Struct kvarn::vary::Settings

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pub struct Settings { /* private fields */ }
Expand description

The rules for handling and caching a request/response.

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impl Settings

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pub fn empty() -> Self

Returns an empty set of rules. Will not cache any variants, except compressed.

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pub fn add_rule( self, request_header: &'static str, transformation: impl Fn(&str) -> Cow<'static, str> + Send + Sync + 'static, default: &'static str ) -> Self

Add a custom rule.

The request_header is used when outputting the vary header and for the internal cache.

transformation takes request_header and (hopefully, for performance) narrows the variants down to a finite number.

Prefer to return a limited set of strings from the transformation to minimize cache size. If you generate Strings, limit the amount of different strings.

If you have a large set or infinitely many variants outputted by transformation, the cache will suffer. Consider disabling the cache for the files affected by this rule to improve performance.

§Panics

Will panic if the request_header contains invalid bytes. All of the bytes must satisfy b >= 32 && b < 127 || b == b'\t' where b is a byte. See utils::is_valid_header_value_byte.

Trait Implementations§

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impl Clone for Settings

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fn clone(&self) -> Settings

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 Settings

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

Formats the value using the given formatter. Read more
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impl Default for Settings

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fn default() -> Settings

Returns the “default value” for a type. Read more

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