Struct awc::http::header::ETag[][src]

pub struct ETag(pub EntityTag);
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

use actix_http::Response;
use actix_http::http::header::{ETag, EntityTag};

let mut builder = Response::Ok();
builder.set(ETag(EntityTag::new(false, "xyzzy".to_owned())));
use actix_http::Response;
use actix_http::http::header::{ETag, EntityTag};

let mut builder = Response::Ok();
builder.set(ETag(EntityTag::new(true, "xyzzy".to_owned())));

Tuple Fields

0: EntityTag

Methods from Deref<Target = EntityTag>

Get the tag.

Set the tag.

Panics

If the tag contains invalid characters.

For strong comparison two entity-tags are equivalent if both are not weak and their opaque-tags match character-by-character.

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”.

The inverse of EntityTag.strong_eq().

The inverse of EntityTag.weak_eq().

Trait Implementations

Returns a copy of the value. Read more

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The resulting type after dereferencing.

Dereferences the value.

Mutably dereferences the value.

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Returns the name of the header field

Parse a header

The type returned in the event of a conversion error.

Try to convert value to a Header value.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

Auto Trait Implementations

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