Fibre HTTP

fibre_http is an HTTP client for Rust that works the same way from async code and from blocking code. You make an AsyncClient or a SyncClient. to_sync() and to_async() turn one into the other for free. Both share one connection pool, so a thread and a task can use the same HTTP/2 connection.

A blocking call does its own I/O on its own thread, so there is no background runtime to start. You can begin a request in async code and read the body on a blocking thread.

It speaks HTTP/1.1 with keep-alive and HTTP/2 with multiplexing. TLS is rustls by default, with native-tls as an option. Proxies, redirects, retries, per-request deadlines and streamed request bodies are built in.

use fibre_http::AsyncClient;

let client = AsyncClient::new();
let page = client.get("https://example.com/").send().await?.text().await?;

let blocking = client.clone().to_sync();
let page = tokio::task::spawn_blocking(move || blocking.get("https://example.com/").send()?.text()).await.unwrap()?;

Requests a second for 64-byte GETs to a local hyper server with N concurrent callers, on an Apple M4 Pro. Higher is better. hyper is the low-level client most Rust HTTP clients are built on, so it is shown as a yardstick and not ranked.