CHANGELOG.md

1.4.0 (November 24, 2025)

• Add StatusCode::EARLY_HINTS constant for 103 Early Hints.
• Make StatusCode::from_u16 now a const fn.
• Make Authority::from_static now a const fn.
• Make PathAndQuery::from_static now a const fn.
• MSRV increased to 1.57 (allows legible const fn panic messages).

1.3.1 (March 11, 2025)

• Fix validation that all characters are UTF-8 in URI path and query.

1.3.0 (March 11, 2025)

• Allow most UTF-8 characters in URI path and query.
• Fix HeaderMap::reserve() to allocate sufficient capacity.

1.2.0 (December 3, 2024)

• Add StatusCode::TOO_EARLY constant for 425 status.
• Loosen TryFrom<HashMap> for HeaderMap to work with any state generic.
• Change Builder methods to use TryInto instead of TryFrom arguments.
• Make StatusCode::as_u16 a const function.
• Fix Method parsing to allow #$%&' characters.
• Fix HeaderName parsing to reject " characters.
• Fix off by 1 error in Method::from_bytes that could cause extra allocations.

1.1.0 (March 4, 2024)

• Add methods to allow trying to allocate in the HeaderMap, returning an error if oversize instead of panicking.
• Add Extensions::get_or_insert() method.
• Implement From<Uri> for uri::Builder.
• Fix HeaderName::from_lowercase that could allow NUL bytes in some cases.

1.0.0 (November 15, 2023)

• Implement Clone for Request, Response, and Extensions. This breaking change requires that all extensions now implement Clone.
• Add a default-on std feature. Disabling it currently is not supported.
• Fix MIRI warnings in HeaderMap::iter().

0.2.10 (November 10, 2023)

• Fix parsing of Authority to handle square brackets in incorrect order.
• Fix HeaderMap::with_capacity() to handle arithmetic overflow.

0.2.9 (February 17, 2023)

• Add HeaderName constants for cache-status and cdn-cache-control.
• Implement Hash for PathAndQuery.
• Re-export HeaderName at crate root.

0.2.8 (June 6, 2022)

• Fix internal usage of uninitialized memory to use MaybeUninit inside HeaderName.

0.2.7 (April 28, 2022)

• MSRV bumped to 1.49.
• Add extend() method to Extensions.
• Add From<Authority> and From<PathAndQuery> impls for Uri.
• Make HeaderName::from_static a const fn.

0.2.6 (December 30, 2021)

• Upgrade internal itoa dependency to 1.0.

0.2.5 (September 21, 2021)

• Add is_empty() and len() methods to Extensions.
• Add version_ref() method to request::Builder.
• Implement TryFrom<Vec<u8>> and TryFrom<String> for Authority, Uri, PathAndQuery, and HeaderName.
• Make HeaderValue::from_static a const fn.

0.2.4 (April 4, 2021)

• Fix Uri parsing to allow {, ", and } in paths.

0.2.3 (January 7, 2021)

• Upgrade internal (private) bytes dependency to 1.0.

0.2.2 (December 14, 2020)

• Fix (potential double) panic of (HeaderMap) OccupiedEntry::remove_entry and remove_entry_mult when multiple values are present. (#446, #449 dekellum)
• Safety audits of (priv) ByteStr and refactor of Authority (#408, #414 sbosnick)
• Fix HeaderName to error instead of panic when input is too long (#432 #433 acfoltzer)
• Allow StatusCode to encode values 100-999 without error. Use of the unclassified range 600-999 remains discouraged. (#144, #438, #443 quininer dekellum)
• Add String and &String fallible conversions to PathAndQuery (#450 mkindahl)
• Fix Authority (and Uri) to error instead of panic on unbalanced brackets (#435, #445 aeryz)

0.2.1 (March 25, 2020)

• Add extensions_ref and extensions_mut to request::Builder and response::Builder.

0.2.0 (December 2, 2019)

• Add Version::HTTP_3 constant.
• Add HeaderValue::from_maybe_shared, HeaderValue::from_maybe_shared_unchecked, Uri::from_maybe_shared, Authority::from_maybe_shared, and PathAndQuery::from_maybe_shared.
• Change request::Builder, response::Builder, and uri::Builder to use by-value methods instead of by-ref.
• Change from HttpTryFrom trait to std::convert::TryFrom.
• Change HeaderMap::entry to no longer return a Result.
• Change HeaderMap::drain iterator to match the behavior of IntoIter.
• Change Authority::port to return an Option<Port> instead of Option<u16>.
• Change Uri::scheme to return Option<&Scheme> instead of Option<&str>.
• Change Uri::authority to return Option<&Authority> instead of Option<&str>.
• Remove InvalidUriBytes, InvalidHeaderNameBytes, and InvalidHeaderValueBytes error types.
• Remove HeaderValue::from_shared, HeaderValue::from_shared_unchecked, Uri::from_shared, Authority::from_shared, Scheme::from_shared, and PathAndQuery::from_shared.
• Remove Authority::port_part.
• Remove Uri::scheme_part and Uri::authority_part.

0.1.20 (November 26, 2019)

• Fix possible double-free if header::Drain iterator is std::mem::forgoten (#357).
• Fix possible data race if multiple header::ValueDrains are iterated on different threads (#362).
• Fix HeaderMap::reserve capacity overflows (#360).
• Fix parsing long authority-form Uris (#351).

0.1.19 (October 15, 2019)

• Allow % in IPv6 addresses in Uri (#343).

0.1.18 (July 26, 2019)

• Fix compilation of HeaderName parsing on WASM targets (#324).
• Implement HttpTryFrom<HashMap> for HeaderMap (#326).
• Export http::header::HeaderValue as http::HeaderValue.

0.1.17 (April 5, 2019)

• Add Error::inner_ref() to view the kind of error (#303)
• Add headers_ref() and headers_mut() methods to request::Builder and response::Builder (#293)

0.1.16 (February 19, 2019)

• Fix Uri to permit more characters in the path (#296)

0.1.15 (January 22, 2019)

• Fix Uri::host() to include brackets of IPv6 literals (#292)
• Add scheme_str and port_u16 methods to Uri (#287)
• Add method_ref, uri_ref, and headers_ref to request::Builder (#284)

0.1.14 (November 21, 2018)

• Add Port struct (#252, #255, #265)
• Introduce Uri builder (#219)
• Empty Method no longer considered valid (#262)
• Fix Uri equality when terminating question mark is present (#270)
• Allow % character in userinfo (#269)
• Support additional tokens for header names (#271)
• Export http::headers::{IterMut, ValuesMut} (#278)

0.1.13 (September 14, 2018)

• impl fmt::Display for HeaderName (#249)
• Fix uri::Authority parsing when there is no host after an @ (#248)
• Fix Uri parsing to allow more characters in query strings (#247)

0.1.12 (September 7, 2018)

• Fix HeaderValue parsing to allow HTABs (#244)

0.1.11 (September 5, 2018)

• Add From<&Self> for HeaderValue, Method, and StatusCode (#238)
• Add Uri::from_static (#240)

0.1.10 (August 8, 2018)

• impl HttpTryFrom<String> for HeaderValue (#236)

0.1.9 (August 7, 2018)

• Fix double percent encoding (#233)
• Add additional HttpTryFrom impls (#234)

0.1.8 (July 23, 2018)

• Add fuller set of PartialEq for Method (#221)
• Reduce size of HeaderMap by using Box<[Entry]> instea of Vec (#224)
• Reduce size of Extensions by storing as Option<Box<AnyMap>> (#227)
• Implement Iterator::size_hint for most iterators in header (#226)

0.1.7 (June 22, 2018)

• Add From<uN> for HeaderValue for most integer types (#218).
• Add Uri::into_parts() inherent method (same as Parts::from(uri)) (#214).
• Fix converting Uris in authority-form to Parts and then back into Uri (#216).
• Fix Authority parsing to reject multiple port sections (#215).
• Fix parsing 1 character authority-form Uris into illegal forms (#220).

0.1.6 (June 13, 2018)

• Add HeaderName::from_static() constructor (#195).
• Add Authority::from_static() constructor (#186).
• Implement From<HeaderName> for HeaderValue (#184).
• Fix duplicate keys when iterating over header::Keys (#201).

0.1.5 (February 28, 2018)

• Add websocket handshake related header constants (#162).
• Parsing Authority with an empty string now returns an error (#164).
• Implement PartialEq<u16> for StatusCode (#153).
• Implement HttpTryFrom<&Uri> for Uri (#165).
• Implement FromStr for Method (#167).
• Implement HttpTryFrom<String> for Uri (#171).
• Add into_body fns to Request and Response (#172).
• Fix Request::options (#177).

0.1.4 (January 4, 2018)

• Add PathAndQuery::from_static (#148).
• Impl PartialOrd / PartialEq for Authority and PathAndQuery (#150).
• Add map fn to Request and Response (#151).

0.1.3 (December 11, 2017)

• Add Scheme associated consts for common protos.

0.1.2 (November 29, 2017)

• Add Uri accessor for scheme part.
• Fix Uri parsing bug (#134)

0.1.1 (October 9, 2017)

• Provide Uri accessors for parts (#129)
• Add Request builder helpers. (#123)
• Misc performance improvements (#126)

0.1.0 (September 8, 2017)

• Initial release.