Enum actix_web::http::header::IfNoneMatch
source · pub enum IfNoneMatch {
Any,
Items(Vec<EntityTag>),
}
Expand description
If-None-Match
header, defined
in RFC 7232 §3.2
The If-None-Match
header field makes the request method conditional
on a recipient cache or origin server either not having any current
representation of the target resource, when the field-value is “*”,
or having a selected representation with an entity-tag that does not
match any of those listed in the field-value.
A recipient MUST use the weak comparison function when comparing entity-tags for If-None-Match (Section 2.3.2), since weak entity-tags can be used for cache validation even if there have been changes to the representation data.
§ABNF
If-None-Match = "*" / 1#entity-tag
§Example Values
"xyzzy"
W/"xyzzy"
"xyzzy", "r2d2xxxx", "c3piozzzz"
W/"xyzzy", W/"r2d2xxxx", W/"c3piozzzz"
*
§Examples
use actix_web::HttpResponse;
use actix_web::http::header::IfNoneMatch;
let mut builder = HttpResponse::Ok();
builder.insert_header(IfNoneMatch::Any);
use actix_web::HttpResponse;
use actix_web::http::header::{IfNoneMatch, EntityTag};
let mut builder = HttpResponse::Ok();
builder.insert_header(
IfNoneMatch::Items(vec![
EntityTag::new(false, "xyzzy".to_owned()),
EntityTag::new(false, "foobar".to_owned()),
EntityTag::new(false, "bazquux".to_owned()),
])
);
Variants§
Trait Implementations§
source§impl Clone for IfNoneMatch
impl Clone for IfNoneMatch
source§fn clone(&self) -> IfNoneMatch
fn clone(&self) -> IfNoneMatch
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl Debug for IfNoneMatch
impl Debug for IfNoneMatch
source§impl Display for IfNoneMatch
impl Display for IfNoneMatch
source§impl Header for IfNoneMatch
impl Header for IfNoneMatch
source§fn name() -> HeaderName
fn name() -> HeaderName
Returns the name of the header field.
source§fn parse<M: HttpMessage>(msg: &M) -> Result<Self, ParseError>
fn parse<M: HttpMessage>(msg: &M) -> Result<Self, ParseError>
Parse the header from a HTTP message.
source§impl PartialEq for IfNoneMatch
impl PartialEq for IfNoneMatch
source§fn eq(&self, other: &IfNoneMatch) -> bool
fn eq(&self, other: &IfNoneMatch) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.source§impl TryIntoHeaderValue for IfNoneMatch
impl TryIntoHeaderValue for IfNoneMatch
§type Error = InvalidHeaderValue
type Error = InvalidHeaderValue
The type returned in the event of a conversion error.
source§fn try_into_value(self) -> Result<HeaderValue, Self::Error>
fn try_into_value(self) -> Result<HeaderValue, Self::Error>
Try to convert value to a HeaderValue.
impl Eq for IfNoneMatch
impl StructuralPartialEq for IfNoneMatch
Auto Trait Implementations§
impl Freeze for IfNoneMatch
impl RefUnwindSafe for IfNoneMatch
impl Send for IfNoneMatch
impl Sync for IfNoneMatch
impl Unpin for IfNoneMatch
impl UnwindSafe for IfNoneMatch
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to
key
and return true
if they are equal.