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Bugfix #9257: WebSocketProtocolHandler does NOT support autoRead=false (#9258)

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Motivation:

I need to control WebSockets inbound flow manually, when autoRead=false

Modification:

Add missed ctx.read() call into WebSocketProtocolHandler, where read request has been swallowed.

Result:

Fixes #9257
This commit is contained in:
ursa 2019-06-24 08:07:57 +01:00 committed by Norman Maurer
parent 9b37be9550
commit a05adceae8
2 changed files with 70 additions and 2 deletions
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8
codec-http/src/main/java/io/netty/handler/codec/http/websocketx/WebSocketProtocolHandler.java
View File

@ -48,15 +48,23 @@ abstract class WebSocketProtocolHandler extends MessageToMessageDecoder<WebSocke
if (frame instanceof PingWebSocketFrame) {
frame.content().retain();
ctx.channel().writeAndFlush(new PongWebSocketFrame(frame.content()));
readIfNeeded(ctx);
return;
}
if (frame instanceof PongWebSocketFrame && dropPongFrames) {
readIfNeeded(ctx);
return;
}
out.add(frame.retain());
}
private static void readIfNeeded(ChannelHandlerContext ctx) {
if (!ctx.channel().config().isAutoRead()) {
ctx.read();
}
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
ctx.fireExceptionCaught(cause);

64
codec-http/src/test/java/io/netty/handler/codec/http/websocketx/WebSocketProtocolHandlerTest.java
View File

@ -19,9 +19,10 @@ package io.netty.handler.codec.http.websocketx;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.util.CharsetUtil;
import io.netty.handler.flow.FlowControlHandler;
import org.junit.Test;
import static io.netty.util.CharsetUtil.UTF_8;
import static org.junit.Assert.*;
/**
@ -31,7 +32,7 @@ public class WebSocketProtocolHandlerTest {
@Test
public void testPingFrame() {
ByteBuf pingData = Unpooled.copiedBuffer("Hello, world", CharsetUtil.UTF_8);
ByteBuf pingData = Unpooled.copiedBuffer("Hello, world", UTF_8);
EmbeddedChannel channel = new EmbeddedChannel(new WebSocketProtocolHandler() { });
PingWebSocketFrame inputMessage = new PingWebSocketFrame(pingData);
@ -45,6 +46,65 @@ public class WebSocketProtocolHandlerTest {
assertFalse(channel.finish());
}
@Test
public void testPingPongFlowControlWhenAutoReadIsDisabled() {
String text1 = "Hello, world #1";
String text2 = "Hello, world #2";
String text3 = "Hello, world #3";
String text4 = "Hello, world #4";
EmbeddedChannel channel = new EmbeddedChannel();
channel.config().setAutoRead(false);
channel.pipeline().addLast(new FlowControlHandler());
channel.pipeline().addLast(new WebSocketProtocolHandler() { });
// When
assertFalse(channel.writeInbound(
new PingWebSocketFrame(Unpooled.copiedBuffer(text1, UTF_8)),
new TextWebSocketFrame(text2),
new TextWebSocketFrame(text3),
new PingWebSocketFrame(Unpooled.copiedBuffer(text4, UTF_8))
));
// Then - no messages were handled or propagated
assertNull(channel.readInbound());
assertNull(channel.readOutbound());
// When
channel.read();
// Then - pong frame was written to the outbound
PongWebSocketFrame response1 = channel.readOutbound();
assertEquals(text1, response1.content().toString(UTF_8));
// And - one requested message was handled and propagated inbound
TextWebSocketFrame message2 = channel.readInbound();
assertEquals(text2, message2.text());
// And - no more messages were handled or propagated
assertNull(channel.readInbound());
assertNull(channel.readOutbound());
// When
channel.read();
// Then - one requested message was handled and propagated inbound
TextWebSocketFrame message3 = channel.readInbound();
assertEquals(text3, message3.text());
// And - no more messages were handled or propagated
// Precisely, ping frame 'text4' was NOT read or handled.
// It would be handle ONLY on the next 'channel.read()' call.
assertNull(channel.readInbound());
assertNull(channel.readOutbound());
// Cleanup
response1.release();
message2.release();
message3.release();
assertFalse(channel.finish());
}
@Test
public void testPongFrameDropFrameFalse() {
EmbeddedChannel channel = new EmbeddedChannel(new WebSocketProtocolHandler(false) { });