Files
adler32
aho_corasick
alga
approx
ascii
atty
backtrace
backtrace_sys
base64
bitflags
blas_src
block_buffer
block_padding
brotli2
brotli_sys
buf_redux
byte_tools
byteorder
cauchy
cblas_sys
cfg_if
chrono
chunked_transfer
colored
crc32fast
crossbeam
crossbeam_channel
crossbeam_deque
crossbeam_epoch
crossbeam_queue
crossbeam_utils
ctrlc
deflate
digest
dirs
error_chain
filetime
futures
generic_array
getrandom
gzip_header
hex
httparse
hyper
idna
itoa
language_tags
lapack_src
lapacke
lapacke_sys
lazy_static
libc
libm
linked_hash_map
log
matches
matrixmultiply
maybe_uninit
md5
memchr
memoffset
mime
mime_guess
multipart
nalgebra
base
geometry
linalg
ndarray
ndarray_linalg
net2
netlib_src
nix
num_complex
num_cpus
num_integer
num_rational
num_traits
opaque_debug
percent_encoding
phf
phf_shared
ppv_lite86
proc_macro2
quick_error
quote
rand
rand_chacha
rand_core
rand_distr
rawpointer
regex
regex_syntax
remove_dir_all
rosrust
rosrust_codegen
rosrust_msg
rouille
rustc_demangle
rustros_tf
ryu
safemem
scopeguard
serde
serde_bytes
serde_derive
serde_json
serde_xml_rs
sha1
siphasher
smallvec
syn
tempdir
term
thread_local
threadpool
time
tiny_http
traitobject
twoway
typeable
typenum
ucd_util
unicase
unicode_bidi
unicode_normalization
unicode_xid
url
utf8_ranges
void
xml
xml_rpc
yaml_rust
  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
use std::fmt;
use header::{Header, HeaderFormat, Preference};
use header::parsing::{from_comma_delimited, fmt_comma_delimited};

/// `Preference-Applied` header, defined in [RFC7240](http://tools.ietf.org/html/rfc7240)
///
/// The `Preference-Applied` response header may be included within a
/// response message as an indication as to which `Prefer` header tokens were
/// honored by the server and applied to the processing of a request.
///
/// # ABNF
/// ```plain
/// Preference-Applied = "Preference-Applied" ":" 1#applied-pref
/// applied-pref = token [ BWS "=" BWS word ]
/// ```
///
/// # Example values
/// * `respond-async`
/// * `return=minimal`
/// * `wait=30`
///
/// # Examples
/// ```
/// use hyper::header::{Headers, PreferenceApplied, Preference};
///
/// let mut headers = Headers::new();
/// headers.set(
///     PreferenceApplied(vec![Preference::RespondAsync])
/// );
/// ```
/// ```
/// use hyper::header::{Headers, PreferenceApplied, Preference};
///
/// let mut headers = Headers::new();
/// headers.set(
///     PreferenceApplied(vec![
///         Preference::RespondAsync,
///         Preference::ReturnRepresentation,
///         Preference::Wait(10u32),
///         Preference::Extension("foo".to_owned(),
///                               "bar".to_owned(),
///                               vec![]),
///     ])
/// );
/// ```
#[derive(PartialEq, Clone, Debug)]
pub struct PreferenceApplied(pub Vec<Preference>);

__hyper__deref!(PreferenceApplied => Vec<Preference>);

impl Header for PreferenceApplied {
    fn header_name() -> &'static str {
        "Preference-Applied"
    }

    fn parse_header(raw: &[Vec<u8>]) -> ::Result<PreferenceApplied> {
        let preferences = try!(from_comma_delimited(raw));
        if !preferences.is_empty() {
            Ok(PreferenceApplied(preferences))
        } else {
            Err(::Error::Header)
        }
    }
}

impl HeaderFormat for PreferenceApplied {
    fn fmt_header(&self, f: &mut fmt::Formatter) -> fmt::Result {
        fmt::Display::fmt(self, f)
    }
}

impl fmt::Display for PreferenceApplied {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        //TODO: format this without allocating a Vec and cloning contents
        let preferences: Vec<_> = self.0.iter().map(|pref| match pref {
            // The spec ignores parameters in `Preferences-Applied`
            &Preference::Extension(ref name, ref value, _) => Preference::Extension(
              name.to_owned(),
              value.to_owned(),
              vec![]
            ),
            preference @ _ => preference.clone()
        }).collect();
        fmt_comma_delimited(f, &preferences)
    }
}

#[cfg(test)]
mod tests {
    use header::{HeaderFormat, Preference};
    use super::*;

    #[test]
    fn test_format_ignore_parameters() {
        assert_eq!(
            format!("{}", &PreferenceApplied(vec![Preference::Extension(
                "foo".to_owned(),
                "bar".to_owned(),
                vec![("bar".to_owned(), "foo".to_owned()), ("buz".to_owned(), "".to_owned())]
            )]) as &(HeaderFormat + Send + Sync)),
            "foo=bar".to_owned()
        );
    }
}

bench_header!(normal,
    PreferenceApplied, { vec![b"respond-async, return=representation".to_vec(), b"wait=100".to_vec()] });