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
use super::{HttpDate, IF_UNMODIFIED_SINCE};
crate::http::header::common_header! {
/// `If-Unmodified-Since` header, defined
/// in [RFC 7232 ยง3.4](https://datatracker.ietf.org/doc/html/rfc7232#section-3.4)
///
/// The `If-Unmodified-Since` header field makes the request method
/// conditional on the selected representation's last modification date
/// being earlier than or equal to the date provided in the field-value.
/// This field accomplishes the same purpose as If-Match for cases where
/// the user agent does not have an entity-tag for the representation.
///
/// # Note
/// This is a request header used for conditional requests. Servers should not send
/// `If-Unmodified-Since` in responses; use [`LastModified`](super::LastModified) / the
/// `Last-Modified` header instead.
///
/// # ABNF
/// ```plain
/// If-Unmodified-Since = HTTP-date
/// ```
///
/// # Example Values
/// * `Sat, 29 Oct 1994 19:43:31 GMT`
///
/// # Examples
///
/// ```
/// use std::time::{SystemTime, Duration};
/// use actix_web::{http::header::IfUnmodifiedSince, test};
///
/// let modified = SystemTime::now() - Duration::from_secs(60 * 60 * 24);
/// let req = test::TestRequest::default()
/// .insert_header(IfUnmodifiedSince(modified.into()))
/// .to_http_request();
/// # let _ = req;
/// ```
(IfUnmodifiedSince, IF_UNMODIFIED_SINCE) => [HttpDate]
test_parse_and_format {
// Test case from RFC
crate::http::header::common_header_test!(test1, [b"Sat, 29 Oct 1994 19:43:31 GMT"]);
}
}