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
source§fn eq(&self, other: &IfNoneMatch) -> bool
fn eq(&self, other: &IfNoneMatch) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.impl StructuralPartialEq for IfNoneMatch
Auto Trait Implementations§
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