Struct hyper::header::ETag
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pub struct ETag(pub EntityTag);
ETag
header, defined in RFC7232
The ETag
header field in a response provides the current entity-tag
for the selected representation, as determined at the conclusion of
handling the request. An entity-tag is an opaque validator for
differentiating between multiple representations of the same
resource, regardless of whether those multiple representations are
due to resource state changes over time, content negotiation
resulting in multiple representations being valid at the same time,
or both. An entity-tag consists of an opaque quoted string, possibly
prefixed by a weakness indicator.
ABNF
ETag = entity-tag
Example values
"xyzzy"
W/"xyzzy"
""
Examples
use hyper::header::{Headers, ETag, EntityTag}; let mut headers = Headers::new(); headers.set(ETag(EntityTag::new(false, "xyzzy".to_owned())));
use hyper::header::{Headers, ETag, EntityTag}; let mut headers = Headers::new(); headers.set(ETag(EntityTag::new(true, "xyzzy".to_owned())));
Methods from Deref<Target = EntityTag>
pub fn tag(&self) -> &str
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Get the tag.
pub fn set_tag(&mut self, tag: String)
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pub fn strong_eq(&self, other: &EntityTag) -> bool
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For strong comparison two entity-tags are equivalent if both are not weak and their opaque-tags match character-by-character.
pub fn weak_eq(&self, other: &EntityTag) -> bool
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For weak comparison two entity-tags are equivalent if their opaque-tags match character-by-character, regardless of either or both being tagged as "weak".
pub fn strong_ne(&self, other: &EntityTag) -> bool
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The inverse of EntityTag.strong_eq()
.
pub fn weak_ne(&self, other: &EntityTag) -> bool
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The inverse of EntityTag.weak_eq()
.
Trait Implementations
impl Clone for ETag
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fn clone(&self) -> ETag
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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 Debug for ETag
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fn fmt(&self, __arg_0: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more
impl PartialEq for ETag
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fn eq(&self, __arg_0: &ETag) -> 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: &ETag) -> bool
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This method tests for !=
.
impl Deref for ETag
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type Target = EntityTag
The resulting type after dereferencing.
fn deref(&self) -> &EntityTag
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Dereferences the value.
impl DerefMut for ETag
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impl Header for ETag
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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<Self>
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Parse a header from a raw stream of bytes. Read more
impl HeaderFormat for ETag
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fn fmt_header(&self, f: &mut Formatter) -> Result
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Format a header to be output into a TcpStream. Read more