pub struct ETag(/* private fields */);
Expand description
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§
source§impl From<ETag> for IfNoneMatch
impl From<ETag> for IfNoneMatch
source§fn from(etag: ETag) -> IfNoneMatch
fn from(etag: ETag) -> IfNoneMatch
Converts to this type from the input type.
source§impl Header for ETag
impl Header for ETag
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
)