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

use std::error::Error as StdError;
use std::fmt;
use std::io;
use tokio::task::JoinError;

pub type Result<T> = std::result::Result<T, Error>;

#[derive(Debug)]
pub enum Error {
    Http(hyper::Error),
    Io(io::Error),
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        if let Some(cause) = self.cause() {
            write!(f, "{}: {}", self.description(), cause)
        } else {
            f.write_str(self.description())
        }
    }
}

impl StdError for Error {
    fn description(&self) -> &str {
        match self {
            Error::Http(_) => "HTTP handshake error",
            Error::Io(_) => "IO error",
        }
    }

    fn cause(&self) -> Option<&dyn StdError> {
        match self {
            Error::Http(http) => Some(http),
            Error::Io(io) => Some(io),
        }
    }
}

impl From<hyper::Error> for Error {
    fn from(err: hyper::Error) -> Self {
        Error::Http(err)
    }
}

impl From<io::Error> for Error {
    fn from(err: io::Error) -> Self {
        Error::Io(err)
    }
}

impl From<JoinError> for Error {
    fn from(err: JoinError) -> Self {
        Self::from(io::Error::from(err))
    }
}