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feat(client): remove hyper::client::server (#2940)

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BREAKING CHANGE: Tower `Service` utilities will exist in `hyper-util`.
This commit is contained in:
Sean McArthur
2022-08-12 13:54:45 -07:00
committed by GitHub
parent cd32454403
commit 889fa2d872
6 changed files with 0 additions and 198 deletions
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5
Cargo.toml
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@@ -181,11 +181,6 @@ name = "state"
path = "examples/state.rs"
required-features = ["full"]
[[example]]
name = "tower_client"
path = "examples/tower_client.rs"
required-features = ["full"]
[[example]]
name = "tower_server"
path = "examples/tower_server.rs"

59
examples/tower_client.rs
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@@ -1,59 +0,0 @@
#![deny(warnings)]
use std::future::Future;
use std::pin::Pin;
use std::task::{Context, Poll};
use hyper::service::Service;
use hyper::{Body, Request, Response};
use tokio::net::TcpStream;
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync + 'static>> {
pretty_env_logger::init();
let uri = "http://127.0.0.1:8080".parse::<http::Uri>()?;
let mut svc = Connector;
let body = Body::empty();
let req = Request::get(uri).body(body)?;
let res = svc.call(req).await?;
println!("RESPONSE={:?}", res);
Ok(())
}
struct Connector;
impl Service<Request<Body>> for Connector {
type Response = Response<Body>;
type Error = Box<dyn std::error::Error + Send + Sync + 'static>;
type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>>>>;
fn poll_ready(&mut self, _cx: &mut Context<'_>) -> std::task::Poll<Result<(), Self::Error>> {
Poll::Ready(Ok(()))
}
fn call(&mut self, req: Request<Body>) -> Self::Future {
Box::pin(async move {
let host = req.uri().host().expect("no host in uri");
let port = req.uri().port_u16().expect("no port in uri");
let stream = TcpStream::connect(format!("{}:{}", host, port)).await?;
let (mut sender, conn) = hyper::client::conn::handshake(stream).await?;
tokio::task::spawn(async move {
if let Err(err) = conn.await {
println!("Connection error: {:?}", err);
}
});
let res = sender.send_request(req).await?;
Ok(res)
})
}
}

1
src/client/mod.rs
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@@ -40,5 +40,4 @@ cfg_feature! {
pub mod conn;
pub(super) mod dispatch;
mod pool;
pub mod service;
}

89
src/client/service.rs
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@@ -1,89 +0,0 @@
//! Utilities used to interact with the Tower ecosystem.
//!
//! This module provides `Connect` which hook-ins into the Tower ecosystem.
use std::error::Error as StdError;
use std::future::Future;
use std::marker::PhantomData;
use tracing::debug;
use super::conn::{Builder, SendRequest};
use crate::{
body::HttpBody,
common::{task, Pin, Poll},
service::{MakeConnection, Service},
};
/// Creates a connection via `SendRequest`.
///
/// This accepts a `hyper::client::conn::Builder` and provides
/// a `MakeService` implementation to create connections from some
/// target `T`.
#[derive(Debug)]
pub struct Connect<C, B, T> {
inner: C,
builder: Builder,
_pd: PhantomData<fn(T, B)>,
}
impl<C, B, T> Connect<C, B, T> {
/// Create a new `Connect` with some inner connector `C` and a connection
/// builder.
pub fn new(inner: C, builder: Builder) -> Self {
Self {
inner,
builder,
_pd: PhantomData,
}
}
}
impl<C, B, T> Service<T> for Connect<C, B, T>
where
C: MakeConnection<T>,
C::Connection: Unpin + Send + 'static,
C::Future: Send + 'static,
C::Error: Into<Box<dyn StdError + Send + Sync>> + Send,
B: HttpBody + Unpin + Send + 'static,
B::Data: Send + Unpin,
B::Error: Into<Box<dyn StdError + Send + Sync>>,
{
type Response = SendRequest<B>;
type Error = crate::Error;
type Future =
Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send + 'static>>;
fn poll_ready(&mut self, cx: &mut task::Context<'_>) -> Poll<Result<(), Self::Error>> {
self.inner
.poll_ready(cx)
.map_err(|e| crate::Error::new(crate::error::Kind::Connect).with(e.into()))
}
fn call(&mut self, req: T) -> Self::Future {
let builder = self.builder.clone();
let io = self.inner.make_connection(req);
let fut = async move {
match io.await {
Ok(io) => match builder.handshake(io).await {
Ok((sr, conn)) => {
builder.exec.execute(async move {
if let Err(e) = conn.await {
debug!("connection error: {:?}", e);
}
});
Ok(sr)
}
Err(e) => Err(e),
},
Err(e) => {
let err = crate::Error::new(crate::error::Kind::Connect).with(e.into());
Err(err)
}
}
};
Box::pin(fut)
}
}

39
src/service/make.rs
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@@ -1,39 +0,0 @@
use tokio::io::{AsyncRead, AsyncWrite};
use super::Service;
use crate::common::{task, Future, Poll};
// The same "trait alias" as tower::MakeConnection, but inlined to reduce
// dependencies.
pub trait MakeConnection<Target>: self::sealed::Sealed<(Target,)> {
type Connection: AsyncRead + AsyncWrite;
type Error;
type Future: Future<Output = Result<Self::Connection, Self::Error>>;
fn poll_ready(&mut self, cx: &mut task::Context<'_>) -> Poll<Result<(), Self::Error>>;
fn make_connection(&mut self, target: Target) -> Self::Future;
}
impl<S, Target> self::sealed::Sealed<(Target,)> for S where S: Service<Target> {}
impl<S, Target> MakeConnection<Target> for S
where
S: Service<Target>,
S::Response: AsyncRead + AsyncWrite,
{
type Connection = S::Response;
type Error = S::Error;
type Future = S::Future;
fn poll_ready(&mut self, cx: &mut task::Context<'_>) -> Poll<Result<(), Self::Error>> {
Service::poll_ready(self, cx)
}
fn make_connection(&mut self, target: Target) -> Self::Future {
Service::call(self, target)
}
}
mod sealed {
pub trait Sealed<X> {}
}

5
src/service/mod.rs
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@@ -10,8 +10,6 @@
//!
//! - `HttpService`: This is blanketly implemented for all types that
//! implement `Service<http::Request<B1>, Response = http::Response<B2>>`.
//! - `MakeConnection`: A `Service` that returns a "connection", a type that
//! implements `AsyncRead` and `AsyncWrite`.
//!
//! # HttpService
//!
@@ -26,7 +24,6 @@
pub use tower_service::Service;
mod http;
mod make;
#[cfg(all(any(feature = "http1", feature = "http2"), feature = "client"))]
mod oneshot;
mod util;
@@ -34,8 +31,6 @@ mod util;
#[cfg(all(any(feature = "http1", feature = "http2"), feature = "server"))]
pub(super) use self::http::HttpService;
#[cfg(all(any(feature = "http1", feature = "http2"), feature = "client"))]
pub(super) use self::make::MakeConnection;
#[cfg(all(any(feature = "http1", feature = "http2"), feature = "client"))]
pub(super) use self::oneshot::{oneshot, Oneshot};
pub use self::util::service_fn;