Struct 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 duplicate 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

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 40 bytes