Struct headers_ext::IfNoneMatch [−][src]
pub struct IfNoneMatch(_);
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();
Methods
impl IfNoneMatch
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impl IfNoneMatch
pub fn any() -> IfNoneMatch
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pub fn any() -> IfNoneMatch
Create a new If-None-Match: *
header.
Trait Implementations
impl Clone for IfNoneMatch
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impl Clone for IfNoneMatch
fn clone(&self) -> IfNoneMatch
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fn clone(&self) -> IfNoneMatch
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl Debug for IfNoneMatch
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impl Debug for IfNoneMatch
fn fmt(&self, f: &mut Formatter) -> Result
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fn fmt(&self, f: &mut Formatter) -> Result
Formats the value using the given formatter. Read more
impl PartialEq for IfNoneMatch
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impl PartialEq for IfNoneMatch
fn eq(&self, other: &IfNoneMatch) -> bool
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fn eq(&self, other: &IfNoneMatch) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &IfNoneMatch) -> bool
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fn ne(&self, other: &IfNoneMatch) -> bool
This method tests for !=
.
impl From<ETag> for IfNoneMatch
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impl From<ETag> for IfNoneMatch
fn from(etag: ETag) -> IfNoneMatch
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fn from(etag: ETag) -> IfNoneMatch
Performs the conversion.
Auto Trait Implementations
impl Send for IfNoneMatch
impl Send for IfNoneMatch
impl Sync for IfNoneMatch
impl Sync for IfNoneMatch