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

#![allow(dead_code)]

use std::io;
use std::net::Shutdown;
use std::path::Path;
use std::pin::Pin;
use std::task::{Context, Poll};

use sqlx_rt::{AsyncRead, AsyncWrite, TcpStream};

#[derive(Debug)]
pub enum Socket {
    Tcp(TcpStream),

    #[cfg(unix)]
    Unix(sqlx_rt::UnixStream),
}

impl Socket {
    pub async fn connect_tcp(host: &str, port: u16) -> io::Result<Self> {
        TcpStream::connect((host, port)).await.map(Socket::Tcp)
    }

    #[cfg(unix)]
    pub async fn connect_uds(path: impl AsRef<Path>) -> io::Result<Self> {
        sqlx_rt::UnixStream::connect(path.as_ref())
            .await
            .map(Socket::Unix)
    }

    #[cfg(not(unix))]
    pub async fn connect_uds(_: impl AsRef<Path>) -> io::Result<Self> {
        Err(io::Error::new(
            io::ErrorKind::Other,
            "Unix domain sockets are not supported outside Unix platforms.",
        ))
    }

    pub fn shutdown(&self) -> io::Result<()> {
        match self {
            Socket::Tcp(s) => s.shutdown(Shutdown::Both),

            #[cfg(unix)]
            Socket::Unix(s) => s.shutdown(Shutdown::Both),
        }
    }
}

impl AsyncRead for Socket {
    fn poll_read(
        mut self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &mut [u8],
    ) -> Poll<io::Result<usize>> {
        match &mut *self {
            Socket::Tcp(s) => Pin::new(s).poll_read(cx, buf),

            #[cfg(unix)]
            Socket::Unix(s) => Pin::new(s).poll_read(cx, buf),
        }
    }

    #[cfg(any(feature = "_rt-actix", feature = "_rt-tokio"))]
    fn poll_read_buf<B>(
        mut self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &mut B,
    ) -> Poll<io::Result<usize>>
    where
        Self: Sized,
        B: bytes::BufMut,
    {
        match &mut *self {
            Socket::Tcp(s) => Pin::new(s).poll_read_buf(cx, buf),

            #[cfg(unix)]
            Socket::Unix(s) => Pin::new(s).poll_read_buf(cx, buf),
        }
    }
}

impl AsyncWrite for Socket {
    fn poll_write(
        mut self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &[u8],
    ) -> Poll<io::Result<usize>> {
        match &mut *self {
            Socket::Tcp(s) => Pin::new(s).poll_write(cx, buf),

            #[cfg(unix)]
            Socket::Unix(s) => Pin::new(s).poll_write(cx, buf),
        }
    }

    fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
        match &mut *self {
            Socket::Tcp(s) => Pin::new(s).poll_flush(cx),

            #[cfg(unix)]
            Socket::Unix(s) => Pin::new(s).poll_flush(cx),
        }
    }

    #[cfg(any(feature = "_rt-actix", feature = "_rt-tokio"))]
    fn poll_shutdown(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
        match &mut *self {
            Socket::Tcp(s) => Pin::new(s).poll_shutdown(cx),

            #[cfg(unix)]
            Socket::Unix(s) => Pin::new(s).poll_shutdown(cx),
        }
    }

    #[cfg(feature = "_rt-async-std")]
    fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
        match &mut *self {
            Socket::Tcp(s) => Pin::new(s).poll_close(cx),

            #[cfg(unix)]
            Socket::Unix(s) => Pin::new(s).poll_close(cx),
        }
    }

    #[cfg(any(feature = "_rt-actix", feature = "_rt-tokio"))]
    fn poll_write_buf<B>(
        mut self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &mut B,
    ) -> Poll<io::Result<usize>>
    where
        Self: Sized,
        B: bytes::Buf,
    {
        match &mut *self {
            Socket::Tcp(s) => Pin::new(s).poll_write_buf(cx, buf),

            #[cfg(unix)]
            Socket::Unix(s) => Pin::new(s).poll_write_buf(cx, buf),
        }
    }
}