public async Task TrailersShouldBeCorrectlySent(bool isServer)
{
var inPipe = new BufferedPipe(1024);
var outPipe = new BufferedPipe(1024);
var r = await StreamCreator.CreateConnectionAndStream(
isServer, loggerProvider, inPipe, outPipe);
await r.stream.WriteAsync(new ArraySegment <byte>(new byte[0]));
await outPipe.ReadAndDiscardData(1u, false, 0);
// Send trailers
await r.stream.WriteTrailersAsync(DefaultTrailingHeaders);
// Check the received trailers
var fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(FrameType.Headers, fh.Type);
Assert.Equal(1u, fh.StreamId);
var expectedFlags =
HeadersFrameFlags.EndOfHeaders | HeadersFrameFlags.EndOfStream;
Assert.Equal((byte)expectedFlags, fh.Flags);
Assert.InRange(fh.Length, 1, 1024);
var headerData = new byte[fh.Length];
await outPipe.ReadAllWithTimeout(new ArraySegment <byte>(headerData));
Assert.Equal(EncodedDefaultTrailingHeaders, headerData);
}
public async Task ConnectionShouldRespondToPingWithPong(bool isServer)
{
var inPipe = new BufferedPipe(1024);
var outPipe = new BufferedPipe(1024);
var http2Con = await ConnectionUtils.BuildEstablishedConnection(
isServer, inPipe, outPipe, loggerProvider);
var pingData = new byte[8];
for (var i = 0; i < pingData.Length; i++)
{
pingData[i] = (byte)i;
}
await inPipe.WritePing(pingData, false);
var res = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(FrameType.Ping, res.Type);
Assert.Equal(0u, res.StreamId);
Assert.Equal(8, res.Length);
Assert.Equal((byte)PingFrameFlags.Ack, res.Flags);
var pongData = new byte[8];
await outPipe.ReadAllWithTimeout(new ArraySegment <byte>(pongData));
for (var i = 0; i < pingData.Length; i++)
{
Assert.Equal((byte)i, pongData[i]);
}
}
public async Task PingShouldFailWhenConnectionIsClosedAfterPingStart()
{
var inPipe = new BufferedPipe(1024);
var outPipe = new BufferedPipe(1024);
var http2Con = await ConnectionUtils.BuildEstablishedConnection(
true, inPipe, outPipe, loggerProvider);
// Request ping
var pingTask = http2Con.PingAsync();
// Expect ping emission
var fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(FrameType.Ping, fh.Type);
Assert.Equal(8, fh.Length);
Assert.Equal(0, fh.Flags);
Assert.Equal(0u, fh.StreamId);
var pingData = new ArraySegment <byte>(new byte[8]);
await outPipe.ReadAllWithTimeout(pingData);
// Close the connection
await inPipe.CloseAsync();
await outPipe.AssertStreamEnd();
// Await ping to finish with exception
var timeoutTask = Task.Delay(200);
Assert.True(
pingTask == await Task.WhenAny(pingTask, timeoutTask),
"Expected pingTask to finish");
await Assert.ThrowsAsync <ConnectionClosedException>(
async() => await pingTask);
}
public async Task PingAsyncShouldSendPingAndWaitForAssociatedAck()
{
var inPipe = new BufferedPipe(1024);
var outPipe = new BufferedPipe(1024);
var http2Con = await ConnectionUtils.BuildEstablishedConnection(
true, inPipe, outPipe, loggerProvider);
// Request ping
var pingTask = http2Con.PingAsync();
// Expect ping emission
var fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(FrameType.Ping, fh.Type);
Assert.Equal(8, fh.Length);
Assert.Equal(0, fh.Flags);
Assert.Equal(0u, fh.StreamId);
var pingData = new ArraySegment <byte>(new byte[8]);
await outPipe.ReadAllWithTimeout(pingData);
// Respond with pong
fh.Flags = (byte)PingFrameFlags.Ack;
await inPipe.WriteFrameHeader(fh);
await inPipe.WriteAsync(pingData);
// Await ping task to finish
Assert.True(
pingTask == await Task.WhenAny(pingTask, Task.Delay(200)),
"Expected pingTask to finish");
}
public async Task IfSettingsDecreaseHeaderTableNextOutgoingHeadersShouldContainAnUpdate()
{
var inPipe = new BufferedPipe(1024);
var outPipe = new BufferedPipe(1024);
Func <IStream, bool> listener = (s) =>
{
Task.Run(() =>
{
var res = new HeaderField[]
{
new HeaderField {
Name = ":status", Value = "200"
},
};
s.WriteHeadersAsync(res, false);
});
return(true);
};
var http2Con = await ConnectionUtils.BuildEstablishedConnection(
true, inPipe, outPipe, loggerProvider, listener);
// Change remote settings 2 times
var settings = Settings.Default;
settings.HeaderTableSize = 8;
await inPipe.WriteSettings(settings);
await outPipe.AssertSettingsAck();
settings.HeaderTableSize = 30;
await inPipe.WriteSettings(settings);
await outPipe.AssertSettingsAck();
// Establish a stream
// When we send a response through it we should observe the size udpate
var hEncoder = new Encoder();
await inPipe.WriteHeaders(hEncoder, 1, false, DefaultGetHeaders);
// Wait for the incoming status headers with header update
var fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(FrameType.Headers, fh.Type);
Assert.Equal((byte)(HeadersFrameFlags.EndOfHeaders), fh.Flags);
Assert.Equal(1u, fh.StreamId);
Assert.Equal(3, fh.Length);
var data = new byte[fh.Length];
await outPipe.ReadAllWithTimeout(new ArraySegment <byte>(data));
Assert.Equal(0x28, data[0]); // Size Update to 8
Assert.Equal(0x3e, data[1]); // Size Update to 30
Assert.Equal(0x88, data[2]); // :status 200
}
public async Task CreatingStreamShouldEmitHeaders()
{
var inPipe = new BufferedPipe(1024);
var outPipe = new BufferedPipe(1024);
var conn = await ConnectionUtils.BuildEstablishedConnection(
false, inPipe, outPipe, loggerProvider);
var stream1Task = conn.CreateStreamAsync(DefaultGetHeaders, false);
var stream1 = await stream1Task;
Assert.Equal(StreamState.Open, stream1.State);
Assert.Equal(1u, stream1.Id);
var fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(1u, fh.StreamId);
Assert.Equal(FrameType.Headers, fh.Type);
Assert.Equal((byte)HeadersFrameFlags.EndOfHeaders, fh.Flags);
Assert.Equal(EncodedDefaultGetHeaders.Length, fh.Length);
var hdrData = new byte[fh.Length];
await outPipe.ReadWithTimeout(new ArraySegment <byte>(hdrData));
Assert.Equal(EncodedDefaultGetHeaders, hdrData);
var stream3Task = conn.CreateStreamAsync(DefaultGetHeaders, true);
var stream3 = await stream3Task;
Assert.Equal(StreamState.HalfClosedLocal, stream3.State);
Assert.Equal(3u, stream3.Id);
fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(3u, fh.StreamId);
Assert.Equal(FrameType.Headers, fh.Type);
Assert.Equal(
(byte)(HeadersFrameFlags.EndOfHeaders | HeadersFrameFlags.EndOfStream),
fh.Flags);
Assert.Equal(EncodedIndexedDefaultGetHeaders.Length, fh.Length);
var hdrData3 = new byte[fh.Length];
await outPipe.ReadWithTimeout(new ArraySegment <byte>(hdrData3));
Assert.Equal(EncodedIndexedDefaultGetHeaders, hdrData3);
}
public async Task CreatedStreamsShouldAlwaysUseIncreasedStreamIds(
int nrStreams)
{
// This test checks if there are race conditions in the stream
// establish code
var inPipe = new BufferedPipe(10 * 1024);
var outPipe = new BufferedPipe(10 * 1024);
var conn = await ConnectionUtils.BuildEstablishedConnection(
false, inPipe, outPipe, loggerProvider);
var createStreamTasks = new Task <IStream> [nrStreams];
for (var i = 0; i < nrStreams; i++)
{
// Create the task in the threadpool
var t = Task.Run(
() => conn.CreateStreamAsync(DefaultGetHeaders, false));
createStreamTasks[i] = t;
}
// Wait until all streams are open
await Task.WhenAll(createStreamTasks);
var streams = createStreamTasks.Select(t => t.Result).ToList();
// Check output data
// Sequence IDs must be always increasing
var buffer = new byte[Settings.Default.MaxFrameSize];
for (var i = 0; i < nrStreams; i++)
{
var expectedId = 1u + 2 * i;
var fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(expectedId, fh.StreamId);
Assert.Equal(FrameType.Headers, fh.Type);
Assert.Equal((byte)HeadersFrameFlags.EndOfHeaders, fh.Flags);
// Discard header data
await outPipe.ReadWithTimeout(
new ArraySegment <byte>(buffer, 0, fh.Length));
}
}
public async Task ResponseHeadersShouldBeCorrectlySent(
bool useEndOfStream)
{
var inPipe = new BufferedPipe(1024);
var outPipe = new BufferedPipe(1024);
var r = await StreamCreator.CreateConnectionAndStream(
StreamState.Open, loggerProvider, inPipe, outPipe);
await r.stream.WriteHeadersAsync(DefaultStatusHeaders, useEndOfStream);
// Check the received headers
var fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(FrameType.Headers, fh.Type);
Assert.Equal(1u, fh.StreamId);
var expectedFlags = HeadersFrameFlags.EndOfHeaders;
if (useEndOfStream) expectedFlags |= HeadersFrameFlags.EndOfStream;
Assert.Equal((byte)expectedFlags, fh.Flags);
Assert.InRange(fh.Length, 1, 1024);
var headerData = new byte[fh.Length];
await outPipe.ReadAllWithTimeout(new ArraySegment<byte>(headerData));
Assert.Equal(EncodedDefaultStatusHeaders, headerData);
}
public async Task PingAsyncShouldNotCompleteWhenWrongPingResponseIsReceived()
{
var inPipe = new BufferedPipe(1024);
var outPipe = new BufferedPipe(1024);
var http2Con = await ConnectionUtils.BuildEstablishedConnection(
true, inPipe, outPipe, loggerProvider);
// Request ping
var pingTask = http2Con.PingAsync();
// Expect ping emission
var fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(FrameType.Ping, fh.Type);
Assert.Equal(8, fh.Length);
Assert.Equal(0, fh.Flags);
Assert.Equal(0u, fh.StreamId);
var pingData = new ArraySegment <byte>(new byte[8]);
await outPipe.ReadAllWithTimeout(pingData);
// Respond with pong and manipulated data
fh.Flags = (byte)PingFrameFlags.Ack;
for (var i = 0; i < pingData.Count; i++)
{
pingData.Array[i] = 0xFF;
}
await inPipe.WriteFrameHeader(fh);
await inPipe.WriteAsync(pingData);
// Await ping not to finish
var timeoutTask = Task.Delay(200);
Assert.True(
timeoutTask == await Task.WhenAny(pingTask, timeoutTask),
"Expected pingTask not to finish");
}
public async Task PingAsyncShouldUseIncreasingIds()
{
var inPipe = new BufferedPipe(1024);
var outPipe = new BufferedPipe(1024);
var http2Con = await ConnectionUtils.BuildEstablishedConnection(
true, inPipe, outPipe, loggerProvider);
for (var expectedId = 0u; expectedId < 3u; expectedId++)
{
// Request ping
var pingTask = http2Con.PingAsync();
// Expect ping emission with that ID
var fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(FrameType.Ping, fh.Type);
Assert.Equal(8, fh.Length);
Assert.Equal(0, fh.Flags);
Assert.Equal(0u, fh.StreamId);
var pingData = new ArraySegment <byte>(new byte[8]);
await outPipe.ReadAllWithTimeout(pingData);
Assert.Equal(expectedId, BitConverter.ToUInt64(pingData.Array, 0));
}
}
public async Task DataShouldBeCorrectlySent(
bool isServer, int[] dataLength)
{
var inPipe = new BufferedPipe(1024);
var outPipe = new BufferedPipe(1024);
var r = await StreamCreator.CreateConnectionAndStream(
isServer, loggerProvider, inPipe, outPipe);
var totalToSend = dataLength.Aggregate(0, (sum, n) => sum + n);
var writeTask = Task.Run(async() =>
{
byte nr = 0;
for (var i = 0; i < dataLength.Length; i++)
{
var toSend = dataLength[i];
var isEndOfStream = i == (dataLength.Length - 1);
var buffer = new byte[toSend];
for (var j = 0; j < toSend; j++)
{
buffer[j] = nr;
nr++;
if (nr > 122)
{
nr = 0;
}
}
await r.stream.WriteAsync(
new ArraySegment <byte>(buffer), isEndOfStream);
}
});
var data = new byte[totalToSend];
var offset = 0;
for (var i = 0; i < dataLength.Length; i++)
{
var fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(FrameType.Data, fh.Type);
Assert.Equal(1u, fh.StreamId);
var expectEOS = i == dataLength.Length - 1;
var gotEOS = (fh.Flags & (byte)DataFrameFlags.EndOfStream) != 0;
Assert.Equal(expectEOS, gotEOS);
Assert.Equal(dataLength[i], fh.Length);
var part = new byte[fh.Length];
await outPipe.ReadAllWithTimeout(new ArraySegment <byte>(part));
Array.Copy(part, 0, data, offset, fh.Length);
offset += fh.Length;
}
var doneTask = await Task.WhenAny(writeTask, Task.Delay(250));
Assert.True(writeTask == doneTask, "Expected write task to finish");
// Check if the correct data was received
var expected = 0;
for (var j = 0; j < totalToSend; j++)
{
Assert.Equal(expected, data[j]);
expected++;
if (expected > 122)
{
expected = 0;
}
}
}
public async Task TheRemoteHeaderTableSizeShouldOnlyBeUsedUpToConfiguredLimit()
{
var inPipe = new BufferedPipe(1024);
var outPipe = new BufferedPipe(1024);
var handlerDone = new SemaphoreSlim(0);
Func <IStream, bool> listener = (s) =>
{
Task.Run(() =>
{
var res = new HeaderField[]
{
new HeaderField {
Name = ":status", Value = "200"
},
};
s.WriteHeadersAsync(res, false);
});
handlerDone.Release();
return(true);
};
// Lower the initial window size so that stream window updates are
// sent earlier than connection window updates
var localSettings = Settings.Default;
localSettings.HeaderTableSize = 20000;
var http2Con = await ConnectionUtils.BuildEstablishedConnection(
true, inPipe, outPipe, loggerProvider, listener,
localSettings : localSettings);
// Change remote settings, which grants us a giant header table
var settings = Settings.Default;
settings.HeaderTableSize = 50 * 1024 * 1024;
await inPipe.WriteSettings(settings);
await outPipe.AssertSettingsAck();
// Establish a stream
// When we send a response through it we should observe the size udpate
var hEncoder = new Encoder();
await inPipe.WriteHeaders(hEncoder, 1, false, DefaultGetHeaders);
var ok = await handlerDone.WaitAsync(
ReadableStreamTestExtensions.ReadTimeout);
if (!ok)
{
throw new Exception("Stream was not created");
}
// Wait for the incoming status headers with header update
var fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(FrameType.Headers, fh.Type);
Assert.Equal((byte)(HeadersFrameFlags.EndOfHeaders), fh.Flags);
Assert.Equal(1u, fh.StreamId);
// Observe headers with status update
// We should update the header table to 20000
Assert.Equal(5, fh.Length);
var data = new byte[fh.Length];
await outPipe.ReadAllWithTimeout(new ArraySegment <byte>(data));
Assert.Equal(0x3f, data[0]); // Size Update to 20000 => 20000 - 31 = 19969
Assert.Equal(0x81, data[1]); // 19969 % 128 + 128 = 0x81, 19969 / 128 = 156
Assert.Equal(0x9c, data[2]); // 156 % 128 + 128 = 0x9c, 156 / 128 = 1
Assert.Equal(0x01, data[3]); // 1
Assert.Equal(0x88, data[4]); // :status 200
}
[InlineData(65535, 100 * 1024, 2, 7)] // Continuations required
public async Task OutgoingHeadersShouldBeFragmentedIntoContinuationsAccordingToFrameSize(
int maxFrameSize, int totalHeaderBytes,
int expectedMinNrOfFrames, int expectedMaxNrOfFrames)
{
var inPipe = new BufferedPipe(1024);
var outPipe = new BufferedPipe(1024);
var remoteSettings = Settings.Default;
remoteSettings.MaxFrameSize = (uint)maxFrameSize;
var res = await ServerStreamTests.StreamCreator.CreateConnectionAndStream(
StreamState.Open, loggerProvider, inPipe, outPipe,
remoteSettings : remoteSettings,
huffmanStrategy : HuffmanStrategy.Never);
// Create the list of headers that should be sent
// This must be big enough in order to send multiple frames
var headers = new List <HeaderField>();
// The :status header is necessary to avoid an exception on send
headers.AddRange(
DefaultStatusHeaders.TakeWhile(sh =>
sh.Name.StartsWith(":")));
const int headerLen = 3 + 10 + 8; // The calculated size of one header field
// Calculate the amount of headers of the given size that are needed
// to be sent based on the required totalHeaderBytes number.
int requiredHeaderData = totalHeaderBytes - 1; // -1 for :status field
int amountHeaders = requiredHeaderData / headerLen;
for (var i = 0; i < amountHeaders; i++)
{
var headerField = new HeaderField
{
Name = "hd" + i.ToString("D8"),
Value = i.ToString("D8"),
Sensitive = true,
};
headers.Add(headerField);
}
// Send the headers in background task
var writeHeaderTask = Task.Run(async() =>
{
await res.stream.WriteHeadersAsync(headers, false);
});
var hDecoder = new Decoder();
var hBuf = new byte[maxFrameSize];
var expectCont = false;
var rcvdFrames = 0;
var rcvdHeaders = new List <HeaderField>();
while (true)
{
var fh = await outPipe.ReadFrameHeaderWithTimeout();
Assert.Equal(expectCont ? FrameType.Continuation : FrameType.Headers, fh.Type);
Assert.Equal(1u, fh.StreamId);
Assert.InRange(fh.Length, 1, maxFrameSize);
// Read header block fragment data
await outPipe.ReadAllWithTimeout(
new ArraySegment <byte>(hBuf, 0, fh.Length));
// Decode it
var lastHeadersCount = rcvdHeaders.Count;
var decodeResult = hDecoder.DecodeHeaderBlockFragment(
new ArraySegment <byte>(hBuf, 0, fh.Length),
int.MaxValue,
rcvdHeaders);
Assert.True(
rcvdHeaders.Count > lastHeadersCount,
"Expected to retrieve at least one header per frame");
Assert.Equal(DecoderExtensions.DecodeStatus.Success, decodeResult.Status);
expectCont = true;
rcvdFrames++;
if ((fh.Flags & (byte)ContinuationFrameFlags.EndOfHeaders) != 0)
{
break;
}
}
Assert.InRange(rcvdFrames, expectedMinNrOfFrames, expectedMaxNrOfFrames);
Assert.Equal(headers.Count, rcvdHeaders.Count);
Assert.True(rcvdHeaders.SequenceEqual(headers));
}