hyper

Features

• rt: add ReadBufCursor::initialized_unfilled() method (#4115) (ccc1e850)

Bug Fixes

• http1:
  • discard content-length header when received before transfer-encoding (#4124) (540fff91, closes #4123)
  • use append for repeat trailer values in encoder (#4118) (de1483d7)
  • allow up to max_headers trailers (#4108) (f584091a)
  • use append for repeat trailers (#4107) (876effe1)
  • flush buffered data before shutdown (#4018) (72046cc7, closes #4022)
  • more strictly enforce max_buf_size when parsing (#4093) (90ede307, closes #4081)
• http2: avoid buffering Upgraded writes without send capacity (#4102) (aecf5abf)

All PRs

• removing cast_lossless lint by @josetorrs in #4087
• Fix the borrow_as_ptr lint by @xd009642 in #4082
• removing empty_structs_with_brackets lint by @josetorrs in #4088
• style(proto): removing explicit_iter_loop lint by @josetorrs in #4089
• Fix the ptr_as_ptr lint by @nakaryo716 in #4091
• style(lib): remove manual_assert_eq lint by @josetorrs in #4090
• style(http2): allow an instance of large_enum_variant, deny otherwise by @seanmonstar in #4092
• Removing 'undocumented_unsafe_blocks' lint allowance by @Lori-Shu in #4083
• style(http2): use an enum instead of bool in strip_connection_headers() by @seanmonstar in #4094
• fix(http1): more strictly enforce max_buf_size when parsing by @seanmonstar in #4093
• h1 servers can shutdown connections with pending buffered data on filled sockets by @deven96 in #4018
• refactor(http1): remove ref_option lint by @nakaryo716 in #4101
• style(lib): remove unnecessary_semicolon lint by @josetorrs in #4103
• style(lib): remove uninlined_format_args lint by @josetorrs in #4104
• style(lib): remove semicolon_if_nothing_returned lint by @MonkieeBoi in #4106
• style(lib): remove single_match_else lint by @yunz-dev in #4105
• style(lib): remove default_trait_access lint by @nakaryo716 in #4111
• fix(http1): use append for repeat trailers by @seanmonstar in #4107
• fix(http1): allow up to max_headers trailers by @seanmonstar in #4108
• fix(http2): avoid buffering Upgraded writes without send capacity by @seanmonstar in #4102
• style(headers): small refactor to remove question_mark lint by @josetorrs in #4116
• fix(h1): append duplicate trailer values when encoding (match #4107) by @greymoth-jp in #4118
• style(proto): fix decimal_literal_representation lint by @josetorrs in #4117
• docs(governance): define Advisor role by @seanmonstar in #4098
• docs(maintainers): move some collaborators to emeriti by @seanmonstar in #4125
• feat: add initialized_unfilled to ReadBufCursor by @abh1nav10 in #4115
• fix(http1): discard content-length header when received before transfer-encoding by @seanmonstar in #4124

New Contributors

• @josetorrs made their first contribution in #4087
• @nakaryo716 made their first contribution in #4091
• @deven96 made their first contribution in #4018
• @MonkieeBoi made their first contribution in #4106
• @yunz-dev made their first contribution in #4105
• @greymoth-jp made their first contribution in #4118
• @abh1nav10 made their first contribution in #4115

What's Changed

• fix(http1): fix busy loop when peer half-closes and open body by @seanmonstar in #4086

Full Changelog: v1.10.0...v1.10.1

Bug Fixes

• http1: fix busy loop when peer half-closes and open body (#4086) (c6cb906f, closes #4085)

v1.10.0 (2026-05-27)

Bug Fixes

• http1:
  • send error when dispatcher is dropped mid-body (#4069) (b7a679ba, closes #3995, #4016)
  • fix reading large bodies on 32-bit systems (#4056) (b12f6525, closes #4055)
  • fix rare missed write wakeup on connections v2 (743a3ba0)
• http2:
  • do not reserve capacity before body data is available (#4061) (99f24345, closes #4003)
  • reading trailers shouldn't propagate NO_ERROR from early response (#3998) (e5ad96b1)

Features

• http2:
  • add reset_stream_duration() client option (#4068) (156a6f6a, closes #2599)
  • Add 'header_table_size()' method to server builder (#4062) (6c9182c4)

v1.9.0 (2026-03-31)

Bug Fixes

• ffi: validate null pointers before dereferencing in request/response functions (#4038 (28e73ccd)
• http1:
  • allow keep-alive for chunked requests with trailers (#4043) (7211ec25, closes #4044)
  • use case-insensitive matching for trailer fields (#4011) (3b344cac, closes #4010)
  • use httparse config for Servers (#4002) (bcb8ec57, closes #3923)
• http2:
  • cancel sending client request body on response future drop (#4042) (5b17a69e, closes #4040)
  • non-utf8 char in Connection header may cause panic when calling to_str (#4019) (c36ca8a5)

Features

• client:
  • expose HTTP/2 current max stream count (#4026) (d51cb715)
  • add HTTP/2 max_local_error_reset_streams option (#4021) (57787459)
• error: add 'Error::is_parse_version_h2' method (393c77c7)
• http1: add UpgradeableConnection::into_parts (e21205cf)

Features

• http2:
  • add reset_stream_duration() client option (#4068) (156a6f6a, closes #2599)
  • Add 'header_table_size()' method to server builder (#4062) (6c9182c4)

Bug Fixes

• http1:
  • send error when dispatcher is dropped mid-body (#4069) (b7a679ba, closes #3995, #4016)
  • fix reading large bodies on 32-bit systems (#4056) (b12f6525, closes #4055)
  • fix rare missed write wakeup on connections v2 (743a3ba0)
• http2:
  • do not reserve capacity before body data is available (#4061) (99f24345, closes #4003)
  • reading trailers shouldn't propagate NO_ERROR from early response (#3998) (e5ad96b1)

Refactors, chores, et al

• fix(http1): fix rare missed write wakeup on connections v2 by @lthiery in #3988
• fix(client): reading trailers shouldn't propagate NO_ERROR from early response by @ulyssa in #3998
• fix(http1): fix reading large bodies on 32-bit systems by @seanmonstar in #4056
• fix(http2): do not reserve capacity before body data is available by @seanmonstar in #4061
• Fix two clippy lints by @jplatte in #4063
• docs(client): document Drop behavior for Connection types by @lihan3238 in #4064
• Add header_table_size method to server builder by @ArniDagur in #4062
• feat(http2/client): expose reset_stream_duration option by @kimjune01 in #4068
• fix(http1): send error when dispatcher is dropped mid-body by @seanmonstar in #4069
• docs: document cancel safety for client send_request futures by @lihan3238 in #4070
• docs(error): add detailed doc comments to Error query methods by @kimjune01 in #4065
• refactor(lib): use a panic_if_poisoned() helper for mutexes by @seanmonstar in #4072
• refactor(lib): replace unwraps with expects by @seanmonstar in #4073
• docs(lib): fixup markdown and grammar in doc comments by @seanmonstar in #4074
• chore(ci): fix security-audit job by @seanmonstar in #4076
• chore(lib): start a strict clippy config by @seanmonstar in #4075
• tests(client): fix misuse of path_and_query in CONNECT test by @seanmonstar in #4078
• Removing wildcard_imports lint allowance by @Lori-Shu in #4080
• Fix manual_assert lint by @xd009642 in #4079

New Contributors

• @ulyssa made their first contribution in #3998
• @lihan3238 made their first contribution in #4064
• @ArniDagur made their first contribution in #4062
• @kimjune01 made their first contribution in #4068
• @Lori-Shu made their first contribution in #4080
• @xd009642 made their first contribution in #4079

Full Changelog: v1.9.0...v1.10.0

Features

• client:
  • expose HTTP/2 current max stream count (#4026) (d51cb715)
  • add HTTP/2 max_local_error_reset_streams option (#4021) (57787459)
• error: add 'Error::is_parse_version_h2' method (393c77c7)
• http1: add UpgradeableConnection::into_parts (e21205cf)

Bug Fixes

• ffi: validate null pointers before dereferencing in request/response functions (#4038 (28e73ccd)
• http1:
  • allow keep-alive for chunked requests with trailers (#4043) (7211ec25, closes #4044)
  • use case-insensitive matching for trailer fields (#4011) (3b344cac, closes #4010)
  • use httparse config for Servers (#4002) (bcb8ec57, closes #3923)
• http2:
  • cancel sending client request body on response future drop (#4042) (5b17a69e, closes #4040)
  • non-utf8 char in Connection header may cause panic when calling to_str (#4019) (c36ca8a5)

Refactors and chores

• docs(error): add more information about is_incomplete_message by @seanmonstar in #3978
• Run cargo-audit in CI to check for known vulnerabilities in dependencies. by @f0rki in #3246
• refactor(http1): simplify match of Token parse error by @seanmonstar in #3981
• refactor(http1): use saturating_sub instead of manual impl by @seanmonstar in #3983
• refactor(http1): replace many args of Chunked::step with struct by @seanmonstar in #3982
• docs: fix comment in put_slice() by @coryan in #3986
• test(lib): fix unused warnings due to feature gating test imports by @seanmonstar in #3997
• docs: improve Read trait and ReadBufCursor documentation by @majiayu000 in #4000
• fix: use h1 parser config when parsing server req by @0xPoe in #4002
• test(server): fix flaky disable_keep_alive_mid_request by @seanmonstar in #4009
• chore(ci): update to actions/checkout@v6 by @tottoto in #4005
• chore(ci): update to cargo-check-external-types 0.4.0 by @tottoto in #4006
• update copyright year to 2026 by @jasmyhigh in #4007
• refactor: avoid unwrap examples by @0xPoe in #4001
• fix(http1): use case-insensitive matching for trailer fields by @HueCodes in #4011
• chore: convert bug report template to GitHub form by @njg7194 in #4015
• chore(ci): force toml mode in yq selecting msrv by @seanmonstar in #4020
• fix: non-utf8 char may cause panic when calling to_str by @cuiweixie in #4019
• feat(http2/client): add max_local_error_reset_streams option by @ffuugoo in #4021
• chore: drop pin-utils dependency by @tottoto in #4023
• [minor] doc: Fix HTTP/2 max concurrent stream link by @dentiny in #4037
• fix(ffi): validate null pointers before dereferencing in request/resp… by @DhruvaD1 in #4038
• h2: expose current max stream count by @howardjohn in #4026
• fix(http1): allow keep-alive for chunked requests with trailers by @wi-adam in #4043
• fix(http2): cancel pipe_task and send RST_STREAM on response future drop by @mmishra100 in #4042
• Add APIs to allow switching an HTTP1 connection to HTTP2 if H2 preface is seen by @pborzenkov in #3996

New Contributors

• @f0rki made their first contribution in #3246
• @coryan made their first contribution in #3986
• @majiayu000 made their first contribution in #4000
• @0xPoe made their first contribution in #4002
• @jasmyhigh made their first contribution in #4007
• @HueCodes made their first contribution in #4011
• @njg7194 made their first contribution in #4015
• @cuiweixie made their first contribution in #4019
• @ffuugoo made their first contribution in #4021
• @dentiny made their first contribution in #4037
• @DhruvaD1 made their first contribution in #4038
• @wi-adam made their first contribution in #4043
• @mmishra100 made their first contribution in #4042
• @pborzenkov made their first contribution in #3996

Bug Fixes

• http1: fix consuming extra CPU from previous change (#3977) (4492f31e)

Full Changelog: v1.8.0...v1.8.1

Bug Fixes

• http1: fix consuming extra CPU from previous change (#3977) (4492f31e)

v1.8.0 (2025-11-11)

Bug Fixes

• http1: fix rare missed write wakeup on connections (#3952) (2377b893)
• http2: fix internals of HTTP/2 CONNECT upgrades (#3967) (58e0e7dc, closes #3966)

Features

• rt: add Timer::now() method to allow overriding the instant returned (#3965) (5509ebe6)

Breaking Changes

• The HTTP/2 client connection no longer allows an executor that can not spawn itself.

  This was an oversight originally. The client connection will now include spawning a future that keeps a copy of the executor to spawn other futures. Thus, if it is !Send, it needs to spawn !Send futures. The likelihood of executors that match the previously allowed behavior should be very remote.

  There is also technically a semver break in here, which is that the Http2ClientConnExec trait no longer dyn-compatible, because it now expects to be Clone. This should not break usage of the conn builder, because it already separately had E: Clone bounds. If someone were using dyn Http2ClientConnExec, that will break. However, there is no purpose for doing so, and it is not usable otherwise, since the trait only exists to propagate bounds into hyper. Thus, the breakage should not affect anyone. (58e0e7dc)

v1.7.0 (2025-08-18)

Bug Fixes

• server: improve caching accuracy of Date header (#3887) (436cadd1)

Features

• client:
  • add a TrySendError::error() method (#3885) (efa0b269)
  • add a TrySendError::message() method (#3884) (03fd6aff)
• error: add Error::is_shutdown() (#3863) (b8affd8a, closes #2745)
• server: add allow_multiple_spaces_in_request_line_delimiters http1 builder method (#3929) (9749184f)

v1.6.0 (2025-01-28)

Bug Fixes

• server:
  • start http1 header read timeout when conn is idle (#3828) (10b09ffc, closes #3780, #3781)
  • change max_local_error_reset_streams function to &mut self (#3820) (e981a91e)

Features

• ext: add ext::on_informational() callback extension (#3818) (8ce1fcfa, closes #2565)
• server: add http1::Builder::ignore_invalid_headers(bool) option (#3824) (3817a79b)

Breaking Changes

• http2::Builder::max_local_error_reset_streams() now takes &mut self and returns &mut Self. In practice, this shouldn't break almost anyone. It was the wrong receiver and return types. (e981a91e)

Highlights

Features

• rt: add Timer::now() method to allow overriding the instant returned (#3965) (5509ebe6)

Bug Fixes

• http1: fix rare missed write wakeup on connections (#3952) (2377b893)
• http2: fix internals of HTTP/2 CONNECT upgrades (#3967) (58e0e7dc, closes #3966)

Breaking Changes

While technically breaking, it's assumed you will not need to do anything or be affected.

• The HTTP/2 client connection no longer allows an executor
  that can not spawn itself.

  This was an oversight originally. The client connection will now include spawning
  a future that keeps a copy of the executor to spawn other futures. Thus, if it is
  !Send, it needs to spawn !Send futures. The likelihood of executors that match
  the previously allowed behavior should be very remote.

  There is also technically a semver break in here, which is that the
  Http2ClientConnExec trait no longer dyn-compatible, because it now expects to
  be Clone. This should not break usage of the conn builder, because it already
  separately had E: Clone bounds. If someone were using dyn Http2ClientConnExec,
  that will break. However, there is no purpose for doing so, and it is not usable
  otherwise, since the trait only exists to propagate bounds into hyper. Thus, the
  breakage should not affect anyone.
  (58e0e7dc)

What's Changed

• chore(ci): update to actions/checkout@v5 by @tottoto in #3935
• refactor(ffi): specify "C" ABI explicitly in ffi_fn! macro by @1911860538 in #3937
• Update documented default values for http1::Builder by @Will-Low in #3938
• fix(client): port tests to in-memory socket by @cratelyn in #3947
• feat: allow overriding the instant returned from Timer by @arielb1 in #3965
• fix(http1): poll_loop writes when ready by @lthiery in #3952
• test(ready_stream): replace tracing with printlns by @seanmonstar in #3973
• fix(http2): fix internals of HTTP/2 CONNECT upgrades by @seanmonstar in #3967
• Release v1.8.0 by @seanmonstar in #3974

New Contributors

• @Will-Low made their first contribution in #3938
• @arielb1 made their first contribution in #3965
• @lthiery made their first contribution in #3952

Highlights

Features

• client:
  • add a TrySendError::error() method (#3885) (efa0b269)
  • add a TrySendError::message() method (#3884) (03fd6aff)
• error: add Error::is_shutdown() (#3863) (b8affd8a, closes #2745)
• server: add allow_multiple_spaces_in_request_line_delimiters http1 builder method (#3929) (9749184f)

Bug Fixes

• server: improve caching accuracy of Date header (#3887) (436cadd1)

What's Changed

• chore: remove redundant backticks by @jimmycathy in #3855
• Gate tests with features they test by @WhyNotHugo in #3864
• docs(service): add HttpService documentation by @cratelyn in #3869
• docs(examples): alias Builder for clarity by @Muffeter in #3873
• docs(MAINTAINERS): add katelyn martin as collaborator by @seanmonstar in #3878
• chore(proto/h2): fix module-level documentation by @cratelyn in #3881
• feat(client): add a TrySendError::message() method by @cratelyn in #3884
• feat(client): add a TrySendError::error() method by @cratelyn in #3885
• fix(http2): add decriptive error for non-zero connect request by @samp5 in #3886
• refactor(lib): drop futures-util except in ffi by @hanna-kruppe in #3890
• fix(date): improve caching accuracy by @Patryk27 in #3887
• docs(SECURITY): update policy to use GSA drafts when reporting vulnerabilities by @seanmonstar in #3894
• feat: add Error::is_shutdown() by @joshka in #3863
• docs: improve ext module overview by @seanmonstar in #3921
• docs(rt): improve rt module overview by @seanmonstar in #3920
• chore(ci): update to cargo-check-external-types-0.3.0 by @tottoto in #3928
• test(common): add missing assertion in full_rewind test by @1911860538 in #3926
• fix(lib): avoid implicit cargo feature by @hanna-kruppe in #3931
• feat(http1): add allow_multiple_spaces_in_request_line_delimiters h1 builder config method by @mccordryan in #3929
• Prepare v1.7.0 by @seanmonstar in #3933

New Contributors

• @jimmycathy made their first contribution in #3855
• @Muffeter made their first contribution in #3873
• @samp5 made their first contribution in #3886
• @hanna-kruppe made their first contribution in #3890
• @Patryk27 made their first contribution in #3887
• @joshka made their first contribution in #3863
• @1911860538 made their first contribution in #3926
• @mccordryan made their first contribution in #3929

Full Changelog: v1.6.0...v1.7.0

Features

• ext: add ext::on_informational() callback extension (#3818) (8ce1fcfa, closes #2565)
• server: add http1::Builder::ignore_invalid_headers(bool) option (#3824) (3817a79b)

Bug Fixes

• server:
  • start http1 header read timeout when conn is idle (#3828) (10b09ffc, closes #3780, #3781)
  • change max_local_error_reset_streams function to &mut self (#3820) (e981a91e)

Breaking Changes

• http2::Builder::max_local_error_reset_streams() now takes &mut self and returns &mut Self. In practice, this shouldn't break almost anyone. It was the wrong receiver and return types.
  (e981a91e)

New Contributors

• @finnbear made their first contribution in #3820

Thanks

• @GlenDC
• @tottoto
• @seanmonstar

Full Changelog: v1.5.2...v1.6.0

Bug Fixes

• http1:
  • fix intermitent panic parsing partial headers (#3812) (a131111f, closes #3811)
  • skip debug assertion of content length for HEAD responses (#3795) (eaf2267c, closes #3794)

Features

• ffi: (unstable) add cargo-c support (#3787) (7f4a6826, closes #3786)

New Contributors

• @23doors made their first contribution in #3795
• @ionionascu made their first contribution in #3799
• @linyihai made their first contribution in #3800
• @suzp1984 made their first contribution in #3807

Thanks

• @seanmonstar

Full Changelog: v1.5.1...v1.5.2

Bug Fixes

• http1:
  • fix intermitent panic parsing partial headers (#3812) (a131111f, closes #3811)
  • skip debug assertion of content length for HEAD responses (#3795) (eaf2267c, closes #3794)

Features

• ffi: add cargo-c support (#3787) (7f4a6826, closes #3786)

Bug Fixes

• http2:
  • pass proper value to h2 max_local_error_reset_streams (4a20147a)
  • improve graceful shutdown during handshake (#3729) (13b05943)

v1.5.0 (2024-10-15)

Bug Fixes

• http1:
  • improve performance of parsing sequentially partial messages (#3764) (3900a23)
  • send 'connection: close' when connection is ending (#3725) (c86a6bcb, closes #3720)
  • make date_header effective (#3718) (7de02373)
• http2: strip content-length header in response to CONNECT requests (#3748) (67a4a498)

Features

• client: Add HTTP/2 builder options header_table_size() and max_concurrent_streams() (4c84e8c1)
• rt: add ReadBufCursor methods remaining() and put_slice() (#3700) (5a13041e)

Bug Fixes

• http1: reject final chunked if missing 0 (8e5de1bb)

v1.4.0 (2024-07-01)

Bug Fixes

• http2: stop removing "Trailer" header in HTTP/2 responses as per RFC 9110 (#3648) (a3269f7a)
• server: start header read timeout immediately (#3185) (0eb1b6cf)

Features

• client:
  • add SendRequest::try_send_request() method (#3691) (4ffaad53)
  • remove Send +Sync bounds requirement of http2::Connection executor (#3682) (56c3cd56)
  • remove 'static lifetime bound on http1/2 client IO (#3667) (9580b357)
• http1: add support for receiving trailer fields (#3637) (ac84af6b, closes #2703)
• server: add Builder::auto_date_header(bool) to allow disabling Date headers (721785ef)
• service: implement Service for reference types (#3607) (eade122d)

Bug Fixes

• client: revert auto content-length header for some requests (#3633)

v1.3.0 (2024-04-15)

Bug Fixes

• client: send content-length even with no body (172fdfaf)
• http2:
  • max_header_list_size(num) defaults to 16kb (203d1b09)
  • initial_max_send_streams defaults to 100 (2d1bd708)
• server:
  • avoid unwrapping for the Future impl of HTTP/1 UpgradeableConnection (#3627) (b79be911, closes #3621)
  • avoid graceful_shutdown panic on upgraded H1 connection (#3616) (6ecf8521)

Features

• client:
  • add max_header_list_size(num) to http2::Builder. (1c5b1b87)
  • add max_pending_accept_reset_streams HTTP2 option (#3617) (330ddf1d)
• ext: implement From ReasonPhrase for Bytes (dc27043a)
• service: expose Service and HttpService trait unconditionally (6aee2e6e)
• server: relax 'static from connection IO trait bounds (#3595) (0013bdda)

v1.2.0 (2024-02-21)

Bug Fixes

• http2: typo in trace logging (#3536) (79862ec2)
• rt: Sleep::downcast_mut_pin() no longer extend lifetime (7206fe30, closes #3556)

Features

• http1: support configurable max_headers(num) to client and server (#3523) (b1142448)
• http2:
  • add config for max_local_error_reset_streams in server (#3530) (d7680e30)
  • add initial_max_send_streams method to HTTP/2 client builder (#3524) (fdfa60d9)
  • add max_pending_accept_reset_streams(num) back to HTTP/2 server builder (#3507 (a9fa893f)

Breaking Changes

• The returned lifetime from Sleep::downcast_mut_pin() is no longer 'static. This shouldn't affect most usage. This sort of breaking change is needed because it is wrong.

(7206fe30)

v1.1.0 (2023-12-18)

Bug Fixes

• http1:
  • add internal limit for chunked extensions (#3495) (d71ff962)
  • reject chunked headers missing a digit (#3494) (82915386)

Features

• client: add http1::Connection without_shutdown() method (#3430) (210bfaa7)
• http1: Add support for sending HTTP/1.1 Chunked Trailer Fields (#3375) (31b41807, closes #2719)
• server: expose server::conn::http1::UpgradeableConnection (#3457) (6e3042a8)

This release "fixes" or adds a few things that should have been in 1.0.0, but were forgotten. Thus, it includes additions that would normally be a semver-minor release, but because it is so close to 1.0.0, it is released as a patch version.

Bug Fixes

• rt: implement Read/Write for Pin<P> (#3413) (dd6d81ca, closes #3412)

Features

• rt: Make ReadBuf::new public (7161f562)

Breaking Changes

• Pin is #[fundamental], so providing a Read/Write impl for it theoretically conflicts with existing user Read/Write for Pin<...> impls. However, those impls probably don't exist yet. (dd6d81ca)

v1.0.0 (2023-11-15)

Be sure to check out the upgrading guide.

Bug Fixes

• client:
  • avoid double-polling a Select future (#3290) (fece9f7f, closes #3289)
  • early server response shouldn't propagate NO_ERROR (#3275) (194e6f98, closes #2872)
  • remove Send bounds for request Body (#3266) (4ace340b, closes #3184)
• ffi: fix deadlock in hyper_executor::poll_next (#3370) (0c7d03ef, closes #3369)
• http2:
  • don't send keep-alive ping when idle (#3381) (429ad8a3)
  • change default server max concurrent streams to 200 (#3362) (dd638b5b, closes #3358)
• server: Respect Expect header only when http proto > 1.0 (#3294) (43d2f5c6)

Features

• client: allow !Send IO with HTTP/1 client (#3371) (cf87eda8, closes #3363)
• error:
  • Error::source() is purposefully unspecified (#3318) (502a6450, closes #2843)
  • change Display for Error to only print top error (#3312) (50f123af, closes #2844)
• ext:
  • make ReasonPhrase::from_static a const fn (d4a61e3d)
  • remove ReasonPhrase::from_bytes_unchecked() method (4021c57b)
• lib:
  • update to http 1.0 (899e92a5)
  • missing Timer will warn or panic (f3308c04, closes #3393)
  • increase MSRV to 1.63 (#3293) (e68dc961)
• rt: rename to Http2ClientConnExec and Http2ServerConnExec (52b27faa)
• server: default http1 header_read_timeout to 30 seconds (8bf26d1e)
• upgrade: introduce tracing as an optional unstable feature (#3326) (da3fc76c, closes #3319)

Breaking Changes

• Upgrade to http 1.0.

(899e92a5)

• (From previous RCs) ExecutorClient is renamed to Http2ClientConnExec, and Http2ConnExec is renamed to Http2ServerConnExec.

(52b27faa)

• If you use client HTTP/1 upgrades, you must call Connection::with_upgrades() to still work the same. (cf87eda8)

• HTTP/2 server builder now has a default max concurrent streams. This is a behavior change. Consider setting your own maximum. (dd638b5b)

• Do not build any logic depending on the exact types of an Error::source(). They are only for debugging. (502a6450)

• The format no longer prints the error chain. Be sure to check if you are logging errors directly.

  The Error::message() method is removed, it is no longer needed.

  The Error::into_cause() method is removed. (50f123af)

• The ReasonPhrase::from_bytes_unchecked() method is gone. Use from_static() or TryFrom to construct one.

(4021c57b)

Bug Fixes

• http1:
  • http1 server graceful shutdown fix (#3261) (f4b51300)
  • send error on Incoming body when connection errors (#3256) (52f19259, closes #3253)
  • properly end chunked bodies when it was known to be empty (#3254) (fec64cf0, closes #3252)

Features

• client: Make clients able to use non-Send executor (#3184) (d977f209, closes #3017)
• rt:
  • replace IO traits with hyper::rt ones (#3230) (f9f65b7a, closes #3110)
  • add downcast on Sleep trait (#3125) (d92d3917, closes #3027)
• service: change Service::call to take &self (#3223) (d894439e, closes #3040)

Breaking Changes

• Any IO transport type provided must now implement hyper::rt::{Read, Write} instead of tokio::io traits. You can grab a helper type from hyper-util to wrap Tokio types, or implement the traits yourself, if it's a custom type. (f9f65b7a)
• client::conn::http2 types now use another generic for an Executor. Code that names Connection needs to include the additional generic parameter. (d977f209)
• The Service::call function no longer takes a mutable reference to self. The FnMut trait bound on the service::util::service_fn function and the trait bound on the impl for the ServiceFn struct were changed from FnMut to Fn.

(d894439e)

Bug Fixes

• server: prevent sending 100-continue if user drops request body (#3137) (499fe1f9)

Features

• client:
  • add is_ready() and is_closed() methods to SendRequest (#3148) (3fb59919)
  • http2 builder now requires an Executor (#3135) (8068aa01, closes #3128)
  • remove unneeded HTTP/1 executor (#3108) (1de9accf)
• rt: make private executor traits public (but sealed) in rt::bounds (#3127) (fc9f3070, closes #2051, #3097)

Breaking Changes

• hyper::client::conn::Http2::Builder::new now requires an executor argument. (8068aa01)
• The method hyper::client::conn::http1::Builder::executor() is removed, since it did nothing. (1de9accf)

Bug Fixes

• client: send an error back to client when dispatch misbehaves () (75aac9f4, closes #2649)
• http2: Fix race condition in client dispatcher (#3041) (f202230c)

Features

• body: upgrade to http-body 1.0.0-rc.2 (#3106) (51b45e3f)
• client:
  • remove http2_ prefixes from client::conn::http2::Builder methods (669df217)
  • remove http1_ prefixes from client::conn::http1::Builder methods (4cbaef79)
  • implement Clone for http2::SendRequest (#3042) (00ea49e4, closes #3036)
  • allow ignoring HTTP/1 invalid header lines in requests (81e25fa8)
• rt: Clean up Timer trait (#3037) (8790fee7, closes #3028)
• server:
  • remove http1_ method prefixes from server::conn::http2::Builder (291ed0b4)
  • remove http1_ method prefixes from server::conn::http2::Builder (48e70c69)
  • remove server::conn::http2::Builder::with_executor() (#3089) (ab59a6f7, closes #3087)

Breaking Changes

• removes server::conn::http2::Builder::with_executor() (ab59a6f7)
• The return types of Timer have been changed. (8790fee7)
• The return types for Frame::into_data() and Frame::into_trailers() have been changed from Option<T> to Result<T, Self>.

Bug Fixes

• http1:
  • trim obs-folded headers when unfolding (#2926) (d4b5bd4e)

Features

• body:
  • rename Body struct to Incoming (#3022) (95a153bb, closes #2971)
  • update HttpBody trait to use Frames (#3020) (0888623d, closes #3010)
  • make body::Sender and Body::channel private (#2970) (d963e6a9, closes #2962)
  • remove "full" constructors from Body (#2958) (9e8fc8fc)
• client:
  • remove client::conn::{SendRequest, Connection} (#2987) (8ae73cac)
  • remove client::connect module (#2949) (5e206883)
  • remove higher-level hyper::Client (#2941) (bb3af17c)
  • remove hyper::client::server (#2940) (889fa2d8)
  • introduce version-specific client modules (#2906) (509672aa)
• ffi: add http1_allow_multiline_headers (#2918) (09e35668)
• lib: remove stream cargo feature (#2896) (ce72f734, closes #2855)
• rt: add Timer trait (#2974) (fae97ced)
• server:
  • remove server::conn::{Http, Connection} types (#3013) (0766d3f7, closes #3012)
  • server::conn::http1 and server::conn::http2 modules (#3011) (fc4d3356, closes #2851)
  • remove the high-level Server API (#2932) (3c7bef3b)
  • remove AddrStream struct (#2869) (e9cab49e, closes #2850)
• service: create own Service trait (#2920) (fee7d361, closes #2853)

Breaking Changes

• The polling functions of the Body trait have been redesigned.

  The free functions hyper::body::to_bytes and aggregate have been removed. Similar functionality is on http_body_util::BodyExt::collect. (0888623d)

• Either choose a version-specific Connection type, or look for the auto-version type in hyper-util. (0766d3f7)

• Pick a version-specific connection, or use the combined one in hyper-util. (8ae73cac)

• Change any manual impl tower::Service to implement hyper::service::Service instead. The poll_ready method has been removed. (fee7d361)

• The trait has been renamed. (031454e5)

• A channel body will be available in hyper-util. (d963e6a9)

• Use the types from http-body-util. (9e8fc8fc)

• Use connect from hyper-util. (5e206883)

• A pooling client is in the hyper-util crate. (bb3af17c)

• Tower Service utilities will exist in hyper-util. (889fa2d8)

Features

• server: add Builder::max_pending_accept_reset_streams(num) option (a24f0c0)

Bug Fixes

• http1: fix intermittent panic parsing partial headers (0f274ae)

New Contributors

• @cratelyn made their first contribution in #3796

Full Changelog: v0.14.31...v0.14.32

Bug Fixes

• http1: fix preserving header case without enabling ffi (#2820) (6a35c175)
• server: don't add implicit content-length to HEAD responses (#2836) (67b73138)

Features

• server:
  • add Connection::http2_max_header_list_size option (#2828) (a32658c1, closes #2826)
  • add AddrStream::local_addr() (#2816) (ffbf610b, closes #2773)

Breaking Changes

• ffi (unstable):
  • hyper_clientconn_options_new no longer sets the http1_preserve_header_case connection option by default. Users should now call hyper_clientconn_options_set_preserve_header_case if they desire that functionality. (78de8914)

Bug Fixes

• ffi: don't build C libraries by default (1c663706)

Features

• client: add HttpInfo::local_addr() method (055b4e7e, closes #2767)

Bug Fixes

• client: avoid panics in uses of Instant (#2746) (dcdd6d10)

Features

• client: implement the HTTP/2 extended CONNECT protocol from RFC 8441 (#2682) (5ec094ca)
• error: add Error::message (#2737) (6932896a, closes #2732)
• http1: implement obsolete line folding (#2734) (1f0c177b)

Bug Fixes

• http1: return 414 when URI contains more than 65534 characters (#2706) (5f938fff, closes #2701)
• http2: received Body::size_hint() now return 0 if implicitly empty (#2715) (84b78b6c)
• server: use case-insensitive comparison for Expect: 100-continue (#2709) (7435cc33, closes #2708)

Features

• http2: add http2_max_send_buf_size option to client and server (bff977b7)
• server: add HTTP/1 header read timeout option (#2675) (842c6553, closes #2457)

Bug Fixes

• client: cancel blocking DNS lookup if GaiFuture is dropped (174b553d

Features

• http1: add http1_writev(bool) options to Client and Server builders, to allow forcing vectored writes (80627141)
• upgrade: allow http upgrades with any body type (ab469eb3)

Bug Fixes

• client:
  • make ResponseFuture implement Sync (bd6c35b9)
  • remove ipv6 square brackets before resolving (910e0268)

Features

• h2: always include original h2 error on broken pipe (6169db25)
• server: Remove Send + Sync requirement for Body in with_graceful_shutdown (1d553e52)

Bug Fixes

• client: don't reuse a connection while still flushing (c88011da)
• server: convert panic to error if Connection::without_shutdown called on HTTP/2 conn (ea3e2282)

Features

• ffi: add hyper_request_set_uri_parts (a54689b9)
• lib:
  • Export more things with Cargo features (server, !http1, !http2) (0a4b56ac)
  • Export rt module independently of Cargo features (cf6f62c7)

Bug Fixes

• ffi: on_informational callback had no headers (39b6d01a)
• http1: apply header title case for consecutive dashes (#2613) (684f2fa7)
• http2: improve errors emitted by HTTP2 Upgraded stream shutdown (#2622) (be08648e)

Features

• client: expose http09 and http1 options on client::conn::Builder (#2611) (73bff4e9, closes #2461)

Bug Fixes

• client: retry when pool checkout returns closed HTTP2 connection (#2585) (52214f39)
• http2:
  • improve I/O errors emitted by H2Upgraded (#2598) (f51c677d)
  • preserve proxy-authenticate and proxy-authorization headers (#2597) (52435701)

Features

• ffi: add hyper_request_on_informational (25d18c0b)

Bug Fixes

• http1:
  • reject content-lengths that have a plus sign prefix (06335158)
  • protect against overflow in chunked decoder (efd9a982)

Features

• ffi: add option to get raw headers from response (8c89a8c1)

Bug Fixes

• http1: reduce memory used with flatten write strategy (eb0c6463)

Features

• client: allow to config http2 max concurrent reset streams (#2535) (b9916c41)
• error: add Error::is_parse_too_large and Error::is_parse_status methods (#2538) (960a69a5)
• http2:
  • Implement Client and Server CONNECT support over HTTP/2 (#2523) (5442b6fa, closes #2508)
  • allow HTTP/2 requests by ALPN when http2_only is unset (#2527) (be9677a1)

Performance

• http2: reduce amount of adaptive window pings as BDP stabilizes (#2550) (4cd06bf2)

Bug Fixes

• http1: http1_title_case_headers should move Builder (a303b3c3)

Features

• server: implement forgotten settings for case preserving (4fd6c4cb)

Features

• client: add option to allow misplaced spaces in HTTP/1 responses (#2506) (11345394)
• http1: add options to preserve header casing (#2480) (dbea7716, closes #2313)

Bug Fixes

• client: omit default port from automatic Host headers (#2441) (0b11eee9)
• headers: Support multiple Content-Length values on same line (#2471) (48fdaf16, closes #2470)
• server: skip automatic Content-Length headers when not allowed (#2216) (8cbf9527, closes #2215)

Features

• client: allow HTTP/0.9 responses behind a flag (#2473) (68d4e4a3, closes #2468)
• server: add AddrIncoming::from_listener constructor (#2439) (4c946af4)

Bug Fixes

• build: Fix compile error when only http1 feature was enabled.

Bug Fixes

• client: HTTP/1 client "Transfer-Encoding" repair code would panic (#2410) (2c8121f1, closes #2409)
• http1: fix server misinterpreting multiple Transfer-Encoding headers (8f93123e)

Features

• body:
  • reexport hyper::body::SizeHint (#2404) (9956587f)
  • add send_trailers to Body channel's Sender (#2387) (bf8d74ad, closes #2260)
• ffi:
  • add HYPERE_INVALID_PEER_MESSAGE error code for parse errors (1928682b)
  • Initial C API for hyper (3ae1581a)

Features

• client: expose connect types without proto feature (#2377) (73a59e5f)
• server: expose Accept without httpX features (#2382) (a6d4fcbe)

• Fixes building documentation.

v0.14.0 (2020-12-23)

Bug Fixes

• client: log socket option errors instead of returning error (#2361) (dad5c879, closes #2359)
• http1:
  • ignore chunked trailers (#2357) (1dd761c8, closes #2171)
  • ending close-delimited body should close (#2322) (71f34024)

Features

• client:
  • change DNS Resolver to resolve to SocketAddrs (#2346) (b4e24332, closes #1937)
  • Make client an optional feature (4e55583d)
• http1: Make HTTP/1 support an optional feature (2a19ab74)
• http2: Make HTTP/2 support an optional feature (b819b428)
• lib:
  • Upgrade to Tokio 1.0, Bytes 1.0, http-body 0.4 (#2369) (fad42acc, closes #2370)
  • remove dependency on tracing's log feature (#2342) (db32e105, closes #2326)
  • disable all optional features by default (#2336) (ed2b22a7)
• server: Make the server code an optional feature (#2334) (bdb5e5d6)
• upgrade: Moved HTTP upgrades off Body to a new API (#2337) (121c3313, closes #2086)

Breaking Changes

• hyper depends on tokio v1 and bytes v1.

• Custom resolvers used with HttpConnector must change to resolving to an iterator of SocketAddrs instead of IpAddrs. (b4e24332)

• hyper no longer emits log records automatically. If you need hyper to integrate with a log logger (as opposed to tracing), you can add tracing = { version = "0.1", features = ["log"] } to activate them. (db32e105)

• Removed http1_writev methods from client::Builder, client::conn::Builder, server::Builder, and server::conn::Builder.

  Vectored writes are now enabled based on whether the AsyncWrite implementation in use supports them, rather than though adaptive detection. To explicitly disable vectored writes, users may wrap the IO in a newtype that implements AsyncRead and AsyncWrite and returns false from its AsyncWrite::is_write_vectored method. (d6aadb83)

• The method Body::on_upgrade() is gone. It is essentially replaced with hyper::upgrade::on(msg). (121c3313)

• All optional features have been disabled by default. (ed2b22a7)

• The HTTP server code is now an optional feature. To enable the server, add features = ["server"] to the dependency in your Cargo.toml. (bdb5e5d6)

• The HTTP client of hyper is now an optional feature. To enable the client, add features = ["client"] to the dependency in your Cargo.toml. (4e55583d)

• This puts all HTTP/1 methods and support behind an http1 cargo feature, which will not be enabled by default. To use HTTP/1, add features = ["http1"] to the hyper dependency in your Cargo.toml.

(2a19ab74)

• This puts all HTTP/2 methods and support behind an http2 cargo feature, which will not be enabled by default. To use HTTP/2, add features = ["http2"] to the hyper dependency in your Cargo.toml.

(b819b428)

Bug Fixes

• client: fix panic when addrs in ConnectingTcpRemote is empty (#2292) (01103da5, closes #2291)
• http2: reschedule keep alive interval timer once a pong is received (2a938d96, closes #2310)

Features

• client:
  • add HttpConnector::set_local_addresses to set both IPv6 and IPv4 local addrs ( (fb19f3a8)
  • Add accessors to Connected fields (#2290) (2dc9768d)

Bug Fixes

• http1: return error if user body ends prematurely (1ecbcbb1, closes #2263)

Features

• lib: Setting http1_writev(true) will now force writev queue usage (187c22af, closes #2282)
• server: implement AsRawFd for AddrStream (#2246) (b5d5e214, closes #2245)

Bug Fixes

• client: don't panic in DNS resolution when task cancelled (#2229) (0d0d3635)

Features

• client: impl tower_service::Service for &Client (#2089) (77c3b5bc)
• http2: configure HTTP/2 frame size in the high-level builders too (#2214) (2354a7ee)
• lib: Move from log to tracing in a backwards-compatible way (#2204) (9832aef9)