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use std::fmt;
use std::str::FromStr;
use crate::util::HeaderValueString;
/// `Referer` header, defined in
/// [RFC7231](https://datatracker.ietf.org/doc/html/rfc7231#section-5.5.2)
///
/// The `Referer` \[sic\] header field allows the user agent to specify a
/// URI reference for the resource from which the target URI was obtained
/// (i.e., the "referrer", though the field name is misspelled). A user
/// agent MUST NOT include the fragment and userinfo components of the
/// URI reference, if any, when generating the Referer field value.
///
/// ## ABNF
///
/// ```text
/// Referer = absolute-URI / partial-URI
/// ```
///
/// ## Example values
///
/// * `http://www.example.org/hypertext/Overview.html`
///
/// # Examples
///
/// ```
/// use headers::Referer;
///
/// let r = Referer::from_static("/People.html#tim");
/// ```
#[derive(Debug, Clone, PartialEq)]
pub struct Referer(HeaderValueString);
derive_header! {
Referer(_),
name: REFERER
}
impl Referer {
/// Create a `Referer` with a static string.
///
/// # Panic
///
/// Panics if the string is not a legal header value.
pub const fn from_static(s: &'static str) -> Referer {
Referer(HeaderValueString::from_static(s))
}
}
error_type!(InvalidReferer);
impl FromStr for Referer {
type Err = InvalidReferer;
fn from_str(src: &str) -> Result<Self, Self::Err> {
HeaderValueString::from_str(src)
.map(Referer)
.map_err(|_| InvalidReferer { _inner: () })
}
}
impl fmt::Display for Referer {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(&self.0, f)
}
}