Struct salvo::http::headers::ETag[−][src]

pub struct ETag(_);
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

impl Clone for ETag[src]

pub fn clone(&self) -> ETag[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl Debug for ETag[src]

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

Formats the value using the given formatter. Read more

impl From<ETag> for IfMatch[src]

pub fn from(etag: ETag) -> IfMatch[src]

Performs the conversion.

impl From<ETag> for IfNoneMatch[src]

pub fn from(etag: ETag) -> IfNoneMatch[src]

Performs the conversion.

impl FromStr for ETag[src]

type Err = InvalidETag

The associated error which can be returned from parsing.

pub fn from_str(src: &str) -> Result<ETag, <ETag as FromStr>::Err>[src]

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

impl Header for ETag[src]

pub fn name() -> &'static HeaderName[src]

The name of this header.

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

Decode this type from an iterator of HeaderValues.

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

Encode this type to a HeaderMap. Read more

impl PartialEq<ETag> for ETag[src]

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

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

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

This method tests for !=.

impl Eq for ETag[src]

impl StructuralEq for ETag[src]

impl StructuralPartialEq for ETag[src]

Auto Trait Implementations

impl RefUnwindSafe for ETag

impl Send for ETag

impl Sync for ETag

impl Unpin for ETag

impl UnwindSafe for ETag

Blanket Implementations

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

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<Q, K> Equivalent<K> for Q where
    Q: Eq + ?Sized,
    K: Borrow<Q> + ?Sized, [src]

pub fn equivalent(&self, key: &K) -> bool[src]

Compare self to key and return true if they are equal.

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T> Instrument for T[src]

fn instrument(self, span: Span) -> Instrumented<Self>[src]

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self>[src]

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for T where
    U: From<T>, [src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<T> Same<T> for T

type Output = T

Should always be Self

impl<T> ToOwned for T where
    T: Clone, [src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.

impl<V, T> VZip<V> for T where
    V: MultiLane<T>, 

pub fn vzip(self) -> V