Enum hyper::header::Pragma
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[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.
Variants
NoCache | Corresponds to the |
Ext | Every value other than |