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ETag and conditional response helpers.

Provides an IfNoneMatch extractor for the If-None-Match request header, a conditional helper that returns 304 when the ETag matches, and a with_etag helper to attach an ETag header to a response.

Structs

IfNoneMatch

Extractor for the If-None-Match request header.

Functions

conditional

Returns Some(304 Not Modified) if etag matches the client’s If-None-Match value. Returns None otherwise, signalling the caller should send the full response.

with_etag

Attaches an ETag header to a response.