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
|
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use bytes::Buf;
use bytes::Bytes;
use deno_net::raw::NetworkStream;
use h2::RecvStream;
use h2::SendStream;
use hyper::upgrade::Upgraded;
use hyper_util::rt::TokioIo;
use std::io::ErrorKind;
use std::pin::Pin;
use std::task::ready;
use std::task::Poll;
use tokio::io::AsyncRead;
use tokio::io::AsyncWrite;
use tokio::io::ReadBuf;
// TODO(bartlomieju): remove this
pub(crate) enum WsStreamKind {
Upgraded(TokioIo<Upgraded>),
Network(NetworkStream),
H2(SendStream<Bytes>, RecvStream),
}
pub(crate) struct WebSocketStream {
stream: WsStreamKind,
pre: Option<Bytes>,
}
impl WebSocketStream {
pub fn new(stream: WsStreamKind, buffer: Option<Bytes>) -> Self {
Self {
stream,
pre: buffer,
}
}
}
impl AsyncRead for WebSocketStream {
// From hyper's Rewind (https://github.com/hyperium/hyper), MIT License, Copyright (c) Sean McArthur
fn poll_read(
mut self: Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
buf: &mut ReadBuf<'_>,
) -> Poll<std::io::Result<()>> {
if let Some(mut prefix) = self.pre.take() {
// If there are no remaining bytes, let the bytes get dropped.
if !prefix.is_empty() {
let copy_len = std::cmp::min(prefix.len(), buf.remaining());
// TODO: There should be a way to do following two lines cleaner...
buf.put_slice(&prefix[..copy_len]);
prefix.advance(copy_len);
// Put back what's left
if !prefix.is_empty() {
self.pre = Some(prefix);
}
return Poll::Ready(Ok(()));
}
}
match &mut self.stream {
WsStreamKind::Network(stream) => Pin::new(stream).poll_read(cx, buf),
WsStreamKind::Upgraded(stream) => Pin::new(stream).poll_read(cx, buf),
WsStreamKind::H2(_, recv) => {
let data = ready!(recv.poll_data(cx));
let Some(data) = data else {
// EOF
return Poll::Ready(Ok(()));
};
let mut data = data.map_err(|e| {
std::io::Error::new(std::io::ErrorKind::InvalidData, e)
})?;
recv.flow_control().release_capacity(data.len()).unwrap();
// This looks like the prefix code above -- can we share this?
let copy_len = std::cmp::min(data.len(), buf.remaining());
// TODO: There should be a way to do following two lines cleaner...
buf.put_slice(&data[..copy_len]);
data.advance(copy_len);
// Put back what's left
if !data.is_empty() {
self.pre = Some(data);
}
Poll::Ready(Ok(()))
}
}
}
}
impl AsyncWrite for WebSocketStream {
fn poll_write(
mut self: Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
buf: &[u8],
) -> std::task::Poll<Result<usize, std::io::Error>> {
match &mut self.stream {
WsStreamKind::Network(stream) => Pin::new(stream).poll_write(cx, buf),
WsStreamKind::Upgraded(stream) => Pin::new(stream).poll_write(cx, buf),
WsStreamKind::H2(send, _) => {
// Zero-length write succeeds
if buf.is_empty() {
return Poll::Ready(Ok(0));
}
send.reserve_capacity(buf.len());
let res = ready!(send.poll_capacity(cx));
// TODO(mmastrac): the documentation is not entirely clear what to do here, so we'll continue
_ = res;
// We'll try to send whatever we have capacity for
let size = std::cmp::min(buf.len(), send.capacity());
assert!(size > 0);
let buf: Bytes = Bytes::copy_from_slice(&buf[0..size]);
let len = buf.len();
// TODO(mmastrac): surface the h2 error?
let res = send
.send_data(buf, false)
.map_err(|_| std::io::Error::from(ErrorKind::Other));
Poll::Ready(res.map(|_| len))
}
}
}
fn poll_flush(
mut self: Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
) -> std::task::Poll<Result<(), std::io::Error>> {
match &mut self.stream {
WsStreamKind::Network(stream) => Pin::new(stream).poll_flush(cx),
WsStreamKind::Upgraded(stream) => Pin::new(stream).poll_flush(cx),
WsStreamKind::H2(..) => Poll::Ready(Ok(())),
}
}
fn poll_shutdown(
mut self: Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
) -> std::task::Poll<Result<(), std::io::Error>> {
match &mut self.stream {
WsStreamKind::Network(stream) => Pin::new(stream).poll_shutdown(cx),
WsStreamKind::Upgraded(stream) => Pin::new(stream).poll_shutdown(cx),
WsStreamKind::H2(send, _) => {
// TODO(mmastrac): surface the h2 error?
let res = send
.send_data(Bytes::new(), false)
.map_err(|_| std::io::Error::from(ErrorKind::Other));
Poll::Ready(res)
}
}
}
fn is_write_vectored(&self) -> bool {
match &self.stream {
WsStreamKind::Network(stream) => stream.is_write_vectored(),
WsStreamKind::Upgraded(stream) => stream.is_write_vectored(),
WsStreamKind::H2(..) => false,
}
}
fn poll_write_vectored(
mut self: Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
bufs: &[std::io::IoSlice<'_>],
) -> std::task::Poll<Result<usize, std::io::Error>> {
match &mut self.stream {
WsStreamKind::Network(stream) => {
Pin::new(stream).poll_write_vectored(cx, bufs)
}
WsStreamKind::Upgraded(stream) => {
Pin::new(stream).poll_write_vectored(cx, bufs)
}
WsStreamKind::H2(..) => {
// TODO(mmastrac): this is possibly just too difficult, but we'll never call it
unimplemented!()
}
}
}
}
|
