pub struct ETag(pub EntityTag);
Expand description
ETag
header, defined in
RFC 7232 §2.3
The ETag
header field in a response provides the current entity-tag
for the selected representation, as determined at the conclusion of
handling the request. An entity-tag is an opaque validator for
differentiating between multiple representations of the same
resource, regardless of whether those multiple representations are
due to resource state changes over time, content negotiation
resulting in multiple representations being valid at the same time,
or both. An entity-tag consists of an opaque quoted string, possibly
prefixed by a weakness indicator.
§ABNF
ETag = entity-tag
§Example Values
"xyzzy"
W/"xyzzy"
""
§Examples
use actix_web::HttpResponse;
use actix_web::http::header::{ETag, EntityTag};
let mut builder = HttpResponse::Ok();
builder.insert_header(
ETag(EntityTag::new_strong("xyzzy".to_owned()))
);
use actix_web::HttpResponse;
use actix_web::http::header::{ETag, EntityTag};
let mut builder = HttpResponse::Ok();
builder.insert_header(
ETag(EntityTag::new_weak("xyzzy".to_owned()))
);
Tuple Fields§
§0: EntityTag
Methods from Deref<Target = EntityTag>§
sourcepub fn strong_eq(&self, other: &EntityTag) -> bool
pub fn strong_eq(&self, other: &EntityTag) -> bool
For strong comparison two entity-tags are equivalent if both are not weak and their opaque-tags match character-by-character.
Trait Implementations§
source§impl Header for ETag
impl Header for ETag
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 ETag
impl PartialEq for ETag
source§impl TryIntoHeaderValue for ETag
impl TryIntoHeaderValue for ETag
§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 ETag
impl StructuralPartialEq for ETag
Auto Trait Implementations§
impl Freeze for ETag
impl RefUnwindSafe for ETag
impl Send for ETag
impl Sync for ETag
impl Unpin for ETag
impl UnwindSafe for ETag
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.