# last_modified.rs.html -- source
Source to the Rust file `src/header/common/last_modified.rs`.
Keywords: rust, rustlang, rust-lang

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    use header::{HttpDate, LAST_MODIFIED};

    header! {
        /// `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
        ///
        /// ```rust
        /// use actix_web::HttpResponse;
        /// use actix_web::http::header::LastModified;
        /// use std::time::{SystemTime, Duration};
        ///
        /// let mut builder = HttpResponse::Ok();
        /// let modified = SystemTime::now() - Duration::from_secs(60 * 60 * 24);
        /// builder.set(LastModified(modified.into()));
        /// ```
        (LastModified, LAST_MODIFIED) => [HttpDate]

            test_last_modified {
                // Test case from RFC
                test_header!(test1, vec![b"Sat, 29 Oct 1994 19:43:31 GMT"]);}
    }

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