Motivation:
PriorityStreamByteDistributor is now obsolete and can be replaced by WeightedFairQueueByteDistributor.
Modifications:
- Remove PriorityStreamByteDistributor and use WeightedFairQueueByteDistributor by default.
Result:
PriorityStreamByteDistributor no longer has to be maintained and is replaced by a better algorithm.
Motivation:
DefaultHttp2RemoteFlowController.ListenerWritabilityMonitor no longer reliably detects when a stream's writability change occurs.
Modifications:
- Ensure writiability is reliabily reported by DefaultHttp2RemoteFlowController.ListenerWritabilityMonitor
- Fix infinite loop issue (https://github.com/netty/netty/issues/4588) detected when consolidating unit tests
Result:
Reliable stream writability change notification, and 1 less infinite loop in UniformStreamByteDistributor.
Fixes https://github.com/netty/netty/issues/4587
Motivation:
The fix for https://github.com/netty/netty/issues/3884 breaks SctpEchoTest because Selector.select will always return 0 if you do not clear last selectedKeys.
Modifications:
Clear readSelector.selectedKeys() if it is not empty.
Result:
SctpEchoTest is green again.
Motivation:
DomainNameMapping.add() makes DomainNameMapping look like it's safe to call add() anytime, and this is never true. It's probably better deprecate add() and introduce DomainNameMappingBuilder.
Modifications:
Made an immutable implementation of DomainNameMapping;
Added Builder for immutable DomainNameMapping;
Replaced regex pattern with String::startsWith check;
Replaced HashMap with two arrays in ImmutableDomainNameMapping;
Deprecated mutable API;
Estimation for StringBuilder initial size in ImmutableDomainNameMapping#toString()
Added StringUtil#commonSuffixOfLength
Replaced unnecessary substrings creation in DomainNameMapping#matches with regionMatches
Result:
Clients will be able to create immutable instances of DomainNameMapping with builder API.
Motivation:
UTF-16 can not represent the full range of Unicode characters, and thus has the concept of Surrogate Pair (http://unicode.org/glossary/#surrogate_pair) where 2 16-bit code units can be used to represent the missing characters. ByteBufUtil.writeUtf8 is currently does not support this and is thus incomplete.
Modifications:
- Add support for surrogate pairs in ByteBufUtil.writeUtf8
Result:
ByteBufUtil.writeUtf8 now supports surrogate pairs and is correctly converting to UTF-8.
Motivation:
We should not use Unpooled to allocate buffers for performance reasons.
Modifications:
Allow to pass in ByteBufAllocate which is used to allocate buffers or use the allocate of the src buffer.
Result:
Better performance if the PooledByteBufAllocator is used.
Motivation:
We need to ensure we not add a newline if the Base64 encoded buffer ends directly on the MAX_LINE_LENGTH. If we miss to do so this produce invalid data.
Because of this bug OpenSslServerContext and OpenSslClientContext may fail to load a cert.
Modifications:
- Only add NEW_LINE if we not are on the end of the dst buffer.
- Add unit test
Result:
Correct result in all cases
Motivation:
The `NoPriorityByteDistibbutionBenchmark` was broken with a recent commit.
Modifications:
Fixed the benchmark to use the new HTTP2 handler builder.
Result:
It builds.
Motivation:
We have websocket extension support (with compression) in old master. We should port this to 4.1
Modifications:
Backport relevant code.
Result:
websocket extension support (with compression) is now in 4.1.
Related: #4572#4574
Motivation:
Consistency in our builder API design
Modifications:
- Add AbstractInboundHttp2ToHttpAdapterBuilder
- Replace the old 'Builder's with InboundHttp2ToHttpAdapterBuilder and
InboundHttp2ToHttpPriorityAdapterBuilder
Result:
Builder API consistency
Motivation:
Consistency in API design
Modifications:
- Deprecate CorsConfig.Builder and its factory methods
- Deprecate CorsConfig.DateValueGenerator
- Add CorsConfigBuilder and its factory methods
- Fix typo (curcuit -> circuit)
Result:
Consistency with other builder APIs such as SslContextBuilder and
Http2ConnectionHandlerBuilder
Related: #4470#4473
Motivation:
A user might want to:
- implement dynamic mapping from hostname to SslContext
- server large number of domain names whose SslContext can be
initialized lazily and destroyed when unused
Modifications:
- Let SniHandler accept Mapping<String, SslContext> as well as
DomainNameMapping
- Make the default constructor of SslContext so that a user can create
his or her own SslContext wrapper
Result:
Flexibility
Motivation:
PriorityStreamByteDistributor uses a homegrown algorithm which distributes bytes to nodes in the priority tree. PriorityStreamByteDistributor has no concept of goodput which may result in poor utilization of network resources. PriorityStreamByteDistributor also has performance issues related to the tree traversal approach and number of nodes that must be visited. There also exists some more proven algorithms from the resource scheduling domain which PriorityStreamByteDistributor does not employ.
Modifications:
- Introduce a new ByteDistributor which uses elements from weighted fair queue schedulers
Result:
StreamByteDistributor which is sensitive to priority and uses a more familiar distribution concept.
Fixes https://github.com/netty/netty/issues/4462
Motivation:
On contrary to `DefaultNameResolver`, `DnsNameResolver` doesn't currently honor hosts file.
Modifications:
* Introduce `HostsFileParser` that parses `/etc/hosts` or `C:\Windows\system32\drivers\etc\hosts` depending on the platform
* Introduce `HostsFileEntriesResolver` that uses the former to resolve host names
* Make `DnsNameResolver` check his `HostsFileEntriesResolver` prior to trying to resolve names against the DNS server
* Introduce `DnsNameResolverBuilder` so we now have a builder for `DnsNameResolver`s
* Additionally introduce a `CompositeNameResolver` that takes several `NameResolver`s and tries to resolve names by delegating sequentially
* Change `DnsNameResolver.asAddressResolver` to return a composite and honor hosts file
Result:
Hosts file support when using `DnsNameResolver`.
Consistent behavior with JDK implementation.
Motivation:
We missed to check if the dst is ready only before using unsafe to copy data into it which lead to data-corruption. We need to ensure we respect ready only ByteBuffer.
Modifications:
- Correctly check if the dst is ready only before copy data into it in UnsafeByteBufUtil
- Also make it work for buffers that are not direct and not have an array
Result:
No more data corruption possible if the dst buffer is readonly and unsafe buffer implementation is used.
Motivation:
We currently not supported using KeyManagerFactory with OpenSslServerContext and so should throw an exception if the user tries to do so. This will at least not give suprising and hard to debug problems later.
Modifications:
Throw exception if a user tries to construct a OpenSslServerContext with a KeyManagerFactory
Result:
Fail fast if the user tries to use something that is not supported.
Related: #4572
Motivation:
- A user might want to extend Http2ConnectionHandler and define his/her
own static inner Builder class that extends
Http2ConnectionHandler.BuilderBase. This introduces potential
confusion because there's already Http2ConnectionHandler.Builder. Your
IDE will warn about this name duplication as well.
- BuilderBase exposes all setters with public modifier. A user's Builder
might not want to expose them to enforce it to certain configuration.
There's no way to hide them because it's public already and they are
final.
- BuilderBase.build(Http2ConnectionDecoder, Http2ConnectionEncoder)
ignores most properties exposed by BuilderBase, such as
validateHeaders, frameLogger and encoderEnforceMaxConcurrentStreams.
If any build() method ignores the properties exposed by the builder,
there's something wrong.
- A user's Builder that extends BuilderBase might want to require more
parameters in build(). There's no way to do that cleanly because
build() is public and final already.
Modifications:
- Make BuilderBase and Builder top-level so that there's no duplicate
name issue anymore.
- Add AbstractHttp2ConnectionHandlerBuilder
- Add Http2ConnectionHandlerBuilder
- Add HttpToHttp2ConnectionHandlerBuilder
- Make all builder methods in AbstractHttp2ConnectionHandlerBuilder
protected so that a subclass can choose which methods to expose
- Provide only a single build() method
- Add connection() and codec() so that a user can still specify
Http2Connection or Http2Connection(En|De)coder explicitly
- Implement proper state validation mechanism so that it is prevented
to invoke conflicting setters
Result:
Less confusing yet flexible builder API
Motivation:
We need to ensure we consume all pending data in the BIO on error to correctly send the close notify for the remote peer.
Modifications:
Correctly force the user to call wrap(...) if there is something left in the BIO.
Result:
close_notify is not lost.
Motivation:
When ClientAuth is set via SslContextBuilder we pass it into the OpenSslEngine constructor. Due a bug we missed to call the correct native methods and so never enabled ClientAuth in this case.
Modifications:
Correctly call setClientAuth(...) in the constructor if needed.
Result:
client auth also works when configured via the SslContextBuilder and OPENSSL is used.
Motivation:
The KObjectHashMapTest is in a directory called "io.netty.util.collection" rather than "io/netty/util/collection". This causes the generated tests to be created in the wrong directory as well.
Modifications:
Moved the file.
Result:
Fixes#4546
Motivation:
As discussed in #4529, NameResolver design shouldn't be resolving SocketAddresses (or String name + port) and return InetSocketAddresses. It should resolve String names and return InetAddresses.
This SocketAddress to InetSocketAddresses resolution is actually a different concern, used by Bootstrap.
Modifications:
Extract SocketAddress to InetSocketAddresses resolution concern to a new class hierarchy named AddressResolver.
These AddressResolvers delegate to NameResolvers.
Result:
Better separation of concerns.
Note that new AddressResolvers generate a bit more allocations because of the intermediate Promise and List<InetAddress>.
Motivation:
We need to remove all registered events for a Channel from the EventLoop before doing the actual close to ensure we not produce a cpu spin when the actual close operation is delayed or executed outside of the EventLoop.
Modifications:
Deregister for events for NIO and EPOLL socket implementations when SO_LINGER is used.
Result:
No more cpu spin.
Motivation:
Related to issue #4564.
AsciiString.contentEqualsIgnoreCase fails when comparing two AsciiStrings of the same length
Modifications:
Compare the values of the first AsciiString to the second AsciiString
Result:
AsciiString.contentEqualsIgnoreCase works as expected
Motivation:
Initialisation of the ByteBufUtil class, a class frequently used is
delayed because a significant number of String operations is performed to
fill a HEXDUMP_ROWPREFIXES array. This array also sticks to the Strings
forever.
It is quite likely that applications never use the hexdump facility.
Modification:
Moved the static initialisation and references to a static inner class.
This delays initialisation (and memory usage) until actually needed.
The API is kept as is.
Result:
Faster startup time, less memory usage for most netty using applications.
Motivation:
DefaultPromiseTest has dead code which was left over from a code restructure. Shared code between 2 tests was moved into a common method, but some code which was not cleaned up in each of these methods after the code was moved.
Modifications:
- Delete dead code in DefaultPromiseTest
Result:
Less dead code
Motivation:
AbstractFuture currently wraps CancellationException in a ExecutionException. However the interface of Future says that this exception should be directly thrown.
Modifications:
- Throw CancellationException from AbstractFuture.get
Result:
Interface contract for CancellationException is honored in AbstractFuture.
Motivation:
We should retain the original hostname when connect to a remote peer so the user can still query the origin hostname if getHostString() is used.
Modifications:
Compute a InetSocketAddress from the original remote address and the one returned by the Os.
Result:
Same behavior when using epoll transport and nio transport.
Motivation:
Some times the user wants to set a Http2HeaderEncoder.SensitivityDetector when building a Http2ConnectionHandler.
Modifications:
Allow to set Http2HeaderEncoder.SensitivityDetector via builder.
Result:
More flexible building of Http2ConnectionHandler possible.
Motivation:
If a uri contains whitespaces we need to ensure we correctly escape these when creating the request for the handshake.
Modifications:
- Correctly encode path for uri
- Add tests
Result:
Correctly handle whitespaces when doing websocket upgrade requests.
Motivation:
We already provide a NEVER_SENSITIVE instance,we should add ALWAYS_SENSITIVE as well.
Modifications:
Add ALWAYS_SENSITIVE instance which will always return true when check for sesitive.
Result:
User can reuse code.
Motivation:
We recently added methods to ByteBuf to directly write and read LE values. We should use these in the Snappy implementation and so reduce duplication.
Modifications:
Replace manually swapping of values with LE write and read methods of ByteBuf.
Result:
Cleaner code with less duplication.
Motivation:
We missed to remove a method in SslContext while refactored the implementation. We should remove the method to keep things clean.
Modifications:
Remove unused method.
Result:
Code cleanup.
Motivation:
There's no way to override the default settings of the DnsNameResolvers
created by DnsNameResolverGroup because DnsNameResolverGroup is final.
Modifications:
- Make DnsNameResolverGroup non-final
- Add a new overridable protected method 'newResolver()' so that a user
can override it to create an alternative DnsNameResolver instance or
set the non-default properties
Result:
A user can configure the DnsNameResolver.
Motivation:
Each server should be checked for every record type. Currently, if there
are only two configured servers and the first is down, it is impossible
to query for IPv4 addresses because the second server is only ever
queried for type AAAA.
Modifications:
Do not cycle DNS servers while cycling DNS record types (A and AAAA)
Result:
Name resolution is less fragile when the number of available DNS servers
is 2.
Motivation:
Use new / non-deprecated APIs for creating SSL Context
in tests, in order to be able to implement OpenSsl
tests with maximum code reuse.
Modifications:
Use `SslContextBuilder.(forServer|forClient)` instead
of deprecated `JdkSslServerContext` constructor.
Use `ApplicationProtocolConfig` instead of Protocol
Negotiator.
Use custom exception type for skipping tests to avoid
swallowing exceptions arising from tests.
Result:
Exceptions from tests aren't swallowed.
Using new APIs allows reusing same test code for
OpenSsl tests.
Motivation:
HttpClientUpgradeHandler uses HttpHeaderNames.UPGRADE as the value of
the 'Connection' header, which is incorrect. It should use
HttpHeaderValues.UPGRADE instead (note Names vs Values.)
Also, HttpHeaderValues.UPGRADE should be 'upgrade' rather than
'Upgrade', as defined in:
- https://tools.ietf.org/html/rfc7230#section-6.7
Modifications:
- Use HttpHeaderValues.UPGRADE for a 'Connection' header
- Lowercase the value of HttpHeaderValues.UPGRADE
Result:
- Fixes#4508
- Correct behavior
Motivation:
On a successful protocol upgrade in HTTP, HttpClientUpgradeHandler calls
HttpClientCodec.upgradeFrom(), which removed both the HTTP encoder and
decoder from the pipeline immediately.
However, because the decoder is in the middle of the decode loop,
removing it from the pipeline immediately will cause the cumulation
buffer to be released prematurely.
This often leads to an IllegalReferenceCountException or missing first
response after the upgrade response.
Modifications:
- Remove the decoder *after* the decode loop is done
Result:
Fixes#4504
Motivation:
HttpClientUpgradeHandler currently throws an IllegalStateException when
the server sends a '101 Switching Protocols' response that has no
'Upgrade' header.
Some servers do not send the 'Upgrade' header on a successful protocol
upgrade and we could safely assume that the server accepted the
requested protocol upgrade in such a case, looking from the response
status code (101)
Modifications:
- Do not throw an IllegalStateException when the server responded 101
without a 'Upgrade' header
- Note that we still check the equality of the 'Upgrade' header when it
is present.
Result:
- Fixes#4523
- Better interoperability
Motivation:
Fix a race-condition when closing NioSocketChannel or EpollSocketChannel while try to detect if a close executor should be used and the underlying socket was already closed. This could lead to an exception that then leave the channel / in an invalid state and so could lead to side-effects like heavy CPU usage.
Modifications:
Catch possible socket exception while try to get the SO_LINGER options from the underlying socket.
Result:
No more race-condition when closing the channel is possible with bad side-effects.
Motivation:
- On the client, cookies should be sorted in decreasing order of path
length. From RFC 6265:
5.4.2. The user agent SHOULD sort the cookie-list in the following
order:
* Cookies with longer paths are listed before cookies with
shorter paths.
* Among cookies that have equal-length path fields, cookies with
earlier creation-times are listed before cookies with later
creation-times.
NOTE: Not all user agents sort the cookie-list in this order, but
this order reflects common practice when this document was
written, and, historically, there have been servers that
(erroneously) depended on this order.
Note that the RFC does not define the path length of cookies without a
path. We sort pathless cookies before cookies with the longest path,
since pathless cookies inherit the request path (and setting a path
that is longer than the request path is of limited use, since it cannot
be read from the context in which it is written).
- On the server, if there are multiple cookies of the same name, only one
of them should be encoded. RFC 6265 says:
Servers SHOULD NOT include more than one Set-Cookie header field in
the same response with the same cookie-name.
Note that the RFC does not define which cookie should be set in the case
of multiple cookies with the same name; we arbitrarily pick the last one.
Modifications:
- Changed the visibility of the 'strict' field to 'protected' in
CookieEncoder.
- Modified ClientCookieEncoder to sort cookies in decreasing order of path
length when in strict mode.
- Modified ServerCookieEncoder to return only the last cookie of a given
name when in strict mode.
- Added a fast path for both strict mode in both client and server code
for cases with only one cookie, in order avoid the overhead of sorting
and memory allocation.
- Added unit tests for the new cases.
Result:
- Cookie generation on client and server is now more conformant to RFC 6265.
As discussed in #3209, this PR adds Little Endian accessors
to ByteBuf and descendants.
Corresponding accessors were added to UnsafeByteBufUtil,
HeapByteBufferUtil to avoid calling `reverseBytes`.
Deprecate `order()`, `order(buf)` and `SwappedByteBuf`.
Motivation:
ChannelMetadata has a field minMaxMessagesPerRead which can be confusing. There are also some cases where static instances are used and the default value for channel type is not being applied.
Modifications:
- use a default value which is set unconditionally to simplify
- make sure static instances of MaxMessagesRecvByteBufAllocator are not used if the intention is that the default maxMessagesPerRead should be derived from the channel type.
Result:
Less confusing interfaces in ChannelMetadata and ChannelConfig. Default maxMessagesPerRead is correctly applied.
Motivation:
Because we flow control HEADERS frames, it's possible that an intermediate error can result in a RST_STREAM frame being sent for a frame that the other endpoint is not yet aware of. This is a violation of the spec and will either result in spammy logs at the other endpoint or broken connections.
Modifications:
Modified the HTTP/2 handler so that it only sends RST_STREAM if it has sent at least one HEADERS frame to the remote endpoint for the stream.
Result:
Fixes#4465
Motivation:
The CoalescingBufferQueueTest is somewhat relaxed with its releasing of test buffers, using safeRelease to generically deal with tests that may or may not release the buffers. SafeRelease generates logs, however, when the release fails.
Modifications:
Tightened up the individual test methods to verify that the buffers are released properly.
Result:
Fixes#4497
Motivation:
The javadocs for ChannelOption.AUTO_CLOSE say the default is false, but the default is currently true.
Modifications:
- Make javadocs consistent with code
Result:
Less confusing docs.
Motivation:
The encoder is currently responsible for chunking frames when writing in order to conform to max frame size. The frame writer would be a better place for this since it could perform a reuse the same promise aggregator for all the write and could also perform a single allocation for all of the frame headers.
Modifications:
Modified `DefaultHttp2FrameWriter` to perform the chunking and modified the contract in the `Http2FrameWriter` interface. Modified `DefaultHttp2ConnectionEncoder` to send give all allocated bytes to the writer.
Result:
Fixes#3966
Motivation:
The UniformStreamByteDistributor currently processes all zero-length frames, regardless of add order. This means that we would always send HEADERS for all streams, possibly taking away bandwidth for streams that actually have data.
Modifications:
Empty frames are now treated the same as any other frame except that the algorithm will pop off the any empty frames at the head of the queue.
Result:
Empty frames require no extra processing.
