SwiftNIO HTTP/2 1.6.0

SemVer Patch

• Allow adding a sequence of headeers to HPACKHeaders (#155, patch credit to @glbrntt)

SemVer Minor

• fix dependencies: require NIO 2.3.0 (#154, reported by @glbrntt)
• accept more valid-in-HTTP/1 but invalid-in-H2 messages (#153, reported by @Csloan7597)

SwiftNIO HTTP/2 1.5.0

This patch contains security content: please update to it immediately.

Semver Minor

• Added multiple denial of service resistance vectors, and APIs for controlling them. See GHSA-jchv-x857-q8fq for more. (86ce1dc)

SwiftNIO HTTP/2 1.4.0

Semver Minor

• Added support for network-exerted backpressure to HTTP2Channel. (#142)

Semver Patch

• Fixed an issue where servers sending a PUSH_PROMISE frame before HEADERS would cause streams to be reset. (#145)
• Fixed an issue where unexpected per-stream frames would crash HTTP2ToHTTP1Codec. (#146)
• Miscellaneous testing improvements. (#141)

SwiftNIO HTTP/2 1.3.0

Semver Minor

• Made HTTP2StreamID conform to Strideable. (#133)

Semver Patch

• Fixed issue where promises for buffered outbound frames could be incorrectly lost when closing connections. (#135)
• Improved performance by coalescing flushes from child channels in some circumstances. (#132)
• Improved performance by minimising channelReadComplete calls. (#136)

SwiftNIO HTTP/2 1.2.1

Semver Patch

• Fixed an issue where stream channels would not be closed if the underlying transport vanished. (#131)
• Fixed an issue where flushed frames could very rarely get "stuck" and not emitted until the next flush. (#125)
• Fixed an issue where flow controlled inbound frames could have their flow control state counted more than once. (#114)
• Improved performance by removing indirection between stream channels and the stream multiplexer. (#126)
• Fixed up system for notifying stream channels that they've become active, avoiding issues when setting up such channels. (#124)
• Correctly notify the outbound frame buffer of changes to the remote peer's value of SETTINGS_MAX_CONCURRENT_STREAMS. (#113)
• Allow closing idle stream channels that have never been used. (#123)
• Improved performance by removing unnecessary future callbacks in stream channel setup. (#116)
• Reduced heap allocations when creating stream channels. (#115)
• Reduced heap allocations when decoding HPACK header blocks. (#118)
• Reduced copying when transforming between HTTP/1 and HTTP/2 header blocks. (#112)
• Removed an inadvertent copy-on-write when buffering inbound frame bytes. (#111)
• Boxed some cases of HTTP2Frame.FramePayload to avoid the costs of copying the data about. (#110)
• Improved test setup. (#129, #130)
• Added allocation tests. (#122)
• Added performance tests. (#117)
• Turned on warnings as errors in CI. (#127)

SwiftNIO HTTP/2 1.2.0

Semver Minor

• Added support for policing correct content length headers, with support for disabling these checks if needed. (#98)

Semver Patch

• Fixed an off-by-one error when calculating the valid bounds of certain HTTP/2 settings. (#97)
• Fixed an issue where we'd incorrectly reject headers that were larger than the dynamic table size, instead of flushing the table. (#99)
• Fixed an issue where max stream ID was forbidden in GOAWAY when sent by servers. (#102)
• Removed unnecessary memory copies in the state machine. (#104)
• Avoided unnecessary heap allocation when parsing frame headers. (#107)
• Fixed an issue where NIO would consider WINDOW_UPDATE frames on closed streams to be a connection error of type PROTOCOL_ERROR. (#109)
• Added "Show on Github" link to API docs. (#108)

SwiftNIO HTTP/2 1.1.0

Semver Minor

• Added additional validation for inbound and outbound HPACK headers. This change adds a number of new errors and a new API to NIOHTTP2Handler to disable this validation. (#84, #90, #91, #94, #95)
• Rewrote the representation of HPACK headers for a substantial performance improvement. (#89)

Semver Patch

• Fixed a bug where zero-length SETTINGS frames would be treated as an error. (#88)
• Substantially decreased the allocation overhead of encoding HTTP headers. (#86)
• Documentation cleanups. (#82, #82)

SwiftNIO HTTP/2 1.0.1

Semver Patch

• Added validation to enforce that END_STREAM is set on HEADERS frames containing trailers. (#81)
• Forced HTTP2StreamMultiplexer to forward on channelActive to the parent channel. (#80)
• Miscellaneous docs fixes. (#76, #77, #78)

SwiftNIO HTTP/2 1.0.0

This is the first major release of SwiftNIO HTTP/2. It substantially changes the API and moves the implementation to a pure-Swift model. As the changes are so large, we do not have release notes here: please consider the 1.0 revision as an entirely clean slate.

SwiftNIO HTTP/2 0.2.1

Semver Patch

• Initiate HTTP/2 parser on handlerAdded as well as on channelActive, to facilitate adding HTTP/2 handlers to pipelines after setup. (#36)