Enum actix_http::http::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 actix_http::Response;
use actix_http::http::header::IfMatch;

let mut builder = Response::Ok();
builder.set(IfMatch::Any);

use actix_http::Response;
use actix_http::http::header::{IfMatch, EntityTag};

let mut builder = Response::Ok();
builder.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

Only the listed items are a match

Tuple Fields of Items

0: Vec<EntityTag>

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 Display for IfMatch

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

Formats the value using the given formatter.

impl Header for IfMatch

fn name() -> HeaderName

Returns the name of the header field

fn parse<T>(msg: &T) -> Result<Self, ParseError> where
    T: HttpMessage, 

Parse a header

impl IntoHeaderValue for IfMatch

type Error = InvalidHeaderValue

The type returned in the event of a conversion error.

fn try_into(self) -> Result<HeaderValue, Self::Error>

Try to convert value to a Header value.

impl PartialEq<IfMatch> 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 StructuralPartialEq for IfMatch