mirror of
https://github.com/denoland/deno.git
synced 2024-10-29 08:58:01 -04:00
612 lines
18 KiB
Rust
612 lines
18 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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use super::dispatch_minimal::minimal_op;
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use super::dispatch_minimal::MinimalOp;
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use crate::metrics::metrics_op;
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use deno_core::error::bad_resource_id;
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use deno_core::error::resource_unavailable;
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use deno_core::error::type_error;
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use deno_core::error::AnyError;
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use deno_core::futures::future::FutureExt;
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use deno_core::AsyncMutFuture;
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use deno_core::AsyncRefCell;
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use deno_core::BufVec;
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use deno_core::CancelHandle;
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use deno_core::CancelTryFuture;
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use deno_core::JsRuntime;
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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 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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use tokio::net::TcpStream;
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use tokio_rustls::client::TlsStream as ClientTlsStream;
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use tokio_rustls::server::TlsStream as ServerTlsStream;
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#[cfg(unix)]
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use std::os::unix::io::FromRawFd;
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#[cfg(windows)]
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use std::os::windows::io::FromRawHandle;
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lazy_static! {
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/// Due to portability issues on Windows handle to stdout is created from raw
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/// file descriptor. The caveat of that approach is fact that when this
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/// handle is dropped underlying file descriptor is closed - that is highly
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/// not desirable in case of stdout. That's why we store this global handle
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/// that is then cloned when obtaining stdio for process. In turn when
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/// resource table is dropped storing reference to that handle, the handle
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/// itself won't be closed (so Deno.core.print) will still work.
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// TODO(ry) It should be possible to close stdout.
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static ref STDIN_HANDLE: Option<std::fs::File> = {
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#[cfg(not(windows))]
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let stdin = unsafe { Some(std::fs::File::from_raw_fd(0)) };
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#[cfg(windows)]
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let stdin = unsafe {
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let handle = winapi::um::processenv::GetStdHandle(
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winapi::um::winbase::STD_INPUT_HANDLE,
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);
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if handle.is_null() {
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return None;
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}
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Some(std::fs::File::from_raw_handle(handle))
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};
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stdin
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};
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static ref STDOUT_HANDLE: Option<std::fs::File> = {
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#[cfg(not(windows))]
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let stdout = unsafe { Some(std::fs::File::from_raw_fd(1)) };
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#[cfg(windows)]
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let stdout = unsafe {
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let handle = winapi::um::processenv::GetStdHandle(
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winapi::um::winbase::STD_OUTPUT_HANDLE,
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);
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if handle.is_null() {
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return None;
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}
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Some(std::fs::File::from_raw_handle(handle))
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};
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stdout
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};
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static ref STDERR_HANDLE: Option<std::fs::File> = {
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#[cfg(not(windows))]
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let stderr = unsafe { Some(std::fs::File::from_raw_fd(2)) };
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#[cfg(windows)]
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let stderr = unsafe {
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let handle = winapi::um::processenv::GetStdHandle(
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winapi::um::winbase::STD_ERROR_HANDLE,
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);
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if handle.is_null() {
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return None;
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}
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Some(std::fs::File::from_raw_handle(handle))
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};
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stderr
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};
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}
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pub fn init(rt: &mut JsRuntime) {
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rt.register_op("op_read", metrics_op(minimal_op(op_read)));
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rt.register_op("op_write", metrics_op(minimal_op(op_write)));
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}
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pub fn get_stdio() -> (
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Option<StreamResource>,
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Option<StreamResource>,
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Option<StreamResource>,
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) {
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let stdin = get_stdio_stream(&STDIN_HANDLE, "stdin");
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let stdout = get_stdio_stream(&STDOUT_HANDLE, "stdout");
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let stderr = get_stdio_stream(&STDERR_HANDLE, "stderr");
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(stdin, stdout, stderr)
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}
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fn get_stdio_stream(
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handle: &Option<std::fs::File>,
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name: &str,
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) -> Option<StreamResource> {
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match handle {
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None => None,
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Some(file_handle) => match file_handle.try_clone() {
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Ok(clone) => {
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let tokio_file = tokio::fs::File::from_std(clone);
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Some(StreamResource::stdio(tokio_file, name))
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}
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Err(_e) => None,
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},
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}
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}
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fn no_buffer_specified() -> AnyError {
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type_error("no buffer specified")
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}
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#[cfg(unix)]
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use nix::sys::termios;
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#[derive(Default)]
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pub struct TTYMetadata {
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#[cfg(unix)]
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pub mode: Option<termios::Termios>,
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}
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#[derive(Default)]
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pub struct FileMetadata {
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pub tty: TTYMetadata,
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}
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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: 'static, W: 'static> FullDuplexResource<R, W> {
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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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}
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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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async fn read(self: &Rc<Self>, buf: &mut [u8]) -> 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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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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}
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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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#[derive(Default)]
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pub struct StreamResource {
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pub fs_file:
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Option<AsyncRefCell<(Option<tokio::fs::File>, Option<FileMetadata>)>>,
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#[cfg(unix)]
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pub unix_stream: Option<AsyncRefCell<tokio::net::UnixStream>>,
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child_stdin: Option<AsyncRefCell<tokio::process::ChildStdin>>,
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child_stdout: Option<AsyncRefCell<tokio::process::ChildStdout>>,
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child_stderr: Option<AsyncRefCell<tokio::process::ChildStderr>>,
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client_tls_stream: Option<AsyncRefCell<ClientTlsStream<TcpStream>>>,
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server_tls_stream: Option<AsyncRefCell<ServerTlsStream<TcpStream>>>,
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cancel: CancelHandle,
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name: String,
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}
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impl std::fmt::Debug for StreamResource {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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write!(f, "StreamResource")
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}
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}
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impl StreamResource {
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pub fn stdio(fs_file: tokio::fs::File, name: &str) -> Self {
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Self {
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fs_file: Some(AsyncRefCell::new((
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Some(fs_file),
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Some(FileMetadata::default()),
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))),
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name: name.to_string(),
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..Default::default()
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}
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}
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pub fn fs_file(fs_file: tokio::fs::File) -> Self {
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Self {
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fs_file: Some(AsyncRefCell::new((
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Some(fs_file),
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Some(FileMetadata::default()),
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))),
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name: "fsFile".to_string(),
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..Default::default()
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}
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}
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#[cfg(unix)]
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pub fn unix_stream(unix_stream: tokio::net::UnixStream) -> Self {
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Self {
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unix_stream: Some(AsyncRefCell::new(unix_stream)),
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name: "unixStream".to_string(),
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..Default::default()
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}
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}
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pub fn child_stdout(child: tokio::process::ChildStdout) -> Self {
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Self {
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child_stdout: Some(AsyncRefCell::new(child)),
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name: "childStdout".to_string(),
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..Default::default()
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}
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}
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pub fn child_stderr(child: tokio::process::ChildStderr) -> Self {
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Self {
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child_stderr: Some(AsyncRefCell::new(child)),
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name: "childStderr".to_string(),
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..Default::default()
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}
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}
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pub fn child_stdin(child: tokio::process::ChildStdin) -> Self {
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Self {
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child_stdin: Some(AsyncRefCell::new(child)),
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name: "childStdin".to_string(),
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..Default::default()
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}
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}
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pub fn client_tls_stream(stream: ClientTlsStream<TcpStream>) -> Self {
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Self {
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client_tls_stream: Some(AsyncRefCell::new(stream)),
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name: "clientTlsStream".to_string(),
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..Default::default()
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}
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}
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pub fn server_tls_stream(stream: ServerTlsStream<TcpStream>) -> Self {
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Self {
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server_tls_stream: Some(AsyncRefCell::new(stream)),
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name: "serverTlsStream".to_string(),
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..Default::default()
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}
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}
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async fn read(self: Rc<Self>, buf: &mut [u8]) -> Result<usize, AnyError> {
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// TODO(bartlomieju): in the future, it would be better for `StreamResource`
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// to be an enum instead a struct with many `Option` fields, however I
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// wasn't able to get it to work with `AsyncRefCell`s.
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if self.fs_file.is_some() {
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debug_assert!(self.child_stdin.is_none());
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debug_assert!(self.child_stdout.is_none());
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debug_assert!(self.child_stderr.is_none());
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debug_assert!(self.server_tls_stream.is_none());
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debug_assert!(self.client_tls_stream.is_none());
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let mut fs_file = RcRef::map(&self, |r| r.fs_file.as_ref().unwrap())
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.borrow_mut()
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.await;
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let nwritten = (*fs_file).0.as_mut().unwrap().read(buf).await?;
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return Ok(nwritten);
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} else if self.child_stdout.is_some() {
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debug_assert!(self.child_stdin.is_none());
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debug_assert!(self.child_stderr.is_none());
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debug_assert!(self.server_tls_stream.is_none());
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debug_assert!(self.client_tls_stream.is_none());
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let mut child_stdout =
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RcRef::map(&self, |r| r.child_stdout.as_ref().unwrap())
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.borrow_mut()
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.await;
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let cancel = RcRef::map(self, |r| &r.cancel);
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let nread = child_stdout.read(buf).try_or_cancel(cancel).await?;
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return Ok(nread);
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} else if self.child_stderr.is_some() {
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debug_assert!(self.child_stdin.is_none());
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debug_assert!(self.server_tls_stream.is_none());
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debug_assert!(self.client_tls_stream.is_none());
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let mut child_stderr =
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RcRef::map(&self, |r| r.child_stderr.as_ref().unwrap())
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.borrow_mut()
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.await;
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let cancel = RcRef::map(self, |r| &r.cancel);
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let nread = child_stderr.read(buf).try_or_cancel(cancel).await?;
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return Ok(nread);
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} else if self.client_tls_stream.is_some() {
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debug_assert!(self.server_tls_stream.is_none());
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let mut client_tls_stream =
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RcRef::map(&self, |r| r.client_tls_stream.as_ref().unwrap())
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.borrow_mut()
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.await;
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let cancel = RcRef::map(self, |r| &r.cancel);
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let nread = client_tls_stream.read(buf).try_or_cancel(cancel).await?;
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return Ok(nread);
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} else if self.server_tls_stream.is_some() {
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let mut server_tls_stream =
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RcRef::map(&self, |r| r.server_tls_stream.as_ref().unwrap())
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.borrow_mut()
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.await;
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let cancel = RcRef::map(self, |r| &r.cancel);
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let nread = server_tls_stream.read(buf).try_or_cancel(cancel).await?;
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return Ok(nread);
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}
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#[cfg(unix)]
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if self.unix_stream.is_some() {
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let mut unix_stream =
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RcRef::map(&self, |r| r.unix_stream.as_ref().unwrap())
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.borrow_mut()
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.await;
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let cancel = RcRef::map(self, |r| &r.cancel);
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let nread = unix_stream.read(buf).try_or_cancel(cancel).await?;
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return Ok(nread);
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}
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Err(bad_resource_id())
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}
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async fn write(self: Rc<Self>, buf: &[u8]) -> Result<usize, AnyError> {
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// TODO(bartlomieju): in the future, it would be better for `StreamResource`
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// to be an enum instead a struct with many `Option` fields, however I
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// wasn't able to get it to work with `AsyncRefCell`s.
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if self.fs_file.is_some() {
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debug_assert!(self.child_stdin.is_none());
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debug_assert!(self.child_stdout.is_none());
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debug_assert!(self.child_stderr.is_none());
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debug_assert!(self.server_tls_stream.is_none());
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debug_assert!(self.client_tls_stream.is_none());
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let mut fs_file = RcRef::map(&self, |r| r.fs_file.as_ref().unwrap())
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.borrow_mut()
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.await;
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let nwritten = (*fs_file).0.as_mut().unwrap().write(buf).await?;
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(*fs_file).0.as_mut().unwrap().flush().await?;
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return Ok(nwritten);
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} else if self.child_stdin.is_some() {
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debug_assert!(self.child_stdout.is_none());
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debug_assert!(self.child_stderr.is_none());
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debug_assert!(self.server_tls_stream.is_none());
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debug_assert!(self.client_tls_stream.is_none());
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let mut child_stdin =
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RcRef::map(&self, |r| r.child_stdin.as_ref().unwrap())
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.borrow_mut()
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.await;
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let nwritten = child_stdin.write(buf).await?;
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child_stdin.flush().await?;
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return Ok(nwritten);
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} else if self.client_tls_stream.is_some() {
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debug_assert!(self.server_tls_stream.is_none());
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let mut client_tls_stream =
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RcRef::map(&self, |r| r.client_tls_stream.as_ref().unwrap())
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.borrow_mut()
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.await;
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let nwritten = client_tls_stream.write(buf).await?;
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client_tls_stream.flush().await?;
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return Ok(nwritten);
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} else if self.server_tls_stream.is_some() {
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let mut server_tls_stream =
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RcRef::map(&self, |r| r.server_tls_stream.as_ref().unwrap())
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.borrow_mut()
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.await;
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let nwritten = server_tls_stream.write(buf).await?;
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server_tls_stream.flush().await?;
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return Ok(nwritten);
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}
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#[cfg(unix)]
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if self.unix_stream.is_some() {
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let mut unix_stream =
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RcRef::map(&self, |r| r.unix_stream.as_ref().unwrap())
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.borrow_mut()
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.await;
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let nwritten = unix_stream.write(buf).await?;
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unix_stream.flush().await?;
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return Ok(nwritten);
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}
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Err(bad_resource_id())
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}
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}
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impl Resource for StreamResource {
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fn name(&self) -> Cow<str> {
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self.name.clone().into()
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}
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fn close(self: Rc<Self>) {
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self.cancel.cancel()
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}
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}
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pub fn op_read(
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state: Rc<RefCell<OpState>>,
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is_sync: bool,
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rid: i32,
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mut zero_copy: BufVec,
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) -> MinimalOp {
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debug!("read rid={}", rid);
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match zero_copy.len() {
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0 => return MinimalOp::Sync(Err(no_buffer_specified())),
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1 => {}
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_ => panic!("Invalid number of arguments"),
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}
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if is_sync {
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MinimalOp::Sync({
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// First we look up the rid in the resource table.
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std_file_resource(&mut state.borrow_mut(), rid as u32, move |r| match r {
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Ok(std_file) => {
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use std::io::Read;
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std_file
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.read(&mut zero_copy[0])
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|
.map(|n: usize| n as i32)
|
|
.map_err(AnyError::from)
|
|
}
|
|
Err(_) => Err(type_error("sync read not allowed on this resource")),
|
|
})
|
|
})
|
|
} else {
|
|
let mut zero_copy = zero_copy[0].clone();
|
|
MinimalOp::Async({
|
|
async move {
|
|
let resource = state
|
|
.borrow()
|
|
.resource_table
|
|
.get_any(rid as u32)
|
|
.ok_or_else(bad_resource_id)?;
|
|
let nread = if let Some(stream) =
|
|
resource.downcast_rc::<TcpStreamResource>()
|
|
{
|
|
stream.read(&mut zero_copy).await?
|
|
} else if let Some(stream) = resource.downcast_rc::<StreamResource>() {
|
|
stream.clone().read(&mut zero_copy).await?
|
|
} else {
|
|
return Err(bad_resource_id());
|
|
};
|
|
Ok(nread as i32)
|
|
}
|
|
.boxed_local()
|
|
})
|
|
}
|
|
}
|
|
|
|
pub fn op_write(
|
|
state: Rc<RefCell<OpState>>,
|
|
is_sync: bool,
|
|
rid: i32,
|
|
zero_copy: BufVec,
|
|
) -> MinimalOp {
|
|
debug!("write rid={}", rid);
|
|
match zero_copy.len() {
|
|
0 => return MinimalOp::Sync(Err(no_buffer_specified())),
|
|
1 => {}
|
|
_ => panic!("Invalid number of arguments"),
|
|
}
|
|
|
|
if is_sync {
|
|
MinimalOp::Sync({
|
|
// First we look up the rid in the resource table.
|
|
std_file_resource(&mut state.borrow_mut(), rid as u32, move |r| match r {
|
|
Ok(std_file) => {
|
|
use std::io::Write;
|
|
std_file
|
|
.write(&zero_copy[0])
|
|
.map(|nwritten: usize| nwritten as i32)
|
|
.map_err(AnyError::from)
|
|
}
|
|
Err(_) => Err(type_error("sync read not allowed on this resource")),
|
|
})
|
|
})
|
|
} else {
|
|
let zero_copy = zero_copy[0].clone();
|
|
MinimalOp::Async({
|
|
async move {
|
|
let resource = state
|
|
.borrow()
|
|
.resource_table
|
|
.get_any(rid as u32)
|
|
.ok_or_else(bad_resource_id)?;
|
|
let nwritten = if let Some(stream) =
|
|
resource.downcast_rc::<TcpStreamResource>()
|
|
{
|
|
stream.write(&zero_copy).await?
|
|
} else if let Some(stream) = resource.downcast_rc::<StreamResource>() {
|
|
stream.clone().write(&zero_copy).await?
|
|
} else {
|
|
return Err(bad_resource_id());
|
|
};
|
|
Ok(nwritten as i32)
|
|
}
|
|
.boxed_local()
|
|
})
|
|
}
|
|
}
|
|
|
|
pub fn std_file_resource<F, T>(
|
|
state: &mut OpState,
|
|
rid: u32,
|
|
mut f: F,
|
|
) -> Result<T, AnyError>
|
|
where
|
|
F: FnMut(Result<&mut std::fs::File, ()>) -> Result<T, AnyError>,
|
|
{
|
|
// First we look up the rid in the resource table.
|
|
let resource = state
|
|
.resource_table
|
|
.get::<StreamResource>(rid)
|
|
.ok_or_else(bad_resource_id)?;
|
|
|
|
// Sync write only works for FsFile. It doesn't make sense to do this
|
|
// for non-blocking sockets. So we error out if not FsFile.
|
|
if resource.fs_file.is_none() {
|
|
return f(Err(()));
|
|
}
|
|
|
|
// The object in the resource table is a tokio::fs::File - but in
|
|
// order to do a blocking write on it, we must turn it into a
|
|
// std::fs::File. Hopefully this code compiles down to nothing.
|
|
|
|
let fs_file_resource =
|
|
RcRef::map(&resource, |r| r.fs_file.as_ref().unwrap()).try_borrow_mut();
|
|
|
|
if let Some(mut fs_file) = fs_file_resource {
|
|
let tokio_file = fs_file.0.take().unwrap();
|
|
match tokio_file.try_into_std() {
|
|
Ok(mut std_file) => {
|
|
let result = f(Ok(&mut std_file));
|
|
// Turn the std_file handle back into a tokio file, put it back
|
|
// in the resource table.
|
|
let tokio_file = tokio::fs::File::from_std(std_file);
|
|
fs_file.0 = Some(tokio_file);
|
|
// return the result.
|
|
result
|
|
}
|
|
Err(tokio_file) => {
|
|
// This function will return an error containing the file if
|
|
// some operation is in-flight.
|
|
fs_file.0 = Some(tokio_file);
|
|
Err(resource_unavailable())
|
|
}
|
|
}
|
|
} else {
|
|
Err(resource_unavailable())
|
|
}
|
|
}
|