headers-ext 0.0.4

typed HTTP headers
Documentation 
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use util::EntityTag;

/// `ETag` header, defined in [RFC7232](http://tools.ietf.org/html/rfc7232#section-2.3)
///
/// The `ETag` header field in a response provides the current entity-tag
/// for the selected representation, as determined at the conclusion of
/// handling the request.  An entity-tag is an opaque validator for
/// differentiating between multiple representations of the same
/// resource, regardless of whether those multiple representations are
/// due to resource state changes over time, content negotiation
/// resulting in multiple representations being valid at the same time,
/// or both.  An entity-tag consists of an opaque quoted string, possibly
/// prefixed by a weakness indicator.
///
/// # ABNF
///
/// ```text
/// ETag       = entity-tag
/// ```
///
/// # Example values
///
/// * `"xyzzy"`
/// * `W/"xyzzy"`
/// * `""`
///
/// # Examples
///
#[derive(Clone, Debug, PartialEq, Eq, Header)]
#[header(name_const = "ETAG")]
pub struct ETag(pub(super) EntityTag);

    /*
    test_etag {
        // From the RFC
        test_header!(test1,
            vec![b"\"xyzzy\""],
            Some(ETag(EntityTag::new(false, "xyzzy".to_owned()))));
        test_header!(test2,
            vec![b"W/\"xyzzy\""],
            Some(ETag(EntityTag::new(true, "xyzzy".to_owned()))));
        test_header!(test3,
            vec![b"\"\""],
            Some(ETag(EntityTag::new(false, "".to_owned()))));
        // Own tests
        test_header!(test4,
            vec![b"\"foobar\""],
            Some(ETag(EntityTag::new(false, "foobar".to_owned()))));
        test_header!(test5,
            vec![b"\"\""],
            Some(ETag(EntityTag::new(false, "".to_owned()))));
        test_header!(test6,
            vec![b"W/\"weak-etag\""],
            Some(ETag(EntityTag::new(true, "weak-etag".to_owned()))));
        test_header!(test7,
            vec![b"W/\"\x65\x62\""],
            Some(ETag(EntityTag::new(true, "\u{0065}\u{0062}".to_owned()))));
        test_header!(test8,
            vec![b"W/\"\""],
            Some(ETag(EntityTag::new(true, "".to_owned()))));
        test_header!(test9,
            vec![b"no-dquotes"],
            None::<ETag>);
        test_header!(test10,
            vec![b"w/\"the-first-w-is-case-sensitive\""],
            None::<ETag>);
        test_header!(test11,
            vec![b""],
            None::<ETag>);
        test_header!(test12,
            vec![b"\"unmatched-dquotes1"],
            None::<ETag>);
        test_header!(test13,
            vec![b"unmatched-dquotes2\""],
            None::<ETag>);
        test_header!(test14,
            vec![b"matched-\"dquotes\""],
            None::<ETag>);
        test_header!(test15,
            vec![b"\""],
            None::<ETag>);
    }
    */