Enum iron::headers::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.
Variants
NoCache | Corresponds to the   | 
Ext | Every value other than   |