lettre/message/header/
textual.rs

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
use super::{Header, HeaderName, HeaderValue};
use crate::BoxError;

macro_rules! text_header {
    ($(#[$attr:meta])* Header($type_name: ident, $header_name: expr )) => {
        $(#[$attr])*
        #[derive(Debug, Clone, PartialEq, Eq)]
        pub struct $type_name(String);

        impl Header for $type_name {
            fn name() -> HeaderName {
                HeaderName::new_from_ascii_str($header_name)
            }

            fn parse(s: &str) -> Result<Self, BoxError> {
                Ok(Self(s.into()))
            }

            fn display(&self) -> HeaderValue {
             HeaderValue::new(Self::name(),   self.0.clone())
            }
        }

        impl From<String> for $type_name {
            #[inline]
            fn from(text: String) -> Self {
                Self(text)
            }
        }

        impl AsRef<str> for $type_name {
            #[inline]
            fn as_ref(&self) -> &str {
                &self.0
            }
        }
    };
}

text_header!(
    /// `Subject` of the message, defined in [RFC5322](https://tools.ietf.org/html/rfc5322#section-3.6.5)
    Header(Subject, "Subject")
);
text_header!(
    /// `Comments` of the message, defined in [RFC5322](https://tools.ietf.org/html/rfc5322#section-3.6.5)
    Header(Comments, "Comments")
);
text_header!(
    /// `Keywords` header. Should contain a comma-separated list of one or more
    /// words or quoted-strings, defined in [RFC5322](https://tools.ietf.org/html/rfc5322#section-3.6.5)
    Header(Keywords, "Keywords")
);
text_header!(
    /// `In-Reply-To` header. Contains one or more
    /// unique message identifiers,
    /// defined in [RFC5322](https://tools.ietf.org/html/rfc5322#section-3.6.4)
    Header(InReplyTo, "In-Reply-To")
);
text_header!(
    /// `References` header. Contains one or more
    /// unique message identifiers,
    /// defined in [RFC5322](https://tools.ietf.org/html/rfc5322#section-3.6.4)
    Header(References, "References")
);
text_header!(
    /// `Message-Id` header. Contains a unique message identifier,
    /// defined in [RFC5322](https://tools.ietf.org/html/rfc5322#section-3.6.4)
    Header(MessageId, "Message-ID")
);
text_header!(
    /// `User-Agent` header. Contains information about the client,
    /// defined in [draft-melnikov-email-user-agent-00](https://tools.ietf.org/html/draft-melnikov-email-user-agent-00#section-3)
    Header(UserAgent, "User-Agent")
);
text_header! {
    /// `Content-Id` header,
    /// defined in [RFC2045](https://tools.ietf.org/html/rfc2045#section-7)
    Header(ContentId, "Content-ID")
}
text_header! {
    /// `Content-Location` header,
    /// defined in [RFC2110](https://tools.ietf.org/html/rfc2110#section-4.3)
    Header(ContentLocation, "Content-Location")
}

#[cfg(test)]
mod test {
    use pretty_assertions::assert_eq;

    use super::Subject;
    use crate::message::header::{HeaderName, HeaderValue, Headers};

    #[test]
    fn format_ascii() {
        let mut headers = Headers::new();
        headers.set(Subject("Sample subject".into()));

        assert_eq!(headers.to_string(), "Subject: Sample subject\r\n");
    }

    #[test]
    fn format_utf8() {
        let mut headers = Headers::new();
        headers.set(Subject("Тема сообщения".into()));

        assert_eq!(
            headers.to_string(),
            "Subject: =?utf-8?b?0KLQtdC80LAg0YHQvtC+0LHRidC10L3QuNGP?=\r\n"
        );
    }

    #[test]
    fn format_utf8_word() {
        let mut headers = Headers::new();
        headers.set(Subject("Administratör".into()));

        assert_eq!(
            headers.to_string(),
            "Subject: =?utf-8?b?QWRtaW5pc3RyYXTDtnI=?=\r\n"
        );
    }

    #[test]
    fn parse_ascii() {
        let mut headers = Headers::new();
        headers.insert_raw(HeaderValue::new(
            HeaderName::new_from_ascii_str("Subject"),
            "Sample subject".to_owned(),
        ));

        assert_eq!(
            headers.get::<Subject>(),
            Some(Subject("Sample subject".into()))
        );
    }
}