Enum hyper::header::IfNoneMatch [] [src]

pub enum IfNoneMatch {
    Any,
    Items(Vec<EntityTag>),
}

If-None-Match header, defined in RFC7232

The If-None-Match header field makes the request method conditional on a recipient cache or origin server either not having any current representation of the target resource, when the field-value is "*", or having a selected representation with an entity-tag that does not match any of those listed in the field-value.

A recipient MUST use the weak comparison function when comparing entity-tags for If-None-Match (Section 2.3.2), since weak entity-tags can be used for cache validation even if there have been changes to the representation data.

ABNF

If-None-Match = "*" / 1#entity-tag

Example values

Examples

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

let mut headers = Headers::new();
headers.set(IfNoneMatch::Any);
use hyper::header::{Headers, IfNoneMatch, EntityTag};

let mut headers = Headers::new();
headers.set(
    IfNoneMatch::Items(vec![
        EntityTag::new(false, "xyzzy".to_owned()),
        EntityTag::new(false, "foobar".to_owned()),
        EntityTag::new(false, "bazquux".to_owned()),
    ])
);

Variants

Any value is a match

Only the listed items are a match

Trait Implementations

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

1.0.0
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Performs copy-assignment from source. Read more

impl Debug for IfNoneMatch
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Formats the value using the given formatter. Read more

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

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This method tests for !=.

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

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

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

impl Display for IfNoneMatch
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Formats the value using the given formatter. Read more