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

use mime::Mime;

use header::{QualityItem, qitem};

header! {
    /// `Accept` header, defined in [RFC7231](http://tools.ietf.org/html/rfc7231#section-5.3.2)
    ///
    /// The `Accept` header field can be used by user agents to specify
    /// response media types that are acceptable.  Accept header fields can
    /// be used to indicate that the request is specifically limited to a
    /// small set of desired types, as in the case of a request for an
    /// in-line image
    ///
    /// # ABNF
    /// ```plain
    /// Accept = #( media-range [ accept-params ] )
    ///
    /// media-range    = ( "*/*"
    ///                  / ( type "/" "*" )
    ///                  / ( type "/" subtype )
    ///                  ) *( OWS ";" OWS parameter )
    /// accept-params  = weight *( accept-ext )
    /// accept-ext = OWS ";" OWS token [ "=" ( token / quoted-string ) ]
    /// ```
    ///
    /// # Example values
    /// * `audio/*; q=0.2, audio/basic` (`*` value won't parse correctly)
    /// * `text/plain; q=0.5, text/html, text/x-dvi; q=0.8, text/x-c`
    ///
    /// # Examples
    /// ```
    /// use hyper::header::{Headers, Accept, qitem};
    /// use hyper::mime::{Mime, TopLevel, SubLevel};
    ///
    /// let mut headers = Headers::new();
    ///
    /// headers.set(
    ///     Accept(vec![
    ///         qitem(Mime(TopLevel::Text, SubLevel::Html, vec![])),
    ///     ])
    /// );
    /// ```
    /// ```
    /// use hyper::header::{Headers, Accept, qitem};
    /// use hyper::mime::{Mime, TopLevel, SubLevel, Attr, Value};
    ///
    /// let mut headers = Headers::new();
    /// headers.set(
    ///     Accept(vec![
    ///         qitem(Mime(TopLevel::Application, SubLevel::Json,
    ///                    vec![(Attr::Charset, Value::Utf8)])),
    ///     ])
    /// );
    /// ```
    /// ```
    /// use hyper::header::{Headers, Accept, QualityItem, Quality, qitem};
    /// use hyper::mime::{Mime, TopLevel, SubLevel};
    ///
    /// let mut headers = Headers::new();
    ///
    /// headers.set(
    ///     Accept(vec![
    ///         qitem(Mime(TopLevel::Text, SubLevel::Html, vec![])),
    ///         qitem(Mime(TopLevel::Application,
    ///                    SubLevel::Ext("xhtml+xml".to_owned()), vec![])),
    ///         QualityItem::new(Mime(TopLevel::Application, SubLevel::Xml, vec![]),
    ///                          Quality(900)),
    ///                          qitem(Mime(TopLevel::Image,
    ///                                     SubLevel::Ext("webp".to_owned()), vec![])),
    ///                          QualityItem::new(Mime(TopLevel::Star, SubLevel::Star, vec![]),
    ///                                           Quality(800))
    ///     ])
    /// );
    /// ```
    ///
    /// # Notes
    /// * Using always Mime types to represent `media-range` differs from the ABNF.
    /// * **FIXME**: `accept-ext` is not supported.
    (Accept, "Accept") => (QualityItem<Mime>)+

    test_accept {
        // Tests from the RFC
        // FIXME: Test fails, first value containing a "*" fails to parse
        // test_header!(
        //    test1,
        //    vec![b"audio/*; q=0.2, audio/basic"],
        //    Some(HeaderField(vec![
        //        QualityItem::new(Mime(TopLevel::Audio, SubLevel::Star, vec![]), Quality(200)),
        //        qitem(Mime(TopLevel::Audio, SubLevel::Ext("basic".to_owned()), vec![])),
        //        ])));
        test_header!(
            test2,
            vec![b"text/plain; q=0.5, text/html, text/x-dvi; q=0.8, text/x-c"],
            Some(HeaderField(vec![
                QualityItem::new(Mime(TopLevel::Text, SubLevel::Plain, vec![]), Quality(500)),
                qitem(Mime(TopLevel::Text, SubLevel::Html, vec![])),
                QualityItem::new(
                    Mime(TopLevel::Text, SubLevel::Ext("x-dvi".to_owned()), vec![]),
                    Quality(800)),
                qitem(Mime(TopLevel::Text, SubLevel::Ext("x-c".to_owned()), vec![])),
                ])));
        // Custom tests
        test_header!(
            test3,
            vec![b"text/plain; charset=utf-8"],
            Some(Accept(vec![
                qitem(Mime(TopLevel::Text, SubLevel::Plain, vec![(Attr::Charset, Value::Utf8)])),
                ])));
        test_header!(
            test4,
            vec![b"text/plain; charset=utf-8; q=0.5"],
            Some(Accept(vec![
                QualityItem::new(Mime(TopLevel::Text,
                    SubLevel::Plain, vec![(Attr::Charset, Value::Utf8)]),
                    Quality(500)),
            ])));
    }
}

impl Accept {
    /// A constructor to easily create `Accept: */*`.
    pub fn star() -> Accept {
        Accept(vec![qitem(mime!(Star/Star))])
    }

    /// A constructor to easily create `Accept: application/json`.
    pub fn json() -> Accept {
        Accept(vec![qitem(mime!(Application/Json))])
    }

    /// A constructor to easily create `Accept: text/*`.
    pub fn text() -> Accept {
        Accept(vec![qitem(mime!(Text/Star))])
    }

    /// A constructor to easily create `Accept: image/*`.
    pub fn image() -> Accept {
        Accept(vec![qitem(mime!(Image/Star))])
    }
}


bench_header!(bench, Accept, { vec![b"text/plain; q=0.5, text/html".to_vec()] });