Struct rama::http::headers::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

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

This method 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

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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Checks if this value is equivalent to the given key. Read more
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Compare self to key and return true if they are equal.
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Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
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Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
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Causes self to use its UpperExp implementation when Debug-formatted.
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where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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Returns the argument unchanged.

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impl<H> HeaderExt for H
where H: Header + Sealed,

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fn encode_to_value(&self) -> HeaderValue

Encode this Header to HeaderValue.
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Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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