web-faith

A browser-shaped HTTP client.

Faith behaves like a browser ("faithfully") wherever that translates to a server-side runtime: transparent HTTP/2 and HTTP/3 upgrades, Happy Eyeballs across IPv4 and IPv6, DNS caching, an optional cookie jar, and HTTP caching. We also publish the reusable components as separate crates.

Usage

cargo add web-faith

use web_faith::{FaithError, agent::Agent};

#[tokio::main]
async fn main() -> Result<(), FaithError> {
	let agent = Agent::new()?;
	let body = agent.fetch("https://example.com/").await?.text().await?;
	println!("{body}");
	Ok(())
}

HTTP/3 is opt-in

Faith uses reqwest internally, and its HTTP/3 support is currently unstable. To enable HTTP/3 support, you will need to set the http3 feature on Faith, and use the reqwest_unstable rustc cfg flag:

cargo add web-faith -F http3

# .cargo/config.toml
[build]
rustflags = ["--cfg", "reqwest_unstable"]

Features

Feature	Default	What it adds
`cache`	✓	The HTTP cache.
`connection-tracking`	✓	Kernel connection counters.
`cookies`	✓	The cookie jar.
`dns`	✓	Faith's own caching resolver. Without it, names resolve through the platform.
`encoding`	✓	Content codings for request and response bodies.
`tls-aws-lc-rs`	✓	aws-lc-rs as the rustls crypto provider.
`tls-ring`		ring as the rustls crypto provider instead.
`http3`		Transparent HTTP/3, upgraded into via Alt-Svc. Needs the cfg flag above.
`raw-client`		Access to the reqwest client underneath.
`unstable-internals`		Faith's internals. Permanently unstable and exempt from semver.

Component crates

Elsewhere

Faith is also a Node.js module which lets you use this Rust networking stack as a fetch drop-in replacement: @passcod/faith.

Licence

Apache-2.0 or MIT.