tower-http-client

Extra Tower middlewares and utilities for HTTP clients.

Warning

This crate is currently in early stage of development and is not ready for production use.

Example

use http::{header::USER_AGENT, HeaderValue};
use http_body_util::BodyExt;
use serde_json::Value;
use tower::{ServiceBuilder, ServiceExt};
use tower_http::ServiceBuilderExt;
use tower_http_client::util::HttpClientExt;
use tower_reqwest::HttpClientLayer;

/// Implementation agnostic HTTP client.
type HttpClient = tower::util::BoxCloneService<
    http::Request<reqwest::Body>,
    http::Response<reqwest::Body>,
    anyhow::Error,
>;

/// Creates HTTP client with Tower layers on top of the given client.
fn make_client(client: reqwest::Client) -> HttpClient {
    ServiceBuilder::new()
        // Add some layers.
        .override_request_header(USER_AGENT, HeaderValue::from_static("tower-http-client"))
        // Make client compatible with the `tower-http` layers.
        .layer(HttpClientLayer)
        .service(client)
        .map_err(anyhow::Error::from)
        .boxed_clone()
}

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    // Create a new client
    let client = make_client(reqwest::Client::new());
    // Execute request by using this service.
    let response = client
        .execute(
            http::request::Builder::new()
                .method(http::Method::GET)
                .uri("http://ip.jsontest.com")
                .body(reqwest::Body::default())?,
        )
        .await?;

    let bytes = response.into_body().collect().await?.to_bytes();
    let value: Value = serde_json::from_slice(&bytes)?;
    println!("{value:#?}");

    Ok(())
}