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use std::time::Duration;
use util::Seconds;
///
/// The "Age" header field conveys the sender's estimate of the amount of
/// time since the response was generated or successfully validated at
/// the origin server. Age values are calculated as specified in
///
/// ## ABNF
///
/// ```text
/// Age = delta-seconds
/// ```
///
/// The Age field-value is a non-negative integer, representing time in
///
/// The presence of an Age header field implies that the response was not
/// generated or validated by the origin server for this request.
/// However, lack of an Age header field does not imply the origin was
/// contacted, since the response might have been received from an
/// HTTP/1.0 cache that does not implement Age.
///
/// ## Example values
///
/// * `3600`
///
/// # Example
///
/// ```
/// # extern crate headers;
/// use headers::Age;
///
/// let len = Age::from_secs(60);
/// ```
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct Age(Seconds);
derive_header! {
Age(_),
name: AGE
}
impl Age {
/// Creates a new `Age` header from the specified number of whole seconds.
pub fn from_secs(secs: u64) -> Self {
Self(Seconds::from_secs(secs))
}
/// Returns the number of seconds for this `Age` header.
pub fn as_secs(&self) -> u64 {
self.0.as_u64()
}
}
impl From<Duration> for Age {
fn from(dur: Duration) -> Self {
Age(Seconds::from(dur))
}
}
impl From<Age> for Duration {
fn from(age: Age) -> Self {
age.0.into()
}
}