SwiftNIO 1.6.0

Semver Minor

• Added new UnsafeEmbeddedAtomic type. (#373)
• Added prepend, removeLast, and last to CircularBuffer. (#347)

Semver Patch

• Removed warnings in Swift 4.2. (#374)
• Added more license documentation for 3rd party modules. (#251)
• Fixed an issue where connect promises could be leaked without being failed. (#337)
• Reduced the number of memory allocations required to create an EventLoopFuture. (#373)
• ByteBuffer's debug output is now compatible with being parsed by xxd. (#367)
• Fixed a bug where WebSocket frames could be delivered multiple times on connection closure. (#368)
• ByteBuffer.discardReadBytes no longer triggers a memory copy if the buffer was fully consumed. (#363)
• Improved the ability of the compiler to specialise ByteBuffer copies of contiguous data types. (#360)
• Worked around an optimiser bug that caused unnecessary heap allocations when writing StaticString objects into ByteBuffers. (#354)
• Added dtrace scripts for debugging memory allocations. (#352)
• Greatly reduced the overhead of passing HTTPRequestHead and HTTPResponseHead around the ChannelPipeline by placing them into a CoW heap-allocated box. (#351)
• Shrunk the size of ByteBuffer and FileRegion to fewer than 3 words, ensuring that enums that wrap these types can still fit into an existential container without triggering heap allocation. (#349)
• Fixed a bug where the HTTPServerPipelineHandler would incorrectly deliver message parts out of order. (#348)
• Fixed a bug where Channel.localAddress and Channel.remoteAddress would be nil during channelInactive and handlerRemoved callbacks. (#346)
• Improved the performance of HTTPHeaders[canonicalForm:] in the case where no headers with that header name exist. (#344)
• Miscellaneous code & testing improvements. (#335, #338, #353, #356, #357, #358, #361, #362, #365, #366, #371, #375, #376)
• Documentation improvements. (#359)

SwiftNIO 1.5.1

Semver Patch

• Fixed a bug where we'd accidentally deliver events for unrelated file descriptors. (#341)
• Fixed the sample web socket server. (#340)
• Better debug descriptions for HTTPRequestHead, HTTPResponseHead, and HTTPVersion. (#339)

SwiftNIO 1.5.0

Semver Minor

• Improved HTTPServerProtocolErrorHandler and HTTPServerPipelineHandler to interact better together. HTTPServerPipelineHandler now also buffers protocol errors, preventing the ChannelPipeline from seeing those errors until the correct sequence point. HTTPServerProtocolErrorHandler now avoids emitting 400 errors if a partial response is already in flight. (#314)
• Enhanced WebSocketUpgrader to allow overriding the default maximum websocket frame size. (#315)
• Made IdleStateHandler.IdleStateEvent public: it had accidentally been made internal. (#319)
• Enhanced the ChannelCore protocol with unwrapData, allowing external ChannelCore implementers to unwrap NIOAny wrappers. (#321)
• Enhanced BlockingIOThreadPool with a runWithActive method that automatically fails submitted tasks if the pool has been shut down. (#256)
• Enhanced NonBlockingFileIO struct with a non-blocking openFile method, allowing users to avoid making blocking open syscalls. (#256)
• Made HTTPResponseHead and HTTPRequestHead mutable. (#324)
• Enhanced all NIO core channels with support for registering already-active sockets (that is, sockets that have had connect, listen, or bind called on them already) with NIO event loops, preventing the need to double-call some of these syscalls, an operation that is not always safe. (#285)
• Enhanced the ServerBootstrap and DatagramBootstrap with a withBoundSocket(descriptor:) method that can take an already-bound socket and use it as the basis for a channel. (#285)
• Enhanced the ClientBootstrap with a withConnectedSocket(descriptor:) method that can take an already-connected socket and use it as the basis for a channel. (#285)

Semver Patch

• Fixed issues in HTTP/1 framing where some requests and methods that never have bodies would not parse correctly if they were missing transport headers. (#298)
• Fixed issues in HTTP/1 framing where EOF was not being passed to the parser to help it decode request/response bodies that are terminated by EOF. (#298)
• Improved the performance of writing the HTTP/1 request-line and response-line in most cases. (#300)
• Reduced the number of heap allocations required to manage the state of pending stream writes. (#308)
• Started processing EOF and socket reset eagerly, rather than attempting to buffer it. This resolved a number of issues with hot-looping on epoll_wait. (#286, #325)
• Vastly reduced the number of allocations required to write/read integers to/from ByteBuffers. (#316)
• Improved error handling when connect fails synchronously, preventing the FD from being registered with the selector. (#329)
• Started failing pending connect promises before notifying the pipeline of changechannelInactive, instead of after. (#330)
• Many fixes and improvements to the tests. (#311, #318, #326, #332, #331, #334)
• Miscellaneous code improvements (#312)

SwiftNIO 1.4.2

Semver Patch

• Fixed a crash when asynchronous connect calls failed. (#309)
• Fixed a crash when calling close from inside a write promise callback where the write failed due to the channel being closed. (#310)

SwiftNIO 1.4.1

Semver Patch

• Restore unary initializer for HTTPHeaders. (#301)

SwiftNIO 1.4.0

Semver Minor

• More strictly enforced channel lifecycle tracking. This will cause new errors to be thrown if channels are mishandled by the NIO core. (#220)
• Added EventLoopFuture.fold. (#269)
• Added EventLoopFuture.reduce and EventLoopFuture.reduce(into:). (#240)
• Added a HTTP server handler that can send 400 errors on HTTP parser errors. (#268)
• Renamed HTTPHeaders.getCanonicalForm to HTTPHeaders[canonicalForm:], deprecated the old interface. (#293)
• Made several ByteBuffer generic methods inlinable. (#266)
• Implemented lazy HTTP header parsing. Users, please note that this may change the casing of your HTTP headers. (#291)

Semver Patch

• Changed graceful event loop shutdown to properly wait for channel shutdown. (#231)
• Removed needless availability check restricting use on older macOS platforms. (#233)
• Reduced locking overhead in the EventLoop. (#235)
• Removed overhead in SocketChannel, ServerSocketChannel, DatagramChannel, and PendingDatagramWriteManager relating to the removed flush promises. (#234)
• Removed unnecessary promise allocation in Selector.closeGently. (#237)
• Cleaned up ordering in EmbeddedChannel connect and close with respect to promises and channelActive/channelInactive. (#241)
• Improved PriorityQueue and Heap performance by bringing them into the NIO module. (#245)
• Reduced the duplication of results in getaddrinfo lookups. (#221)
• Reduced storage overhead of ChannelHandlerContext. (#247)
• Avoided re-arming timerfd on Linux when doing so was not necessary. (#264)
• Improved performance of allocation operations in ByteBuffer. (#267)
• Improved performance and reduced allocation in HTTPDecoder. (#275)
• Added WebSocket documentation. (#276)
• Enhanced HTTPDecoder to reject HTTP 0.9 and any misleading HTTP/1.1-style protocol that claims a HTTP/2 or higher version. (#283)
• Fixed some TSAN issues.
• Reduced the number of read calls in most cases. (#296)
• Improved the performance of outbound channel operations. (#297)
• Cleaned up typos and other code. (#230, #236, #259, #273)

SwiftNIO 1.3.1

Semver Patch

• Fixed build issues on Swift 4.1 snapshots. (#229)

SwiftNIO 1.3.0

Semver Minor

• Gave HTTPResponseStatus a public initializer that can take a numerical status code and optional reason phrase and create an appropriate enum member, instead of forcing users to use .custom. (#158)
• Added EventLoopFuture.hopTo(eventLoop:) to simplify code that needs to ensure callbacks dispatch to a specific thread. (#177)

Semver Patch

• Suppressed compiler warnings that were emitted in release mode. (#179)
• Fixed compilation on iOS. (#180)
• Fixed possible infinite loop when shutting down event loops. (#188)
• Brought EmbeddedEventLoop's task scheduling behaviour closer to that of MultiThreadedEventLoop. (#189)
• Fixed ordering issues between promises and fire* methods. (#181)
• Fixed failure to expose backwards-compatibility shim for HTTP header iterator type. (#194)
• Reduced memory allocation during task dispatch on MultiThreadedEventLoopGroup. (#192)
• Fixed ordering issues where fireChannelRead could dispatch before fireChannelActive. (#195, #204)
• Fixed issue where Happy Eyeballs connection state machine would fatalError under high load. (#191)
• Correctly fail the futures returned from Channel.getOption and channel.setOption when the channel is closed. (#198)
• Improved error message when a non-synchronous connect fails. (#203)
• Correctly make the channel active when connect succeeds synchronously. (#205)
• Better diagnostic logging when leaking an EventLoopPromise allocated from ChannelOutboundInvoker. (#208)
• Don't crash when a selectable is unregistered from a selector while there are pending select events for that selectable. (#210)
• Don't retry close when the syscall returns with EINTR. (#217)
• Work around performance penalty from SR7242. (#223)
• Prevent users getting access to or removing HeadChannelHandler and TailChannelHandler. (#225)
• Correctly fail EventLoopPromise for writes on ServerSocketChannel instead of crashing. (#226)
• Miscellaneous documentation and code style improvements (#207, #212, #219, #197, #142, #193, #87, #190, #183)