mirror of
https://github.com/denoland/deno
synced 2024-08-25 02:57:22 +00:00
180 lines
4.3 KiB
Rust
180 lines
4.3 KiB
Rust
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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use deno_core::error::generic_error;
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use deno_core::error::AnyError;
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use deno_core::AsyncMutFuture;
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use deno_core::AsyncRefCell;
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use deno_core::AsyncResult;
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use deno_core::CancelHandle;
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use deno_core::CancelTryFuture;
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use deno_core::RcRef;
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use deno_core::Resource;
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use socket2::SockRef;
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use std::borrow::Cow;
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use std::rc::Rc;
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use tokio::io::AsyncRead;
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use tokio::io::AsyncReadExt;
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use tokio::io::AsyncWrite;
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use tokio::io::AsyncWriteExt;
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use tokio::net::tcp;
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#[cfg(unix)]
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use tokio::net::unix;
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/// A full duplex resource has a read and write ends that are completely
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/// independent, like TCP/Unix sockets and TLS streams.
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#[derive(Debug)]
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pub struct FullDuplexResource<R, W> {
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rd: AsyncRefCell<R>,
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wr: AsyncRefCell<W>,
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// When a full-duplex resource is closed, all pending 'read' ops are
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// canceled, while 'write' ops are allowed to complete. Therefore only
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// 'read' futures should be attached to this cancel handle.
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cancel_handle: CancelHandle,
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}
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impl<R, W> FullDuplexResource<R, W>
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where
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R: AsyncRead + Unpin + 'static,
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W: AsyncWrite + Unpin + 'static,
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{
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pub fn new((rd, wr): (R, W)) -> Self {
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Self {
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rd: rd.into(),
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wr: wr.into(),
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cancel_handle: Default::default(),
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}
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}
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pub fn into_inner(self) -> (R, W) {
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(self.rd.into_inner(), self.wr.into_inner())
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}
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pub fn rd_borrow_mut(self: &Rc<Self>) -> AsyncMutFuture<R> {
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RcRef::map(self, |r| &r.rd).borrow_mut()
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}
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pub fn wr_borrow_mut(self: &Rc<Self>) -> AsyncMutFuture<W> {
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RcRef::map(self, |r| &r.wr).borrow_mut()
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}
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pub fn cancel_handle(self: &Rc<Self>) -> RcRef<CancelHandle> {
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RcRef::map(self, |r| &r.cancel_handle)
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}
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pub fn cancel_read_ops(&self) {
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self.cancel_handle.cancel()
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}
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pub async fn read(
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self: Rc<Self>,
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data: &mut [u8],
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) -> Result<usize, AnyError> {
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let mut rd = self.rd_borrow_mut().await;
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let nread = rd.read(data).try_or_cancel(self.cancel_handle()).await?;
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Ok(nread)
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}
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pub async fn write(self: Rc<Self>, data: &[u8]) -> Result<usize, AnyError> {
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let mut wr = self.wr_borrow_mut().await;
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let nwritten = wr.write(data).await?;
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Ok(nwritten)
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}
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pub async fn shutdown(self: Rc<Self>) -> Result<(), AnyError> {
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let mut wr = self.wr_borrow_mut().await;
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wr.shutdown().await?;
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Ok(())
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}
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}
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pub type TcpStreamResource =
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FullDuplexResource<tcp::OwnedReadHalf, tcp::OwnedWriteHalf>;
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impl Resource for TcpStreamResource {
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deno_core::impl_readable_byob!();
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deno_core::impl_writable!();
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fn name(&self) -> Cow<str> {
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"tcpStream".into()
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}
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fn shutdown(self: Rc<Self>) -> AsyncResult<()> {
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Box::pin(self.shutdown())
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}
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fn close(self: Rc<Self>) {
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self.cancel_read_ops();
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}
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}
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impl TcpStreamResource {
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pub fn set_nodelay(self: Rc<Self>, nodelay: bool) -> Result<(), AnyError> {
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self.map_socket(Box::new(move |socket| Ok(socket.set_nodelay(nodelay)?)))
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}
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pub fn set_keepalive(
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self: Rc<Self>,
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keepalive: bool,
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) -> Result<(), AnyError> {
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self
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.map_socket(Box::new(move |socket| Ok(socket.set_keepalive(keepalive)?)))
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}
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#[allow(clippy::type_complexity)]
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fn map_socket(
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self: Rc<Self>,
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map: Box<dyn FnOnce(SockRef) -> Result<(), AnyError>>,
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) -> Result<(), AnyError> {
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if let Some(wr) = RcRef::map(self, |r| &r.wr).try_borrow() {
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let stream = wr.as_ref().as_ref();
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let socket = socket2::SockRef::from(stream);
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return map(socket);
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}
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Err(generic_error("Unable to get resources"))
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}
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}
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#[cfg(unix)]
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pub type UnixStreamResource =
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FullDuplexResource<unix::OwnedReadHalf, unix::OwnedWriteHalf>;
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#[cfg(not(unix))]
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pub struct UnixStreamResource;
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#[cfg(not(unix))]
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impl UnixStreamResource {
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fn read(self: Rc<Self>, _data: &mut [u8]) -> AsyncResult<usize> {
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unreachable!()
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}
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fn write(self: Rc<Self>, _data: &[u8]) -> AsyncResult<usize> {
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unreachable!()
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}
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#[allow(clippy::unused_async)]
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pub async fn shutdown(self: Rc<Self>) -> Result<(), AnyError> {
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unreachable!()
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}
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pub fn cancel_read_ops(&self) {
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unreachable!()
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}
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}
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impl Resource for UnixStreamResource {
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deno_core::impl_readable_byob!();
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deno_core::impl_writable!();
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fn name(&self) -> Cow<str> {
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"unixStream".into()
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}
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fn shutdown(self: Rc<Self>) -> AsyncResult<()> {
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Box::pin(self.shutdown())
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}
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fn close(self: Rc<Self>) {
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self.cancel_read_ops();
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}
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}
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