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

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

use hyper::client::connect::{Connected, Connection};
use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
pub use tokio_native_tls::TlsStream;

/// A stream that might be protected with TLS.
pub enum MaybeHttpsStream<T> {
    /// A stream over plain text.
    Http(T),
    /// A stream protected with TLS.
    Https(TlsStream<T>),
}

// ===== impl MaybeHttpsStream =====

impl<T: fmt::Debug> fmt::Debug for MaybeHttpsStream<T> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            MaybeHttpsStream::Http(s) => f.debug_tuple("Http").field(s).finish(),
            MaybeHttpsStream::Https(s) => f.debug_tuple("Https").field(s).finish(),
        }
    }
}

impl<T> From<T> for MaybeHttpsStream<T> {
    fn from(inner: T) -> Self {
        MaybeHttpsStream::Http(inner)
    }
}

impl<T> From<TlsStream<T>> for MaybeHttpsStream<T> {
    fn from(inner: TlsStream<T>) -> Self {
        MaybeHttpsStream::Https(inner)
    }
}

impl<T: AsyncRead + AsyncWrite + Unpin> AsyncRead for MaybeHttpsStream<T> {
    #[inline]
    fn poll_read(
        self: Pin<&mut Self>,
        cx: &mut Context,
        buf: &mut ReadBuf,
    ) -> Poll<Result<(), io::Error>> {
        match Pin::get_mut(self) {
            MaybeHttpsStream::Http(s) => Pin::new(s).poll_read(cx, buf),
            MaybeHttpsStream::Https(s) => Pin::new(s).poll_read(cx, buf),
        }
    }
}

impl<T: AsyncWrite + AsyncRead + Unpin> AsyncWrite for MaybeHttpsStream<T> {
    #[inline]
    fn poll_write(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &[u8],
    ) -> Poll<Result<usize, io::Error>> {
        match Pin::get_mut(self) {
            MaybeHttpsStream::Http(s) => Pin::new(s).poll_write(cx, buf),
            MaybeHttpsStream::Https(s) => Pin::new(s).poll_write(cx, buf),
        }
    }

    fn poll_write_vectored(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        bufs: &[IoSlice<'_>],
    ) -> Poll<Result<usize, io::Error>> {
        match Pin::get_mut(self) {
            MaybeHttpsStream::Http(s) => Pin::new(s).poll_write_vectored(cx, bufs),
            MaybeHttpsStream::Https(s) => Pin::new(s).poll_write_vectored(cx, bufs),
        }
    }

    fn is_write_vectored(&self) -> bool {
        match self {
            MaybeHttpsStream::Http(s) => s.is_write_vectored(),
            MaybeHttpsStream::Https(s) => s.is_write_vectored(),
        }
    }

    #[inline]
    fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
        match Pin::get_mut(self) {
            MaybeHttpsStream::Http(s) => Pin::new(s).poll_flush(cx),
            MaybeHttpsStream::Https(s) => Pin::new(s).poll_flush(cx),
        }
    }

    #[inline]
    fn poll_shutdown(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
        match Pin::get_mut(self) {
            MaybeHttpsStream::Http(s) => Pin::new(s).poll_shutdown(cx),
            MaybeHttpsStream::Https(s) => Pin::new(s).poll_shutdown(cx),
        }
    }
}

impl<T: AsyncRead + AsyncWrite + Connection + Unpin> Connection for MaybeHttpsStream<T> {
    fn connected(&self) -> Connected {
        match self {
            MaybeHttpsStream::Http(s) => s.connected(),
            MaybeHttpsStream::Https(s) => s.get_ref().get_ref().get_ref().connected(),
        }
    }
}