError, AnyContents));
expectedSize += 2 + 4 + AnyContents.Count;
Assert.AreEqual(expectedSize, frame.TotalSize);
}