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
179
180
181
182
183
184
use crate::{
transport::smtp::response::{Code, Severity},
BoxError,
};
use std::{error::Error as StdError, fmt};
pub struct Error {
inner: Box<Inner>,
}
struct Inner {
kind: Kind,
source: Option<BoxError>,
}
impl Error {
pub(crate) fn new<E>(kind: Kind, source: Option<E>) -> Error
where
E: Into<BoxError>,
{
Error {
inner: Box::new(Inner {
kind,
source: source.map(Into::into),
}),
}
}
pub fn is_response(&self) -> bool {
matches!(self.inner.kind, Kind::Response)
}
pub fn is_client(&self) -> bool {
matches!(self.inner.kind, Kind::Client)
}
pub fn is_transient(&self) -> bool {
matches!(self.inner.kind, Kind::Transient(_))
}
pub fn is_permanent(&self) -> bool {
matches!(self.inner.kind, Kind::Permanent(_))
}
pub fn is_timeout(&self) -> bool {
let mut source = self.source();
while let Some(err) = source {
if let Some(io_err) = err.downcast_ref::<std::io::Error>() {
return io_err.kind() == std::io::ErrorKind::TimedOut;
}
source = err.source();
}
false
}
#[cfg(any(feature = "native-tls", feature = "rustls-tls"))]
#[cfg_attr(docsrs, doc(cfg(any(feature = "native-tls", feature = "rustls-tls"))))]
pub fn is_tls(&self) -> bool {
matches!(self.inner.kind, Kind::Tls)
}
pub fn status(&self) -> Option<Code> {
match self.inner.kind {
Kind::Transient(code) | Kind::Permanent(code) => Some(code),
_ => None,
}
}
}
#[derive(Debug)]
pub(crate) enum Kind {
Transient(Code),
Permanent(Code),
Response,
Client,
Connection,
Network,
#[cfg_attr(docsrs, doc(cfg(any(feature = "native-tls", feature = "rustls-tls"))))]
#[cfg(any(feature = "native-tls", feature = "rustls-tls"))]
Tls,
}
impl fmt::Debug for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let mut builder = f.debug_struct("lettre::transport::smtp::Error");
builder.field("kind", &self.inner.kind);
if let Some(ref source) = self.inner.source {
builder.field("source", source);
}
builder.finish()
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self.inner.kind {
Kind::Response => f.write_str("response error")?,
Kind::Client => f.write_str("internal client error")?,
Kind::Network => f.write_str("network error")?,
Kind::Connection => f.write_str("Connection error")?,
#[cfg(any(feature = "native-tls", feature = "rustls-tls"))]
Kind::Tls => f.write_str("tls error")?,
Kind::Transient(ref code) => {
write!(f, "transient error ({})", code)?;
}
Kind::Permanent(ref code) => {
write!(f, "permanent error ({})", code)?;
}
};
if let Some(ref e) = self.inner.source {
write!(f, ": {}", e)?;
}
Ok(())
}
}
impl StdError for Error {
fn source(&self) -> Option<&(dyn StdError + 'static)> {
self.inner.source.as_ref().map(|e| {
let r: &(dyn std::error::Error + 'static) = &**e;
r
})
}
}
pub(crate) fn code(c: Code) -> Error {
match c.severity {
Severity::TransientNegativeCompletion => Error::new::<Error>(Kind::Transient(c), None),
Severity::PermanentNegativeCompletion => Error::new::<Error>(Kind::Permanent(c), None),
_ => client("Unknown error code"),
}
}
pub(crate) fn response<E: Into<BoxError>>(e: E) -> Error {
Error::new(Kind::Response, Some(e))
}
pub(crate) fn client<E: Into<BoxError>>(e: E) -> Error {
Error::new(Kind::Client, Some(e))
}
pub(crate) fn network<E: Into<BoxError>>(e: E) -> Error {
Error::new(Kind::Network, Some(e))
}
pub(crate) fn connection<E: Into<BoxError>>(e: E) -> Error {
Error::new(Kind::Connection, Some(e))
}
#[cfg(any(feature = "native-tls", feature = "rustls-tls"))]
pub(crate) fn tls<E: Into<BoxError>>(e: E) -> Error {
Error::new(Kind::Tls, Some(e))
}