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denoland-deno/cli/tools/jupyter/server.rs
2024-01-04 20:34:51 +01:00

721 lines
21 KiB
Rust

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
// This file is forked/ported from <https://github.com/evcxr/evcxr>
// Copyright 2020 The Evcxr Authors. MIT license.
use std::cell::RefCell;
use std::collections::HashMap;
use std::rc::Rc;
use std::sync::Arc;
use crate::cdp;
use crate::tools::repl;
use deno_core::error::AnyError;
use deno_core::futures;
use deno_core::serde_json;
use deno_core::serde_json::json;
use deno_core::CancelFuture;
use deno_core::CancelHandle;
use tokio::sync::mpsc;
use tokio::sync::Mutex;
use zeromq::SocketRecv;
use zeromq::SocketSend;
use super::jupyter_msg::Connection;
use super::jupyter_msg::JupyterMessage;
use super::ConnectionSpec;
pub enum StdioMsg {
Stdout(String),
Stderr(String),
}
pub struct JupyterServer {
execution_count: usize,
last_execution_request: Rc<RefCell<Option<JupyterMessage>>>,
// This is Arc<Mutex<>>, so we don't hold RefCell borrows across await
// points.
iopub_socket: Arc<Mutex<Connection<zeromq::PubSocket>>>,
repl_session: repl::ReplSession,
}
impl JupyterServer {
pub async fn start(
spec: ConnectionSpec,
mut stdio_rx: mpsc::UnboundedReceiver<StdioMsg>,
mut repl_session: repl::ReplSession,
) -> Result<(), AnyError> {
let mut heartbeat =
bind_socket::<zeromq::RepSocket>(&spec, spec.hb_port).await?;
let shell_socket =
bind_socket::<zeromq::RouterSocket>(&spec, spec.shell_port).await?;
let control_socket =
bind_socket::<zeromq::RouterSocket>(&spec, spec.control_port).await?;
let _stdin_socket =
bind_socket::<zeromq::RouterSocket>(&spec, spec.stdin_port).await?;
let iopub_socket =
bind_socket::<zeromq::PubSocket>(&spec, spec.iopub_port).await?;
let iopub_socket = Arc::new(Mutex::new(iopub_socket));
let last_execution_request = Rc::new(RefCell::new(None));
// Store `iopub_socket` in the op state so it's accessible to the runtime API.
{
let op_state_rc = repl_session.worker.js_runtime.op_state();
let mut op_state = op_state_rc.borrow_mut();
op_state.put(iopub_socket.clone());
op_state.put(last_execution_request.clone());
}
let cancel_handle = CancelHandle::new_rc();
let cancel_handle2 = CancelHandle::new_rc();
let mut server = Self {
execution_count: 0,
iopub_socket: iopub_socket.clone(),
last_execution_request: last_execution_request.clone(),
repl_session,
};
let handle1 = deno_core::unsync::spawn(async move {
if let Err(err) = Self::handle_heartbeat(&mut heartbeat).await {
eprintln!("Heartbeat error: {}", err);
}
});
let handle2 = deno_core::unsync::spawn(async move {
if let Err(err) =
Self::handle_control(control_socket, cancel_handle2).await
{
eprintln!("Control error: {}", err);
}
});
let handle3 = deno_core::unsync::spawn(async move {
if let Err(err) = server.handle_shell(shell_socket).await {
eprintln!("Shell error: {}", err);
}
});
let handle4 = deno_core::unsync::spawn(async move {
while let Some(stdio_msg) = stdio_rx.recv().await {
Self::handle_stdio_msg(
iopub_socket.clone(),
last_execution_request.clone(),
stdio_msg,
)
.await;
}
});
let join_fut =
futures::future::try_join_all(vec![handle1, handle2, handle3, handle4]);
if let Ok(result) = join_fut.or_cancel(cancel_handle).await {
result?;
}
Ok(())
}
async fn handle_stdio_msg<S: zeromq::SocketSend>(
iopub_socket: Arc<Mutex<Connection<S>>>,
last_execution_request: Rc<RefCell<Option<JupyterMessage>>>,
stdio_msg: StdioMsg,
) {
let maybe_exec_result = last_execution_request.borrow().clone();
if let Some(exec_request) = maybe_exec_result {
let (name, text) = match stdio_msg {
StdioMsg::Stdout(text) => ("stdout", text),
StdioMsg::Stderr(text) => ("stderr", text),
};
let result = exec_request
.new_message("stream")
.with_content(json!({
"name": name,
"text": text
}))
.send(&mut *iopub_socket.lock().await)
.await;
if let Err(err) = result {
eprintln!("Output {} error: {}", name, err);
}
}
}
async fn handle_heartbeat(
connection: &mut Connection<zeromq::RepSocket>,
) -> Result<(), AnyError> {
loop {
connection.socket.recv().await?;
connection
.socket
.send(zeromq::ZmqMessage::from(b"ping".to_vec()))
.await?;
}
}
async fn handle_control(
mut connection: Connection<zeromq::RouterSocket>,
cancel_handle: Rc<CancelHandle>,
) -> Result<(), AnyError> {
loop {
let msg = JupyterMessage::read(&mut connection).await?;
match msg.message_type() {
"kernel_info_request" => {
msg
.new_reply()
.with_content(kernel_info())
.send(&mut connection)
.await?;
}
"shutdown_request" => {
cancel_handle.cancel();
}
"interrupt_request" => {
eprintln!("Interrupt request currently not supported");
}
_ => {
eprintln!(
"Unrecognized control message type: {}",
msg.message_type()
);
}
}
}
}
async fn handle_shell(
&mut self,
mut connection: Connection<zeromq::RouterSocket>,
) -> Result<(), AnyError> {
loop {
let msg = JupyterMessage::read(&mut connection).await?;
self.handle_shell_message(msg, &mut connection).await?;
}
}
async fn handle_shell_message(
&mut self,
msg: JupyterMessage,
connection: &mut Connection<zeromq::RouterSocket>,
) -> Result<(), AnyError> {
msg
.new_message("status")
.with_content(json!({"execution_state": "busy"}))
.send(&mut *self.iopub_socket.lock().await)
.await?;
match msg.message_type() {
"kernel_info_request" => {
msg
.new_reply()
.with_content(kernel_info())
.send(connection)
.await?;
}
"is_complete_request" => {
msg
.new_reply()
.with_content(json!({"status": "complete"}))
.send(connection)
.await?;
}
"execute_request" => {
self
.handle_execution_request(msg.clone(), connection)
.await?;
}
"comm_open" => {
msg
.comm_close_message()
.send(&mut *self.iopub_socket.lock().await)
.await?;
}
"complete_request" => {
let user_code = msg.code();
let cursor_pos = msg.cursor_pos();
let lsp_completions = self
.repl_session
.language_server
.completions(user_code, cursor_pos)
.await;
if !lsp_completions.is_empty() {
let matches: Vec<String> = lsp_completions
.iter()
.map(|item| item.new_text.clone())
.collect();
let cursor_start = lsp_completions
.first()
.map(|item| item.range.start)
.unwrap_or(cursor_pos);
let cursor_end = lsp_completions
.last()
.map(|item| item.range.end)
.unwrap_or(cursor_pos);
msg
.new_reply()
.with_content(json!({
"status": "ok",
"matches": matches,
"cursor_start": cursor_start,
"cursor_end": cursor_end,
"metadata": {},
}))
.send(connection)
.await?;
} else {
let expr = get_expr_from_line_at_pos(user_code, cursor_pos);
// check if the expression is in the form `obj.prop`
let (completions, cursor_start) = if let Some(index) = expr.rfind('.')
{
let sub_expr = &expr[..index];
let prop_name = &expr[index + 1..];
let candidates =
get_expression_property_names(&mut self.repl_session, sub_expr)
.await
.into_iter()
.filter(|n| {
!n.starts_with("Symbol(")
&& n.starts_with(prop_name)
&& n != &*repl::REPL_INTERNALS_NAME
})
.collect();
(candidates, cursor_pos - prop_name.len())
} else {
// combine results of declarations and globalThis properties
let mut candidates = get_expression_property_names(
&mut self.repl_session,
"globalThis",
)
.await
.into_iter()
.chain(get_global_lexical_scope_names(&mut self.repl_session).await)
.filter(|n| n.starts_with(expr) && n != &*repl::REPL_INTERNALS_NAME)
.collect::<Vec<_>>();
// sort and remove duplicates
candidates.sort();
candidates.dedup(); // make sure to sort first
(candidates, cursor_pos - expr.len())
};
msg
.new_reply()
.with_content(json!({
"status": "ok",
"matches": completions,
"cursor_start": cursor_start,
"cursor_end": cursor_pos,
"metadata": {},
}))
.send(connection)
.await?;
}
}
"comm_msg" | "comm_info_request" | "history_request" => {
// We don't handle these messages
}
_ => {
eprintln!("Unrecognized shell message type: {}", msg.message_type());
}
}
msg
.new_message("status")
.with_content(json!({"execution_state": "idle"}))
.send(&mut *self.iopub_socket.lock().await)
.await?;
Ok(())
}
async fn handle_execution_request(
&mut self,
msg: JupyterMessage,
connection: &mut Connection<zeromq::RouterSocket>,
) -> Result<(), AnyError> {
self.execution_count += 1;
*self.last_execution_request.borrow_mut() = Some(msg.clone());
msg
.new_message("execute_input")
.with_content(json!({
"execution_count": self.execution_count,
"code": msg.code()
}))
.send(&mut *self.iopub_socket.lock().await)
.await?;
let result = self
.repl_session
.evaluate_line_with_object_wrapping(msg.code())
.await;
let evaluate_response = match result {
Ok(eval_response) => eval_response,
Err(err) => {
msg
.new_message("error")
.with_content(json!({
"ename": err.to_string(),
"evalue": " ", // Fake value, otherwise old Jupyter frontends don't show the error
"traceback": [],
}))
.send(&mut *self.iopub_socket.lock().await)
.await?;
msg
.new_reply()
.with_content(json!({
"status": "error",
"execution_count": self.execution_count,
}))
.send(connection)
.await?;
return Ok(());
}
};
let cdp::EvaluateResponse {
result,
exception_details,
} = evaluate_response.value;
if exception_details.is_none() {
publish_result(&mut self.repl_session, &result, self.execution_count)
.await?;
msg
.new_reply()
.with_content(json!({
"status": "ok",
"execution_count": self.execution_count,
}))
.send(connection)
.await?;
// Let's sleep here for a few ms, so we give a chance to the task that is
// handling stdout and stderr streams to receive and flush the content.
// Otherwise, executing multiple cells one-by-one might lead to output
// from various cells be grouped together in another cell result.
tokio::time::sleep(std::time::Duration::from_millis(5)).await;
} else if let Some(exception_details) = exception_details {
// Determine the exception value and name
let (name, message, stack) =
if let Some(exception) = exception_details.exception {
let result = self
.repl_session
.call_function_on_args(
r#"
function(object) {
if (object instanceof Error) {
const name = "name" in object ? String(object.name) : "";
const message = "message" in object ? String(object.message) : "";
const stack = "stack" in object ? String(object.stack) : "";
return JSON.stringify({ name, message, stack });
} else {
const message = String(object);
return JSON.stringify({ name: "", message, stack: "" });
}
}
"#
.into(),
&[exception],
)
.await?;
match result.result.value {
Some(serde_json::Value::String(str)) => {
if let Ok(object) =
serde_json::from_str::<HashMap<String, String>>(&str)
{
let get = |k| object.get(k).cloned().unwrap_or_default();
(get("name"), get("message"), get("stack"))
} else {
eprintln!("Unexpected result while parsing JSON {str}");
("".into(), "".into(), "".into())
}
}
_ => {
eprintln!("Unexpected result while parsing exception {result:?}");
("".into(), "".into(), "".into())
}
}
} else {
eprintln!("Unexpectedly missing exception {exception_details:?}");
("".into(), "".into(), "".into())
};
let stack = if stack.is_empty() {
format!(
"{}\n at <unknown>",
serde_json::to_string(&message).unwrap()
)
} else {
stack
};
let traceback = format!("Stack trace:\n{stack}")
.split('\n')
.map(|s| s.to_owned())
.collect::<Vec<_>>();
let ename = if name.is_empty() {
"Unknown error".into()
} else {
name
};
let evalue = if message.is_empty() {
"(none)".into()
} else {
message
};
msg
.new_message("error")
.with_content(json!({
"ename": ename,
"evalue": evalue,
"traceback": traceback,
}))
.send(&mut *self.iopub_socket.lock().await)
.await?;
msg
.new_reply()
.with_content(json!({
"status": "error",
"execution_count": self.execution_count,
}))
.send(connection)
.await?;
}
Ok(())
}
}
async fn bind_socket<S: zeromq::Socket>(
config: &ConnectionSpec,
port: u32,
) -> Result<Connection<S>, AnyError> {
let endpoint = format!("{}://{}:{}", config.transport, config.ip, port);
let mut socket = S::new();
socket.bind(&endpoint).await?;
Ok(Connection::new(socket, &config.key))
}
fn kernel_info() -> serde_json::Value {
json!({
"status": "ok",
"protocol_version": "5.3",
"implementation_version": crate::version::deno(),
"implementation": "Deno kernel",
"language_info": {
"name": "typescript",
"version": crate::version::TYPESCRIPT,
"mimetype": "text/x.typescript",
"file_extension": ".ts",
"pygments_lexer": "typescript",
"nb_converter": "script"
},
"help_links": [{
"text": "Visit Deno manual",
"url": "https://deno.land/manual"
}],
"banner": "Welcome to Deno kernel",
})
}
async fn publish_result(
session: &mut repl::ReplSession,
evaluate_result: &cdp::RemoteObject,
execution_count: usize,
) -> Result<Option<HashMap<String, serde_json::Value>>, AnyError> {
let arg0 = cdp::CallArgument {
value: Some(serde_json::Value::Number(execution_count.into())),
unserializable_value: None,
object_id: None,
};
let arg1 = cdp::CallArgument::from(evaluate_result);
let response = session
.post_message_with_event_loop(
"Runtime.callFunctionOn",
Some(json!({
"functionDeclaration": r#"async function (execution_count, result) {
await Deno[Deno.internal].jupyter.broadcastResult(execution_count, result);
}"#,
"arguments": [arg0, arg1],
"executionContextId": session.context_id,
"awaitPromise": true,
})),
)
.await?;
let response: cdp::CallFunctionOnResponse = serde_json::from_value(response)?;
if let Some(exception_details) = &response.exception_details {
// If the object doesn't have a Jupyter.display method or it throws an
// exception, we just ignore it and let the caller handle it.
eprintln!("Exception encountered: {}", exception_details.text);
return Ok(None);
}
Ok(None)
}
// TODO(bartlomieju): dedup with repl::editor
fn get_expr_from_line_at_pos(line: &str, cursor_pos: usize) -> &str {
let start = line[..cursor_pos].rfind(is_word_boundary).unwrap_or(0);
let end = line[cursor_pos..]
.rfind(is_word_boundary)
.map(|i| cursor_pos + i)
.unwrap_or(cursor_pos);
let word = &line[start..end];
let word = word.strip_prefix(is_word_boundary).unwrap_or(word);
let word = word.strip_suffix(is_word_boundary).unwrap_or(word);
word
}
// TODO(bartlomieju): dedup with repl::editor
fn is_word_boundary(c: char) -> bool {
if matches!(c, '.' | '_' | '$') {
false
} else {
char::is_ascii_whitespace(&c) || char::is_ascii_punctuation(&c)
}
}
// TODO(bartlomieju): dedup with repl::editor
async fn get_global_lexical_scope_names(
session: &mut repl::ReplSession,
) -> Vec<String> {
let evaluate_response = session
.post_message_with_event_loop(
"Runtime.globalLexicalScopeNames",
Some(cdp::GlobalLexicalScopeNamesArgs {
execution_context_id: Some(session.context_id),
}),
)
.await
.unwrap();
let evaluate_response: cdp::GlobalLexicalScopeNamesResponse =
serde_json::from_value(evaluate_response).unwrap();
evaluate_response.names
}
// TODO(bartlomieju): dedup with repl::editor
async fn get_expression_property_names(
session: &mut repl::ReplSession,
expr: &str,
) -> Vec<String> {
// try to get the properties from the expression
if let Some(properties) = get_object_expr_properties(session, expr).await {
return properties;
}
// otherwise fall back to the prototype
let expr_type = get_expression_type(session, expr).await;
let object_expr = match expr_type.as_deref() {
// possibilities: https://chromedevtools.github.io/devtools-protocol/v8/Runtime/#type-RemoteObject
Some("object") => "Object.prototype",
Some("function") => "Function.prototype",
Some("string") => "String.prototype",
Some("boolean") => "Boolean.prototype",
Some("bigint") => "BigInt.prototype",
Some("number") => "Number.prototype",
_ => return Vec::new(), // undefined, symbol, and unhandled
};
get_object_expr_properties(session, object_expr)
.await
.unwrap_or_default()
}
// TODO(bartlomieju): dedup with repl::editor
async fn get_expression_type(
session: &mut repl::ReplSession,
expr: &str,
) -> Option<String> {
evaluate_expression(session, expr)
.await
.map(|res| res.result.kind)
}
// TODO(bartlomieju): dedup with repl::editor
async fn get_object_expr_properties(
session: &mut repl::ReplSession,
object_expr: &str,
) -> Option<Vec<String>> {
let evaluate_result = evaluate_expression(session, object_expr).await?;
let object_id = evaluate_result.result.object_id?;
let get_properties_response = session
.post_message_with_event_loop(
"Runtime.getProperties",
Some(cdp::GetPropertiesArgs {
object_id,
own_properties: None,
accessor_properties_only: None,
generate_preview: None,
non_indexed_properties_only: Some(true),
}),
)
.await
.ok()?;
let get_properties_response: cdp::GetPropertiesResponse =
serde_json::from_value(get_properties_response).ok()?;
Some(
get_properties_response
.result
.into_iter()
.map(|prop| prop.name)
.collect(),
)
}
// TODO(bartlomieju): dedup with repl::editor
async fn evaluate_expression(
session: &mut repl::ReplSession,
expr: &str,
) -> Option<cdp::EvaluateResponse> {
let evaluate_response = session
.post_message_with_event_loop(
"Runtime.evaluate",
Some(cdp::EvaluateArgs {
expression: expr.to_string(),
object_group: None,
include_command_line_api: None,
silent: None,
context_id: Some(session.context_id),
return_by_value: None,
generate_preview: None,
user_gesture: None,
await_promise: None,
throw_on_side_effect: Some(true),
timeout: Some(200),
disable_breaks: None,
repl_mode: None,
allow_unsafe_eval_blocked_by_csp: None,
unique_context_id: None,
}),
)
.await
.ok()?;
let evaluate_response: cdp::EvaluateResponse =
serde_json::from_value(evaluate_response).ok()?;
if evaluate_response.exception_details.is_some() {
None
} else {
Some(evaluate_response)
}
}