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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
use deno_core::anyhow::Error;
use deno_core::op;
use deno_core::AsyncRefCell;
use deno_core::AsyncResult;
use deno_core::JsRuntime;
use deno_core::OpState;
use deno_core::Resource;
use deno_core::ResourceId;
use deno_core::ZeroCopyBuf;
use std::cell::RefCell;
use std::env;
use std::net::SocketAddr;
use std::rc::Rc;
use tokio::io::AsyncReadExt;
use tokio::io::AsyncWriteExt;
// This is a hack to make the `#[op]` macro work with
// deno_core examples.
// You can remove this:
use deno_core::*;
// Note: a `tokio::net::TcpListener` doesn't need to be wrapped in a cell,
// because it only supports one op (`accept`) which does not require a mutable
// reference to the listener.
struct TcpListener {
inner: tokio::net::TcpListener,
}
impl TcpListener {
async fn accept(self: Rc<Self>) -> Result<TcpStream, std::io::Error> {
let stream = self.inner.accept().await?.0.into();
Ok(stream)
}
}
impl Resource for TcpListener {
fn close(self: Rc<Self>) {}
}
impl TryFrom<std::net::TcpListener> for TcpListener {
type Error = std::io::Error;
fn try_from(
std_listener: std::net::TcpListener,
) -> Result<Self, Self::Error> {
tokio::net::TcpListener::try_from(std_listener).map(|tokio_listener| Self {
inner: tokio_listener,
})
}
}
struct TcpStream {
rd: AsyncRefCell<tokio::net::tcp::OwnedReadHalf>,
wr: AsyncRefCell<tokio::net::tcp::OwnedWriteHalf>,
}
impl TcpStream {
async fn read(self: Rc<Self>, data: &mut [u8]) -> Result<usize, Error> {
let mut rd = RcRef::map(&self, |r| &r.rd).borrow_mut().await;
let nread = rd.read(data).await?;
Ok(nread)
}
async fn write(self: Rc<Self>, data: &[u8]) -> Result<usize, Error> {
let mut wr = RcRef::map(self, |r| &r.wr).borrow_mut().await;
let nwritten = wr.write(data).await?;
Ok(nwritten)
}
fn try_write(self: Rc<Self>, data: &[u8]) -> Result<usize, Error> {
let wr = RcRef::map(self, |r| &r.wr)
.try_borrow_mut()
.ok_or_else(|| Error::msg("Failed to acquire lock on TcpStream"))?;
let nwritten = wr.try_write(data)?;
Ok(nwritten)
}
}
impl Resource for TcpStream {
deno_core::impl_readable_byob!();
deno_core::impl_writable!();
fn close(self: Rc<Self>) {}
}
impl From<tokio::net::TcpStream> for TcpStream {
fn from(s: tokio::net::TcpStream) -> Self {
let (rd, wr) = s.into_split();
Self {
rd: rd.into(),
wr: wr.into(),
}
}
}
fn create_js_runtime() -> JsRuntime {
let ext = deno_core::Extension::builder("my_ext")
.ops(vec![
op_listen::decl(),
op_accept::decl(),
op_try_write::decl(),
op_read_socket::decl(),
])
.build();
JsRuntime::new(deno_core::RuntimeOptions {
extensions: vec![ext],
will_snapshot: false,
..Default::default()
})
}
#[op]
async fn op_read_socket(
state: Rc<RefCell<OpState>>,
rid: ResourceId,
mut data: ZeroCopyBuf,
) -> Result<u32, Error> {
let resource = state.borrow_mut().resource_table.get::<TcpStream>(rid)?;
let nread = resource.read(&mut data).await?;
Ok(nread as u32)
}
#[op]
fn op_listen(state: &mut OpState) -> Result<ResourceId, Error> {
let addr = "127.0.0.1:4570".parse::<SocketAddr>().unwrap();
let std_listener = std::net::TcpListener::bind(addr)?;
std_listener.set_nonblocking(true)?;
let listener = TcpListener::try_from(std_listener)?;
let rid = state.resource_table.add(listener);
Ok(rid)
}
#[op]
async fn op_accept(
state: Rc<RefCell<OpState>>,
rid: ResourceId,
) -> Result<ResourceId, Error> {
let listener = state.borrow().resource_table.get::<TcpListener>(rid)?;
let stream = listener.accept().await?;
let rid = state.borrow_mut().resource_table.add(stream);
Ok(rid)
}
#[op(fast)]
fn op_try_write(
state: &mut OpState,
rid: u32,
value: &[u8],
) -> Result<bool, Error> {
let stream = state.resource_table.get::<TcpStream>(rid)?;
Ok(stream.try_write(value).is_ok())
}
fn main() {
// NOTE: `--help` arg will display V8 help and exit
deno_core::v8_set_flags(env::args().collect());
let mut js_runtime = create_js_runtime();
let runtime = tokio::runtime::Builder::new_current_thread()
.enable_io()
.build()
.unwrap();
let future = async move {
js_runtime
.execute_script(
"http_bench_json_ops.js",
include_str!("http_bench_json_ops.js"),
)
.unwrap();
js_runtime.run_event_loop(false).await
};
runtime.block_on(future).unwrap();
}
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