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
|
//
// Error generator macro
//
use std::error::Error as StdError;
macro_rules! make_error {
( $( $name:ident ( $ty:ty ): $src_fn:expr, $usr_msg_fun:expr ),+ $(,)* ) => {
#[derive(Display)]
enum ErrorKind { $($name( $ty )),+ }
pub struct Error { message: String, error: ErrorKind }
$(impl From<$ty> for Error {
fn from(err: $ty) -> Self { Error::from((stringify!($name), err)) }
})+
$(impl<S: Into<String>> From<(S, $ty)> for Error {
fn from(val: (S, $ty)) -> Self {
Error { message: val.0.into(), error: ErrorKind::$name(val.1) }
}
})+
impl StdError for Error {
fn source(&self) -> Option<&(dyn StdError + 'static)> {
match &self.error {$( ErrorKind::$name(e) => $src_fn(e), )+}
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match &self.error {$(
ErrorKind::$name(e) => f.write_str(&$usr_msg_fun(e, &self.message)),
)+}
}
}
};
}
use diesel::result::Error as DieselError;
use jsonwebtoken::errors::Error as JwtError;
use serde_json::{Error as SerError, Value};
use std::io::Error as IOError;
use u2f::u2ferror::U2fError as U2fErr;
// Error struct
// Contains a String error message, meant for the user and an enum variant, with an error of different types.
//
// After the variant itself, there are two expressions. The first one indicates whether the error contains a source error (that we pretty print).
// The second one contains the function used to obtain the response sent to the client
make_error! {
// Used to represent err! calls
SimpleError(String): _no_source, _api_error,
// Used for special return values, like 2FA errors
JsonError(Value): _no_source, _serialize,
DbError(DieselError): _has_source, _api_error,
U2fError(U2fErr): _has_source, _api_error,
SerdeError(SerError): _has_source, _api_error,
JWTError(JwtError): _has_source, _api_error,
IoErrror(IOError): _has_source, _api_error,
//WsError(ws::Error): _has_source, _api_error,
}
impl std::fmt::Debug for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self.source() {
Some(e) => write!(f, "{}.\n[CAUSE] {:#?}", self.message, e),
None => write!(f, "{}. {}", self.message, self.error),
}
}
}
impl Error {
pub fn new<M: Into<String>, N: Into<String>>(usr_msg: M, log_msg: N) -> Self {
(usr_msg, log_msg.into()).into()
}
pub fn with_msg<M: Into<String>>(mut self, msg: M) -> Self {
self.message = msg.into();
self
}
}
pub trait MapResult<S, E> {
fn map_res(self, msg: &str) -> Result<S, E>;
}
impl<S, E: Into<Error>> MapResult<S, Error> for Result<S, E> {
fn map_res(self, msg: &str) -> Result<S, Error> {
self.map_err(|e| e.into().with_msg(msg))
}
}
impl<E: Into<Error>> MapResult<(), Error> for Result<usize, E> {
fn map_res(self, msg: &str) -> Result<(), Error> {
self.and(Ok(())).map_res(msg)
}
}
fn _has_source<T>(e: T) -> Option<T> {
Some(e)
}
fn _no_source<T, S>(_: T) -> Option<S> {
None
}
fn _serialize(e: &impl serde::Serialize, _msg: &str) -> String {
serde_json::to_string(e).unwrap()
}
fn _api_error(_: &impl std::any::Any, msg: &str) -> String {
let json = json!({
"Message": "",
"error": "",
"error_description": "",
"ValidationErrors": {"": [ msg ]},
"ErrorModel": {
"Message": msg,
"Object": "error"
},
"Object": "error"
});
_serialize(&json, "")
}
//
// Rocket responder impl
//
use std::io::Cursor;
use rocket::http::{ContentType, Status};
use rocket::request::Request;
use rocket::response::{self, Responder, Response};
impl<'r> Responder<'r> for Error {
fn respond_to(self, _: &Request) -> response::Result<'r> {
let usr_msg = format!("{}", self);
error!("{:#?}", self);
Response::build()
.status(Status::BadRequest)
.header(ContentType::JSON)
.sized_body(Cursor::new(usr_msg))
.ok()
}
}
//
// Error return macros
//
#[macro_export]
macro_rules! err {
($msg:expr) => {{
return Err(crate::error::Error::new($msg, $msg));
}};
($usr_msg:expr, $log_value:expr) => {{
return Err(crate::error::Error::new($usr_msg, $log_value));
}};
}
#[macro_export]
macro_rules! err_json {
($expr:expr) => {{
return Err(crate::error::Error::from($expr));
}};
}
#[macro_export]
macro_rules! err_handler {
($expr:expr) => {{
return rocket::Outcome::Failure((rocket::http::Status::Unauthorized, $expr));
}};
}
|
