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

// Copyright 2015-2020 Benjamin Fry <benjaminfry@me.com>
//
// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
// http://opensource.org/licenses/MIT>, at your option. This file may not be
// copied, modified, or distributed except according to those terms.

use std::{fmt, io};

use h2;
use thiserror::Error;
use trust_dns_proto::error::ProtoError;
use typed_headers;

use crate::proto::{trace, ExtBacktrace};

/// An alias for results returned by functions of this crate
pub type Result<T> = ::std::result::Result<T, Error>;

#[derive(Debug, Error)]
pub enum ErrorKind {
    /// An error with an arbitrary message, referenced as &'static str
    #[error("{0}")]
    Message(&'static str),

    /// An error with an arbitrary message, stored as String
    #[error("{0}")]
    Msg(String),

    #[error("proto error: {0}")]
    ProtoError(#[from] ProtoError),

    #[error("bad header: {0}")]
    TypedHeaders(#[from] typed_headers::Error),

    #[error("h2: {0}")]
    H2(#[from] h2::Error),
}

/// The error type for errors that get returned in the crate
#[derive(Debug)]
pub struct Error {
    kind: ErrorKind,
    backtrack: Option<ExtBacktrace>,
}

impl Error {
    /// Get the kind of the error
    pub fn kind(&self) -> &ErrorKind {
        &self.kind
    }
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        if let Some(ref backtrace) = self.backtrack {
            fmt::Display::fmt(&self.kind, f)?;
            fmt::Debug::fmt(backtrace, f)
        } else {
            fmt::Display::fmt(&self.kind, f)
        }
    }
}

impl From<ErrorKind> for Error {
    fn from(kind: ErrorKind) -> Error {
        Error {
            kind,
            backtrack: trace!(),
        }
    }
}

impl From<&'static str> for Error {
    fn from(msg: &'static str) -> Error {
        ErrorKind::Message(msg).into()
    }
}

impl From<String> for Error {
    fn from(msg: String) -> Error {
        ErrorKind::Msg(msg).into()
    }
}

impl From<ProtoError> for Error {
    fn from(msg: ProtoError) -> Self {
        ErrorKind::ProtoError(msg).into()
    }
}

impl From<typed_headers::Error> for Error {
    fn from(msg: typed_headers::Error) -> Self {
        ErrorKind::TypedHeaders(msg).into()
    }
}

impl From<h2::Error> for Error {
    fn from(msg: h2::Error) -> Self {
        ErrorKind::H2(msg).into()
    }
}

impl From<Error> for io::Error {
    fn from(err: Error) -> Self {
        io::Error::new(io::ErrorKind::Other, format!("https: {}", err))
    }
}