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package internal
import (
"context"
"fmt"
"time"
"github.com/matrix-org/dendrite/federationsender/api"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
)
// QueryJoinedHostServerNamesInRoom implements api.FederationSenderInternalAPI
func (f *FederationSenderInternalAPI) QueryJoinedHostServerNamesInRoom(
ctx context.Context,
request *api.QueryJoinedHostServerNamesInRoomRequest,
response *api.QueryJoinedHostServerNamesInRoomResponse,
) (err error) {
joinedHosts, err := f.db.GetJoinedHostsForRooms(ctx, []string{request.RoomID})
if err != nil {
return
}
response.ServerNames = joinedHosts
return
}
func (a *FederationSenderInternalAPI) fetchServerKeysDirectly(ctx context.Context, serverName gomatrixserverlib.ServerName) (*gomatrixserverlib.ServerKeys, error) {
ctx, cancel := context.WithTimeout(ctx, time.Second*30)
defer cancel()
ires, err := a.doRequest(serverName, func() (interface{}, error) {
return a.federation.GetServerKeys(ctx, serverName)
})
if err != nil {
return nil, err
}
sks := ires.(gomatrixserverlib.ServerKeys)
return &sks, nil
}
func (a *FederationSenderInternalAPI) fetchServerKeysFromCache(
ctx context.Context, req *api.QueryServerKeysRequest,
) ([]gomatrixserverlib.ServerKeys, error) {
var results []gomatrixserverlib.ServerKeys
for keyID, criteria := range req.KeyIDToCriteria {
serverKeysResponses, _ := a.db.GetNotaryKeys(ctx, req.ServerName, []gomatrixserverlib.KeyID{keyID})
if len(serverKeysResponses) == 0 {
return nil, fmt.Errorf("failed to find server key response for key ID %s", keyID)
}
// we should only get 1 result as we only gave 1 key ID
sk := serverKeysResponses[0]
util.GetLogger(ctx).Infof("fetchServerKeysFromCache: minvalid:%v keys: %+v", criteria.MinimumValidUntilTS, sk)
if criteria.MinimumValidUntilTS != 0 {
// check if it's still valid. if they have the same value that's also valid
if sk.ValidUntilTS < criteria.MinimumValidUntilTS {
return nil, fmt.Errorf(
"found server response for key ID %s but it is no longer valid, min: %v valid_until: %v",
keyID, criteria.MinimumValidUntilTS, sk.ValidUntilTS,
)
}
}
results = append(results, sk)
}
return results, nil
}
func (a *FederationSenderInternalAPI) QueryServerKeys(
ctx context.Context, req *api.QueryServerKeysRequest, res *api.QueryServerKeysResponse,
) error {
// attempt to satisfy the entire request from the cache first
results, err := a.fetchServerKeysFromCache(ctx, req)
if err == nil {
// satisfied entirely from cache, return it
res.ServerKeys = results
return nil
}
util.GetLogger(ctx).WithField("server", req.ServerName).WithError(err).Warn("notary: failed to satisfy keys request entirely from cache, hitting direct")
serverKeys, err := a.fetchServerKeysDirectly(ctx, req.ServerName)
if err != nil {
// try to load as much as we can from the cache in a best effort basis
util.GetLogger(ctx).WithField("server", req.ServerName).WithError(err).Warn("notary: failed to ask server for keys, returning best effort keys")
serverKeysResponses, dbErr := a.db.GetNotaryKeys(ctx, req.ServerName, req.KeyIDs())
if dbErr != nil {
return fmt.Errorf("notary: server returned %s, and db returned %s", err, dbErr)
}
res.ServerKeys = serverKeysResponses
return nil
}
// cache it!
if err = a.db.UpdateNotaryKeys(context.Background(), req.ServerName, *serverKeys); err != nil {
// non-fatal, still return the response
util.GetLogger(ctx).WithError(err).Warn("failed to UpdateNotaryKeys")
}
res.ServerKeys = []gomatrixserverlib.ServerKeys{*serverKeys}
return nil
}
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