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async-tungstenite/src/async_std.rs

268 lines
8.6 KiB

//! `async-std` integration.
use tungstenite::handshake::client::Response;
use tungstenite::protocol::WebSocketConfig;
use tungstenite::Error;
use async_std::net::TcpStream;
use super::{domain, Request, WebSocketStream};
#[cfg(feature = "async-native-tls")]
use futures::io::{AsyncRead, AsyncWrite};
#[cfg(feature = "async-native-tls")]
pub(crate) mod async_native_tls {
use async_native_tls::TlsConnector as AsyncTlsConnector;
use async_native_tls::TlsStream;
use real_async_native_tls as async_native_tls;
use tungstenite::client::url_mode;
use tungstenite::stream::Mode;
use tungstenite::Error;
use futures::io::{AsyncRead, AsyncWrite};
use crate::stream::Stream as StreamSwitcher;
use crate::{
client_async_with_config, domain, Request, Response, WebSocketConfig, WebSocketStream,
};
/// A stream that might be protected with TLS.
pub type MaybeTlsStream<S> = StreamSwitcher<S, TlsStream<S>>;
pub type AutoStream<S> = MaybeTlsStream<S>;
pub type Connector = AsyncTlsConnector;
async fn wrap_stream<S>(
socket: S,
domain: String,
connector: Option<Connector>,
mode: Mode,
) -> Result<AutoStream<S>, Error>
where
S: 'static + AsyncRead + AsyncWrite + Unpin,
{
match mode {
Mode::Plain => Ok(StreamSwitcher::Plain(socket)),
Mode::Tls => {
let stream = {
let connector = if let Some(connector) = connector {
connector
} else {
AsyncTlsConnector::new()
};
connector
.connect(&domain, socket)
.await
.map_err(|err| std::io::Error::new(std::io::ErrorKind::Other, err))?
};
Ok(StreamSwitcher::Tls(stream))
}
}
}
/// Creates a WebSocket handshake from a request and a stream,
/// upgrading the stream to TLS if required and using the given
/// connector and WebSocket configuration.
pub async fn client_async_tls_with_connector_and_config<R, S>(
request: R,
stream: S,
connector: Option<AsyncTlsConnector>,
config: Option<WebSocketConfig>,
) -> Result<(WebSocketStream<AutoStream<S>>, Response), Error>
where
R: Into<Request<'static>> + Unpin,
S: 'static + AsyncRead + AsyncWrite + Unpin,
AutoStream<S>: Unpin,
{
let request: Request = request.into();
let domain = domain(&request)?;
// Make sure we check domain and mode first. URL must be valid.
let mode = url_mode(&request.url)?;
let stream = wrap_stream(stream, domain, connector, mode).await?;
client_async_with_config(request, stream, config).await
}
}
#[cfg(not(any(feature = "async-tls", feature = "async-native-tls")))]
pub(crate) mod dummy_tls {
use futures::io::{AsyncRead, AsyncWrite};
use tungstenite::client::url_mode;
use tungstenite::stream::Mode;
use tungstenite::Error;
use crate::{
client_async_with_config, domain, Request, Response, WebSocketConfig, WebSocketStream,
};
pub type AutoStream<S> = S;
type Connector = ();
async fn wrap_stream<S>(
socket: S,
_domain: String,
_connector: Option<()>,
mode: Mode,
) -> Result<AutoStream<S>, Error>
where
S: 'static + AsyncRead + AsyncWrite + Unpin,
{
match mode {
Mode::Plain => Ok(socket),
Mode::Tls => Err(Error::Url("TLS support not compiled in.".into())),
}
}
pub(crate) async fn client_async_tls_with_connector_and_config<R, S>(
request: R,
stream: S,
connector: Option<Connector>,
config: Option<WebSocketConfig>,
) -> Result<(WebSocketStream<AutoStream<S>>, Response), Error>
where
R: Into<Request<'static>> + Unpin,
S: 'static + AsyncRead + AsyncWrite + Unpin,
AutoStream<S>: Unpin,
{
let request: Request = request.into();
let domain = domain(&request)?;
// Make sure we check domain and mode first. URL must be valid.
let mode = url_mode(&request.url)?;
let stream = wrap_stream(stream, domain, connector, mode).await?;
client_async_with_config(request, stream, config).await
}
}
#[cfg(not(any(feature = "async-tls", feature = "async-native-tls")))]
use self::dummy_tls::{client_async_tls_with_connector_and_config, AutoStream};
#[cfg(all(feature = "async-tls", not(feature = "async-native-tls")))]
use crate::async_tls::{client_async_tls_with_connector_and_config, AutoStream};
#[cfg(all(feature = "async-tls", not(feature = "async-native-tls")))]
type Connector = real_async_tls::TlsConnector;
#[cfg(feature = "async-native-tls")]
use self::async_native_tls::{client_async_tls_with_connector_and_config, AutoStream, Connector};
#[cfg(feature = "async-native-tls")]
/// Creates a WebSocket handshake from a request and a stream,
/// upgrading the stream to TLS if required.
pub async fn client_async_tls<R, S>(
request: R,
stream: S,
) -> Result<(WebSocketStream<AutoStream<S>>, Response), Error>
where
R: Into<Request<'static>> + Unpin,
S: 'static + AsyncRead + AsyncWrite + Unpin,
AutoStream<S>: Unpin,
{
client_async_tls_with_connector_and_config(request, stream, None, None).await
}
#[cfg(feature = "async-native-tls")]
/// Creates a WebSocket handshake from a request and a stream,
/// upgrading the stream to TLS if required and using the given
/// WebSocket configuration.
pub async fn client_async_tls_with_config<R, S>(
request: R,
stream: S,
config: Option<WebSocketConfig>,
) -> Result<(WebSocketStream<AutoStream<S>>, Response), Error>
where
R: Into<Request<'static>> + Unpin,
S: 'static + AsyncRead + AsyncWrite + Unpin,
AutoStream<S>: Unpin,
{
client_async_tls_with_connector_and_config(request, stream, None, config).await
}
#[cfg(feature = "async-native-tls")]
/// Creates a WebSocket handshake from a request and a stream,
/// upgrading the stream to TLS if required and using the given
/// connector.
pub async fn client_async_tls_with_connector<R, S>(
request: R,
stream: S,
connector: Option<Connector>,
) -> Result<(WebSocketStream<AutoStream<S>>, Response), Error>
where
R: Into<Request<'static>> + Unpin,
S: 'static + AsyncRead + AsyncWrite + Unpin,
AutoStream<S>: Unpin,
{
client_async_tls_with_connector_and_config(request, stream, connector, None).await
}
/// Connect to a given URL.
pub async fn connect_async<R>(
request: R,
) -> Result<(WebSocketStream<AutoStream<TcpStream>>, Response), Error>
where
R: Into<Request<'static>> + Unpin,
{
connect_async_with_config(request, None).await
}
/// Connect to a given URL with a given WebSocket configuration.
pub async fn connect_async_with_config<R>(
request: R,
config: Option<WebSocketConfig>,
) -> Result<(WebSocketStream<AutoStream<TcpStream>>, Response), Error>
where
R: Into<Request<'static>> + Unpin,
{
let request: Request = request.into();
let domain = domain(&request)?;
let port = request
.url
.port_or_known_default()
.expect("Bug: port unknown");
let try_socket = TcpStream::connect((domain.as_str(), port)).await;
let socket = try_socket.map_err(Error::Io)?;
client_async_tls_with_connector_and_config(request, socket, None, config).await
}
#[cfg(any(feature = "async-tls", feature = "async-native-tls"))]
/// Connect to a given URL using the provided TLS connector.
pub async fn connect_async_with_tls_connector<R>(
request: R,
connector: Option<Connector>,
) -> Result<(WebSocketStream<AutoStream<TcpStream>>, Response), Error>
where
R: Into<Request<'static>> + Unpin,
{
connect_async_with_tls_connector_and_config(request, connector, None).await
}
#[cfg(any(feature = "async-tls", feature = "async-native-tls"))]
/// Connect to a given URL using the provided TLS connector.
pub async fn connect_async_with_tls_connector_and_config<R>(
request: R,
connector: Option<Connector>,
config: Option<WebSocketConfig>,
) -> Result<(WebSocketStream<AutoStream<TcpStream>>, Response), Error>
where
R: Into<Request<'static>> + Unpin,
{
let request: Request = request.into();
let domain = domain(&request)?;
let port = request
.url
.port_or_known_default()
.expect("Bug: port unknown");
let try_socket = TcpStream::connect((domain.as_str(), port)).await;
let socket = try_socket.map_err(Error::Io)?;
client_async_tls_with_connector_and_config(request, socket, connector, config).await
}