Struct headers::IfNoneMatch
source · pub struct IfNoneMatch(/* private fields */);
Expand description
If-None-Match
header, defined in
RFC7232
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 headers::IfNoneMatch;
let if_none_match = IfNoneMatch::any();
Implementations§
source§impl IfNoneMatch
impl IfNoneMatch
sourcepub fn any() -> IfNoneMatch
pub fn any() -> IfNoneMatch
Create a new If-None-Match: *
header.
sourcepub fn precondition_passes(&self, etag: &ETag) -> bool
pub fn precondition_passes(&self, etag: &ETag) -> bool
Checks whether the ETag passes this precondition.
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 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 IfNoneMatch
impl Header for IfNoneMatch
source§impl PartialEq for IfNoneMatch
impl PartialEq 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
)