Enum websocket::header::IfNoneMatch
source · [−]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 hyper::header::{Headers, IfNoneMatch};
let mut headers = Headers::new();
headers.set(IfNoneMatch::Any);
use hyper::header::{Headers, IfNoneMatch, EntityTag};
let mut headers = Headers::new();
headers.set(
IfNoneMatch::Items(vec![
EntityTag::new(false, "xyzzy".to_owned()),
EntityTag::new(false, "foobar".to_owned()),
EntityTag::new(false, "bazquux".to_owned()),
])
);
Variants
Any
Any value is a match
Items(Vec<EntityTag, Global>)
Only the listed items are a match
Trait Implementations
sourceimpl Clone for IfNoneMatch
impl Clone for IfNoneMatch
sourcefn clone(&self) -> IfNoneMatch
fn clone(&self) -> IfNoneMatch
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl Debug for IfNoneMatch
impl Debug for IfNoneMatch
sourceimpl Display for IfNoneMatch
impl Display for IfNoneMatch
sourceimpl Header for IfNoneMatch
impl Header for IfNoneMatch
sourcefn header_name() -> &'static str
fn header_name() -> &'static str
Returns the name of the header field this belongs to. Read more
sourcefn parse_header(raw: &[Vec<u8, Global>]) -> Result<IfNoneMatch, Error>
fn parse_header(raw: &[Vec<u8, Global>]) -> Result<IfNoneMatch, Error>
Parse a header from a raw stream of bytes. Read more
sourceimpl HeaderFormat for IfNoneMatch
impl HeaderFormat for IfNoneMatch
sourceimpl PartialEq<IfNoneMatch> for IfNoneMatch
impl PartialEq<IfNoneMatch> for IfNoneMatch
sourcefn 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 ==
. Read more
sourcefn ne(&self, other: &IfNoneMatch) -> bool
fn ne(&self, other: &IfNoneMatch) -> bool
This method tests for !=
.
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
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more