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use std::error::Error as StdError;
use std::fmt;
use std::marker::PhantomData;
use std::sync::Arc;
use std::time::Duration;
use http::{Request, Response};
use tokio::io::{AsyncRead, AsyncWrite};
use super::super::dispatch;
use crate::body::{Body, Incoming as IncomingBody};
use crate::common::time::Time;
use crate::common::{
exec::{BoxSendFuture, Exec},
task, Future, Pin, Poll,
};
use crate::proto;
use crate::rt::{Executor, Timer};
pub struct SendRequest<B> {
dispatch: dispatch::UnboundedSender<Request<B>, Response<IncomingBody>>,
}
#[must_use = "futures do nothing unless polled"]
pub struct Connection<T, B>
where
T: AsyncRead + AsyncWrite + Send + 'static,
B: Body + 'static,
{
inner: (PhantomData<T>, proto::h2::ClientTask<B>),
}
#[derive(Clone, Debug)]
pub struct Builder {
pub(super) exec: Exec,
pub(super) timer: Time,
h2_builder: proto::h2::client::Config,
}
pub async fn handshake<T, B>(
io: T,
) -> crate::Result<(SendRequest<B>, Connection<T, B>)>
where
T: AsyncRead + AsyncWrite + Unpin + Send + 'static,
B: Body + 'static,
B::Data: Send,
B::Error: Into<Box<dyn StdError + Send + Sync>>,
{
Builder::new().handshake(io).await
}
impl<B> SendRequest<B> {
pub fn poll_ready(&mut self, _cx: &mut task::Context<'_>) -> Poll<crate::Result<()>> {
if self.is_closed() {
Poll::Ready(Err(crate::Error::new_closed()))
} else {
Poll::Ready(Ok(()))
}
}
pub async fn ready(&mut self) -> crate::Result<()> {
futures_util::future::poll_fn(|cx| self.poll_ready(cx)).await
}
pub(super) fn is_closed(&self) -> bool {
self.dispatch.is_closed()
}
}
impl<B> SendRequest<B>
where
B: Body + 'static,
{
pub fn send_request(
&mut self,
req: Request<B>,
) -> impl Future<Output = crate::Result<Response<IncomingBody>>> {
let sent = self.dispatch.send(req);
async move {
match sent {
Ok(rx) => match rx.await {
Ok(Ok(resp)) => Ok(resp),
Ok(Err(err)) => Err(err),
Err(_canceled) => panic!("dispatch dropped without returning error"),
},
Err(_req) => {
tracing::debug!("connection was not ready");
Err(crate::Error::new_canceled().with("connection was not ready"))
}
}
}
}
}
impl<B> fmt::Debug for SendRequest<B> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("SendRequest").finish()
}
}
impl<T, B> Connection<T, B>
where
T: AsyncRead + AsyncWrite + Unpin + Send + 'static,
B: Body + Unpin + Send + 'static,
B::Data: Send,
B::Error: Into<Box<dyn StdError + Send + Sync>>,
{
pub fn is_extended_connect_protocol_enabled(&self) -> bool {
self.inner.1.is_extended_connect_protocol_enabled()
}
}
impl<T, B> fmt::Debug for Connection<T, B>
where
T: AsyncRead + AsyncWrite + fmt::Debug + Send + 'static,
B: Body + 'static,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("Connection").finish()
}
}
impl<T, B> Future for Connection<T, B>
where
T: AsyncRead + AsyncWrite + Unpin + Send + 'static,
B: Body + Send + 'static,
B::Data: Send,
B::Error: Into<Box<dyn StdError + Send + Sync>>,
{
type Output = crate::Result<()>;
fn poll(mut self: Pin<&mut Self>, cx: &mut task::Context<'_>) -> Poll<Self::Output> {
match ready!(Pin::new(&mut self.inner.1).poll(cx))? {
proto::Dispatched::Shutdown => Poll::Ready(Ok(())),
#[cfg(feature = "http1")]
proto::Dispatched::Upgrade(_pending) => unreachable!("http2 cannot upgrade"),
}
}
}
impl Builder {
#[inline]
pub fn new() -> Builder {
Builder {
exec: Exec::Default,
timer: Time::Empty,
h2_builder: Default::default(),
}
}
pub fn executor<E>(&mut self, exec: E) -> &mut Builder
where
E: Executor<BoxSendFuture> + Send + Sync + 'static,
{
self.exec = Exec::Executor(Arc::new(exec));
self
}
pub fn timer<M>(&mut self, timer: M) -> &mut Builder
where
M: Timer + Send + Sync + 'static,
{
self.timer = Time::Timer(Arc::new(timer));
self
}
#[cfg(feature = "http2")]
#[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
pub fn http2_initial_stream_window_size(&mut self, sz: impl Into<Option<u32>>) -> &mut Self {
if let Some(sz) = sz.into() {
self.h2_builder.adaptive_window = false;
self.h2_builder.initial_stream_window_size = sz;
}
self
}
#[cfg(feature = "http2")]
#[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
pub fn http2_initial_connection_window_size(
&mut self,
sz: impl Into<Option<u32>>,
) -> &mut Self {
if let Some(sz) = sz.into() {
self.h2_builder.adaptive_window = false;
self.h2_builder.initial_conn_window_size = sz;
}
self
}
#[cfg(feature = "http2")]
#[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
pub fn http2_adaptive_window(&mut self, enabled: bool) -> &mut Self {
use proto::h2::SPEC_WINDOW_SIZE;
self.h2_builder.adaptive_window = enabled;
if enabled {
self.h2_builder.initial_conn_window_size = SPEC_WINDOW_SIZE;
self.h2_builder.initial_stream_window_size = SPEC_WINDOW_SIZE;
}
self
}
#[cfg(feature = "http2")]
#[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
pub fn http2_max_frame_size(&mut self, sz: impl Into<Option<u32>>) -> &mut Self {
if let Some(sz) = sz.into() {
self.h2_builder.max_frame_size = sz;
}
self
}
#[cfg(feature = "http2")]
#[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
pub fn http2_keep_alive_interval(
&mut self,
interval: impl Into<Option<Duration>>,
) -> &mut Self {
self.h2_builder.keep_alive_interval = interval.into();
self
}
#[cfg(feature = "http2")]
#[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
pub fn http2_keep_alive_timeout(&mut self, timeout: Duration) -> &mut Self {
self.h2_builder.keep_alive_timeout = timeout;
self
}
#[cfg(feature = "http2")]
#[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
pub fn http2_keep_alive_while_idle(&mut self, enabled: bool) -> &mut Self {
self.h2_builder.keep_alive_while_idle = enabled;
self
}
#[cfg(feature = "http2")]
#[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
pub fn http2_max_concurrent_reset_streams(&mut self, max: usize) -> &mut Self {
self.h2_builder.max_concurrent_reset_streams = Some(max);
self
}
#[cfg(feature = "http2")]
#[cfg_attr(docsrs, doc(cfg(feature = "http2")))]
pub fn http2_max_send_buf_size(&mut self, max: usize) -> &mut Self {
assert!(max <= std::u32::MAX as usize);
self.h2_builder.max_send_buffer_size = max;
self
}
pub fn handshake<T, B>(
&self,
io: T,
) -> impl Future<Output = crate::Result<(SendRequest<B>, Connection<T, B>)>>
where
T: AsyncRead + AsyncWrite + Unpin + Send + 'static,
B: Body + 'static,
B::Data: Send,
B::Error: Into<Box<dyn StdError + Send + Sync>>,
{
let opts = self.clone();
async move {
tracing::trace!("client handshake HTTP/1");
let (tx, rx) = dispatch::channel();
let h2 = proto::h2::client::handshake(io, rx, &opts.h2_builder, opts.exec, opts.timer)
.await?;
Ok((
SendRequest {
dispatch: tx.unbound(),
},
Connection {
inner: (PhantomData, h2),
},
))
}
}
}