Enum hyper::header::IfMatch

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

If-Match header, defined in RFC7232

The If-Match header field makes the request method conditional on the recipient origin server either having at least one current representation of the target resource, when the field-value is "*", or having a current representation of the target resource that has an entity-tag matching a member of the list of entity-tags provided in the field-value.

An origin server MUST use the strong comparison function when comparing entity-tags for If-Match, since the client intends this precondition to prevent the method from being applied if there have been any changes to the representation data.

ABNF

If-Match = "*" / 1#entity-tag

Example values

• "xyzzy"
• "xyzzy", "r2d2xxxx", "c3piozzzz"

Examples

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

let mut headers = Headers::new();
headers.set(IfMatch::Any);

use hyper::header::{Headers, IfMatch, EntityTag};

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

Variants

Any

Any value is a match

Items(Vec<EntityTag>)

Only the listed items are a match

Trait Implementations

impl Clone for IfMatch

fn clone(&self) -> IfMatch

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for IfMatch

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl PartialEq for IfMatch

fn eq(&self, other: &IfMatch) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &IfMatch) -> bool

This method tests for !=.

impl Header for IfMatch

fn header_name() -> &'static str

Returns the name of the header field this belongs to.

fn parse_header(raw: &[Vec<u8>]) -> Result<Self>

Parse a header from a raw stream of bytes.

impl HeaderFormat for IfMatch

fn fmt_header(&self, f: &mut Formatter) -> Result

Format a header to be output into a TcpStream.

impl Display for IfMatch

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.