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QpackEncoder.encode should take buffer to encode into instead of allocating. 

Signed-off-by: Lachlan Roberts <lachlan@webtide.com>
This commit is contained in:
Lachlan Roberts 2021-05-05 17:03:38 +10:00 committed by Simone Bordet
parent 0ccb826532
commit 5cde0ca7c8
3 changed files with 12 additions and 28 deletions
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27
jetty-http3/http3-qpack/src/main/java/org/eclipse/jetty/http3/qpack/QpackEncoder.java
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@ -36,8 +36,6 @@ import org.eclipse.jetty.http3.qpack.internal.parser.EncoderInstructionParser;
import org.eclipse.jetty.http3.qpack.internal.table.DynamicTable;
import org.eclipse.jetty.http3.qpack.internal.table.Entry;
import org.eclipse.jetty.http3.qpack.internal.util.NBitIntegerEncoder;
import org.eclipse.jetty.io.ByteBufferPool;
import org.eclipse.jetty.io.NullByteBufferPool;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.component.Dumpable;
import org.slf4j.Logger;
@ -83,27 +81,19 @@ public class QpackEncoder implements Dumpable
void onInstruction(Instruction instruction) throws QpackException;
}
private final ByteBufferPool _bufferPool;
private final Handler _handler;
private final QpackContext _context;
private final int _maxBlockedStreams;
private final Map<Integer, StreamInfo> _streamInfoMap = new HashMap<>();
private final EncoderInstructionParser _parser;
private int _knownInsertCount;
private int _knownInsertCount = 0;
private int _blockedStreams = 0;
public QpackEncoder(Handler handler, int maxBlockedStreams)
{
this(handler, maxBlockedStreams, new NullByteBufferPool());
}
public QpackEncoder(Handler handler, int maxBlockedStreams, ByteBufferPool bufferPool)
{
_handler = handler;
_bufferPool = bufferPool;
_context = new QpackContext();
_maxBlockedStreams = maxBlockedStreams;
_knownInsertCount = 0;
_parser = new EncoderInstructionParser(new EncoderAdapter());
}
@ -115,7 +105,6 @@ public class QpackEncoder implements Dumpable
/**
* Set the capacity of the DynamicTable and send a instruction to set the capacity on the remote Decoder.
* @param capacity the new capacity.
* @throws QpackException
*/
public void setCapacity(int capacity) throws QpackException
{
@ -180,7 +169,7 @@ public class QpackEncoder implements Dumpable
}
}
public ByteBuffer encode(int streamId, MetaData metadata) throws QpackException
public void encode(ByteBuffer buffer, int streamId, MetaData metadata) throws QpackException
{
// Verify that we can encode without errors.
if (metadata.getFields() != null)
@ -234,16 +223,7 @@ public class QpackEncoder implements Dumpable
deltaBase = signBit ? requiredInsertCount - base - 1 : base - requiredInsertCount;
}
// Calculate the size required. TODO: it may be more efficient to just use a buffer of MAX_HEADER_SIZE?
int spaceRequired = 0;
spaceRequired += 1 + NBitIntegerEncoder.octectsNeeded(8, encodedInsertCount);
spaceRequired += 1 + NBitIntegerEncoder.octectsNeeded(7, deltaBase);
for (EncodableEntry encodableEntry : encodableEntries)
{
spaceRequired += encodableEntry.getRequiredSize(base);
}
ByteBuffer buffer = _bufferPool.acquire(spaceRequired, false);
// Encode all the entries into the buffer.
int pos = BufferUtil.flipToFill(buffer);
// Encode the Field Section Prefix into the ByteBuffer.
@ -258,7 +238,6 @@ public class QpackEncoder implements Dumpable
}
BufferUtil.flipToFlush(buffer, pos);
return buffer;
}
private EncodableEntry encode(StreamInfo streamInfo, HttpField field) throws QpackException

5
jetty-http3/http3-qpack/src/test/java/org/eclipse/jetty/http3/qpack/EncodeDecodeTest.java
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@ -77,7 +77,8 @@ public class EncodeDecodeTest
int streamId = 0;
HttpFields httpFields = HttpFields.build().add(":path", "/index.html");
ByteBuffer buffer = _encoder.encode(streamId, new MetaData(HttpVersion.HTTP_3, httpFields));
ByteBuffer buffer = BufferUtil.allocate(1024);
_encoder.encode(buffer, streamId, new MetaData(HttpVersion.HTTP_3, httpFields));
assertNull(_encoderHandler.getInstruction());
assertThat(BufferUtil.toHexString(buffer), QpackTestUtil.equalsHex("0000 510b 2f69 6e64 6578 2e68 746d 6c"));
assertTrue(_encoderHandler.isEmpty());
@ -107,7 +108,7 @@ public class EncodeDecodeTest
httpFields = HttpFields.build()
.add(":authority", "www.example.com")
.add(":path", "/sample/path");
buffer = _encoder.encode(streamId, new MetaData(HttpVersion.HTTP_3, httpFields));
_encoder.encode(buffer, streamId, new MetaData(HttpVersion.HTTP_3, httpFields));
instruction = _encoderHandler.getInstruction();
assertThat(instruction, instanceOf(IndexedNameEntryInstruction.class));

6
jetty-http3/http3-qpack/src/test/java/org/eclipse/jetty/http3/qpack/EvictionTest.java
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@ -20,6 +20,7 @@ import org.eclipse.jetty.http.HttpField;
import org.eclipse.jetty.http.HttpFields;
import org.eclipse.jetty.http.HttpVersion;
import org.eclipse.jetty.http.MetaData;
import org.eclipse.jetty.util.BufferUtil;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
@ -58,12 +59,14 @@ public class EvictionTest
public void test() throws Exception
{
_encoder.setCapacity(1024);
ByteBuffer encodedFields = BufferUtil.allocate(1024);
for (int i = 0; i < 10000; i++)
{
HttpFields httpFields = newRandomFields(5);
int streamId = getPositiveInt(10);
ByteBuffer encodedFields = _encoder.encode(streamId, new MetaData(HttpVersion.HTTP_3, httpFields));
_encoder.encode(encodedFields, streamId, new MetaData(HttpVersion.HTTP_3, httpFields));
_decoder.decode(streamId, encodedFields);
MetaData result = _decoderHandler.getMetaData();
@ -77,6 +80,7 @@ public class EvictionTest
// System.err.println();
assertTrue(result.getFields().isEqualTo(httpFields));
BufferUtil.clear(encodedFields);
}
}