headers/util/
mod.rs

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1use HeaderValue;
2
3//pub use self::charset::Charset;
4//pub use self::encoding::Encoding;
5pub(crate) use self::entity::{EntityTag, EntityTagRange};
6pub(crate) use self::flat_csv::{FlatCsv, SemiColon};
7pub(crate) use self::fmt::fmt;
8pub(crate) use self::http_date::HttpDate;
9pub(crate) use self::iter::IterExt;
10//pub use language_tags::LanguageTag;
11//pub use self::quality_value::{Quality, QualityValue};
12pub(crate) use self::seconds::Seconds;
13pub(crate) use self::value_string::HeaderValueString;
14
15//mod charset;
16pub(crate) mod csv;
17//mod encoding;
18mod entity;
19mod flat_csv;
20mod fmt;
21mod http_date;
22mod iter;
23//mod quality_value;
24mod seconds;
25mod value_string;
26
27macro_rules! error_type {
28    ($name:ident) => {
29        #[doc(hidden)]
30        pub struct $name {
31            _inner: (),
32        }
33
34        impl ::std::fmt::Debug for $name {
35            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
36                f.debug_struct(stringify!($name)).finish()
37            }
38        }
39
40        impl ::std::fmt::Display for $name {
41            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
42                f.write_str(stringify!($name))
43            }
44        }
45
46        impl ::std::error::Error for $name {}
47    };
48}
49
50macro_rules! derive_header {
51    ($type:ident(_), name: $name:ident) => {
52        impl crate::Header for $type {
53            fn name() -> &'static ::http::header::HeaderName {
54                &::http::header::$name
55            }
56
57            fn decode<'i, I>(values: &mut I) -> Result<Self, ::Error>
58            where
59                I: Iterator<Item = &'i ::http::header::HeaderValue>,
60            {
61                ::util::TryFromValues::try_from_values(values).map($type)
62            }
63
64            fn encode<E: Extend<::HeaderValue>>(&self, values: &mut E) {
65                values.extend(::std::iter::once((&self.0).into()));
66            }
67        }
68    };
69}
70
71/// A helper trait for use when deriving `Header`.
72pub(crate) trait TryFromValues: Sized {
73    /// Try to convert from the values into an instance of `Self`.
74    fn try_from_values<'i, I>(values: &mut I) -> Result<Self, ::Error>
75    where
76        Self: Sized,
77        I: Iterator<Item = &'i HeaderValue>;
78}
79
80impl TryFromValues for HeaderValue {
81    fn try_from_values<'i, I>(values: &mut I) -> Result<Self, ::Error>
82    where
83        I: Iterator<Item = &'i HeaderValue>,
84    {
85        values.next().cloned().ok_or_else(|| ::Error::invalid())
86    }
87}
headers/util/mod.rs

headers/util/
mod.rs
