1 stable release

2.3.3 Apr 8, 2023

#155 in HTTP client

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154 downloads per month
Used in 13 crates (3 directly)


1.5K SLoC


Asynchronous HTTP/1.1 parser.


$ cargo add async-h1


This crate uses #![forbid(unsafe_code)] to ensure everything is implemented in 100% Safe Rust.

Minimum Supported Rust Version

Given the rapidly-improving nature of async Rust, async-h1 only guarantees it will work on the latest stable Rust compiler. Currently async-h1 compiles on rustc 1.40.0 and above, but we reserve the right to upgrade the minimum Rust version outside of major releases. If upgrading stable compiler versions is an issue we recommend pinning the version of async-h1.


Want to join us? Check out our "Contributing" guide and take a look at some of these issues:


Licensed under either of Apache License, Version 2.0 or MIT license at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this crate by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.


~252K SLoC