[−][src]Struct actix_web::http::header::ETag
ETag
header, defined in RFC7232
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_http::Response; use actix_http::http::header::{ETag, EntityTag}; let mut builder = Response::Ok(); builder.set(ETag(EntityTag::new(false, "xyzzy".to_owned())));
use actix_http::Response; use actix_http::http::header::{ETag, EntityTag}; let mut builder = Response::Ok(); builder.set(ETag(EntityTag::new(true, "xyzzy".to_owned())));
Methods from Deref<Target = EntityTag>
pub fn tag(&self) -> &str
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Get the tag.
pub fn set_tag(&mut self, tag: String)
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pub fn strong_eq(&self, other: &EntityTag) -> bool
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For strong comparison two entity-tags are equivalent if both are not weak and their opaque-tags match character-by-character.
pub fn weak_eq(&self, other: &EntityTag) -> bool
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For weak comparison two entity-tags are equivalent if their opaque-tags match character-by-character, regardless of either or both being tagged as "weak".
pub fn strong_ne(&self, other: &EntityTag) -> bool
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The inverse of EntityTag.strong_eq()
.
pub fn weak_ne(&self, other: &EntityTag) -> bool
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The inverse of EntityTag.weak_eq()
.
Trait Implementations
impl IntoHeaderValue for ETag
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type Error = InvalidHeaderValueBytes
The type returned in the event of a conversion error.
fn try_into(self) -> Result<HeaderValue, <ETag as IntoHeaderValue>::Error>
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impl Display for ETag
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impl Clone for ETag
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fn clone(&self) -> ETag
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fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl Header for ETag
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fn name() -> HeaderName
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fn parse<T>(msg: &T) -> Result<ETag, ParseError> where
T: HttpMessage,
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T: HttpMessage,
impl DerefMut for ETag
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impl PartialEq<ETag> for ETag
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impl Deref for ETag
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impl Debug for ETag
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Auto Trait Implementations
impl Send for ETag
impl Unpin for ETag
impl Sync for ETag
impl UnwindSafe for ETag
impl RefUnwindSafe for ETag
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Erased for T
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,