1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
//! `tokio` integration.
use tungstenite::client::IntoClientRequest;
use tungstenite::handshake::client::{Request, Response};
use tungstenite::handshake::server::{Callback, NoCallback};
use tungstenite::protocol::WebSocketConfig;
use tungstenite::Error;

use tokio::net::TcpStream;

use super::{domain, port, WebSocketStream};

use futures_io::{AsyncRead, AsyncWrite};

#[cfg(feature = "tokio-native-tls")]
#[path = "tokio/native_tls.rs"]
mod tls;

#[cfg(all(
    any(
        feature = "tokio-rustls-manual-roots",
        feature = "tokio-rustls-native-certs",
        feature = "tokio-rustls-webpki-roots"
    ),
    not(feature = "tokio-native-tls")
))]
#[path = "tokio/rustls.rs"]
mod tls;

#[cfg(all(
    feature = "tokio-openssl",
    not(any(
        feature = "tokio-native-tls",
        feature = "tokio-rustls-manual-roots",
        feature = "tokio-rustls-native-certs",
        feature = "tokio-rustls-webpki-roots"
    ))
))]
#[path = "tokio/openssl.rs"]
mod tls;

#[cfg(all(
    feature = "async-tls",
    not(any(
        feature = "tokio-native-tls",
        feature = "tokio-rustls-manual-roots",
        feature = "tokio-rustls-native-certs",
        feature = "tokio-rustls-webpki-roots",
        feature = "tokio-openssl"
    ))
))]
#[path = "tokio/async_tls.rs"]
mod tls;

#[cfg(not(any(
    feature = "tokio-native-tls",
    feature = "tokio-rustls-manual-roots",
    feature = "tokio-rustls-native-certs",
    feature = "tokio-rustls-webpki-roots",
    feature = "tokio-openssl",
    feature = "async-tls"
)))]
#[path = "tokio/dummy_tls.rs"]
mod tls;

#[cfg(any(
    feature = "tokio-native-tls",
    feature = "tokio-rustls-manual-roots",
    feature = "tokio-rustls-native-certs",
    feature = "tokio-rustls-webpki-roots",
    feature = "tokio-openssl",
    feature = "async-tls",
))]
pub use self::tls::client_async_tls_with_connector_and_config;
#[cfg(any(
    feature = "tokio-native-tls",
    feature = "tokio-rustls-manual-roots",
    feature = "tokio-rustls-native-certs",
    feature = "tokio-rustls-webpki-roots",
    feature = "tokio-openssl",
    feature = "async-tls"
))]
use self::tls::{AutoStream, Connector};

#[cfg(not(any(
    feature = "tokio-native-tls",
    feature = "tokio-rustls-manual-roots",
    feature = "tokio-rustls-native-certs",
    feature = "tokio-rustls-webpki-roots",
    feature = "tokio-openssl",
    feature = "async-tls"
)))]
pub use self::tls::client_async_tls_with_connector_and_config;
#[cfg(not(any(
    feature = "tokio-native-tls",
    feature = "tokio-rustls-manual-roots",
    feature = "tokio-rustls-native-certs",
    feature = "tokio-rustls-webpki-roots",
    feature = "tokio-openssl",
    feature = "async-tls"
)))]
use self::tls::AutoStream;

/// Creates a WebSocket handshake from a request and a stream.
/// For convenience, the user may call this with a url string, a URL,
/// or a `Request`. Calling with `Request` allows the user to add
/// a WebSocket protocol or other custom headers.
///
/// Internally, this custom creates a handshake representation and returns
/// a future representing the resolution of the WebSocket handshake. The
/// returned future will resolve to either `WebSocketStream<S>` or `Error`
/// depending on whether the handshake is successful.
///
/// This is typically used for clients who have already established, for
/// example, a TCP connection to the remote server.
pub async fn client_async<'a, R, S>(
    request: R,
    stream: S,
) -> Result<(WebSocketStream<TokioAdapter<S>>, Response), Error>
where
    R: IntoClientRequest + Unpin,
    S: tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin,
{
    client_async_with_config(request, stream, None).await
}

/// The same as `client_async()` but the one can specify a websocket configuration.
/// Please refer to `client_async()` for more details.
pub async fn client_async_with_config<'a, R, S>(
    request: R,
    stream: S,
    config: Option<WebSocketConfig>,
) -> Result<(WebSocketStream<TokioAdapter<S>>, Response), Error>
where
    R: IntoClientRequest + Unpin,
    S: tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin,
{
    crate::client_async_with_config(request, TokioAdapter::new(stream), config).await
}

/// Accepts a new WebSocket connection with the provided stream.
///
/// This function will internally call `server::accept` to create a
/// handshake representation and returns a future representing the
/// resolution of the WebSocket handshake. The returned future will resolve
/// to either `WebSocketStream<S>` or `Error` depending if it's successful
/// or not.
///
/// This is typically used after a socket has been accepted from a
/// `TcpListener`. That socket is then passed to this function to perform
/// the server half of the accepting a client's websocket connection.
pub async fn accept_async<S>(stream: S) -> Result<WebSocketStream<TokioAdapter<S>>, Error>
where
    S: tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin,
{
    accept_hdr_async(stream, NoCallback).await
}

/// The same as `accept_async()` but the one can specify a websocket configuration.
/// Please refer to `accept_async()` for more details.
pub async fn accept_async_with_config<S>(
    stream: S,
    config: Option<WebSocketConfig>,
) -> Result<WebSocketStream<TokioAdapter<S>>, Error>
where
    S: tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin,
{
    accept_hdr_async_with_config(stream, NoCallback, config).await
}

/// Accepts a new WebSocket connection with the provided stream.
///
/// This function does the same as `accept_async()` but accepts an extra callback
/// for header processing. The callback receives headers of the incoming
/// requests and is able to add extra headers to the reply.
pub async fn accept_hdr_async<S, C>(
    stream: S,
    callback: C,
) -> Result<WebSocketStream<TokioAdapter<S>>, Error>
where
    S: tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin,
    C: Callback + Unpin,
{
    accept_hdr_async_with_config(stream, callback, None).await
}

/// The same as `accept_hdr_async()` but the one can specify a websocket configuration.
/// Please refer to `accept_hdr_async()` for more details.
pub async fn accept_hdr_async_with_config<S, C>(
    stream: S,
    callback: C,
    config: Option<WebSocketConfig>,
) -> Result<WebSocketStream<TokioAdapter<S>>, Error>
where
    S: tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin,
    C: Callback + Unpin,
{
    crate::accept_hdr_async_with_config(TokioAdapter::new(stream), callback, config).await
}

/// Type alias for the stream type of the `client_async()` functions.
pub type ClientStream<S> = AutoStream<S>;

#[cfg(any(
    feature = "tokio-native-tls",
    feature = "tokio-rustls-native-certs",
    feature = "tokio-rustls-webpki-roots",
    all(feature = "__rustls-tls", not(feature = "tokio-rustls-manual-roots")), // No roots will be available
    all(feature = "async-tls", not(feature = "tokio-openssl"))
))]
/// 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<ClientStream<S>>, Response), Error>
where
    R: IntoClientRequest + Unpin,
    S: 'static + tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin,
    AutoStream<S>: Unpin,
{
    client_async_tls_with_connector_and_config(request, stream, None, None).await
}

#[cfg(any(
    feature = "tokio-native-tls",
    feature = "tokio-rustls-native-certs",
    feature = "tokio-rustls-webpki-roots",
    all(feature = "__rustls-tls", not(feature = "tokio-rustls-manual-roots")), // No roots will be available
    all(feature = "async-tls", not(feature = "tokio-openssl"))
))]
/// 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<ClientStream<S>>, Response), Error>
where
    R: IntoClientRequest + Unpin,
    S: 'static + tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin,
    AutoStream<S>: Unpin,
{
    client_async_tls_with_connector_and_config(request, stream, None, config).await
}

#[cfg(any(
    feature = "tokio-native-tls",
    feature = "tokio-rustls-manual-roots",
    feature = "tokio-rustls-native-certs",
    feature = "tokio-rustls-webpki-roots",
    all(feature = "async-tls", not(feature = "tokio-openssl"))
))]
/// 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<ClientStream<S>>, Response), Error>
where
    R: IntoClientRequest + Unpin,
    S: 'static + tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin,
    AutoStream<S>: Unpin,
{
    client_async_tls_with_connector_and_config(request, stream, connector, None).await
}

#[cfg(all(
    feature = "tokio-openssl",
    not(any(
        feature = "tokio-native-tls",
        feature = "tokio-rustls-manual-roots",
        feature = "tokio-rustls-native-certs",
        feature = "tokio-rustls-webpki-roots"
    ))
))]
/// 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<ClientStream<S>>, Response), Error>
where
    R: IntoClientRequest + Unpin,
    S: 'static
        + tokio::io::AsyncRead
        + tokio::io::AsyncWrite
        + Unpin
        + std::fmt::Debug
        + Send
        + Sync,
    AutoStream<S>: Unpin,
{
    client_async_tls_with_connector_and_config(request, stream, None, None).await
}

#[cfg(all(
    feature = "tokio-openssl",
    not(any(
        feature = "tokio-native-tls",
        feature = "tokio-rustls-manual-roots",
        feature = "tokio-rustls-native-certs",
        feature = "tokio-rustls-webpki-roots"
    ))
))]
/// 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<ClientStream<S>>, Response), Error>
where
    R: IntoClientRequest + Unpin,
    S: 'static
        + tokio::io::AsyncRead
        + tokio::io::AsyncWrite
        + Unpin
        + std::fmt::Debug
        + Send
        + Sync,
    AutoStream<S>: Unpin,
{
    client_async_tls_with_connector_and_config(request, stream, None, config).await
}

#[cfg(all(
    feature = "tokio-openssl",
    not(any(
        feature = "tokio-native-tls",
        feature = "tokio-rustls-manual-roots",
        feature = "tokio-rustls-native-certs",
        feature = "tokio-rustls-webpki-roots"
    ))
))]
/// 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<ClientStream<S>>, Response), Error>
where
    R: IntoClientRequest + Unpin,
    S: 'static
        + tokio::io::AsyncRead
        + tokio::io::AsyncWrite
        + Unpin
        + std::fmt::Debug
        + Send
        + Sync,
    AutoStream<S>: Unpin,
{
    client_async_tls_with_connector_and_config(request, stream, connector, None).await
}

/// Type alias for the stream type of the `connect_async()` functions.
pub type ConnectStream = ClientStream<TcpStream>;

/// Connect to a given URL.
pub async fn connect_async<R>(
    request: R,
) -> Result<(WebSocketStream<ConnectStream>, Response), Error>
where
    R: IntoClientRequest + 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<ConnectStream>, Response), Error>
where
    R: IntoClientRequest + Unpin,
{
    let request: Request = request.into_client_request()?;

    let domain = domain(&request)?;
    let port = port(&request)?;

    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 = "tokio-native-tls",
    feature = "tokio-rustls-manual-roots",
    feature = "tokio-rustls-native-certs",
    feature = "tokio-rustls-webpki-roots",
    feature = "tokio-openssl"
))]
/// 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<ConnectStream>, Response), Error>
where
    R: IntoClientRequest + Unpin,
{
    connect_async_with_tls_connector_and_config(request, connector, None).await
}

#[cfg(any(
    feature = "async-tls",
    feature = "tokio-native-tls",
    feature = "tokio-rustls-manual-roots",
    feature = "tokio-rustls-native-certs",
    feature = "tokio-rustls-webpki-roots",
    feature = "tokio-openssl"
))]
/// 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<ConnectStream>, Response), Error>
where
    R: IntoClientRequest + Unpin,
{
    let request: Request = request.into_client_request()?;

    let domain = domain(&request)?;
    let port = port(&request)?;

    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
}

use std::pin::Pin;
use std::task::{Context, Poll};

pin_project_lite::pin_project! {
    /// Adapter for `tokio::io::AsyncRead` and `tokio::io::AsyncWrite` to provide
    /// the variants from the `futures` crate and the other way around.
    #[derive(Debug, Clone)]
    pub struct TokioAdapter<T> {
        #[pin]
        inner: T,
    }
}

impl<T> TokioAdapter<T> {
    /// Creates a new `TokioAdapter` wrapping the provided value.
    pub fn new(inner: T) -> Self {
        Self { inner }
    }

    /// Consumes this `TokioAdapter`, returning the underlying value.
    pub fn into_inner(self) -> T {
        self.inner
    }

    /// Get a reference to the underlying value.
    pub fn get_ref(&self) -> &T {
        &self.inner
    }

    /// Get a mutable reference to the underlying value.
    pub fn get_mut(&mut self) -> &mut T {
        &mut self.inner
    }
}

impl<T: tokio::io::AsyncRead> AsyncRead for TokioAdapter<T> {
    fn poll_read(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &mut [u8],
    ) -> Poll<std::io::Result<usize>> {
        let mut buf = tokio::io::ReadBuf::new(buf);
        match self.project().inner.poll_read(cx, &mut buf)? {
            Poll::Pending => Poll::Pending,
            Poll::Ready(_) => Poll::Ready(Ok(buf.filled().len())),
        }
    }
}

impl<T: tokio::io::AsyncWrite> AsyncWrite for TokioAdapter<T> {
    fn poll_write(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &[u8],
    ) -> Poll<Result<usize, std::io::Error>> {
        self.project().inner.poll_write(cx, buf)
    }

    fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), std::io::Error>> {
        self.project().inner.poll_flush(cx)
    }

    fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), std::io::Error>> {
        self.project().inner.poll_shutdown(cx)
    }
}

impl<T: AsyncRead> tokio::io::AsyncRead for TokioAdapter<T> {
    fn poll_read(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &mut tokio::io::ReadBuf<'_>,
    ) -> Poll<std::io::Result<()>> {
        let slice = buf.initialize_unfilled();
        let n = match self.project().inner.poll_read(cx, slice)? {
            Poll::Pending => return Poll::Pending,
            Poll::Ready(n) => n,
        };
        buf.advance(n);
        Poll::Ready(Ok(()))
    }
}

impl<T: AsyncWrite> tokio::io::AsyncWrite for TokioAdapter<T> {
    fn poll_write(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &[u8],
    ) -> Poll<Result<usize, std::io::Error>> {
        self.project().inner.poll_write(cx, buf)
    }

    fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), std::io::Error>> {
        self.project().inner.poll_flush(cx)
    }

    fn poll_shutdown(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
    ) -> Poll<Result<(), std::io::Error>> {
        self.project().inner.poll_close(cx)
    }
}