Module codec 

Serialization of cached entries, and the on-the-wire format used by the shared backends.

Two layers are involved, and they are deliberately separate:

• A CacheCodec turns a CacheEntry into bytes and back. The default is PostcardCodec. A codec knows nothing about expiry.
• The envelope wraps that payload in a 21-byte versioned header that carries the magic, the format version, the codec id, and the entry’s expiry and stale-until timestamps.

See envelope for the byte layout. Custom codecs only implement CacheCodec; the envelope is applied by the backend.

Modules

envelope

The versioned envelope wrapped around every value written to a shared backend by 0.6.0 and later.

legacy

Reader for cache entries written by tower-http-cache 0.5.x.

Structs

PostcardCodec

Default CacheCodec implementation, backed by postcard.

Traits

CacheCodec

Trait representing a serialization strategy for cached entries.

Type Aliases

BincodeCodecDeprecated

Former name of PostcardCodec.