use deno_core::error::resource_unavailable;
use deno_core::error::AnyError;
use deno_core::op;
use deno_core::AsyncMutFuture;
use deno_core::AsyncRefCell;
use deno_core::AsyncResult;
use deno_core::CancelHandle;
use deno_core::CancelTryFuture;
use deno_core::Extension;
use deno_core::OpState;
use deno_core::RcRef;
use deno_core::Resource;
use deno_core::ResourceId;
use deno_core::ZeroCopyBuf;
use once_cell::sync::Lazy;
use std::borrow::Cow;
use std::cell::RefCell;
use std::fs::File as StdFile;
use std::io::ErrorKind;
use std::io::Read;
use std::io::Write;
use std::rc::Rc;
use tokio::io::AsyncRead;
use tokio::io::AsyncReadExt;
use tokio::io::AsyncWrite;
use tokio::io::AsyncWriteExt;
use tokio::process;
#[cfg(unix)]
use std::os::unix::io::FromRawFd;
#[cfg(windows)]
use {
std::os::windows::io::FromRawHandle,
winapi::um::{processenv::GetStdHandle, winbase},
};
#[cfg(unix)]
static STDIN_HANDLE: Lazy<StdFile> = Lazy::new(|| {
unsafe { StdFile::from_raw_fd(0) }
});
#[cfg(unix)]
static STDOUT_HANDLE: Lazy<StdFile> = Lazy::new(|| {
unsafe { StdFile::from_raw_fd(1) }
});
#[cfg(unix)]
static STDERR_HANDLE: Lazy<StdFile> = Lazy::new(|| {
unsafe { StdFile::from_raw_fd(2) }
});
#[cfg(windows)]
static STDIN_HANDLE: Lazy<StdFile> = Lazy::new(|| {
unsafe { StdFile::from_raw_handle(GetStdHandle(winbase::STD_INPUT_HANDLE)) }
});
#[cfg(windows)]
static STDOUT_HANDLE: Lazy<StdFile> = Lazy::new(|| {
unsafe { StdFile::from_raw_handle(GetStdHandle(winbase::STD_OUTPUT_HANDLE)) }
});
#[cfg(windows)]
static STDERR_HANDLE: Lazy<StdFile> = Lazy::new(|| {
unsafe { StdFile::from_raw_handle(GetStdHandle(winbase::STD_ERROR_HANDLE)) }
});
pub fn init() -> Extension {
Extension::builder()
.ops(vec![op_read_sync::decl(), op_write_sync::decl()])
.build()
}
pub enum StdioPipe {
Inherit,
File(StdFile),
}
impl Default for StdioPipe {
fn default() -> Self {
Self::Inherit
}
}
impl Clone for StdioPipe {
fn clone(&self) -> Self {
match self {
StdioPipe::Inherit => StdioPipe::Inherit,
StdioPipe::File(pipe) => StdioPipe::File(pipe.try_clone().unwrap()),
}
}
}
#[derive(Clone, Default)]
pub struct Stdio {
pub stdin: StdioPipe,
pub stdout: StdioPipe,
pub stderr: StdioPipe,
}
pub fn init_stdio(stdio: Stdio) -> Extension {
let stdio = Rc::new(RefCell::new(Some(stdio)));
Extension::builder()
.middleware(|op| match op.name {
"op_print" => op_print::decl(),
_ => op,
})
.state(move |state| {
let stdio = stdio
.borrow_mut()
.take()
.expect("Extension only supports being used once.");
let t = &mut state.resource_table;
t.add(StdFileResource::stdio(
match stdio.stdin {
StdioPipe::Inherit => {
StdFileResourceInner::Stdin(STDIN_HANDLE.try_clone().unwrap())
}
StdioPipe::File(pipe) => StdFileResourceInner::file(pipe),
},
"stdin",
));
t.add(StdFileResource::stdio(
match stdio.stdout {
StdioPipe::Inherit => {
StdFileResourceInner::Stdout(STDOUT_HANDLE.try_clone().unwrap())
}
StdioPipe::File(pipe) => StdFileResourceInner::file(pipe),
},
"stdout",
));
t.add(StdFileResource::stdio(
match stdio.stderr {
StdioPipe::Inherit => {
StdFileResourceInner::Stderr(STDERR_HANDLE.try_clone().unwrap())
}
StdioPipe::File(pipe) => StdFileResourceInner::file(pipe),
},
"stderr",
));
Ok(())
})
.build()
}
#[cfg(unix)]
use nix::sys::termios;
#[derive(Default)]
pub struct TtyMetadata {
#[cfg(unix)]
pub mode: Option<termios::Termios>,
}
#[derive(Default)]
pub struct FileMetadata {
pub tty: TtyMetadata,
}
#[derive(Debug)]
pub struct WriteOnlyResource<S> {
stream: AsyncRefCell<S>,
}
impl<S: 'static> From<S> for WriteOnlyResource<S> {
fn from(stream: S) -> Self {
Self {
stream: stream.into(),
}
}
}
impl<S> WriteOnlyResource<S>
where
S: AsyncWrite + Unpin + 'static,
{
pub fn borrow_mut(self: &Rc<Self>) -> AsyncMutFuture<S> {
RcRef::map(self, |r| &r.stream).borrow_mut()
}
async fn write(self: Rc<Self>, buf: ZeroCopyBuf) -> Result<usize, AnyError> {
let mut stream = self.borrow_mut().await;
let nwritten = stream.write(&buf).await?;
Ok(nwritten)
}
async fn shutdown(self: Rc<Self>) -> Result<(), AnyError> {
let mut stream = self.borrow_mut().await;
stream.shutdown().await?;
Ok(())
}
pub fn into_inner(self) -> S {
self.stream.into_inner()
}
}
#[derive(Debug)]
pub struct ReadOnlyResource<S> {
stream: AsyncRefCell<S>,
cancel_handle: CancelHandle,
}
impl<S: 'static> From<S> for ReadOnlyResource<S> {
fn from(stream: S) -> Self {
Self {
stream: stream.into(),
cancel_handle: Default::default(),
}
}
}
impl<S> ReadOnlyResource<S>
where
S: AsyncRead + Unpin + 'static,
{
pub fn borrow_mut(self: &Rc<Self>) -> AsyncMutFuture<S> {
RcRef::map(self, |r| &r.stream).borrow_mut()
}
pub fn cancel_handle(self: &Rc<Self>) -> RcRef<CancelHandle> {
RcRef::map(self, |r| &r.cancel_handle)
}
pub fn cancel_read_ops(&self) {
self.cancel_handle.cancel()
}
async fn read(self: Rc<Self>, mut buf: ZeroCopyBuf) -> Result<(usize, ZeroCopyBuf), AnyError> {
let mut rd = self.borrow_mut().await;
let nread = rd
.read(&mut buf)
.try_or_cancel(self.cancel_handle())
.await?;
Ok((nread, buf))
}
pub fn into_inner(self) -> S {
self.stream.into_inner()
}
}
pub type ChildStdinResource = WriteOnlyResource<process::ChildStdin>;
impl Resource for ChildStdinResource {
fn name(&self) -> Cow<str> {
"childStdin".into()
}
fn write(self: Rc<Self>, buf: ZeroCopyBuf) -> AsyncResult<usize> {
Box::pin(self.write(buf))
}
fn shutdown(self: Rc<Self>) -> AsyncResult<()> {
Box::pin(self.shutdown())
}
}
pub type ChildStdoutResource = ReadOnlyResource<process::ChildStdout>;
impl Resource for ChildStdoutResource {
fn name(&self) -> Cow<str> {
"childStdout".into()
}
fn read_return(self: Rc<Self>, buf: ZeroCopyBuf) -> AsyncResult<(usize, ZeroCopyBuf)> {
Box::pin(self.read(buf))
}
fn close(self: Rc<Self>) {
self.cancel_read_ops();
}
}
pub type ChildStderrResource = ReadOnlyResource<process::ChildStderr>;
impl Resource for ChildStderrResource {
fn name(&self) -> Cow<str> {
"childStderr".into()
}
fn read_return(self: Rc<Self>, buf: ZeroCopyBuf) -> AsyncResult<(usize, ZeroCopyBuf)> {
Box::pin(self.read(buf))
}
fn close(self: Rc<Self>) {
self.cancel_read_ops();
}
}
enum StdFileResourceInner {
File(StdFile),
Stdin(StdFile),
Stdout(StdFile),
Stderr(StdFile),
}
impl StdFileResourceInner {
pub fn file(fs_file: StdFile) -> Self {
StdFileResourceInner::File(fs_file)
}
pub fn with_file<R>(&mut self, f: impl FnOnce(&mut StdFile) -> R) -> R {
match self {
Self::File(file) | Self::Stdin(file) | Self::Stdout(file) | Self::Stderr(file) => {
f(file)
}
}
}
pub fn write_and_maybe_flush(&mut self, buf: &[u8]) -> Result<usize, AnyError> {
match self {
Self::File(file) => Ok(file.write(buf)?),
Self::Stdin(_) => Err(Into::<std::io::Error>::into(ErrorKind::Unsupported).into()),
Self::Stdout(_) => {
let mut stdout = std::io::stdout().lock();
let nwritten = stdout.write(buf)?;
stdout.flush()?;
Ok(nwritten)
}
Self::Stderr(_) => {
let mut stderr = std::io::stderr().lock();
let nwritten = stderr.write(buf)?;
stderr.flush()?;
Ok(nwritten)
}
}
}
pub fn write_all_and_maybe_flush(&mut self, buf: &[u8]) -> Result<(), AnyError> {
match self {
Self::File(file) => Ok(file.write_all(buf)?),
Self::Stdin(_) => Err(Into::<std::io::Error>::into(ErrorKind::Unsupported).into()),
Self::Stdout(_) => {
let mut stdout = std::io::stdout().lock();
stdout.write_all(buf)?;
stdout.flush()?;
Ok(())
}
Self::Stderr(_) => {
let mut stderr = std::io::stderr().lock();
stderr.write_all(buf)?;
stderr.flush()?;
Ok(())
}
}
}
}
impl Read for StdFileResourceInner {
fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
match self {
Self::File(file) | Self::Stdin(file) => file.read(buf),
Self::Stdout(_) | Self::Stderr(_) => Err(ErrorKind::Unsupported.into()),
}
}
}
pub struct StdFileResource {
name: String,
cell: AsyncRefCell<Option<(StdFileResourceInner, FileMetadata)>>,
}
impl StdFileResource {
fn stdio(inner: StdFileResourceInner, name: &str) -> Self {
Self {
cell: AsyncRefCell::new(Some((inner, Default::default()))),
name: name.to_string(),
}
}
pub fn fs_file(fs_file: StdFile) -> Self {
Self {
cell: AsyncRefCell::new(Some((
StdFileResourceInner::file(fs_file),
Default::default(),
))),
name: "fsFile".to_string(),
}
}
fn with_inner_and_metadata<TResult>(
self: Rc<Self>,
action: impl FnOnce(&mut StdFileResourceInner, &mut FileMetadata) -> Result<TResult, AnyError>,
) -> Result<TResult, AnyError> {
match RcRef::map(&self, |r| &r.cell).try_borrow_mut() {
Some(mut cell) => {
let mut file = cell.take().unwrap();
let result = action(&mut file.0, &mut file.1);
cell.replace(file);
result
}
None => Err(resource_unavailable()),
}
}
async fn with_inner_blocking_task<F, R: Send + 'static>(self: Rc<Self>, action: F) -> R
where
F: FnOnce(&mut StdFileResourceInner) -> R + Send + 'static,
{
let mut cell = RcRef::map(&self, |r| &r.cell).borrow_mut().await;
let mut file = cell.take().unwrap();
let (file, result) = tokio::task::spawn_blocking(move || {
let result = action(&mut file.0);
(file, result)
})
.await
.unwrap();
cell.replace(file);
result
}
async fn read(self: Rc<Self>, mut buf: ZeroCopyBuf) -> Result<(usize, ZeroCopyBuf), AnyError> {
self.with_inner_blocking_task(move |inner| -> Result<(usize, ZeroCopyBuf), AnyError> {
Ok((inner.read(&mut buf)?, buf))
})
.await
}
async fn write(self: Rc<Self>, buf: ZeroCopyBuf) -> Result<usize, AnyError> {
self.with_inner_blocking_task(move |inner| inner.write_and_maybe_flush(&buf))
.await
}
fn with_resource<F, R>(state: &mut OpState, rid: ResourceId, f: F) -> Result<R, AnyError>
where
F: FnOnce(Rc<StdFileResource>) -> Result<R, AnyError>,
{
let resource = state.resource_table.get::<StdFileResource>(rid)?;
f(resource)
}
pub fn with_file<F, R>(state: &mut OpState, rid: ResourceId, f: F) -> Result<R, AnyError>
where
F: FnOnce(&mut StdFile) -> Result<R, AnyError>,
{
Self::with_resource(state, rid, move |resource| {
resource.with_inner_and_metadata(move |inner, _| inner.with_file(f))
})
}
pub fn with_file_and_metadata<F, R>(
state: &mut OpState,
rid: ResourceId,
f: F,
) -> Result<R, AnyError>
where
F: FnOnce(&mut StdFile, &mut FileMetadata) -> Result<R, AnyError>,
{
Self::with_resource(state, rid, move |resource| {
resource.with_inner_and_metadata(move |inner, metadata| {
inner.with_file(move |file| f(file, metadata))
})
})
}
pub async fn with_file_blocking_task<F, R: Send + 'static>(
state: Rc<RefCell<OpState>>,
rid: ResourceId,
f: F,
) -> Result<R, AnyError>
where
F: (FnOnce(&mut StdFile) -> Result<R, AnyError>) + Send + 'static,
{
let resource = state
.borrow_mut()
.resource_table
.get::<StdFileResource>(rid)?;
resource
.with_inner_blocking_task(move |inner| inner.with_file(f))
.await
}
pub fn clone_file(state: &mut OpState, rid: ResourceId) -> Result<StdFile, AnyError> {
Self::with_file(state, rid, move |std_file| {
std_file.try_clone().map_err(AnyError::from)
})
}
pub fn as_stdio(state: &mut OpState, rid: u32) -> Result<std::process::Stdio, AnyError> {
Self::with_resource(state, rid, |resource| {
resource.with_inner_and_metadata(|inner, _| match inner {
StdFileResourceInner::File(file) => {
let file = file.try_clone()?;
Ok(file.into())
}
_ => Ok(std::process::Stdio::inherit()),
})
})
}
}
impl Resource for StdFileResource {
fn name(&self) -> Cow<str> {
self.name.as_str().into()
}
fn read_return(self: Rc<Self>, buf: ZeroCopyBuf) -> AsyncResult<(usize, ZeroCopyBuf)> {
Box::pin(self.read(buf))
}
fn write(self: Rc<Self>, buf: ZeroCopyBuf) -> AsyncResult<usize> {
Box::pin(self.write(buf))
}
}
#[op]
pub fn op_print(state: &mut OpState, msg: String, is_err: bool) -> Result<(), AnyError> {
let rid = if is_err { 2 } else { 1 };
StdFileResource::with_resource(state, rid, move |resource| {
resource.with_inner_and_metadata(|inner, _| {
inner.write_all_and_maybe_flush(msg.as_bytes())?;
Ok(())
})
})
}
#[op]
fn op_read_sync(
state: &mut OpState,
rid: ResourceId,
mut buf: ZeroCopyBuf,
) -> Result<u32, AnyError> {
StdFileResource::with_resource(state, rid, move |resource| {
resource.with_inner_and_metadata(|inner, _| {
inner
.read(&mut buf)
.map(|n: usize| n as u32)
.map_err(AnyError::from)
})
})
}
#[op]
fn op_write_sync(state: &mut OpState, rid: ResourceId, buf: ZeroCopyBuf) -> Result<u32, AnyError> {
StdFileResource::with_resource(state, rid, move |resource| {
resource.with_inner_and_metadata(|inner, _| {
inner
.write_and_maybe_flush(&buf)
.map(|nwritten: usize| nwritten as u32)
.map_err(AnyError::from)
})
})
}