Struct headers::ETag

pub struct ETag(_);

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

impl Clone for ETag

pub fn clone(&self) -> ETag

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ETag

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

Formats the value using the given formatter.

impl Eq for ETag

impl From<ETag> for IfMatch

pub fn from(etag: ETag) -> IfMatch

Performs the conversion.

impl From<ETag> for IfNoneMatch

pub fn from(etag: ETag) -> IfNoneMatch

Performs the conversion.

impl FromStr for ETag

type Err = InvalidETag

The associated error which can be returned from parsing.

pub fn from_str(src: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Header for ETag

pub fn name() -> &'static HeaderName

The name of this header.

pub fn decode<'i, I>(values: &mut I) -> Result<Self, Error> where
    I: Iterator<Item = &'i HeaderValue>, 

Decode this type from an iterator of HeaderValues.

pub fn encode<E: Extend<HeaderValue>>(&self, values: &mut E)

Encode this type to a HeaderMap.

impl PartialEq<ETag> for ETag

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

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

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

This method tests for !=.

impl StructuralEq for ETag

impl StructuralPartialEq for ETag