PerformJoin implements api.FederationInternalAPI
( ctx context.Context, request *api.PerformJoinRequest, response *api.PerformJoinResponse, )
| 45 | |
| 46 | // PerformJoin implements api.FederationInternalAPI |
| 47 | func (r *FederationInternalAPI) PerformJoin( |
| 48 | ctx context.Context, |
| 49 | request *api.PerformJoinRequest, |
| 50 | response *api.PerformJoinResponse, |
| 51 | ) { |
| 52 | // Check that a join isn't already in progress for this user/room. |
| 53 | j := federatedJoin{request.UserID, request.RoomID} |
| 54 | if _, found := r.joins.Load(j); found { |
| 55 | response.LastError = &gomatrix.HTTPError{ |
| 56 | Code: 429, |
| 57 | Message: `{ |
| 58 | "errcode": "M_LIMIT_EXCEEDED", |
| 59 | "error": "There is already a federated join to this room in progress. Please wait for it to finish." |
| 60 | }`, // TODO: Why do none of our error types play nicely with each other? |
| 61 | } |
| 62 | return |
| 63 | } |
| 64 | r.joins.Store(j, nil) |
| 65 | defer r.joins.Delete(j) |
| 66 | |
| 67 | // Look up the supported room versions. |
| 68 | var supportedVersions []gomatrixserverlib.RoomVersion |
| 69 | for version := range version.SupportedRoomVersions() { |
| 70 | supportedVersions = append(supportedVersions, version) |
| 71 | } |
| 72 | |
| 73 | // Deduplicate the server names we were provided but keep the ordering |
| 74 | // as this encodes useful information about which servers are most likely |
| 75 | // to respond. |
| 76 | seenSet := make(map[gomatrixserverlib.ServerName]bool) |
| 77 | var uniqueList []gomatrixserverlib.ServerName |
| 78 | for _, srv := range request.ServerNames { |
| 79 | if seenSet[srv] || srv == r.cfg.Matrix.ServerName { |
| 80 | continue |
| 81 | } |
| 82 | seenSet[srv] = true |
| 83 | uniqueList = append(uniqueList, srv) |
| 84 | } |
| 85 | request.ServerNames = uniqueList |
| 86 | |
| 87 | // Try each server that we were provided until we land on one that |
| 88 | // successfully completes the make-join send-join dance. |
| 89 | var lastErr error |
| 90 | for _, serverName := range request.ServerNames { |
| 91 | if err := r.performJoinUsingServer( |
| 92 | ctx, |
| 93 | request.RoomID, |
| 94 | request.UserID, |
| 95 | request.Content, |
| 96 | serverName, |
| 97 | supportedVersions, |
| 98 | ); err != nil { |
| 99 | logrus.WithError(err).WithFields(logrus.Fields{ |
| 100 | "server_name": serverName, |
| 101 | "room_id": request.RoomID, |
| 102 | }).Warnf("Failed to join room through server") |
| 103 | lastErr = err |
| 104 | continue |
nothing calls this directly
no test coverage detected