crev_common/
serde.rs

1// Oh dear, this module is called serde, and is in the root
2// so we have to import serde crate here
3use serde;
4
5use self::serde::Deserialize;
6use chrono::{self, offset::FixedOffset, prelude::*};
7use hex::{self, FromHex, FromHexError};
8use std::{fmt, io};
9
10// {{{ Serde serialization
11pub trait MyTryFromBytes: Sized {
12    type Err: 'static + Sized + ::std::error::Error;
13    fn try_from(_: &[u8]) -> Result<Self, Self::Err>;
14}
15
16pub fn from_base64<'d, T, D>(deserializer: D) -> Result<T, D::Error>
17where
18    D: serde::Deserializer<'d>,
19    T: MyTryFromBytes,
20{
21    use self::serde::de::Error;
22    String::deserialize(deserializer)
23        .and_then(|string| {
24            crate::base64_decode(&string).map_err(|err| Error::custom(err.to_string()))
25        })
26        .and_then(|ref bytes| {
27            <T as MyTryFromBytes>::try_from(bytes)
28                .map_err(|err| Error::custom(format!("{}", &err as &dyn (::std::error::Error))))
29        })
30}
31
32pub fn as_base64<T, S>(key: &T, serializer: S) -> Result<S::Ok, S::Error>
33where
34    T: AsRef<[u8]>,
35    S: serde::Serializer,
36{
37    serializer.serialize_str(&crate::base64_encode(key.as_ref()))
38}
39
40pub fn from_hex<'d, T, D>(deserializer: D) -> Result<T, D::Error>
41where
42    D: serde::Deserializer<'d>,
43    T: MyTryFromBytes,
44{
45    use self::serde::de::Error;
46    String::deserialize(deserializer)
47        .and_then(|string| {
48            FromHex::from_hex(string.as_str())
49                .map_err(|err: FromHexError| Error::custom(err.to_string()))
50        })
51        .and_then(|bytes: Vec<u8>| {
52            <T as MyTryFromBytes>::try_from(&bytes)
53                .map_err(|err| Error::custom(format!("{}", &err as &dyn (::std::error::Error))))
54        })
55}
56
57pub fn as_hex<T, S>(key: &T, serializer: S) -> Result<S::Ok, S::Error>
58where
59    T: AsRef<[u8]>,
60    S: serde::Serializer,
61{
62    serializer.serialize_str(&hex::encode(key))
63}
64
65pub fn from_rfc3339_fixed<'d, D>(deserializer: D) -> Result<chrono::DateTime<FixedOffset>, D::Error>
66where
67    D: serde::Deserializer<'d>,
68{
69    use self::serde::de::Error;
70    String::deserialize(deserializer)
71        .and_then(|string| {
72            DateTime::<FixedOffset>::parse_from_rfc3339(&string)
73                .map_err(|err| Error::custom(err.to_string()))
74        })
75        .map(|dt| dt.with_timezone(&dt.timezone()))
76}
77
78pub fn as_rfc3339_fixed<S>(
79    key: &chrono::DateTime<FixedOffset>,
80    serializer: S,
81) -> Result<S::Ok, S::Error>
82where
83    S: serde::Serializer,
84{
85    serializer.serialize_str(&key.to_rfc3339())
86}
87
88impl MyTryFromBytes for Vec<u8> {
89    type Err = io::Error;
90    fn try_from(slice: &[u8]) -> Result<Self, Self::Err> {
91        Ok(Vec::from(slice))
92    }
93}
94// }}}
95
96/// Write out a value as YAML without a `---` prefix
97///
98/// This is how a lot of stuff in `Crev` is serialized
99pub fn write_as_headerless_yaml<T: self::serde::Serialize>(
100    t: &T,
101    f: &mut dyn fmt::Write,
102) -> fmt::Result {
103    let s = serde_yaml::to_string(t).map_err(|_| fmt::Error)?;
104    f.write_str(&s)
105}
crev_common/serde.rs

crev_common/
serde.rs
