Async::HTTP

An asynchronous client and server implementation of HTTP/1.0, HTTP/1.1 and HTTP/2 including TLS. Support for streaming requests and responses. Built on top of async, io-endpoint and io-stream. falcon provides a rack-compatible server.

Usage

Please see the project documentation for more details.

• Getting Started - This guide explains how to get started with Async::HTTP.

• Testing - This guide explains how to use Async::HTTP clients and servers in your tests.

Releases

Please see the project releases for all releases.

v0.101.0

• Handle remote disconnects in Async::HTTP::Protocol::HTTP1::Server#each without reporting them as server failures.

v0.100.0

• Added transport-neutral TLS configuration support to Async::HTTP::Endpoint.

v0.99.0

• Retry safe requests when a remote HTTP/2 endpoint resets the stream with INTERNAL_ERROR before returning a response.

v0.98.1

• Probe idle HTTP/1 connections before reuse, avoiding requests on connections already closed by the peer.

v0.98.0

• Rewind request bodies before retrying requests.

v0.97.0

• Exposed all supported protocol names from the plaintext HTTP protocol negotiator.

v0.96.0

• Made metrics and traces optional runtime dependencies. Applications that use the providers should depend on the corresponding gem and require the provider explicitly.

v0.95.1

• Fix handling of reset stream causing complete connection failure.

v0.95.0

• Use Protocol::HTTP::RefusedError for safe retry of requests not processed by the server, including non-idempotent methods like PUT.
  • Remove Async::HTTP::Protocol::RequestFailed in favour of Protocol::HTTP::RefusedError.
  • HTTP/1: Delegate request write failure handling to protocol-http1.
  • HTTP/2: Handle GOAWAY and REFUSED_STREAM via protocol-http2, enabling automatic retry of unprocessed requests.

v0.94.3

• Fix response body leak in HTTP/2 server when stream is reset before send_response completes (e.g. client-side gRPC cancellation). The response body's close was never called, leaking any resources tied to body lifecycle (such as rack.response_finished callbacks and utilization metrics).

See Also

• benchmark-http — A benchmarking tool to report on web server concurrency.
• falcon — A rack compatible server built on top of async-http.
• async-websocket — Asynchronous client and server websockets.
• async-rest — A RESTful resource layer built on top of async-http.
• async-http-faraday — A faraday adapter to use async-http.

Contributing

We welcome contributions to this project.

1. Fork it.
2. Create your feature branch (git checkout -b my-new-feature).
3. Commit your changes (git commit -am 'Add some feature').
4. Push to the branch (git push origin my-new-feature).
5. Create new Pull Request.

Running Tests

To run the test suite:

bundle exec sus

Making Releases

To make a new release:

bundle exec bake gem:release:patch # or minor or major

Developer Certificate of Origin

In order to protect users of this project, we require all contributors to comply with the Developer Certificate of Origin. This ensures that all contributions are properly licensed and attributed.

Community Guidelines

This project is best served by a collaborative and respectful environment. Treat each other professionally, respect differing viewpoints, and engage constructively. Harassment, discrimination, or harmful behavior is not tolerated. Communicate clearly, listen actively, and support one another. If any issues arise, please inform the project maintainers.