#![cfg(feature = "http3")]
pub(crate) mod connect;
pub(crate) mod dns;
mod pool;
use crate::async_impl::body::ResponseBody;
use crate::async_impl::h3_client::pool::{Key, Pool, PoolClient};
use crate::error::{BoxError, Error, Kind};
use crate::{error, Body};
use connect::H3Connector;
use futures_util::future;
use http::{Request, Response};
use log::trace;
use std::future::Future;
use std::pin::Pin;
use std::task::{Context, Poll};
use std::time::Duration;
#[derive(Clone)]
pub(crate) struct H3Client {
pool: Pool,
connector: H3Connector,
}
impl H3Client {
pub fn new(connector: H3Connector, pool_timeout: Option<Duration>) -> Self {
H3Client {
pool: Pool::new(pool_timeout),
connector,
}
}
async fn get_pooled_client(&mut self, key: Key) -> Result<PoolClient, BoxError> {
if let Some(client) = self.pool.try_pool(&key) {
trace!("getting client from pool with key {key:?}");
return Ok(client);
}
trace!("did not find connection {key:?} in pool so connecting...");
let dest = pool::domain_as_uri(key.clone());
self.pool.connecting(key.clone())?;
let (driver, tx) = self.connector.connect(dest).await?;
Ok(self.pool.new_connection(key, driver, tx))
}
async fn send_request(
mut self,
key: Key,
req: Request<Body>,
) -> Result<Response<ResponseBody>, Error> {
let mut pooled = match self.get_pooled_client(key).await {
Ok(client) => client,
Err(e) => return Err(error::request(e)),
};
pooled
.send_request(req)
.await
.map_err(|e| Error::new(Kind::Request, Some(e)))
}
pub fn request(&self, mut req: Request<Body>) -> H3ResponseFuture {
let pool_key = match pool::extract_domain(req.uri_mut()) {
Ok(s) => s,
Err(e) => {
return H3ResponseFuture {
inner: Box::pin(future::err(e)),
}
}
};
H3ResponseFuture {
inner: Box::pin(self.clone().send_request(pool_key, req)),
}
}
}
pub(crate) struct H3ResponseFuture {
inner: Pin<Box<dyn Future<Output = Result<Response<ResponseBody>, Error>> + Send>>,
}
impl Future for H3ResponseFuture {
type Output = Result<Response<ResponseBody>, Error>;
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
self.inner.as_mut().poll(cx)
}
}