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use std::time::SystemTime; use util::HttpDate; /// `Last-Modified` header, defined in /// [RFC7232](http://tools.ietf.org/html/rfc7232#section-2.2) /// /// The `Last-Modified` header field in a response provides a timestamp /// indicating the date and time at which the origin server believes the /// selected representation was last modified, as determined at the /// conclusion of handling the request. /// /// # ABNF /// /// ```text /// Expires = HTTP-date /// ``` /// /// # Example values /// /// * `Sat, 29 Oct 1994 19:43:31 GMT` /// /// # Example /// /// ``` /// # extern crate headers; /// use headers::LastModified; /// use std::time::{Duration, SystemTime}; /// /// let modified = LastModified::from( /// SystemTime::now() - Duration::from_secs(60 * 60 * 24) /// ); /// ``` #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Header)] pub struct LastModified(pub(super) HttpDate); impl From<SystemTime> for LastModified { fn from(time: SystemTime) -> LastModified { LastModified(time.into()) } } impl From<LastModified> for SystemTime { fn from(date: LastModified) -> SystemTime { date.0.into() } }