twins-upstream/PROPOSALS.md
2020-11-09 21:12:22 -08:00

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This page is also available at [gemini://twins.rocketnine.space/proposals.gmi](gemini://twins.rocketnine.space/proposals.gmi)
The following proposals add fields to the response header of successful
requests.
Standard successful response header (for comparison):
```
20 text/gemini; charset=utf-8
```
These additions are backwards-compatible as specified in [RFC 2045](https://tools.ietf.org/html/rfc2045):
> MIME implementations must ignore any parameters whose names they do not recognize.
The terms MAY, SHOULD and SHOULD NOT are defined in [RFC 2119](https://tools.ietf.org/html/rfc2119).
# Cache
Gemini servers MAY include a duration (in seconds) which a client SHOULD cache
a resource when the request is successful. When a cache duration of 0 or
less is provided, clients SHOULD NOT cache the resource.
Cache for one week:
```
20 text/gemini; charset=utf-8; cache=604800
```
Do not cache:
```
20 text/gemini; charset=utf-8; cache=0
```
# Size
Gemini servers SHOULD include the size (in bytes) of the response body when the
request is successful. Clients SHOULD utilize this information when downloading
files to indicate progress.
```
20 text/gemini; charset=utf-8; size=1108
```