rama::http::headers

Struct ETag

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pub struct ETag(/* private fields */);
Expand description

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

let etag = "\"xyzzy\"".parse::<headers::ETag>().unwrap();

Trait Implementations§

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impl Clone for ETag

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fn clone(&self) -> ETag

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ETag

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl From<ETag> for IfMatch

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fn from(etag: ETag) -> IfMatch

Converts to this type from the input type.
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impl From<ETag> for IfNoneMatch

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fn from(etag: ETag) -> IfNoneMatch

Converts to this type from the input type.
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impl FromStr for ETag

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type Err = InvalidETag

The associated error which can be returned from parsing.
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fn from_str(src: &str) -> Result<ETag, <ETag as FromStr>::Err>

Parses a string s to return a value of this type. Read more
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impl Header for ETag

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fn name() -> &'static HeaderName

The name of this header.
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fn decode<'i, I>(values: &mut I) -> Result<ETag, Error>
where I: Iterator<Item = &'i HeaderValue>,

Decode this type from an iterator of HeaderValues.
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fn encode<E>(&self, values: &mut E)
where E: Extend<HeaderValue>,

Encode this type to a HeaderMap. Read more
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impl PartialEq for ETag

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fn eq(&self, other: &ETag) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for ETag

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impl StructuralPartialEq for ETag

Auto Trait Implementations§

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impl !Freeze for ETag

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impl RefUnwindSafe for ETag

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impl Send for ETag

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impl Sync for ETag

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impl Unpin for ETag

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impl UnwindSafe for ETag

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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fn equivalent(&self, key: &K) -> bool

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Causes self to use its Binary implementation when Debug-formatted.
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Causes self to use its Display implementation when Debug-formatted.
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Causes self to use its LowerExp implementation when Debug-formatted.
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Causes self to use its LowerHex implementation when Debug-formatted.
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impl<H> HeaderExt for H
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fn encode_to_value(&self) -> HeaderValue

Encode this Header to HeaderValue.
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