# Cache Responses
HTTP responses should be cached locally according to their cache-control headers.
Especially once Rhapsode starts supporting hyperlinks.

This could be developed as an independant project and integrated in!

## Caching headers
* `CacheControl`, legacy `Pragma: no-cache`
* `Expires`, may also be set via `CacheControl` or `Last-Modified`
* `Etag` - echo back in `If-None-Match`
* `Last-Modified` - echo back in `If-Modified-Since`
* `Vary` - indicates which headers to compare for equality before using a cache.

Use cached data for 304 responses.

## Implementation
I'd store an index file, with cached bodies stored seperately.

There'd be four parts to implementing the cache:
1. Annotating the request.
2. Loading cached data for 304 responses.
3. Storing cache responses.

GNOME's implementation: https://github.com/GNOME/libsoup/blob/mainline/libsoup/soup-cache.c