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|
//! 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)
}
}
|
