mirror of
https://github.com/denoland/deno.git
synced 2024-11-21 15:04:11 -05:00
692 lines
18 KiB
Rust
692 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::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::error::{bad_resource_id, not_supported};
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use deno_core::futures::future::FutureExt;
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use deno_core::serde_json;
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use deno_core::serde_json::json;
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use deno_core::serde_json::Value;
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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 deno_core::ZeroCopyBuf;
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use serde::Deserialize;
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use std::borrow::Cow;
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use std::cell::RefCell;
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use std::convert::TryInto;
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use std::io::Read;
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use std::io::Write;
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use std::rc::Rc;
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use tokio::io::split;
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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::io::ReadHalf;
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use tokio::io::WriteHalf;
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use tokio::net::tcp;
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use tokio::net::TcpStream;
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use tokio::process;
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use tokio_rustls as tls;
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#[cfg(unix)]
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use std::os::unix::io::FromRawFd;
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#[cfg(unix)]
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use tokio::net::unix;
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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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super::reg_json_async(rt, "op_shutdown", op_shutdown);
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}
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pub fn get_stdio() -> (
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Option<StdFileResource>,
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Option<StdFileResource>,
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Option<StdFileResource>,
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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<StdFileResource> {
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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(StdFileResource::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 WriteOnlyResource<S> {
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stream: AsyncRefCell<S>,
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}
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impl<S: 'static> From<S> for WriteOnlyResource<S> {
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fn from(stream: S) -> Self {
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Self {
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stream: stream.into(),
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}
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}
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}
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impl<S> WriteOnlyResource<S>
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where
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S: AsyncWrite + Unpin + 'static,
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{
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pub fn borrow_mut(self: &Rc<Self>) -> AsyncMutFuture<S> {
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RcRef::map(self, |r| &r.stream).borrow_mut()
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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 stream = self.borrow_mut().await;
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let nwritten = stream.write(buf).await?;
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Ok(nwritten)
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}
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async fn shutdown(self: &Rc<Self>) -> Result<(), AnyError> {
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let mut stream = self.borrow_mut().await;
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stream.shutdown().await?;
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Ok(())
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}
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}
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#[derive(Debug)]
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pub struct ReadOnlyResource<S> {
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stream: AsyncRefCell<S>,
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cancel_handle: CancelHandle,
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}
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impl<S: 'static> From<S> for ReadOnlyResource<S> {
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fn from(stream: S) -> Self {
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Self {
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stream: stream.into(),
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cancel_handle: Default::default(),
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}
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}
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}
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impl<S> ReadOnlyResource<S>
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where
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S: AsyncRead + Unpin + 'static,
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{
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pub fn borrow_mut(self: &Rc<Self>) -> AsyncMutFuture<S> {
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RcRef::map(self, |r| &r.stream).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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async fn read(self: &Rc<Self>, buf: &mut [u8]) -> Result<usize, AnyError> {
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let mut rd = self.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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}
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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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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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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 FullDuplexSplitResource<S> =
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FullDuplexResource<ReadHalf<S>, WriteHalf<S>>;
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impl<S> From<S> for FullDuplexSplitResource<S>
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where
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S: AsyncRead + AsyncWrite + 'static,
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{
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fn from(stream: S) -> Self {
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Self::new(split(stream))
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}
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}
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pub type ChildStdinResource = WriteOnlyResource<process::ChildStdin>;
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impl Resource for ChildStdinResource {
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fn name(&self) -> Cow<str> {
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"childStdin".into()
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}
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}
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pub type ChildStdoutResource = ReadOnlyResource<process::ChildStdout>;
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impl Resource for ChildStdoutResource {
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fn name(&self) -> Cow<str> {
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"childStdout".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 ChildStderrResource = ReadOnlyResource<process::ChildStderr>;
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impl Resource for ChildStderrResource {
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fn name(&self) -> Cow<str> {
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"childStderr".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 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 TlsClientStreamResource =
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FullDuplexSplitResource<tls::client::TlsStream<TcpStream>>;
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impl Resource for TlsClientStreamResource {
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fn name(&self) -> Cow<str> {
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"tlsClientStream".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 TlsServerStreamResource =
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FullDuplexSplitResource<tls::server::TlsStream<TcpStream>>;
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impl Resource for TlsServerStreamResource {
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fn name(&self) -> Cow<str> {
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"tlsServerStream".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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struct UnixStreamResource;
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#[cfg(not(unix))]
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impl UnixStreamResource {
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async fn read(self: &Rc<Self>, _buf: &mut [u8]) -> Result<usize, AnyError> {
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unreachable!()
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}
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async fn write(self: &Rc<Self>, _buf: &[u8]) -> Result<usize, AnyError> {
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unreachable!()
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}
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async fn shutdown(self: &Rc<Self>) -> Result<(), AnyError> {
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unreachable!()
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}
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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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#[derive(Debug, Default)]
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pub struct StdFileResource {
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pub fs_file:
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Option<AsyncRefCell<(Option<tokio::fs::File>, Option<FileMetadata>)>>,
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cancel: CancelHandle,
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name: String,
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}
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impl StdFileResource {
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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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async fn read(self: &Rc<Self>, buf: &mut [u8]) -> Result<usize, AnyError> {
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if self.fs_file.is_some() {
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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 {
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Err(resource_unavailable())
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}
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}
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async fn write(self: &Rc<Self>, buf: &[u8]) -> Result<usize, AnyError> {
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if self.fs_file.is_some() {
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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 {
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Err(resource_unavailable())
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}
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}
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pub fn with<F, R>(
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state: &mut OpState,
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rid: u32,
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mut f: F,
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) -> Result<R, AnyError>
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where
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F: FnMut(Result<&mut std::fs::File, ()>) -> Result<R, AnyError>,
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{
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// First we look up the rid in the resource table.
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let resource = state
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.resource_table
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.get::<StdFileResource>(rid)
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.ok_or_else(bad_resource_id)?;
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// Sync write only works for FsFile. It doesn't make sense to do this
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// for non-blocking sockets. So we error out if not FsFile.
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if resource.fs_file.is_none() {
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return f(Err(()));
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}
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// The object in the resource table is a tokio::fs::File - but in
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// order to do a blocking write on it, we must turn it into a
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// std::fs::File. Hopefully this code compiles down to nothing.
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let fs_file_resource =
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RcRef::map(&resource, |r| r.fs_file.as_ref().unwrap()).try_borrow_mut();
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if let Some(mut fs_file) = fs_file_resource {
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let tokio_file = fs_file.0.take().unwrap();
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match tokio_file.try_into_std() {
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Ok(mut std_file) => {
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let result = f(Ok(&mut std_file));
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// Turn the std_file handle back into a tokio file, put it back
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// in the resource table.
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let tokio_file = tokio::fs::File::from_std(std_file);
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fs_file.0 = Some(tokio_file);
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// return the result.
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result
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}
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Err(tokio_file) => {
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// This function will return an error containing the file if
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// some operation is in-flight.
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fs_file.0 = Some(tokio_file);
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Err(resource_unavailable())
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}
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}
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} else {
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Err(resource_unavailable())
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}
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}
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}
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impl Resource for StdFileResource {
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fn name(&self) -> Cow<str> {
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self.name.as_str().into()
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}
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|
|
|
fn close(self: Rc<Self>) {
|
|
// TODO: do not cancel file I/O when file is writable.
|
|
self.cancel.cancel()
|
|
}
|
|
}
|
|
|
|
pub fn op_read(
|
|
state: Rc<RefCell<OpState>>,
|
|
is_sync: bool,
|
|
rid: i32,
|
|
bufs: BufVec,
|
|
) -> MinimalOp {
|
|
match bufs.len() {
|
|
0 => return MinimalOp::Sync(Err(no_buffer_specified())),
|
|
1 => {}
|
|
_ => panic!("Invalid number of arguments"),
|
|
};
|
|
let buf = bufs.into_iter().next().unwrap();
|
|
|
|
if is_sync {
|
|
MinimalOp::Sync(op_read_sync(state, rid, buf))
|
|
} else {
|
|
MinimalOp::Async(op_read_async(state, rid, buf).boxed_local())
|
|
}
|
|
}
|
|
|
|
fn op_read_sync(
|
|
state: Rc<RefCell<OpState>>,
|
|
rid: i32,
|
|
mut buf: ZeroCopyBuf,
|
|
) -> Result<i32, AnyError> {
|
|
let rid = rid.try_into().map_err(|_| bad_resource_id())?;
|
|
StdFileResource::with(&mut state.borrow_mut(), rid, move |r| match r {
|
|
Ok(std_file) => std_file
|
|
.read(&mut buf)
|
|
.map(|n: usize| n as i32)
|
|
.map_err(AnyError::from),
|
|
Err(_) => Err(not_supported()),
|
|
})
|
|
}
|
|
|
|
async fn op_read_async(
|
|
state: Rc<RefCell<OpState>>,
|
|
rid: i32,
|
|
mut buf: ZeroCopyBuf,
|
|
) -> Result<i32, AnyError> {
|
|
let rid = rid.try_into().map_err(|_| bad_resource_id())?;
|
|
let resource = state
|
|
.borrow()
|
|
.resource_table
|
|
.get_any(rid)
|
|
.ok_or_else(bad_resource_id)?;
|
|
let nread = if let Some(s) = resource.downcast_rc::<ChildStdoutResource>() {
|
|
s.read(&mut buf).await?
|
|
} else if let Some(s) = resource.downcast_rc::<ChildStderrResource>() {
|
|
s.read(&mut buf).await?
|
|
} else if let Some(s) = resource.downcast_rc::<TcpStreamResource>() {
|
|
s.read(&mut buf).await?
|
|
} else if let Some(s) = resource.downcast_rc::<TlsClientStreamResource>() {
|
|
s.read(&mut buf).await?
|
|
} else if let Some(s) = resource.downcast_rc::<TlsServerStreamResource>() {
|
|
s.read(&mut buf).await?
|
|
} else if let Some(s) = resource.downcast_rc::<UnixStreamResource>() {
|
|
s.read(&mut buf).await?
|
|
} else if let Some(s) = resource.downcast_rc::<StdFileResource>() {
|
|
s.read(&mut buf).await?
|
|
} else {
|
|
return Err(not_supported());
|
|
};
|
|
Ok(nread as i32)
|
|
}
|
|
|
|
pub fn op_write(
|
|
state: Rc<RefCell<OpState>>,
|
|
is_sync: bool,
|
|
rid: i32,
|
|
bufs: BufVec,
|
|
) -> MinimalOp {
|
|
match bufs.len() {
|
|
0 => return MinimalOp::Sync(Err(no_buffer_specified())),
|
|
1 => {}
|
|
_ => panic!("Invalid number of arguments"),
|
|
};
|
|
let buf = bufs.into_iter().next().unwrap();
|
|
|
|
if is_sync {
|
|
MinimalOp::Sync(op_write_sync(state, rid, buf))
|
|
} else {
|
|
MinimalOp::Async(op_write_async(state, rid, buf).boxed_local())
|
|
}
|
|
}
|
|
|
|
fn op_write_sync(
|
|
state: Rc<RefCell<OpState>>,
|
|
rid: i32,
|
|
buf: ZeroCopyBuf,
|
|
) -> Result<i32, AnyError> {
|
|
let rid = rid.try_into().map_err(|_| bad_resource_id())?;
|
|
StdFileResource::with(&mut state.borrow_mut(), rid, move |r| match r {
|
|
Ok(std_file) => std_file
|
|
.write(&buf)
|
|
.map(|nwritten: usize| nwritten as i32)
|
|
.map_err(AnyError::from),
|
|
Err(_) => Err(not_supported()),
|
|
})
|
|
}
|
|
|
|
async fn op_write_async(
|
|
state: Rc<RefCell<OpState>>,
|
|
rid: i32,
|
|
buf: ZeroCopyBuf,
|
|
) -> Result<i32, AnyError> {
|
|
let rid = rid.try_into().map_err(|_| bad_resource_id())?;
|
|
let resource = state
|
|
.borrow()
|
|
.resource_table
|
|
.get_any(rid)
|
|
.ok_or_else(bad_resource_id)?;
|
|
let nwritten = if let Some(s) = resource.downcast_rc::<ChildStdinResource>() {
|
|
s.write(&buf).await?
|
|
} else if let Some(s) = resource.downcast_rc::<TcpStreamResource>() {
|
|
s.write(&buf).await?
|
|
} else if let Some(s) = resource.downcast_rc::<TlsClientStreamResource>() {
|
|
s.write(&buf).await?
|
|
} else if let Some(s) = resource.downcast_rc::<TlsServerStreamResource>() {
|
|
s.write(&buf).await?
|
|
} else if let Some(s) = resource.downcast_rc::<UnixStreamResource>() {
|
|
s.write(&buf).await?
|
|
} else if let Some(s) = resource.downcast_rc::<StdFileResource>() {
|
|
s.write(&buf).await?
|
|
} else {
|
|
return Err(not_supported());
|
|
};
|
|
Ok(nwritten as i32)
|
|
}
|
|
|
|
#[derive(Deserialize)]
|
|
struct ShutdownArgs {
|
|
rid: i32,
|
|
}
|
|
|
|
async fn op_shutdown(
|
|
state: Rc<RefCell<OpState>>,
|
|
args: Value,
|
|
_zero_copy: BufVec,
|
|
) -> Result<Value, AnyError> {
|
|
let rid = serde_json::from_value::<ShutdownArgs>(args)?
|
|
.rid
|
|
.try_into()
|
|
.map_err(|_| bad_resource_id())?;
|
|
let resource = state
|
|
.borrow()
|
|
.resource_table
|
|
.get_any(rid)
|
|
.ok_or_else(bad_resource_id)?;
|
|
if let Some(s) = resource.downcast_rc::<ChildStdinResource>() {
|
|
s.shutdown().await?;
|
|
} else if let Some(s) = resource.downcast_rc::<TcpStreamResource>() {
|
|
s.shutdown().await?;
|
|
} else if let Some(s) = resource.downcast_rc::<TlsClientStreamResource>() {
|
|
s.shutdown().await?;
|
|
} else if let Some(s) = resource.downcast_rc::<TlsServerStreamResource>() {
|
|
s.shutdown().await?;
|
|
} else if let Some(s) = resource.downcast_rc::<UnixStreamResource>() {
|
|
s.shutdown().await?;
|
|
} else {
|
|
return Err(not_supported());
|
|
}
|
|
Ok(json!({}))
|
|
}
|