577 lines
22 KiB
Java
577 lines
22 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License, version 2.0 (the
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* "License"); you may not use this file except in compliance with the License. You may obtain a
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* copy of the License at:
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the License
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* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing permissions and limitations under
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* the License.
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*/
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package io.netty.handler.codec.http2;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.Unpooled;
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import io.netty.buffer.UnpooledByteBufAllocator;
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import io.netty.channel.Channel;
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import io.netty.channel.ChannelConfig;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelMetadata;
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import io.netty.channel.DefaultMessageSizeEstimator;
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import io.netty.handler.codec.http2.StreamBufferingEncoder.Http2GoAwayException;
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import io.netty.util.ReferenceCountUtil;
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import io.netty.util.concurrent.EventExecutor;
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import io.netty.util.concurrent.Future;
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import io.netty.util.concurrent.ImmediateEventExecutor;
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import io.netty.util.concurrent.Promise;
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import org.junit.jupiter.api.AfterEach;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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import org.mockito.ArgumentCaptor;
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import org.mockito.Mock;
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import org.mockito.MockitoAnnotations;
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import org.mockito.invocation.InvocationOnMock;
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import org.mockito.stubbing.Answer;
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import org.mockito.verification.VerificationMode;
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import java.util.ArrayList;
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import java.util.List;
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import static io.netty.buffer.Unpooled.EMPTY_BUFFER;
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import static io.netty.handler.codec.http2.Http2CodecUtil.DEFAULT_MAX_FRAME_SIZE;
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import static io.netty.handler.codec.http2.Http2CodecUtil.DEFAULT_PRIORITY_WEIGHT;
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import static io.netty.handler.codec.http2.Http2CodecUtil.SMALLEST_MAX_CONCURRENT_STREAMS;
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import static io.netty.handler.codec.http2.Http2Error.CANCEL;
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import static io.netty.handler.codec.http2.Http2Stream.State.HALF_CLOSED_LOCAL;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertFalse;
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import static org.junit.jupiter.api.Assertions.assertNotNull;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import static org.mockito.Mockito.any;
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import static org.mockito.Mockito.anyBoolean;
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import static org.mockito.Mockito.anyInt;
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import static org.mockito.Mockito.anyLong;
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import static org.mockito.Mockito.anyShort;
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import static org.mockito.Mockito.doAnswer;
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import static org.mockito.Mockito.eq;
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import static org.mockito.Mockito.mock;
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import static org.mockito.Mockito.never;
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import static org.mockito.Mockito.times;
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import static org.mockito.Mockito.verify;
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import static org.mockito.Mockito.when;
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/**
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* Tests for {@link StreamBufferingEncoder}.
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*/
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@SuppressWarnings("unchecked")
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public class StreamBufferingEncoderTest {
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private StreamBufferingEncoder encoder;
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private Http2Connection connection;
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@Mock
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private Http2FrameWriter writer;
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@Mock
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private ChannelHandlerContext ctx;
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@Mock
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private Channel channel;
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@Mock
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private Channel.Unsafe unsafe;
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@Mock
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private ChannelConfig config;
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@Mock
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private EventExecutor executor;
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/**
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* Init fields and do mocking.
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*/
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@BeforeEach
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public void setup() throws Exception {
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MockitoAnnotations.initMocks(this);
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Http2FrameWriter.Configuration configuration = mock(Http2FrameWriter.Configuration.class);
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Http2FrameSizePolicy frameSizePolicy = mock(Http2FrameSizePolicy.class);
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when(writer.configuration()).thenReturn(configuration);
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when(configuration.frameSizePolicy()).thenReturn(frameSizePolicy);
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when(frameSizePolicy.maxFrameSize()).thenReturn(DEFAULT_MAX_FRAME_SIZE);
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when(writer.writeData(any(ChannelHandlerContext.class), anyInt(), any(ByteBuf.class), anyInt(), anyBoolean()))
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.thenAnswer(successAnswer());
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when(writer.writeRstStream(eq(ctx), anyInt(), anyLong())).thenAnswer(
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successAnswer());
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when(writer.writeGoAway(any(ChannelHandlerContext.class), anyInt(), anyLong(), any(ByteBuf.class)))
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.thenAnswer(successAnswer());
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when(writer.writeHeaders(any(ChannelHandlerContext.class), anyInt(), any(Http2Headers.class),
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anyInt(), anyBoolean())).thenAnswer(noopAnswer());
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when(writer.writeHeaders(any(ChannelHandlerContext.class), anyInt(), any(Http2Headers.class),
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anyInt(), anyShort(), anyBoolean(), anyInt(), anyBoolean()))
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.thenAnswer(noopAnswer());
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connection = new DefaultHttp2Connection(false);
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connection.remote().flowController(new DefaultHttp2RemoteFlowController(connection));
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connection.local().flowController(new DefaultHttp2LocalFlowController(connection).frameWriter(writer));
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DefaultHttp2ConnectionEncoder defaultEncoder =
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new DefaultHttp2ConnectionEncoder(connection, writer);
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encoder = new StreamBufferingEncoder(defaultEncoder);
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DefaultHttp2ConnectionDecoder decoder =
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new DefaultHttp2ConnectionDecoder(connection, encoder, mock(Http2FrameReader.class));
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Http2ConnectionHandler handler = new Http2ConnectionHandlerBuilder()
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.frameListener(mock(Http2FrameListener.class))
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.codec(decoder, encoder).build();
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// Set LifeCycleManager on encoder and decoder
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when(ctx.channel()).thenReturn(channel);
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when(ctx.alloc()).thenReturn(UnpooledByteBufAllocator.DEFAULT);
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when(channel.alloc()).thenReturn(UnpooledByteBufAllocator.DEFAULT);
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when(executor.inEventLoop()).thenReturn(true);
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doAnswer((Answer<Promise<Void>>) invocation -> newPromise()).when(ctx).newPromise();
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doAnswer((Answer<Future<Void>>) invocation -> ImmediateEventExecutor.INSTANCE.newSucceededFuture(null))
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.when(ctx).newSucceededFuture();
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doAnswer((Answer<Future<Void>>) invocation ->
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ImmediateEventExecutor.INSTANCE.newFailedFuture(invocation.getArgument(0)))
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.when(ctx).newFailedFuture(any(Throwable.class));
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when(ctx.executor()).thenReturn(executor);
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when(channel.isActive()).thenReturn(false);
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when(channel.config()).thenReturn(config);
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when(channel.isWritable()).thenReturn(true);
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when(channel.bytesBeforeUnwritable()).thenReturn(Long.MAX_VALUE);
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when(config.getWriteBufferHighWaterMark()).thenReturn(Integer.MAX_VALUE);
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when(config.getMessageSizeEstimator()).thenReturn(DefaultMessageSizeEstimator.DEFAULT);
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ChannelMetadata metadata = new ChannelMetadata(false, 16);
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when(channel.metadata()).thenReturn(metadata);
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when(channel.unsafe()).thenReturn(unsafe);
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handler.handlerAdded(ctx);
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}
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@AfterEach
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public void teardown() {
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// Close and release any buffered frames.
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encoder.close();
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}
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@Test
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public void multipleWritesToActiveStream() {
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encoder.writeSettingsAck(ctx);
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encoderWriteHeaders(3);
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assertEquals(0, encoder.numBufferedStreams());
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ByteBuf data = data();
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final int expectedBytes = data.readableBytes() * 3;
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encoder.writeData(ctx, 3, data, 0, false);
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encoder.writeData(ctx, 3, data(), 0, false);
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encoder.writeData(ctx, 3, data(), 0, false);
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encoderWriteHeaders(3);
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writeVerifyWriteHeaders(times(1), 3);
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// Contiguous data writes are coalesced
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ArgumentCaptor<ByteBuf> bufCaptor = ArgumentCaptor.forClass(ByteBuf.class);
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verify(writer, times(1)).writeData(any(ChannelHandlerContext.class), eq(3),
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bufCaptor.capture(), eq(0), eq(false));
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assertEquals(expectedBytes, bufCaptor.getValue().readableBytes());
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}
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@Test
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public void ensureCanCreateNextStreamWhenStreamCloses() {
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encoder.writeSettingsAck(ctx);
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setMaxConcurrentStreams(1);
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encoderWriteHeaders(3);
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assertEquals(0, encoder.numBufferedStreams());
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// This one gets buffered.
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encoderWriteHeaders(5);
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assertEquals(1, connection.numActiveStreams());
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assertEquals(1, encoder.numBufferedStreams());
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// Now prevent us from creating another stream.
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setMaxConcurrentStreams(0);
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// Close the previous stream.
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connection.stream(3).close();
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// Ensure that no streams are currently active and that only the HEADERS from the first
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// stream were written.
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writeVerifyWriteHeaders(times(1), 3);
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writeVerifyWriteHeaders(never(), 5);
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assertEquals(0, connection.numActiveStreams());
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assertEquals(1, encoder.numBufferedStreams());
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}
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@Test
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public void alternatingWritesToActiveAndBufferedStreams() {
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encoder.writeSettingsAck(ctx);
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setMaxConcurrentStreams(1);
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encoderWriteHeaders(3);
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assertEquals(0, encoder.numBufferedStreams());
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encoderWriteHeaders(5);
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assertEquals(1, connection.numActiveStreams());
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assertEquals(1, encoder.numBufferedStreams());
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encoder.writeData(ctx, 3, EMPTY_BUFFER, 0, false);
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writeVerifyWriteHeaders(times(1), 3);
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encoder.writeData(ctx, 5, EMPTY_BUFFER, 0, false);
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verify(writer, never())
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.writeData(eq(ctx), eq(5), any(ByteBuf.class), eq(0), eq(false));
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}
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@Test
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public void bufferingNewStreamFailsAfterGoAwayReceived() throws Http2Exception {
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encoder.writeSettingsAck(ctx);
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setMaxConcurrentStreams(0);
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connection.goAwayReceived(1, 8, EMPTY_BUFFER);
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Future<Void> future = encoderWriteHeaders(3);
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assertEquals(0, encoder.numBufferedStreams());
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assertTrue(future.isDone());
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assertFalse(future.isSuccess());
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}
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@Test
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public void receivingGoAwayFailsBufferedStreams() throws Http2Exception {
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encoder.writeSettingsAck(ctx);
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setMaxConcurrentStreams(5);
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int streamId = 3;
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List<Future<Void>> futures = new ArrayList<>();
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for (int i = 0; i < 9; i++) {
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futures.add(encoderWriteHeaders(streamId));
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streamId += 2;
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}
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assertEquals(5, connection.numActiveStreams());
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assertEquals(4, encoder.numBufferedStreams());
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connection.goAwayReceived(11, 8, EMPTY_BUFFER);
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assertEquals(5, connection.numActiveStreams());
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assertEquals(0, encoder.numBufferedStreams());
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int failCount = 0;
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for (Future<Void> f : futures) {
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if (f.isFailed()) {
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assertTrue(f.cause() instanceof Http2GoAwayException);
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failCount++;
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}
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}
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assertEquals(4, failCount);
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}
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@Test
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public void receivingGoAwayFailsNewStreamIfMaxConcurrentStreamsReached() throws Http2Exception {
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encoder.writeSettingsAck(ctx);
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setMaxConcurrentStreams(1);
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encoderWriteHeaders(3);
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connection.goAwayReceived(11, 8, EMPTY_BUFFER);
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Future<Void> f = encoderWriteHeaders(5);
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assertTrue(f.awaitUninterruptibly().cause() instanceof Http2GoAwayException);
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assertEquals(0, encoder.numBufferedStreams());
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}
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@Test
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public void sendingGoAwayShouldNotFailStreams() {
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encoder.writeSettingsAck(ctx);
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setMaxConcurrentStreams(1);
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when(writer.writeHeaders(any(ChannelHandlerContext.class), anyInt(), any(Http2Headers.class), anyInt(),
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anyBoolean())).thenAnswer(successAnswer());
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when(writer.writeHeaders(any(ChannelHandlerContext.class), anyInt(), any(Http2Headers.class), anyInt(),
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anyShort(), anyBoolean(), anyInt(), anyBoolean())).thenAnswer(successAnswer());
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Future<Void> f1 = encoderWriteHeaders(3);
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assertEquals(0, encoder.numBufferedStreams());
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Future<Void> f2 = encoderWriteHeaders(5);
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assertEquals(1, encoder.numBufferedStreams());
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Future<Void> f3 = encoderWriteHeaders(7);
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assertEquals(2, encoder.numBufferedStreams());
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ByteBuf empty = Unpooled.buffer(0);
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encoder.writeGoAway(ctx, 3, CANCEL.code(), empty);
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assertEquals(1, connection.numActiveStreams());
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assertEquals(2, encoder.numBufferedStreams());
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// As the first stream did exists the first future should be done.
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assertTrue(f1.isDone());
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assertFalse(f2.isDone());
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assertFalse(f3.isDone());
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}
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@Test
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public void endStreamDoesNotFailBufferedStream() {
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encoder.writeSettingsAck(ctx);
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setMaxConcurrentStreams(0);
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encoderWriteHeaders(3);
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assertEquals(1, encoder.numBufferedStreams());
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encoder.writeData(ctx, 3, EMPTY_BUFFER, 0, true);
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assertEquals(0, connection.numActiveStreams());
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assertEquals(1, encoder.numBufferedStreams());
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// Simulate that we received a SETTINGS frame which
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// increased MAX_CONCURRENT_STREAMS to 1.
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setMaxConcurrentStreams(1);
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encoder.writeSettingsAck(ctx);
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assertEquals(1, connection.numActiveStreams());
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assertEquals(0, encoder.numBufferedStreams());
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assertEquals(HALF_CLOSED_LOCAL, connection.stream(3).state());
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}
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@Test
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public void rstStreamClosesBufferedStream() {
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encoder.writeSettingsAck(ctx);
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setMaxConcurrentStreams(0);
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encoderWriteHeaders(3);
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assertEquals(1, encoder.numBufferedStreams());
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Future<Void> rstStreamFuture = encoder.writeRstStream(ctx, 3, CANCEL.code());
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assertTrue(rstStreamFuture.isSuccess());
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assertEquals(0, encoder.numBufferedStreams());
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}
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@Test
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public void bufferUntilActiveStreamsAreReset() throws Exception {
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encoder.writeSettingsAck(ctx);
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setMaxConcurrentStreams(1);
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encoderWriteHeaders(3);
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assertEquals(0, encoder.numBufferedStreams());
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encoderWriteHeaders(5);
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assertEquals(1, encoder.numBufferedStreams());
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encoderWriteHeaders(7);
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assertEquals(2, encoder.numBufferedStreams());
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writeVerifyWriteHeaders(times(1), 3);
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writeVerifyWriteHeaders(never(), 5);
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writeVerifyWriteHeaders(never(), 7);
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encoder.writeRstStream(ctx, 3, CANCEL.code());
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connection.remote().flowController().writePendingBytes();
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writeVerifyWriteHeaders(times(1), 5);
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writeVerifyWriteHeaders(never(), 7);
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assertEquals(1, connection.numActiveStreams());
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assertEquals(1, encoder.numBufferedStreams());
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encoder.writeRstStream(ctx, 5, CANCEL.code());
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connection.remote().flowController().writePendingBytes();
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writeVerifyWriteHeaders(times(1), 7);
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assertEquals(1, connection.numActiveStreams());
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assertEquals(0, encoder.numBufferedStreams());
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encoder.writeRstStream(ctx, 7, CANCEL.code());
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assertEquals(0, connection.numActiveStreams());
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assertEquals(0, encoder.numBufferedStreams());
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}
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@Test
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public void bufferUntilMaxStreamsIncreased() {
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encoder.writeSettingsAck(ctx);
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setMaxConcurrentStreams(2);
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encoderWriteHeaders(3);
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encoderWriteHeaders(5);
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encoderWriteHeaders(7);
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encoderWriteHeaders(9);
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assertEquals(2, encoder.numBufferedStreams());
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writeVerifyWriteHeaders(times(1), 3);
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writeVerifyWriteHeaders(times(1), 5);
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writeVerifyWriteHeaders(never(), 7);
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writeVerifyWriteHeaders(never(), 9);
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// Simulate that we received a SETTINGS frame which
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// increased MAX_CONCURRENT_STREAMS to 5.
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setMaxConcurrentStreams(5);
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encoder.writeSettingsAck(ctx);
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assertEquals(0, encoder.numBufferedStreams());
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writeVerifyWriteHeaders(times(1), 7);
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writeVerifyWriteHeaders(times(1), 9);
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encoderWriteHeaders(11);
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writeVerifyWriteHeaders(times(1), 11);
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assertEquals(5, connection.local().numActiveStreams());
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}
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@Test
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public void bufferUntilSettingsReceived() throws Http2Exception {
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int initialLimit = SMALLEST_MAX_CONCURRENT_STREAMS;
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int numStreams = initialLimit * 2;
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for (int ix = 0, nextStreamId = 3; ix < numStreams; ++ix, nextStreamId += 2) {
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encoderWriteHeaders(nextStreamId);
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if (ix < initialLimit) {
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writeVerifyWriteHeaders(times(1), nextStreamId);
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} else {
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writeVerifyWriteHeaders(never(), nextStreamId);
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}
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}
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assertEquals(numStreams / 2, encoder.numBufferedStreams());
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// Simulate that we received a SETTINGS frame.
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setMaxConcurrentStreams(initialLimit * 2);
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assertEquals(0, encoder.numBufferedStreams());
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assertEquals(numStreams, connection.local().numActiveStreams());
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}
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@Test
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public void bufferUntilSettingsReceivedWithNoMaxConcurrentStreamValue() throws Http2Exception {
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int initialLimit = SMALLEST_MAX_CONCURRENT_STREAMS;
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int numStreams = initialLimit * 2;
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for (int ix = 0, nextStreamId = 3; ix < numStreams; ++ix, nextStreamId += 2) {
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encoderWriteHeaders(nextStreamId);
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if (ix < initialLimit) {
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writeVerifyWriteHeaders(times(1), nextStreamId);
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} else {
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writeVerifyWriteHeaders(never(), nextStreamId);
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}
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}
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assertEquals(numStreams / 2, encoder.numBufferedStreams());
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// Simulate that we received an empty SETTINGS frame.
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encoder.remoteSettings(new Http2Settings());
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assertEquals(0, encoder.numBufferedStreams());
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assertEquals(numStreams, connection.local().numActiveStreams());
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}
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@Test
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public void exhaustedStreamsDoNotBuffer() throws Http2Exception {
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// Write the highest possible stream ID for the client.
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// This will cause the next stream ID to be negative.
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encoderWriteHeaders(Integer.MAX_VALUE);
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// Disallow any further streams.
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setMaxConcurrentStreams(0);
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// Simulate numeric overflow for the next stream ID.
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Future<Void> f = encoderWriteHeaders(-1);
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// Verify that the write fails.
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assertNotNull(f.awaitUninterruptibly().cause());
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}
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@Test
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public void closedBufferedStreamReleasesByteBuf() {
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encoder.writeSettingsAck(ctx);
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setMaxConcurrentStreams(0);
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ByteBuf data = mock(ByteBuf.class);
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Future<Void> f1 = encoderWriteHeaders(3);
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assertEquals(1, encoder.numBufferedStreams());
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Future<Void> f2 = encoder.writeData(ctx, 3, data, 0, false);
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Future<Void> rstFuture = encoder.writeRstStream(ctx, 3, CANCEL.code());
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assertEquals(0, encoder.numBufferedStreams());
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assertTrue(rstFuture.isSuccess());
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assertTrue(f1.isSuccess());
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assertTrue(f2.isSuccess());
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verify(data).release();
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}
|
|
|
|
@Test
|
|
public void closeShouldCancelAllBufferedStreams() throws Http2Exception {
|
|
encoder.writeSettingsAck(ctx);
|
|
connection.local().maxActiveStreams(0);
|
|
|
|
Future<Void> f1 = encoderWriteHeaders(3);
|
|
Future<Void> f2 = encoderWriteHeaders(5);
|
|
Future<Void> f3 = encoderWriteHeaders(7);
|
|
|
|
encoder.close();
|
|
assertNotNull(f1.awaitUninterruptibly().cause());
|
|
assertNotNull(f2.awaitUninterruptibly().cause());
|
|
assertNotNull(f3.awaitUninterruptibly().cause());
|
|
}
|
|
|
|
@Test
|
|
public void headersAfterCloseShouldImmediatelyFail() {
|
|
encoder.writeSettingsAck(ctx);
|
|
encoder.close();
|
|
|
|
Future<Void> f = encoderWriteHeaders(3);
|
|
assertNotNull(f.cause());
|
|
}
|
|
|
|
private void setMaxConcurrentStreams(int newValue) {
|
|
try {
|
|
encoder.remoteSettings(new Http2Settings().maxConcurrentStreams(newValue));
|
|
// Flush the remote flow controller to write data
|
|
encoder.flowController().writePendingBytes();
|
|
} catch (Http2Exception e) {
|
|
throw new RuntimeException(e);
|
|
}
|
|
}
|
|
|
|
private Future<Void> encoderWriteHeaders(int streamId) {
|
|
Future<Void> future =
|
|
encoder.writeHeaders(ctx, streamId, new DefaultHttp2Headers(), 0, DEFAULT_PRIORITY_WEIGHT,
|
|
false, 0, false);
|
|
try {
|
|
encoder.flowController().writePendingBytes();
|
|
return future;
|
|
} catch (Http2Exception e) {
|
|
throw new RuntimeException(e);
|
|
}
|
|
}
|
|
|
|
private void writeVerifyWriteHeaders(VerificationMode mode, int streamId) {
|
|
verify(writer, mode).writeHeaders(eq(ctx), eq(streamId), any(Http2Headers.class), eq(0),
|
|
eq(DEFAULT_PRIORITY_WEIGHT), eq(false), eq(0),
|
|
eq(false));
|
|
}
|
|
|
|
private static Answer<Future<Void>> successAnswer() {
|
|
return invocation -> {
|
|
for (Object a : invocation.getArguments()) {
|
|
ReferenceCountUtil.safeRelease(a);
|
|
}
|
|
|
|
return ImmediateEventExecutor.INSTANCE.newSucceededFuture(null);
|
|
};
|
|
}
|
|
|
|
private static Answer<Future<Void>> noopAnswer() {
|
|
return new Answer<Future<Void>>() {
|
|
@Override
|
|
public Future<Void> answer(InvocationOnMock invocation) throws Throwable {
|
|
for (Object a : invocation.getArguments()) {
|
|
if (a instanceof Promise) {
|
|
return ((Promise<Void>) a).asFuture();
|
|
}
|
|
}
|
|
return newPromise().asFuture();
|
|
}
|
|
};
|
|
}
|
|
|
|
private static Promise<Void> newPromise() {
|
|
return ImmediateEventExecutor.INSTANCE.newPromise();
|
|
}
|
|
|
|
private static ByteBuf data() {
|
|
ByteBuf buf = Unpooled.buffer(10);
|
|
for (int i = 0; i < buf.writableBytes(); i++) {
|
|
buf.writeByte(i);
|
|
}
|
|
return buf;
|
|
}
|
|
}
|