mail-headers 0.6.2

[mail/headers] header parts for the mail crate (inkl. header map and standard header impl)
Documentation 
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



pub mod text_partition;


#[cfg(feature="serde")]
pub mod serde {
    use serde::{
        Serialize, Deserialize,
        ser::{Serializer},
        de::{Deserializer}
    };

    use chrono::{DateTime, Utc};

    pub mod date_time {
        use super::*;
        use serde::de::Error;

        pub fn serialize<S>(dt: &DateTime<Utc>, serializer: S)
            -> Result<S::Ok, S::Error>
            where S: Serializer
        {
            serializer.serialize_str(&dt.to_rfc2822())
        }

        pub fn deserialize<'de, D>(deserializer: D)
            -> Result<DateTime<Utc>, D::Error>
            where D: Deserializer<'de>
        {
            let as_string = String::deserialize(deserializer)?;
            let date_time = DateTime::parse_from_rfc2822(&as_string)
                .map_err(|e| D::Error::custom(format!(
                    "invalid rfc2822 date time: {}", e
                )))?;

            Ok(date_time.with_timezone(&Utc))
        }
    }

    pub mod opt_date_time {
        use super::*;

        pub fn serialize<S>(
            dt: &Option<DateTime<Utc>>,
            serializer: S
        ) -> Result<S::Ok, S::Error>
            where S: Serializer
        {
            SerOptDateTime::from(dt).serialize(serializer)
        }

        pub fn deserialize<'de, D>(deserializer: D)
            -> Result<Option<DateTime<Utc>>, D::Error>
            where D: Deserializer<'de>
        {
            DeOptDateTime::deserialize(deserializer).map(Into::into)
        }

        #[derive(Deserialize)]
        enum DeOptDateTime {
            Some(#[serde(with="super::date_time")] DateTime<Utc>),
            None
        }

        impl Into<Option<DateTime<Utc>>> for DeOptDateTime {
            fn into(self) -> Option<DateTime<Utc>> {
                match self {
                    DeOptDateTime::Some(dt) => Some(dt),
                    DeOptDateTime::None => None
                }
            }
        }

        #[derive(Serialize)]
        enum SerOptDateTime<'a> {
            Some(#[serde(with="super::date_time")] &'a DateTime<Utc>),
            None
        }

        impl<'a> From<&'a Option<DateTime<Utc>>> for SerOptDateTime<'a> {
            fn from(val: &'a Option<DateTime<Utc>>) -> Self {
                match val {
                    Some(ref dt) => SerOptDateTime::Some(dt),
                    None => SerOptDateTime::None
                }
            }
        }
    }
}