use std::io::Write;
use std::pin::Pin;
use std::task::{Context, Poll};
use std::{io, mem, time};
use actori_codec::{AsyncRead, AsyncWrite, Framed};
use bytes::buf::BufMutExt;
use bytes::{Bytes, BytesMut};
use futures_core::Stream;
use futures_util::future::poll_fn;
use futures_util::{SinkExt, StreamExt};
use crate::error::PayloadError;
use crate::h1;
use crate::header::HeaderMap;
use crate::http::header::{IntoHeaderValue, HOST};
use crate::message::{RequestHeadType, ResponseHead};
use crate::payload::{Payload, PayloadStream};
use super::connection::{ConnectionLifetime, ConnectionType, IoConnection};
use super::error::{ConnectError, SendRequestError};
use super::pool::Acquired;
use crate::body::{BodySize, MessageBody};
pub(crate) async fn send_request<T, B>(
io: T,
mut head: RequestHeadType,
body: B,
created: time::Instant,
pool: Option<Acquired<T>>,
) -> Result<(ResponseHead, Payload), SendRequestError>
where
T: AsyncRead + AsyncWrite + Unpin + 'static,
B: MessageBody,
{
if !head.as_ref().headers.contains_key(HOST)
&& !head.extra_headers().iter().any(|h| h.contains_key(HOST))
{
if let Some(host) = head.as_ref().uri.host() {
let mut wrt = BytesMut::with_capacity(host.len() + 5).writer();
let _ = match head.as_ref().uri.port_u16() {
None | Some(80) | Some(443) => write!(wrt, "{}", host),
Some(port) => write!(wrt, "{}:{}", host, port),
};
match wrt.get_mut().split().freeze().try_into() {
Ok(value) => match head {
RequestHeadType::Owned(ref mut head) => {
head.headers.insert(HOST, value)
}
RequestHeadType::Rc(_, ref mut extra_headers) => {
let headers = extra_headers.get_or_insert(HeaderMap::new());
headers.insert(HOST, value)
}
},
Err(e) => log::error!("Can not set HOST header {}", e),
}
}
}
let io = H1Connection {
created,
pool,
io: Some(io),
};
let mut framed = Framed::new(io, h1::ClientCodec::default());
framed.send((head, body.size()).into()).await?;
match body.size() {
BodySize::None | BodySize::Empty | BodySize::Sized(0) => (),
_ => send_body(body, &mut framed).await?,
};
let res = framed.into_future().await;
let (head, framed) = if let (Some(result), framed) = res {
let item = result.map_err(SendRequestError::from)?;
(item, framed)
} else {
return Err(SendRequestError::from(ConnectError::Disconnected));
};
match framed.get_codec().message_type() {
h1::MessageType::None => {
let force_close = !framed.get_codec().keepalive();
release_connection(framed, force_close);
Ok((head, Payload::None))
}
_ => {
let pl: PayloadStream = PlStream::new(framed).boxed_local();
Ok((head, pl.into()))
}
}
}
pub(crate) async fn open_tunnel<T>(
io: T,
head: RequestHeadType,
) -> Result<(ResponseHead, Framed<T, h1::ClientCodec>), SendRequestError>
where
T: AsyncRead + AsyncWrite + Unpin + 'static,
{
let mut framed = Framed::new(io, h1::ClientCodec::default());
framed.send((head, BodySize::None).into()).await?;
if let (Some(result), framed) = framed.into_future().await {
let head = result.map_err(SendRequestError::from)?;
Ok((head, framed))
} else {
Err(SendRequestError::from(ConnectError::Disconnected))
}
}
pub(crate) async fn send_body<I, B>(
mut body: B,
framed: &mut Framed<I, h1::ClientCodec>,
) -> Result<(), SendRequestError>
where
I: ConnectionLifetime,
B: MessageBody,
{
let mut eof = false;
while !eof {
while !eof && !framed.is_write_buf_full() {
match poll_fn(|cx| body.poll_next(cx)).await {
Some(result) => {
framed.write(h1::Message::Chunk(Some(result?)))?;
}
None => {
eof = true;
framed.write(h1::Message::Chunk(None))?;
}
}
}
if !framed.is_write_buf_empty() {
poll_fn(|cx| match framed.flush(cx) {
Poll::Ready(Ok(_)) => Poll::Ready(Ok(())),
Poll::Ready(Err(err)) => Poll::Ready(Err(err)),
Poll::Pending => {
if !framed.is_write_buf_full() {
Poll::Ready(Ok(()))
} else {
Poll::Pending
}
}
})
.await?;
}
}
SinkExt::flush(framed).await?;
Ok(())
}
#[doc(hidden)]
pub struct H1Connection<T> {
io: Option<T>,
created: time::Instant,
pool: Option<Acquired<T>>,
}
impl<T> ConnectionLifetime for H1Connection<T>
where
T: AsyncRead + AsyncWrite + Unpin + 'static,
{
fn close(&mut self) {
if let Some(mut pool) = self.pool.take() {
if let Some(io) = self.io.take() {
pool.close(IoConnection::new(
ConnectionType::H1(io),
self.created,
None,
));
}
}
}
fn release(&mut self) {
if let Some(mut pool) = self.pool.take() {
if let Some(io) = self.io.take() {
pool.release(IoConnection::new(
ConnectionType::H1(io),
self.created,
None,
));
}
}
}
}
impl<T: AsyncRead + AsyncWrite + Unpin + 'static> AsyncRead for H1Connection<T> {
unsafe fn prepare_uninitialized_buffer(
&self,
buf: &mut [mem::MaybeUninit<u8>],
) -> bool {
self.io.as_ref().unwrap().prepare_uninitialized_buffer(buf)
}
fn poll_read(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &mut [u8],
) -> Poll<io::Result<usize>> {
Pin::new(&mut self.io.as_mut().unwrap()).poll_read(cx, buf)
}
}
impl<T: AsyncRead + AsyncWrite + Unpin + 'static> AsyncWrite for H1Connection<T> {
fn poll_write(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8],
) -> Poll<io::Result<usize>> {
Pin::new(&mut self.io.as_mut().unwrap()).poll_write(cx, buf)
}
fn poll_flush(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
) -> Poll<io::Result<()>> {
Pin::new(self.io.as_mut().unwrap()).poll_flush(cx)
}
fn poll_shutdown(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
) -> Poll<Result<(), io::Error>> {
Pin::new(self.io.as_mut().unwrap()).poll_shutdown(cx)
}
}
pub(crate) struct PlStream<Io> {
framed: Option<Framed<Io, h1::ClientPayloadCodec>>,
}
impl<Io: ConnectionLifetime> PlStream<Io> {
fn new(framed: Framed<Io, h1::ClientCodec>) -> Self {
PlStream {
framed: Some(framed.map_codec(|codec| codec.into_payload_codec())),
}
}
}
impl<Io: ConnectionLifetime> Stream for PlStream<Io> {
type Item = Result<Bytes, PayloadError>;
fn poll_next(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
) -> Poll<Option<Self::Item>> {
let this = self.get_mut();
match this.framed.as_mut().unwrap().next_item(cx)? {
Poll::Pending => Poll::Pending,
Poll::Ready(Some(chunk)) => {
if let Some(chunk) = chunk {
Poll::Ready(Some(Ok(chunk)))
} else {
let framed = this.framed.take().unwrap();
let force_close = !framed.get_codec().keepalive();
release_connection(framed, force_close);
Poll::Ready(None)
}
}
Poll::Ready(None) => Poll::Ready(None),
}
}
}
fn release_connection<T, U>(framed: Framed<T, U>, force_close: bool)
where
T: ConnectionLifetime,
{
let mut parts = framed.into_parts();
if !force_close && parts.read_buf.is_empty() && parts.write_buf.is_empty() {
parts.io.release()
} else {
parts.io.close()
}
}