dendrite/serverkeyapi/storage/cache/keydb.go
Neil Alexander 7d6461dd3c
Server key component (#1050)
* Server key API (works for monolith but not for polylith yet)

* Re-enable caching on server key API component

* Groundwork for HTTP APIs for server key API

* Hopefully implement HTTP for server key API

* Simplify public key request marshalling from map keys

* Update gomatrixserverlib

* go mod tidy

* Common -> internal

* remove keyring.go

* Update Docker Hub for server key API

* YAML is funny about indentation

* Wire in new server key API into hybrid monolith mode

* Create maps

* Route server key API endpoints on internal API mux

* Fix server key API URLs

* Add fetcher behaviour into server key API implementation

* Return error if we failed to fetch some keys

* Return results anyway

* Move things about a bit

* Remove unused code

* Fix comments, don't use federation sender URL in polylith mode

* Add server_key_api to sample config

* Review comments

* HTTP API to cache keys that have been requested

* Overwrite server_key_api listen in monolith hybrid mode
2020-05-27 10:19:24 +01:00

68 lines
1.8 KiB
Go

package cache
import (
"context"
"errors"
"github.com/matrix-org/dendrite/internal/caching"
"github.com/matrix-org/gomatrixserverlib"
)
// A Database implements gomatrixserverlib.KeyDatabase and is used to store
// the public keys for other matrix servers.
type KeyDatabase struct {
inner gomatrixserverlib.KeyDatabase
cache caching.ImmutableCache
}
func NewKeyDatabase(inner gomatrixserverlib.KeyDatabase, cache caching.ImmutableCache) (*KeyDatabase, error) {
if inner == nil {
return nil, errors.New("inner database can't be nil")
}
if cache == nil {
return nil, errors.New("cache can't be nil")
}
return &KeyDatabase{
inner: inner,
cache: cache,
}, nil
}
// FetcherName implements KeyFetcher
func (d KeyDatabase) FetcherName() string {
return "InMemoryKeyCache"
}
// FetchKeys implements gomatrixserverlib.KeyDatabase
func (d *KeyDatabase) FetchKeys(
ctx context.Context,
requests map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.Timestamp,
) (map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult, error) {
results := make(map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult)
for req := range requests {
if res, cached := d.cache.GetServerKey(req); cached {
results[req] = res
delete(requests, req)
}
}
fromDB, err := d.inner.FetchKeys(ctx, requests)
if err != nil {
return results, err
}
for req, res := range fromDB {
results[req] = res
d.cache.StoreServerKey(req, res)
}
return results, nil
}
// StoreKeys implements gomatrixserverlib.KeyDatabase
func (d *KeyDatabase) StoreKeys(
ctx context.Context,
keyMap map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult,
) error {
for req, res := range keyMap {
d.cache.StoreServerKey(req, res)
}
return d.inner.StoreKeys(ctx, keyMap)
}