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POST /join/{roomId}: Allow joining even when not invited #663 (#680)

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* POST /join/{roomId}: Allow joining even when not invited #663

Signed-off-by: Alex Chen <minecnly@gmail.com>

* POST /join/{roomId}: Use server in roomID as last resort to join

Signed-off-by: Alex Chen <minecnly@gmail.com>
This commit is contained in:
Alex Chen 2019-01-16 02:20:46 +08:00 committed by Brendan Abolivier
parent e063433b74
commit 4c5bd91e1c
1 changed files with 16 additions and 14 deletions
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30
src/github.com/matrix-org/dendrite/clientapi/routing/joinroom.go
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@ -118,30 +118,32 @@ func (r joinRoomReq) joinRoomByID(roomID string) util.JSONResponse {
if err := r.queryAPI.QueryInvitesForUser(r.req.Context(), &queryReq, &queryRes); err != nil {
return httputil.LogThenError(r.req, err)
}
if len(queryRes.InviteSenderUserIDs) == 0 {
// TODO: We might need to support clients which erroneously try to join
// the room by ID even when they are not invited.
// This can be done by removing this check and falling through to
// joinRoomUsingServers passing an empty list since joinRoomUserServers
// will check if we are already in the room first.
return util.JSONResponse{
Code: http.StatusForbidden,
JSON: jsonerror.Forbidden("You are not invited to the room"),
}
}
servers := []gomatrixserverlib.ServerName{}
seenBefore := map[gomatrixserverlib.ServerName]bool{}
seenInInviterIDs := map[gomatrixserverlib.ServerName]bool{}
for _, userID := range queryRes.InviteSenderUserIDs {
_, domain, err := gomatrixserverlib.SplitID('@', userID)
if err != nil {
return httputil.LogThenError(r.req, err)
}
if !seenBefore[domain] {
if !seenInInviterIDs[domain] {
servers = append(servers, domain)
seenBefore[domain] = true
seenInInviterIDs[domain] = true
}
}
// Also add the domain extracted from the roomID as a last resort to join
// in case the client is erroneously trying to join by ID without an invite
// or all previous attempts at domains extracted from the inviter IDs fail
// Note: It's no guarantee we'll succeed because a room isn't bound to the domain in its ID
_, domain, err := gomatrixserverlib.SplitID('!', roomID)
if err != nil {
return httputil.LogThenError(r.req, err)
}
if domain != r.cfg.Matrix.ServerName && !seenInInviterIDs[domain] {
servers = append(servers, domain)
}
return r.joinRoomUsingServers(roomID, servers)
}