Enum hyper::header::Pragma [] [src]

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

Corresponds to the no-cache value.

Every value other than no-cache.

Trait Implementations

impl Clone for Pragma
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Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

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

This method tests for !=.

impl Debug for Pragma
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Formats the value using the given formatter.

impl Header for Pragma
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Returns the name of the header field this belongs to. Read more

Parse a header from a raw stream of bytes. Read more

impl HeaderFormat for Pragma
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Format a header to be output into a TcpStream. Read more

impl Display for Pragma
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Formats the value using the given formatter.