Enum reqwest::header::IfNoneMatch
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pub enum IfNoneMatch { Any, Items(Vec<EntityTag>), }
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>)
Only the listed items are a match
Trait Implementations
impl Display for IfNoneMatch
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fn fmt(&self, f: &mut Formatter) -> Result<(), Error>
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Formats the value using the given formatter. Read more
impl PartialEq<IfNoneMatch> for IfNoneMatch
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fn eq(&self, __arg_0: &IfNoneMatch) -> bool
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This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, __arg_0: &IfNoneMatch) -> bool
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This method tests for !=
.
impl Debug for IfNoneMatch
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fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>
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Formats the value using the given formatter. Read more
impl Clone for IfNoneMatch
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fn clone(&self) -> IfNoneMatch
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl HeaderFormat for IfNoneMatch
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fn fmt_header(&self, f: &mut Formatter) -> Result<(), Error>
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Format a header to be output into a TcpStream. Read more
impl Header for IfNoneMatch
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fn header_name() -> &'static str
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Returns the name of the header field this belongs to. Read more
fn parse_header(raw: &[Vec<u8>]) -> Result<IfNoneMatch, Error>
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Parse a header from a raw stream of bytes. Read more