rama::http::headers

Struct IfMatch

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

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§

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impl IfMatch

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pub fn any() -> IfMatch

Create a new If-Match: * header.

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pub fn is_any(&self) -> bool

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

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

Checks whether the ETag strongly matches.

Trait Implementations§

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impl Clone for IfMatch

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fn clone(&self) -> IfMatch

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for IfMatch

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

Formats the value using the given formatter. Read more
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impl From<ETag> for IfMatch

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fn from(etag: ETag) -> IfMatch

Converts to this type from the input type.
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impl Header for IfMatch

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fn name() -> &'static HeaderName

The name of this header.
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fn decode<'i, I>(values: &mut I) -> Result<IfMatch, Error>
where I: Iterator<Item = &'i HeaderValue>,

Decode this type from an iterator of HeaderValues.
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fn encode<E>(&self, values: &mut E)
where E: Extend<HeaderValue>,

Encode this type to a HeaderMap. Read more
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impl PartialEq for IfMatch

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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Encode this Header to HeaderValue.
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