Enum Pragma

pub enum Pragma {
    NoCache,
    Ext(String),
}

The Pragma header defined by HTTP/1.0.

The “Pragma” header field allows backwards compatibility with HTTP/1.0 caches, so that clients can specify a “no-cache” request that they will understand (as Cache-Control was not defined until HTTP/1.1). When the Cache-Control header field is also present and understood in a request, Pragma is ignored. In HTTP/1.0, Pragma was defined as an extensible field for implementation-specified directives for recipients. This specification deprecates such extensions to improve interoperability.

Spec: https://tools.ietf.org/html/rfc7234#section-5.4

Examples

use hyper::header::{Headers, Pragma};

let mut headers = Headers::new();
headers.set(Pragma::NoCache);

use hyper::header::{Headers, Pragma};

let mut headers = Headers::new();
headers.set(Pragma::Ext("foobar".to_owned()));

Variants

NoCache

Corresponds to the no-cache value.

Ext(String)

Every value other than no-cache.

Trait Implementations

impl Clone for Pragma

fn clone(&self) -> Pragma

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Pragma

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

Formats the value using the given formatter.

impl Display for Pragma

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

Formats the value using the given formatter.

impl Header for Pragma

fn header_name() -> &'static str

Returns the name of the header field this belongs to.

fn parse_header(raw: &Raw) -> Result<Pragma>

Parse a header from a raw stream of bytes.

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

Format a header to outgoing stream.

impl PartialEq for Pragma

fn eq(&self, other: &Pragma) -> 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 StructuralPartialEq for Pragma