/*
* Copyright 2014 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.handler.codec.http.websocketx.extensions.compression;
import static org.junit.Assert.*;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.handler.codec.compression.ZlibCodecFactory;
import io.netty.handler.codec.compression.ZlibWrapper;
import io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame;
import io.netty.handler.codec.http.websocketx.ContinuationWebSocketFrame;
import io.netty.handler.codec.http.websocketx.extensions.WebSocketExtension;
import java.util.Arrays;
import java.util.Random;
import org.junit.Test;
public class PerMessageDeflateDecoderTest {
private static final Random random = new Random();
@Test
public void testCompressedFrame() {
EmbeddedChannel encoderChannel = new EmbeddedChannel(
ZlibCodecFactory.newZlibEncoder(ZlibWrapper.NONE, 9, 15, 8));
EmbeddedChannel decoderChannel = new EmbeddedChannel(new PerMessageDeflateDecoder(false));
// initialize
byte[] payload = new byte[300];
random.nextBytes(payload);
encoderChannel.writeOutbound(Unpooled.wrappedBuffer(payload));
ByteBuf compressedPayload = encoderChannel.readOutbound();
BinaryWebSocketFrame compressedFrame = new BinaryWebSocketFrame(true,
WebSocketExtension.RSV1 | WebSocketExtension.RSV3,
compressedPayload.slice(0, compressedPayload.readableBytes() - 4));
// execute
decoderChannel.writeInbound(compressedFrame);
BinaryWebSocketFrame uncompressedFrame = decoderChannel.readInbound();
// test
assertNotNull(uncompressedFrame);
assertNotNull(uncompressedFrame.content());
assertTrue(uncompressedFrame instanceof BinaryWebSocketFrame);
assertEquals(WebSocketExtension.RSV3, uncompressedFrame.rsv());
assertEquals(300, uncompressedFrame.content().readableBytes());
byte[] finalPayload = new byte[300];
uncompressedFrame.content().readBytes(finalPayload);
assertTrue(Arrays.equals(finalPayload, payload));
uncompressedFrame.release();
}
@Test
public void testNormalFrame() {
EmbeddedChannel decoderChannel = new EmbeddedChannel(new PerMessageDeflateDecoder(false));
// initialize
byte[] payload = new byte[300];
random.nextBytes(payload);
BinaryWebSocketFrame frame = new BinaryWebSocketFrame(true,
WebSocketExtension.RSV3, Unpooled.wrappedBuffer(payload));
// execute
decoderChannel.writeInbound(frame);
BinaryWebSocketFrame newFrame = decoderChannel.readInbound();
// test
assertNotNull(newFrame);
assertNotNull(newFrame.content());
assertTrue(newFrame instanceof BinaryWebSocketFrame);
assertEquals(WebSocketExtension.RSV3, newFrame.rsv());
assertEquals(300, newFrame.content().readableBytes());
byte[] finalPayload = new byte[300];
newFrame.content().readBytes(finalPayload);
assertTrue(Arrays.equals(finalPayload, payload));
newFrame.release();
}
@Test
public void testFramementedFrame() {
EmbeddedChannel encoderChannel = new EmbeddedChannel(
ZlibCodecFactory.newZlibEncoder(ZlibWrapper.NONE, 9, 15, 8));
EmbeddedChannel decoderChannel = new EmbeddedChannel(new PerMessageDeflateDecoder(false));
// initialize
byte[] payload = new byte[300];
random.nextBytes(payload);
encoderChannel.writeOutbound(Unpooled.wrappedBuffer(payload));
ByteBuf compressedPayload = encoderChannel.readOutbound();
compressedPayload = compressedPayload.slice(0, compressedPayload.readableBytes() - 4);
int oneThird = compressedPayload.readableBytes() / 3;
BinaryWebSocketFrame compressedFrame1 = new BinaryWebSocketFrame(false,
WebSocketExtension.RSV1 | WebSocketExtension.RSV3,
compressedPayload.slice(0, oneThird));
ContinuationWebSocketFrame compressedFrame2 = new ContinuationWebSocketFrame(false,
WebSocketExtension.RSV3, compressedPayload.slice(oneThird, oneThird));
ContinuationWebSocketFrame compressedFrame3 = new ContinuationWebSocketFrame(true,
WebSocketExtension.RSV3, compressedPayload.slice(oneThird * 2,
compressedPayload.readableBytes() - oneThird * 2));
// execute
decoderChannel.writeInbound(compressedFrame1.retain());
decoderChannel.writeInbound(compressedFrame2.retain());
decoderChannel.writeInbound(compressedFrame3);
BinaryWebSocketFrame uncompressedFrame1 = decoderChannel.readInbound();
ContinuationWebSocketFrame uncompressedFrame2 = decoderChannel.readInbound();
ContinuationWebSocketFrame uncompressedFrame3 = decoderChannel.readInbound();
// test
assertNotNull(uncompressedFrame1);
assertNotNull(uncompressedFrame2);
assertNotNull(uncompressedFrame3);
assertEquals(WebSocketExtension.RSV3, uncompressedFrame1.rsv());
assertEquals(WebSocketExtension.RSV3, uncompressedFrame2.rsv());
assertEquals(WebSocketExtension.RSV3, uncompressedFrame3.rsv());
ByteBuf finalPayloadWrapped = Unpooled.wrappedBuffer(uncompressedFrame1.content(),
uncompressedFrame2.content(), uncompressedFrame3.content());
assertEquals(300, finalPayloadWrapped.readableBytes());
byte[] finalPayload = new byte[300];
finalPayloadWrapped.readBytes(finalPayload);
assertTrue(Arrays.equals(finalPayload, payload));
finalPayloadWrapped.release();
}
@Test
public void testMultiCompressedPayloadWithinFrame() {
EmbeddedChannel encoderChannel = new EmbeddedChannel(
ZlibCodecFactory.newZlibEncoder(ZlibWrapper.NONE, 9, 15, 8));
EmbeddedChannel decoderChannel = new EmbeddedChannel(new PerMessageDeflateDecoder(false));
// initialize
byte[] payload1 = new byte[100];
random.nextBytes(payload1);
byte[] payload2 = new byte[100];
random.nextBytes(payload2);
encoderChannel.writeOutbound(Unpooled.wrappedBuffer(payload1));
ByteBuf compressedPayload1 = encoderChannel.readOutbound();
encoderChannel.writeOutbound(Unpooled.wrappedBuffer(payload2));
ByteBuf compressedPayload2 = encoderChannel.readOutbound();
BinaryWebSocketFrame compressedFrame = new BinaryWebSocketFrame(true,
WebSocketExtension.RSV1 | WebSocketExtension.RSV3,
Unpooled.wrappedBuffer(
compressedPayload1,
compressedPayload2.slice(0, compressedPayload2.readableBytes() - 4)));
// execute
decoderChannel.writeInbound(compressedFrame);
BinaryWebSocketFrame uncompressedFrame = decoderChannel.readInbound();
// test
assertNotNull(uncompressedFrame);
assertNotNull(uncompressedFrame.content());
assertTrue(uncompressedFrame instanceof BinaryWebSocketFrame);
assertEquals(WebSocketExtension.RSV3, uncompressedFrame.rsv());
assertEquals(200, uncompressedFrame.content().readableBytes());
byte[] finalPayload1 = new byte[100];
uncompressedFrame.content().readBytes(finalPayload1);
assertTrue(Arrays.equals(finalPayload1, payload1));
byte[] finalPayload2 = new byte[100];
uncompressedFrame.content().readBytes(finalPayload2);
assertTrue(Arrays.equals(finalPayload2, payload2));
uncompressedFrame.release();
}
}