[−][src]Struct headers::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
let etag = "\"xyzzy\"".parse::<headers::ETag>().unwrap();
Trait Implementations
impl Clone for ETag
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impl Debug for ETag
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impl Eq for ETag
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impl From<ETag> for IfMatch
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impl From<ETag> for IfNoneMatch
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fn from(etag: ETag) -> IfNoneMatch
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impl FromStr for ETag
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type Err = InvalidETag
The associated error which can be returned from parsing.
fn from_str(src: &str) -> Result<Self, Self::Err>
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impl Header for ETag
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fn name() -> &'static HeaderName
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fn decode<'i, I>(values: &mut I) -> Result<Self, Error> where
I: Iterator<Item = &'i HeaderValue>,
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I: Iterator<Item = &'i HeaderValue>,
fn encode<E: Extend<HeaderValue>>(&self, values: &mut E)
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impl PartialEq<ETag> for ETag
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impl StructuralEq for ETag
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impl StructuralPartialEq for ETag
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Auto Trait Implementations
impl RefUnwindSafe for ETag
impl Send for ETag
impl Sync for ETag
impl Unpin for ETag
impl UnwindSafe for ETag
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
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> 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> Same<T> for T
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type Output = T
Should always be Self
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, 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>,