Motiviation:
Commit f45d754 from 4.1 was directly merged but interfaces were not updated.
Modifications:
- Fix areas where interfaces have changed between 4.1 and master
Result:
No more compile error.
Motivation:
Adding an example that showcases Netty’s HTTP/2 codec and that is
slightly more complex than the existing hello-world example. It is
based on the Gopher tiles example available here:
https://http2.golang.org/gophertiles?latency=0
Modifications:
Moved current http2 example to http2/helloworld.
Added http2 tiles example under http2/tiles.
Result:
A Netty tiles example is available.
Motiviation:
The HTTP/2 server example just hangs when a client is using only HTTP with no ALPN or upgrade attempts. We should still send some kind of response.
Modifications:
The HTTP/2 server example has a special handler to detect no upgrade HTTP clients and generate a response.
Result:
Clients that just use HTTP with no upgrade will no appear hung when interacting with the HTTP/2 server example.
Motiviation:
When tried to allocate tiny and small sized and failed to serve these out of the PoolSubPage we exit the synchronization
block just to enter it again when call allocateNormal(...).
Modification:
Not exit the synchronized block until allocateNormal(...) is done.
Result:
Better performance.
Motivation:
At the moment hostname verification is not supported with OpenSSLEngine.
Modifications:
- Allow to create OpenSslEngine with peerHost and peerPort informations.
- Respect endPointIdentificationAlgorithm and algorithmConstraints when set and get SSLParamaters.
Result:
hostname verification is supported now.
Motiviation:
The Http2ConnectionHandler is incrementing the reference count in the goAway method for the debugData buffer after it has already been sent and maybe consumed. This may result in an IllegalRefCountException to be thrown. The unit tests also encounter buffer leaks because they have not been updated to invoke the listener which releases the buffer in the goAway method.
Modifications:
- The retain() call should be before the frameWriter().writeGoAway(...) call
- The unit tests which call goAway must also invoke the operationComplete(..) method for the listener.
Result:
No IllegalRefCountException. Less buffer leaks in tests.
Motivation:
* Path attribute should be null, not empty String, if it's passed as "Path=".
* Only extract attribute value when the name is recognized.
* Only extract Expires attribute value String if MaxAge is undefined as it has precedence.
Modification:
Modify ClientCookieDecoder.
Add "testIgnoreEmptyPath" test in ClientCookieDecoderTest.
Result:
More idyomatic Path behavior (like Domain).
Minor performance improvement in some corner cases.
Motivation:
keyManager() is required on server-side, and so there is a forServer()
method for each override of keyManager(). However, one of the
forServer() overrides was missing, which meant that if you wanted to use
a KeyManagerFactory you were forced to provide garbage configuration
just to get past null checks.
Modifications:
Add missing override.
Result:
No hacks to use SslContextBuilder on server-side with KeyManagerFactory.
Resolves#3775
Motivation:
New versions of compression libraries, which improve their performance and fix some bugs.
Modifications:
Updated versions of jzlib, compress-lzf, lz4 and commons-compres libraries.
Result:
Better stability and performance of compression codecs.
Motivations:
When using HttpPostRequestEncoder and trying to set an attribute if a
charset is defined, currenlty implicit Charset.toStrng() is used, given
wrong format.
As in Android for UTF-16 = "com.ibm.icu4jni.charset.CharsetICU[UTF-16]".
Modifications:
Each time charset is used to be printed as its name, charset.name() is
used to get the canonical name.
Result:
Now get "UTF-16" instead.
(3.10 version)
Motivation:
RFC6265 specifies which characters are allowed in a cookie name and value.
Netty is currently too lax, which can used for HttpOnly escaping.
Modification:
In ServerCookieDecoder: discard cookie key-value pairs that contain invalid characters.
In ClientCookieEncoder: throw an exception when trying to encode cookies with invalid characters.
Drop old Cookie encoders and decoders that were deprecated in 4.1.
Result:
The problem described in the motivation section is fixed.
Motivation:
There is an error in the ByteString test logic which is resulting in test failures.
Modifications:
- Fix the loop iteration to use the loop iteration variable instead of a fixed index.
Result:
Tests are less buggy.
Motivation:
Examples that are using ALPN/NPN are using a failure mode which is not supported by the JDK SslProvider. The examples fail to run and throw an exception if the JDK SslProvider is used.
Modifications:
- Use SelectorFailureBehavior.NO_ADVERTISE
- Use SelectedListenerFailureBehavior.ACCEPT
Result:
Examples can be run with both OpenSsl and JDK SslProviders.
Motivation:
Using factory methods of SslContext is deprecated. Code should be using
SslContextBuilder instead. This would have been done when the old
methods were deprecated, but memcache and http2 examples didn't exist in
the 4.0 branch which the PR was against.
Modifications:
Swap to the new construction pattern.
Result:
No more deprecated warnings during build of examples. Users are
instructed to use the new pattern.
Motivation:
If headers are sent on a stream that does not yet exist and the END_STREAM flag is set we will send a RST_STREAM frame. We should send the HEADERS frame and no RST_STREAM.
Modifications:
DefaultHttp2RemoteFlowController should allow frames to be sent if stream is created in the 'half closed (local)' state.
Result:
We can send HEADERS frame with the END_STREAM flag sent without sending a RST_STREAM frame.
Motivation:
There were a few outstanding comments that were left unaddressed after committing the changes for #3749.
Modifications:
Changes to Http2ConnectionHandler.goAway():
- Retaining the debugData buffer, rather than always converting it to a string immediately.
- Changing log level for sending a GOAWAY with error to debug.
Result:
Remaining comments from #3749 are addressed.
Motivation:
To prevent from DOS attacks it can be useful to disable remote initiated renegotiation.
Modifications:
Add new flag to OpenSslContext that can be used to disable it
Adding a testcase
Result:
Remote initiated renegotion requests can be disabled now.
Motivation:
The way of firstIndexOf and lastIndexOf iterating the ByteBuf is similar to forEachByte and forEachByteDesc, but have many range checks.
Modifications:
Use forEachByte and a IndexOfProcessor to find occurrence.
Result:
eliminate range checks
Motivation:
NioUdtByteAcceptorChannel and NioUdtMessageAcceptorChannel have almost same code.
For maintainability, it's better to remove it.
Motification:
- Pulled a member(METADATA) and methods(doReadMessage() and metadata() up.
- Added newConnectorChannel().
Result:
Cleaner code.
Motivation:
Currently the graceful shutdown of the HTTP/2 connection waits until there are no active streams. There may be use cases that buffer stream creation (due to limits imposed by MAX_CONCURRENT_STREAMS), in which case they may still want those streams to complete before closing.
Modifications:
Added a isGracefulShutdownComplete method to Http2ConnectionHandler, which can be overridden by a subclass.
Result:
Graceful shutdown logic can be overridden.
Motivation:
In the SslHandler we schedule a timeout at which we close the Channel if a timeout was detected during close_notify. Because this can race with notify the flushFuture we can see an IllegalStateException when the Channel is closed.
Modifications:
- Use a trySuccess() and tryFailure(...) to guard against race.
Result:
No more race.
Motivation:
We should not trigger channelWritabilityChanged during failing message when we are about to close the Channel as otherwise the use may try again writing even if the Channel is about to get closed.
Modifications:
Add new boolean param to ChannelOutboundBuffer.failFlushed(...) which allows to specify if we should notify or not.
Result:
channelWritabilityChanged is not triggered anymore if we cloe the Channel because of an IOException during write.
Motivation:
Previously, we deferred the closing of the Channel when we were flushing. This is problematic as this means that if the user adds a ChannelFutureListener, that will close the Channel, the closing will not happen until we are done with flushing. This can lead to more data is sent than expected.
Modifications:
- Do not defer closing when in flush
Result:
Correctly respect order of events and closing the Channel ASAP
Motivation:
channelUDT() can't handle NioUdtByteRendezvousChannel and NioUdtMessageRendezvousChannel because those are handled by the checking condition of their parent.
Motification:
Reorder checking conditions.
Result:
Bugfixed.
Motivation:
The semantic of LocalChannel.doWrite(...) were a bit off as it notified the ChannelFuture before the data was actual moved to the peer buffer.
Modifications:
- Use our MPSC queue as inbound buffer
- Directly copy to data to the inbound buffer of the peer and either success or fail the promise after each copy.
Result:
Correct semantic and less memory copies.
Motivation:
Currently mutual auth is not supported when using OpenSslEngine.
Modification:
- Add support to OpenSslClientContext
- Correctly throw SSLHandshakeException when an error during handshake is detected
Result:
Mutual auth can be used with OpenSslEngine
Motivation:
When EPOLLRDHUP is received we need to try to read at least one time to ensure
that we read all pending data from the socket. Otherwise we may loose data.
Modifications:
- Ensure we read all data from socket
- Ensure file descriptor is closed on doClose() even if doDeregister() throws an Exception.
- Only handle either EPOLLRDHUP or EPOLLIN as only one is needed to detect connection reset.
Result:
No more data loss on connection reset.
Motivation:
When using epoll_ctl we should respect the return value and do the right thing depending on it.
Modifications:
Adjust java and native code to respect epoll_ctl return values.
Result:
Correct and cleaner code.
Motiviation:
If user events or excpetions reach the tail end of the pipeline they are not released. This could result in buffer leaks.
Motivation:
- Use the ReferenceCountUtil.release to release objects for the userEventTriggered and exceptionCaught methods on DefaultChannelPipeline
Result:
2 less areas where buffer leaks can occur.
Motivation:
Because we tried to grab the SSL renegotation future to early we could see test-failures.
Modifications:
Access the future at the correct time.
Result:
No more test-failures.
Motivation:
All read operations should be safe to execute from multiple threads which was not the case and so could produce a livelock.
Modifications:
Modify methods so these are safe to be called from multiple threads.
Result:
No more livelock.
Motivation:
If the client closes, a GOWAY is sent with a lastKnownStream of zero (since the remote side never created a stream). If there is still an exchange in progress, inbound frames for streams created by the client will be ignored because our ignore logic doesn't check to see if the stream was created by the remote endpoint. Frames for streams created by the local endpoint should continue to come through after sending GOAWAY.
Modifications:
Changed the decoder's streamCreatedAfterGoAwaySent logic to properly ensure that the stream was created remotely.
Result:
We now propertly process frames received after sending GOAWAY.
Motivation:
The isDone method is currently broken in the aggregator because the doneAllocatingPromises accidentally calls the overridden version of setSuccess, rather than calling the base class version. This causes the base class's version to never be called since allowNotificationEvent will evaluate to false. This means that setSuccess0 will never be set, resulting in isDone always returning false.
Modifications:
Changed setSuccess() to call the base class when appropriate, regardless of the result of allowNotificationEvent.
Result:
isDone now behaves properly for the promise aggregator.
Modifications:
- Add jetty.npn.version.latest and jetty.alpn.version.latest7/8
- Add npn-alpn-7 profile
- Use the *.latest7/8 version properties in alpn-8 and npn-alpn-7
- Add more profiles for newer JDK versions
- Reorder profiles
Motivation:
ResourceLeak.close() must be called when a reference-counted resource is
deallocated, but AbstractDnsMessage.deallocate() forgot to call it.
Modifications:
Call ResourceLeak.close() for the tracked AbstractDnsMessage instances
Result:
Fix the false resource leak warnings
Motivation:
The current heap dump compression preset (9) requires way too much
memory (768 MiB at maximum for dictionary), resulting in OOME in many
cases.
Modifications:
- Use the default preset (6) which uses 8 MiB dictionary.
- Do not fail abruptly even when OOME has been raised.
Result:
More stable heap dump acquisition
Motivation:
The SSL peer who did not initiate renegotiation sometimes does not get
the notification for renegotition due to an unknown reason.
Modification:
Until the exact cause is understood, relax the assertions of the flaky
tests.
Result:
Build stability
Motivation:
There are various known issues in netty-codec-dns:
- Message types are not interfaces, which can make it difficult for a
user to implement his/her own message implementation.
- Some class names and field names do not match with the terms in the
RFC.
- The support for decoding a DNS record was limited. A user had to
encode and decode by him/herself.
- The separation of DnsHeader from DnsMessage was unnecessary, although
it is fine conceptually.
- Buffer leak caused by DnsMessage was difficult to analyze, because the
leak detector tracks down the underlying ByteBuf rather than the
DnsMessage itself.
- DnsMessage assumes DNS-over-UDP.
- To send an EDNS message, a user have to create a new DNS record class
instance unnecessarily.
Modifications:
- Make all message types interfaces and add default implementations
- Rename some classes, properties, and constants to match the RFCs
- DnsResource -> DnsRecord
- DnsType -> DnsRecordType
- and many more
- Remove DnsClass and use an integer to support EDNS better
- Add DnsRecordEncoder/DnsRecordDecoder and their default
implementations
- DnsRecord does not require RDATA to be ByteBuf anymore.
- Add DnsRawRecord as the catch-all record type
- Merge DnsHeader into DnsMessage
- Make ResourceLeakDetector track AbstractDnsMessage
- Remove DnsMessage.sender/recipient properties
- Wrap DnsMessage with AddressedEnvelope
- Add DatagramDnsQuest and DatagramDnsResponse for ease of use
- Rename DnsQueryEncoder to DatagramDnsQueryEncoder
- Rename DnsResponseDecoder to DatagramDnsResponseDecoder
- Miscellaneous changes
- Add StringUtil.TAB
Result:
- Cleaner APi
- Can support DNS-over-TCP more easily in the future
- Reduced memory footprint in the default DnsQuery/Response
implementations
- Better leak tracking for DnsMessages
- Possibility to introduce new DnsRecord types in the future and provide
full record encoder/decoder implementation.
- No unnecessary instantiation for an EDNS pseudo resource record
Motivation:
Allow users of HTTP2 to control when flushes occur so they can optimize network writes.
Modifications:
Removed explicit calls to flush in encoder, decoder & flow-controller
Connection handler now calls flush on read-complete to enable batching writes in response to reads
Result:
Much less flushing occurs for normal HTTP2 request and response patterns.
Motivation:
Right now the used hpack dependency does not contain a valid osgi manifest.
Modifications:
Upgrade hpack from 0.10.1 to 0.11.0.
Result:
hpack dependency works in osgi containers without wrapping.
