Enum hyper::header::Pragma
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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
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fn clone(&self) -> Pragma
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl PartialEq for Pragma
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fn eq(&self, __arg_0: &Pragma) -> bool
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This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, __arg_0: &Pragma) -> bool
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This method tests for !=
.
impl Debug for Pragma
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fn fmt(&self, __arg_0: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more
impl Header for Pragma
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fn header_name() -> &'static str
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Returns the name of the header field this belongs to. Read more
fn parse_header(raw: &[Vec<u8>]) -> Result<Pragma>
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Parse a header from a raw stream of bytes. Read more
impl HeaderFormat for Pragma
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fn fmt_header(&self, f: &mut Formatter) -> Result
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Format a header to be output into a TcpStream. Read more