Struct Age

pub struct Age(/* private fields */);

Age header, defined in RFC7234

The “Age” header field conveys the sender’s estimate of the amount of time since the response was generated or successfully validated at the origin server. Age values are calculated as specified in Section 4.2.3.

ABNF

Age = delta-seconds

The Age field-value is a non-negative integer, representing time in seconds (see Section 1.2.1).

The presence of an Age header field implies that the response was not generated or validated by the origin server for this request. However, lack of an Age header field does not imply the origin was contacted, since the response might have been received from an HTTP/1.0 cache that does not implement Age.

Example values

• 3600

Example

use headers::Age;

let len = Age::from_secs(60);

Implementations

impl Age

pub fn from_secs(secs: u64) -> Age

Creates a new Age header from the specified number of whole seconds.

pub fn as_secs(&self) -> u64

Returns the number of seconds for this Age header.

Trait Implementations

impl Clone for Age

fn clone(&self) -> Age

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Age

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

Formats the value using the given formatter.

impl From<Duration> for Age

fn from(dur: Duration) -> Age

Converts to this type from the input type.

impl Hash for Age

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Header for Age

fn name() -> &'static HeaderName

The name of this header.

fn decode<'i, I>(values: &mut I) -> Result<Age, Error>

where I: Iterator<Item = &'i HeaderValue>,

Decode this type from an iterator of HeaderValues.

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

where E: Extend<HeaderValue>,

Encode this type to a HeaderMap.

impl Ord for Age

fn cmp(&self, other: &Age) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Age

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for Age

fn partial_cmp(&self, other: &Age) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Age

impl Eq for Age

impl StructuralPartialEq for Age