Struct headers::IfMatch

pub struct IfMatch(/* private fields */);

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 headers::IfMatch;

let if_match = IfMatch::any();

Implementations

impl IfMatch

pub fn any() -> IfMatch

Create a new If-Match: * header.

pub fn is_any(&self) -> bool

Returns whether this is If-Match: *, matching any entity tag.

pub fn precondition_passes(&self, etag: &ETag) -> bool

Checks whether the ETag strongly matches.

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 From<ETag> for IfMatch

fn from(etag: ETag) -> IfMatch

Converts to this type from the input type.

impl Header for IfMatch

fn name() -> &'static HeaderName

The name of this header.

fn decode<'i, I>(values: &mut I) -> Result<Self, Error>

where I: Iterator<Item = &'i HeaderValue>,

Decode this type from an iterator of HeaderValues.

fn encode<E: Extend<HeaderValue>>(&self, values: &mut E)

Encode this type to a HeaderMap.

impl PartialEq for IfMatch

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for IfMatch