Pure Ruby, framework and transport agnostic, implementation of HTTP/2 protocol and HPACK header compression with support for:


* [Binary framing](https://hpbn.co/http2/#binary-framing-layer) parsing and encoding
* [Stream multiplexing](https://hpbn.co/http2/#streams-messages-and-frames) and [prioritization](https://hpbn.co/http2/#stream-prioritization)
* Connection and stream [flow control](https://hpbn.co/http2/#flow-control)
* [Header compression](https://hpbn.co/http2/#header-compression) and [server push](https://hpbn.co/http2/#server-push)
* Connection and stream management
* And more... see [API docs](https://www.rubydoc.info/gems/http-2)

Protocol specifications:

* [Hypertext Transfer Protocol Version 2 (RFC 7540)](https://httpwg.github.io/specs/rfc7540.html)
* [HPACK: Header Compression for HTTP/2 (RFC 7541)](https://httpwg.github.io/specs/rfc7541.html)

## 1.1.0

Several changes which improved performance for the common cases. A few highlights:

* Opting into ruby 3.4 features when possible (such as `String#append_as_bytes` instead of `String#<<`)
* reducing string and array allocations on several places (connection management, frame generation, hpack header compression, etc)
* "streams recently closed" not having to regenerate the list when not necessary

## 1.0.2

### Improvements

* Freezing static tables (used for header huffman coding) correctly. This makes them shareable, which makes `http-2` usable across ractors.
* Moved buffer helpers from String refinements into mixins. Refinements impose a relevant performance penalty, unfortunately, despite its cleaner API.

## 1.0.1

### Improvements

* discard closed streams from the connection (reduces memory consumption).

### Bugfixes

* allow RST_STREAM frames to be ignored on closed streams.
* prevent already closed streams from being initialized again.