feat: make HttpClient dyn-clonable

Kinda reverts http-rs#48

Related to http-rs/surf#237

Desirable for Surf-level config.

Cargo.toml

@@ -57,6 +57,8 @@ hyper = { version = "0.13.6", features = ["tcp"], optional = true }
 hyper-tls = { version = "0.4.3", optional = true }
 futures-util = { version = "0.3.5", features = ["io"], optional = true }
 tokio = { version = "0.2", features = ["time"], optional = true }
+dyn-clone = "1.0.4"
+dyn-clonable = "0.9.0"
 
 # curl_client
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]

src/h1/mod.rs

@@ -40,7 +40,8 @@ type HttpPool = DashMap<SocketAddr, Pool<TcpStream, std::io::Error>>;
 #[cfg(any(feature = "native-tls", feature = "rustls"))]
 type HttpsPool = DashMap<SocketAddr, Pool<TlsStream<TcpStream>, Error>>;
 
-/// Async-h1 based HTTP Client, with connecton pooling ("Keep-Alive").
+/// Async-h1 based HTTP Client, with connection pooling ("Keep-Alive").
+#[derive(Clone)]
 pub struct H1Client {
     http_pools: HttpPool,
     #[cfg(any(feature = "native-tls", feature = "rustls"))]

src/hyper.rs

@@ -7,6 +7,7 @@ use std::fmt::Debug;
 use std::io;
 use std::str::FromStr;
 
+use dyn_clonable::*;
 use futures_util::stream::TryStreamExt;
 use http_types::headers::{HeaderName, HeaderValue};
 use http_types::StatusCode;
@@ -21,7 +22,8 @@ use super::{async_trait, Error, HttpClient, Request, Response};
 type HyperRequest = hyper::Request<hyper::Body>;
 
 // Avoid leaking Hyper generics into HttpClient by hiding it behind a dynamic trait object pointer.
-trait HyperClientObject: Debug + Send + Sync + 'static {
+#[clonable]
+trait HyperClientObject: Clone + Debug + Send + Sync + 'static {
     fn dyn_request(&self, req: hyper::Request<hyper::Body>) -> hyper::client::ResponseFuture;
 }
 
@@ -32,7 +34,7 @@ impl<C: Clone + Connect + Debug + Send + Sync + 'static> HyperClientObject for h
 }
 
 /// Hyper-based HTTP Client.
-#[derive(Debug)]
+#[derive(Clone, Debug)]
 pub struct HyperClient {
     client: Box<dyn HyperClientObject>,
     config: Config,

src/isahc.rs

@@ -13,7 +13,7 @@ use crate::Config;
 use super::{async_trait, Body, Error, HttpClient, Request, Response};
 
 /// Curl-based HTTP Client.
-#[derive(Debug)]
+#[derive(Clone, Debug)]
 pub struct IsahcClient {
     client: isahc::HttpClient,
     config: Config,

src/lib.rs

@@ -48,6 +48,8 @@ pub type Request = http_types::Request;
 /// An HTTP Response type with a streaming body.
 pub type Response = http_types::Response;
 
+use dyn_clonable::*;
+
 pub use async_trait::async_trait;
 pub use http_types;
 
@@ -64,7 +66,8 @@ pub use http_types;
 /// though middleware for one of its own requests, and in order to do so should be wrapped in an
 /// `Rc`/`Arc` to enable reference cloning.
 #[async_trait]
-pub trait HttpClient: std::fmt::Debug + Unpin + Send + Sync + 'static {
+#[clonable]
+pub trait HttpClient: Clone + std::fmt::Debug + Unpin + Send + Sync + 'static {
     /// Perform a request.
     async fn send(&self, req: Request) -> Result<Response, Error>;
 

src/wasm.rs

@@ -9,7 +9,7 @@ use std::pin::Pin;
 use std::task::{Context, Poll};
 
 /// WebAssembly HTTP Client.
-#[derive(Debug)]
+#[derive(Clone, Debug)]
 pub struct WasmClient {
     _priv: (),
 }