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2ca454b402
* refactor(ops): return BadResource errors in ResourceTable calls Instead of relying on callers to map Options to Results via `.ok_or_else(bad_resource_id)` at over 176 different call sites ...
220 lines
5.6 KiB
Rust
220 lines
5.6 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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use crate::ops_tls as tls;
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use deno_core::error::not_supported;
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use deno_core::error::null_opbuf;
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use deno_core::error::AnyError;
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use deno_core::op_async;
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use deno_core::AsyncMutFuture;
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use deno_core::AsyncRefCell;
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use deno_core::CancelHandle;
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use deno_core::CancelTryFuture;
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use deno_core::OpPair;
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use deno_core::OpState;
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use deno_core::RcRef;
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use deno_core::Resource;
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use deno_core::ResourceId;
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use deno_core::ZeroCopyBuf;
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use std::borrow::Cow;
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use std::cell::RefCell;
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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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pub fn init() -> Vec<OpPair> {
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vec![
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("op_net_read_async", op_async(op_read_async)),
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("op_net_write_async", op_async(op_write_async)),
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("op_net_shutdown", op_async(op_shutdown)),
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]
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}
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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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buf: &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(buf).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>, buf: &[u8]) -> Result<usize, AnyError> {
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let mut wr = self.wr_borrow_mut().await;
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let nwritten = wr.write(buf).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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fn name(&self) -> Cow<str> {
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"tcpStream".into()
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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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pub type TlsStreamResource = FullDuplexResource<tls::ReadHalf, tls::WriteHalf>;
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impl Resource for TlsStreamResource {
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fn name(&self) -> Cow<str> {
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"tlsStream".into()
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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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#[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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pub async fn read(
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self: &Rc<Self>,
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_buf: &mut [u8],
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) -> Result<usize, AnyError> {
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unreachable!()
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}
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pub async fn write(self: &Rc<Self>, _buf: &[u8]) -> Result<usize, AnyError> {
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unreachable!()
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}
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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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fn name(&self) -> Cow<str> {
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"unixStream".into()
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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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async fn op_read_async(
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state: Rc<RefCell<OpState>>,
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rid: ResourceId,
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buf: Option<ZeroCopyBuf>,
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) -> Result<u32, AnyError> {
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let buf = &mut buf.ok_or_else(null_opbuf)?;
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let resource = state.borrow().resource_table.get_any(rid)?;
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let nread = if let Some(s) = resource.downcast_rc::<TcpStreamResource>() {
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s.read(buf).await?
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} else if let Some(s) = resource.downcast_rc::<TlsStreamResource>() {
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s.read(buf).await?
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} else if let Some(s) = resource.downcast_rc::<UnixStreamResource>() {
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s.read(buf).await?
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} else {
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return Err(not_supported());
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};
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Ok(nread as u32)
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}
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async fn op_write_async(
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state: Rc<RefCell<OpState>>,
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rid: ResourceId,
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buf: Option<ZeroCopyBuf>,
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) -> Result<u32, AnyError> {
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let buf = &buf.ok_or_else(null_opbuf)?;
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let resource = state.borrow().resource_table.get_any(rid)?;
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let nwritten = if let Some(s) = resource.downcast_rc::<TcpStreamResource>() {
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s.write(buf).await?
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} else if let Some(s) = resource.downcast_rc::<TlsStreamResource>() {
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s.write(buf).await?
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} else if let Some(s) = resource.downcast_rc::<UnixStreamResource>() {
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s.write(buf).await?
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} else {
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return Err(not_supported());
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};
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Ok(nwritten as u32)
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}
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async fn op_shutdown(
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state: Rc<RefCell<OpState>>,
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rid: ResourceId,
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_: (),
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) -> Result<(), AnyError> {
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let resource = state.borrow().resource_table.get_any(rid)?;
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if let Some(s) = resource.downcast_rc::<TcpStreamResource>() {
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s.shutdown().await?;
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} else if let Some(s) = resource.downcast_rc::<TlsStreamResource>() {
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s.shutdown().await?;
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} else if let Some(s) = resource.downcast_rc::<UnixStreamResource>() {
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s.shutdown().await?;
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} else {
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return Err(not_supported());
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}
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Ok(())
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}
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