mirror of
https://github.com/denoland/deno.git
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727 lines
19 KiB
Rust
727 lines
19 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use crate::stream::WebSocketStream;
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use bytes::Bytes;
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use deno_core::error::invalid_hostname;
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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::op;
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use deno_core::url;
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use deno_core::AsyncMutFuture;
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use deno_core::AsyncRefCell;
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use deno_core::ByteString;
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use deno_core::CancelFuture;
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use deno_core::CancelHandle;
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use deno_core::JsBuffer;
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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::ResourceId;
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use deno_core::ToJsBuffer;
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use deno_net::raw::NetworkStream;
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use deno_tls::create_client_config;
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use deno_tls::RootCertStoreProvider;
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use http::header::CONNECTION;
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use http::header::UPGRADE;
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use http::HeaderName;
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use http::HeaderValue;
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use http::Method;
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use http::Request;
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use http::Uri;
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use hyper::Body;
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use once_cell::sync::Lazy;
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use serde::Serialize;
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use std::borrow::Cow;
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use std::cell::Cell;
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use std::cell::RefCell;
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use std::convert::TryFrom;
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use std::fmt;
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use std::future::Future;
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use std::path::PathBuf;
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use std::rc::Rc;
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use std::sync::Arc;
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use tokio::io::AsyncRead;
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use tokio::io::AsyncWrite;
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use tokio::net::TcpStream;
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use tokio_rustls::rustls::RootCertStore;
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use tokio_rustls::rustls::ServerName;
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use tokio_rustls::TlsConnector;
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use fastwebsockets::CloseCode;
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use fastwebsockets::FragmentCollector;
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use fastwebsockets::Frame;
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use fastwebsockets::OpCode;
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use fastwebsockets::Role;
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use fastwebsockets::WebSocket;
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mod stream;
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static USE_WRITEV: Lazy<bool> = Lazy::new(|| {
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let enable = std::env::var("DENO_USE_WRITEV").ok();
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if let Some(val) = enable {
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return !val.is_empty();
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}
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false
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});
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#[derive(Clone)]
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pub struct WsRootStoreProvider(Option<Arc<dyn RootCertStoreProvider>>);
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impl WsRootStoreProvider {
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pub fn get_or_try_init(&self) -> Result<Option<RootCertStore>, AnyError> {
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Ok(match &self.0 {
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Some(provider) => Some(provider.get_or_try_init()?.clone()),
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None => None,
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})
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}
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}
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#[derive(Clone)]
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pub struct WsUserAgent(pub String);
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pub trait WebSocketPermissions {
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fn check_net_url(
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&mut self,
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_url: &url::Url,
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_api_name: &str,
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) -> Result<(), AnyError>;
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}
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/// `UnsafelyIgnoreCertificateErrors` is a wrapper struct so it can be placed inside `GothamState`;
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/// using type alias for a `Option<Vec<String>>` could work, but there's a high chance
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/// that there might be another type alias pointing to a `Option<Vec<String>>`, which
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/// would override previously used alias.
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pub struct UnsafelyIgnoreCertificateErrors(Option<Vec<String>>);
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pub struct WsCancelResource(Rc<CancelHandle>);
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impl Resource for WsCancelResource {
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fn name(&self) -> Cow<str> {
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"webSocketCancel".into()
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}
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fn close(self: Rc<Self>) {
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self.0.cancel()
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}
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}
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// This op is needed because creating a WS instance in JavaScript is a sync
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// operation and should throw error when permissions are not fulfilled,
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// but actual op that connects WS is async.
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#[op]
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pub fn op_ws_check_permission_and_cancel_handle<WP>(
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state: &mut OpState,
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api_name: String,
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url: String,
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cancel_handle: bool,
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) -> Result<Option<ResourceId>, AnyError>
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where
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WP: WebSocketPermissions + 'static,
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{
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state
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.borrow_mut::<WP>()
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.check_net_url(&url::Url::parse(&url)?, &api_name)?;
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if cancel_handle {
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let rid = state
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.resource_table
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.add(WsCancelResource(CancelHandle::new_rc()));
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Ok(Some(rid))
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} else {
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Ok(None)
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}
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}
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#[derive(Serialize)]
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#[serde(rename_all = "camelCase")]
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pub struct CreateResponse {
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rid: ResourceId,
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protocol: String,
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extensions: String,
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}
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async fn handshake<S: AsyncRead + AsyncWrite + Send + Unpin + 'static>(
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cancel_resource: Option<Rc<CancelHandle>>,
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request: Request<Body>,
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socket: S,
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) -> Result<(WebSocket<WebSocketStream>, http::Response<Body>), AnyError> {
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let client =
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fastwebsockets::handshake::client(&LocalExecutor, request, socket);
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let (upgraded, response) = if let Some(cancel_resource) = cancel_resource {
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client.or_cancel(cancel_resource).await?
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} else {
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client.await
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}
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.map_err(|err| {
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DomExceptionNetworkError::new(&format!(
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"failed to connect to WebSocket: {err}"
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))
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})?;
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let upgraded = upgraded.into_inner();
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let stream =
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WebSocketStream::new(stream::WsStreamKind::Upgraded(upgraded), None);
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let stream = WebSocket::after_handshake(stream, Role::Client);
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Ok((stream, response))
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}
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#[op]
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pub async fn op_ws_create<WP>(
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state: Rc<RefCell<OpState>>,
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api_name: String,
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url: String,
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protocols: String,
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cancel_handle: Option<ResourceId>,
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headers: Option<Vec<(ByteString, ByteString)>>,
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) -> Result<CreateResponse, AnyError>
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where
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WP: WebSocketPermissions + 'static,
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{
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{
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let mut s = state.borrow_mut();
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s.borrow_mut::<WP>()
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.check_net_url(&url::Url::parse(&url)?, &api_name)
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.expect(
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"Permission check should have been done in op_ws_check_permission",
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);
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}
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let cancel_resource = if let Some(cancel_rid) = cancel_handle {
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let r = state
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.borrow_mut()
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.resource_table
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.get::<WsCancelResource>(cancel_rid)?;
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Some(r.0.clone())
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} else {
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None
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};
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let unsafely_ignore_certificate_errors = state
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.borrow()
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.try_borrow::<UnsafelyIgnoreCertificateErrors>()
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.and_then(|it| it.0.clone());
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let root_cert_store = state
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.borrow()
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.borrow::<WsRootStoreProvider>()
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.get_or_try_init()?;
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let user_agent = state.borrow().borrow::<WsUserAgent>().0.clone();
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let uri: Uri = url.parse()?;
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let mut request = Request::builder().method(Method::GET).uri(
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uri
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.path_and_query()
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.ok_or(type_error("Missing path in url".to_string()))?
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.as_str(),
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);
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let authority = uri.authority().unwrap().as_str();
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let host = authority
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.find('@')
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.map(|idx| authority.split_at(idx + 1).1)
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.unwrap_or_else(|| authority);
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request = request
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.header("User-Agent", user_agent)
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.header("Host", host)
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.header(UPGRADE, "websocket")
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.header(CONNECTION, "Upgrade")
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.header(
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"Sec-WebSocket-Key",
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fastwebsockets::handshake::generate_key(),
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)
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.header("Sec-WebSocket-Version", "13");
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if !protocols.is_empty() {
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request = request.header("Sec-WebSocket-Protocol", protocols);
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}
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if let Some(headers) = headers {
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for (key, value) in headers {
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let name = HeaderName::from_bytes(&key)
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.map_err(|err| type_error(err.to_string()))?;
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let v = HeaderValue::from_bytes(&value)
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.map_err(|err| type_error(err.to_string()))?;
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let is_disallowed_header = matches!(
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name,
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http::header::HOST
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| http::header::SEC_WEBSOCKET_ACCEPT
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| http::header::SEC_WEBSOCKET_EXTENSIONS
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| http::header::SEC_WEBSOCKET_KEY
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| http::header::SEC_WEBSOCKET_PROTOCOL
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| http::header::SEC_WEBSOCKET_VERSION
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| http::header::UPGRADE
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| http::header::CONNECTION
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);
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if !is_disallowed_header {
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request = request.header(name, v);
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}
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}
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}
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let request = request.body(Body::empty())?;
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let domain = &uri.host().unwrap().to_string();
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let port = &uri.port_u16().unwrap_or(match uri.scheme_str() {
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Some("wss") => 443,
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Some("ws") => 80,
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_ => unreachable!(),
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});
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let addr = format!("{domain}:{port}");
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let tcp_socket = TcpStream::connect(addr).await?;
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let (stream, response) = match uri.scheme_str() {
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Some("ws") => handshake(cancel_resource, request, tcp_socket).await?,
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Some("wss") => {
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let tls_config = create_client_config(
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root_cert_store,
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vec![],
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unsafely_ignore_certificate_errors,
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None,
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)?;
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let tls_connector = TlsConnector::from(Arc::new(tls_config));
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let dnsname = ServerName::try_from(domain.as_str())
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.map_err(|_| invalid_hostname(domain))?;
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let tls_socket = tls_connector.connect(dnsname, tcp_socket).await?;
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handshake(cancel_resource, request, tls_socket).await?
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}
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_ => unreachable!(),
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};
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if let Some(cancel_rid) = cancel_handle {
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if let Ok(res) = state.borrow_mut().resource_table.take_any(cancel_rid) {
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res.close();
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}
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}
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let mut state = state.borrow_mut();
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let rid = state.resource_table.add(ServerWebSocket::new(stream));
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let protocol = match response.headers().get("Sec-WebSocket-Protocol") {
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Some(header) => header.to_str().unwrap(),
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None => "",
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};
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let extensions = response
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.headers()
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.get_all("Sec-WebSocket-Extensions")
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.iter()
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.map(|header| header.to_str().unwrap())
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.collect::<String>();
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Ok(CreateResponse {
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rid,
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protocol: protocol.to_string(),
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extensions,
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})
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}
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#[repr(u16)]
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pub enum MessageKind {
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Text = 0,
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Binary = 1,
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Pong = 2,
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Error = 3,
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ClosedDefault = 1005,
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}
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/// To avoid locks, we keep as much as we can inside of [`Cell`]s.
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pub struct ServerWebSocket {
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buffered: Cell<usize>,
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error: Cell<Option<String>>,
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errored: Cell<bool>,
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closed: Cell<bool>,
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buffer: Cell<Option<Vec<u8>>>,
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string: Cell<Option<String>>,
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ws: AsyncRefCell<FragmentCollector<WebSocketStream>>,
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tx_lock: AsyncRefCell<()>,
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}
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impl ServerWebSocket {
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fn new(ws: WebSocket<WebSocketStream>) -> Self {
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Self {
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buffered: Cell::new(0),
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error: Cell::new(None),
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errored: Cell::new(false),
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closed: Cell::new(false),
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buffer: Cell::new(None),
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string: Cell::new(None),
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ws: AsyncRefCell::new(FragmentCollector::new(ws)),
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tx_lock: AsyncRefCell::new(()),
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}
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}
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fn set_error(&self, error: Option<String>) {
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if let Some(error) = error {
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self.error.set(Some(error));
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self.errored.set(true);
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} else {
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self.error.set(None);
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self.errored.set(false);
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}
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}
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/// Reserve a lock, but don't wait on it. This gets us our place in line.
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pub fn reserve_lock(self: &Rc<Self>) -> AsyncMutFuture<()> {
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RcRef::map(self, |r| &r.tx_lock).borrow_mut()
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}
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#[inline]
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pub async fn write_frame(
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self: &Rc<Self>,
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lock: AsyncMutFuture<()>,
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frame: Frame<'_>,
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) -> Result<(), AnyError> {
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lock.await;
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// SAFETY: fastwebsockets only needs a mutable reference to the WebSocket
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// to populate the write buffer. We encounter an await point when writing
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// to the socket after the frame has already been written to the buffer.
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let ws = unsafe { &mut *self.ws.as_ptr() };
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ws.write_frame(frame)
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.await
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.map_err(|err| type_error(err.to_string()))?;
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Ok(())
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}
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}
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impl Resource for ServerWebSocket {
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fn name(&self) -> Cow<str> {
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"serverWebSocket".into()
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}
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}
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pub fn ws_create_server_stream(
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state: &mut OpState,
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transport: NetworkStream,
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read_buf: Bytes,
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) -> Result<ResourceId, AnyError> {
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let mut ws = WebSocket::after_handshake(
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WebSocketStream::new(
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stream::WsStreamKind::Network(transport),
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Some(read_buf),
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),
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Role::Server,
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);
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ws.set_writev(*USE_WRITEV);
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ws.set_auto_close(true);
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ws.set_auto_pong(true);
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let rid = state.resource_table.add(ServerWebSocket::new(ws));
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Ok(rid)
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}
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#[op(fast)]
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pub fn op_ws_send_binary(state: &mut OpState, rid: ResourceId, data: &[u8]) {
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let resource = state.resource_table.get::<ServerWebSocket>(rid).unwrap();
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let data = data.to_vec();
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let len = data.len();
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resource.buffered.set(resource.buffered.get() + len);
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let lock = resource.reserve_lock();
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deno_core::unsync::spawn(async move {
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if let Err(err) = resource
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.write_frame(lock, Frame::new(true, OpCode::Binary, None, data.into()))
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.await
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{
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resource.set_error(Some(err.to_string()));
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} else {
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resource.buffered.set(resource.buffered.get() - len);
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}
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});
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}
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#[op(fast)]
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pub fn op_ws_send_text(state: &mut OpState, rid: ResourceId, data: String) {
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let resource = state.resource_table.get::<ServerWebSocket>(rid).unwrap();
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let len = data.len();
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resource.buffered.set(resource.buffered.get() + len);
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let lock = resource.reserve_lock();
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deno_core::unsync::spawn(async move {
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if let Err(err) = resource
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.write_frame(
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lock,
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Frame::new(true, OpCode::Text, None, data.into_bytes().into()),
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)
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.await
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{
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resource.set_error(Some(err.to_string()));
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} else {
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resource.buffered.set(resource.buffered.get() - len);
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}
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});
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}
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/// Async version of send. Does not update buffered amount as we rely on the socket itself for backpressure.
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#[op(fast)]
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pub async fn op_ws_send_binary_async(
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state: Rc<RefCell<OpState>>,
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rid: ResourceId,
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data: JsBuffer,
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) -> Result<(), AnyError> {
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let resource = state
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.borrow_mut()
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.resource_table
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.get::<ServerWebSocket>(rid)?;
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let data = data.to_vec();
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let lock = resource.reserve_lock();
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resource
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.write_frame(lock, Frame::new(true, OpCode::Binary, None, data.into()))
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.await
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}
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/// Async version of send. Does not update buffered amount as we rely on the socket itself for backpressure.
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#[op(fast)]
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pub async fn op_ws_send_text_async(
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state: Rc<RefCell<OpState>>,
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rid: ResourceId,
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data: String,
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) -> Result<(), AnyError> {
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let resource = state
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.borrow_mut()
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.resource_table
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.get::<ServerWebSocket>(rid)?;
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let lock = resource.reserve_lock();
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resource
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.write_frame(
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lock,
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Frame::new(true, OpCode::Text, None, data.into_bytes().into()),
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)
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.await
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}
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const EMPTY_PAYLOAD: &[u8] = &[];
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#[op(fast)]
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pub fn op_ws_get_buffered_amount(state: &mut OpState, rid: ResourceId) -> u32 {
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state
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.resource_table
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.get::<ServerWebSocket>(rid)
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.unwrap()
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.buffered
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.get() as u32
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}
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#[op]
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pub async fn op_ws_send_pong(
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state: Rc<RefCell<OpState>>,
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rid: ResourceId,
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) -> Result<(), AnyError> {
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let resource = state
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.borrow_mut()
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.resource_table
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.get::<ServerWebSocket>(rid)?;
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let lock = resource.reserve_lock();
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resource
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.write_frame(lock, Frame::pong(EMPTY_PAYLOAD.into()))
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.await
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}
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|
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#[op]
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pub async fn op_ws_send_ping(
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state: Rc<RefCell<OpState>>,
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rid: ResourceId,
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) -> Result<(), AnyError> {
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let resource = state
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.borrow_mut()
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.resource_table
|
|
.get::<ServerWebSocket>(rid)?;
|
|
let lock = resource.reserve_lock();
|
|
resource
|
|
.write_frame(
|
|
lock,
|
|
Frame::new(true, OpCode::Ping, None, EMPTY_PAYLOAD.into()),
|
|
)
|
|
.await
|
|
}
|
|
|
|
#[op(deferred)]
|
|
pub async fn op_ws_close(
|
|
state: Rc<RefCell<OpState>>,
|
|
rid: ResourceId,
|
|
code: Option<u16>,
|
|
reason: Option<String>,
|
|
) -> Result<(), AnyError> {
|
|
let resource = state
|
|
.borrow_mut()
|
|
.resource_table
|
|
.get::<ServerWebSocket>(rid)?;
|
|
let frame = reason
|
|
.map(|reason| Frame::close(code.unwrap_or(1005), reason.as_bytes()))
|
|
.unwrap_or_else(|| Frame::close_raw(vec![].into()));
|
|
|
|
resource.closed.set(true);
|
|
let lock = resource.reserve_lock();
|
|
resource.write_frame(lock, frame).await?;
|
|
Ok(())
|
|
}
|
|
|
|
#[op]
|
|
pub fn op_ws_get_buffer(state: &mut OpState, rid: ResourceId) -> ToJsBuffer {
|
|
let resource = state.resource_table.get::<ServerWebSocket>(rid).unwrap();
|
|
resource.buffer.take().unwrap().into()
|
|
}
|
|
|
|
#[op]
|
|
pub fn op_ws_get_buffer_as_string(
|
|
state: &mut OpState,
|
|
rid: ResourceId,
|
|
) -> String {
|
|
let resource = state.resource_table.get::<ServerWebSocket>(rid).unwrap();
|
|
resource.string.take().unwrap()
|
|
}
|
|
|
|
#[op]
|
|
pub fn op_ws_get_error(state: &mut OpState, rid: ResourceId) -> String {
|
|
let Ok(resource) = state.resource_table.get::<ServerWebSocket>(rid) else {
|
|
return "Bad resource".into();
|
|
};
|
|
resource.errored.set(false);
|
|
resource.error.take().unwrap_or_default()
|
|
}
|
|
|
|
#[op(fast)]
|
|
pub async fn op_ws_next_event(
|
|
state: Rc<RefCell<OpState>>,
|
|
rid: ResourceId,
|
|
) -> u16 {
|
|
let Ok(resource) = state
|
|
.borrow_mut()
|
|
.resource_table
|
|
.get::<ServerWebSocket>(rid)
|
|
else {
|
|
// op_ws_get_error will correctly handle a bad resource
|
|
return MessageKind::Error as u16;
|
|
};
|
|
|
|
// If there's a pending error, this always returns error
|
|
if resource.errored.get() {
|
|
return MessageKind::Error as u16;
|
|
}
|
|
|
|
let mut ws = RcRef::map(&resource, |r| &r.ws).borrow_mut().await;
|
|
loop {
|
|
let val = match ws.read_frame().await {
|
|
Ok(val) => val,
|
|
Err(err) => {
|
|
// No message was received, socket closed while we waited.
|
|
// Report closed status to JavaScript.
|
|
if resource.closed.get() {
|
|
return MessageKind::ClosedDefault as u16;
|
|
}
|
|
|
|
resource.set_error(Some(err.to_string()));
|
|
return MessageKind::Error as u16;
|
|
}
|
|
};
|
|
|
|
break match val.opcode {
|
|
OpCode::Text => match String::from_utf8(val.payload.to_vec()) {
|
|
Ok(s) => {
|
|
resource.string.set(Some(s));
|
|
MessageKind::Text as u16
|
|
}
|
|
Err(_) => {
|
|
resource.set_error(Some("Invalid string data".into()));
|
|
MessageKind::Error as u16
|
|
}
|
|
},
|
|
OpCode::Binary => {
|
|
resource.buffer.set(Some(val.payload.to_vec()));
|
|
MessageKind::Binary as u16
|
|
}
|
|
OpCode::Close => {
|
|
// Close reason is returned through error
|
|
if val.payload.len() < 2 {
|
|
resource.set_error(None);
|
|
MessageKind::ClosedDefault as u16
|
|
} else {
|
|
let close_code = CloseCode::from(u16::from_be_bytes([
|
|
val.payload[0],
|
|
val.payload[1],
|
|
]));
|
|
let reason = String::from_utf8(val.payload[2..].to_vec()).ok();
|
|
resource.set_error(reason);
|
|
close_code.into()
|
|
}
|
|
}
|
|
OpCode::Pong => MessageKind::Pong as u16,
|
|
OpCode::Continuation | OpCode::Ping => {
|
|
continue;
|
|
}
|
|
};
|
|
}
|
|
}
|
|
|
|
deno_core::extension!(deno_websocket,
|
|
deps = [ deno_url, deno_webidl ],
|
|
parameters = [P: WebSocketPermissions],
|
|
ops = [
|
|
op_ws_check_permission_and_cancel_handle<P>,
|
|
op_ws_create<P>,
|
|
op_ws_close,
|
|
op_ws_next_event,
|
|
op_ws_get_buffer,
|
|
op_ws_get_buffer_as_string,
|
|
op_ws_get_error,
|
|
op_ws_send_binary,
|
|
op_ws_send_text,
|
|
op_ws_send_binary_async,
|
|
op_ws_send_text_async,
|
|
op_ws_send_ping,
|
|
op_ws_send_pong,
|
|
op_ws_get_buffered_amount,
|
|
],
|
|
esm = [ "01_websocket.js", "02_websocketstream.js" ],
|
|
options = {
|
|
user_agent: String,
|
|
root_cert_store_provider: Option<Arc<dyn RootCertStoreProvider>>,
|
|
unsafely_ignore_certificate_errors: Option<Vec<String>>
|
|
},
|
|
state = |state, options| {
|
|
state.put::<WsUserAgent>(WsUserAgent(options.user_agent));
|
|
state.put(UnsafelyIgnoreCertificateErrors(
|
|
options.unsafely_ignore_certificate_errors,
|
|
));
|
|
state.put::<WsRootStoreProvider>(WsRootStoreProvider(options.root_cert_store_provider));
|
|
},
|
|
);
|
|
|
|
pub fn get_declaration() -> PathBuf {
|
|
PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("lib.deno_websocket.d.ts")
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub struct DomExceptionNetworkError {
|
|
pub msg: String,
|
|
}
|
|
|
|
impl DomExceptionNetworkError {
|
|
pub fn new(msg: &str) -> Self {
|
|
DomExceptionNetworkError {
|
|
msg: msg.to_string(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl fmt::Display for DomExceptionNetworkError {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
f.pad(&self.msg)
|
|
}
|
|
}
|
|
|
|
impl std::error::Error for DomExceptionNetworkError {}
|
|
|
|
pub fn get_network_error_class_name(e: &AnyError) -> Option<&'static str> {
|
|
e.downcast_ref::<DomExceptionNetworkError>()
|
|
.map(|_| "DOMExceptionNetworkError")
|
|
}
|
|
|
|
// Needed so hyper can use non Send futures
|
|
#[derive(Clone)]
|
|
struct LocalExecutor;
|
|
|
|
impl<Fut> hyper::rt::Executor<Fut> for LocalExecutor
|
|
where
|
|
Fut: Future + 'static,
|
|
Fut::Output: 'static,
|
|
{
|
|
fn execute(&self, fut: Fut) {
|
|
deno_core::unsync::spawn(fut);
|
|
}
|
|
}
|