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dendrite/federationapi/routing/publicrooms.go
Neil Alexander a763cbb0e1
Roomserver/federation input refactor (#2104)
* Put federation client functions into their own file

* Look for missing auth events in RS input

* Remove retrieveMissingAuthEvents from federation API

* Logging

* Sorta transplanted the code over

* Use event origin failing all else

* Don't get stuck on mutexes:

* Add verifier

* Don't mark state events with zero snapshot NID as not existing

* Check missing state if not an outlier before storing the event

* Reject instead of soft-fail, don't copy roominfo so much

* Use synchronous contexts, limit time to fetch missing events

* Clean up some commented out bits

* Simplify `/send` endpoint significantly

* Submit async

* Report errors on sending to RS input

* Set max payload in NATS to 16MB

* Tweak metrics

* Add `workerForRoom` for tidiness

* Try skipping unmarshalling errors for RespMissingEvents

* Track missing prev events separately to avoid calculating state when not possible

* Tweak logic around checking missing state

* Care about state when checking missing prev events

* Don't check missing state for create events

* Try that again

* Handle create events better

* Send create room events as new

* Use given event kind when sending auth/state events

* Revert "Use given event kind when sending auth/state events"

This reverts commit 089d64d271.

* Only search for missing prev events or state for new events

* Tweaks

* We only have missing prev if we don't supply state

* Room version tweaks

* Allow async inputs again

* Apply backpressure to consumers/synchronous requests to hopefully stop things being overwhelmed

* Set timeouts on roomserver input tasks (need to decide what timeout makes sense)

* Use work queue policy, deliver all on restart

* Reduce chance of duplicates being sent by NATS

* Limit the number of servers we attempt to reduce backpressure

* Some review comment fixes

* Tidy up a couple things

* Don't limit servers, randomise order using map

* Some context refactoring

* Update gmsl

* Don't resend create events

* Set stateIDs length correctly or else the roomserver thinks there are missing events when there aren't

* Exclude our own servername

* Try backing off servers

* Make excluding self behaviour optional

* Exclude self from g_m_e

* Update sytest-whitelist

* Update consumers for the roomserver output stream

* Remember to send outliers for state returned from /gme

* Make full HTTP tests less upsetti

* Remove 'If a device list update goes missing, the server resyncs on the next one' from the sytest blacklist

* Remove debugging test

* Fix blacklist again, remove unnecessary duplicate context

* Clearer contexts, don't use background in case there's something happening there

* Don't queue up events more than once in memory

* Correctly identify create events when checking for state

* Fill in gaps again in /gme code

* Remove `AuthEventIDs` from `InputRoomEvent`

* Remove stray field

Co-authored-by: Kegan Dougal <kegan@matrix.org>
2022-01-27 14:29:14 +00:00

177 lines
5.8 KiB
Go

package routing
import (
"context"
"net/http"
"strconv"
"github.com/matrix-org/dendrite/clientapi/httputil"
"github.com/matrix-org/dendrite/clientapi/jsonerror"
roomserverAPI "github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
)
type PublicRoomReq struct {
Since string `json:"since,omitempty"`
Limit int16 `json:"limit,omitempty"`
Filter filter `json:"filter,omitempty"`
}
type filter struct {
SearchTerms string `json:"generic_search_term,omitempty"`
}
// GetPostPublicRooms implements GET and POST /publicRooms
func GetPostPublicRooms(req *http.Request, rsAPI roomserverAPI.RoomserverInternalAPI) util.JSONResponse {
var request PublicRoomReq
if fillErr := fillPublicRoomsReq(req, &request); fillErr != nil {
return *fillErr
}
if request.Limit == 0 {
request.Limit = 50
}
response, err := publicRooms(req.Context(), request, rsAPI)
if err != nil {
return jsonerror.InternalServerError()
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: response,
}
}
func publicRooms(
ctx context.Context, request PublicRoomReq, rsAPI roomserverAPI.RoomserverInternalAPI,
) (*gomatrixserverlib.RespPublicRooms, error) {
var response gomatrixserverlib.RespPublicRooms
var limit int16
var offset int64
limit = request.Limit
offset, err := strconv.ParseInt(request.Since, 10, 64)
// ParseInt returns 0 and an error when trying to parse an empty string
// In that case, we want to assign 0 so we ignore the error
if err != nil && len(request.Since) > 0 {
util.GetLogger(ctx).WithError(err).Error("strconv.ParseInt failed")
return nil, err
}
var queryRes roomserverAPI.QueryPublishedRoomsResponse
err = rsAPI.QueryPublishedRooms(ctx, &roomserverAPI.QueryPublishedRoomsRequest{}, &queryRes)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("QueryPublishedRooms failed")
return nil, err
}
response.TotalRoomCountEstimate = len(queryRes.RoomIDs)
if offset > 0 {
response.PrevBatch = strconv.Itoa(int(offset) - 1)
}
nextIndex := int(offset) + int(limit)
if response.TotalRoomCountEstimate > nextIndex {
response.NextBatch = strconv.Itoa(nextIndex)
}
if offset < 0 {
offset = 0
}
if nextIndex > len(queryRes.RoomIDs) {
nextIndex = len(queryRes.RoomIDs)
}
roomIDs := queryRes.RoomIDs[offset:nextIndex]
response.Chunk, err = fillInRooms(ctx, roomIDs, rsAPI)
return &response, err
}
// fillPublicRoomsReq fills the Limit, Since and Filter attributes of a GET or POST request
// on /publicRooms by parsing the incoming HTTP request
// Filter is only filled for POST requests
func fillPublicRoomsReq(httpReq *http.Request, request *PublicRoomReq) *util.JSONResponse {
if httpReq.Method == http.MethodGet {
limit, err := strconv.Atoi(httpReq.FormValue("limit"))
// Atoi returns 0 and an error when trying to parse an empty string
// In that case, we want to assign 0 so we ignore the error
if err != nil && len(httpReq.FormValue("limit")) > 0 {
util.GetLogger(httpReq.Context()).WithError(err).Error("strconv.Atoi failed")
reqErr := jsonerror.InternalServerError()
return &reqErr
}
request.Limit = int16(limit)
request.Since = httpReq.FormValue("since")
return nil
} else if httpReq.Method == http.MethodPost {
return httputil.UnmarshalJSONRequest(httpReq, request)
}
return &util.JSONResponse{
Code: http.StatusMethodNotAllowed,
JSON: jsonerror.NotFound("Bad method"),
}
}
// due to lots of switches
func fillInRooms(ctx context.Context, roomIDs []string, rsAPI roomserverAPI.RoomserverInternalAPI) ([]gomatrixserverlib.PublicRoom, error) {
avatarTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.avatar", StateKey: ""}
nameTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.name", StateKey: ""}
canonicalTuple := gomatrixserverlib.StateKeyTuple{EventType: gomatrixserverlib.MRoomCanonicalAlias, StateKey: ""}
topicTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.topic", StateKey: ""}
guestTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.guest_access", StateKey: ""}
visibilityTuple := gomatrixserverlib.StateKeyTuple{EventType: gomatrixserverlib.MRoomHistoryVisibility, StateKey: ""}
joinRuleTuple := gomatrixserverlib.StateKeyTuple{EventType: gomatrixserverlib.MRoomJoinRules, StateKey: ""}
var stateRes roomserverAPI.QueryBulkStateContentResponse
err := rsAPI.QueryBulkStateContent(ctx, &roomserverAPI.QueryBulkStateContentRequest{
RoomIDs: roomIDs,
AllowWildcards: true,
StateTuples: []gomatrixserverlib.StateKeyTuple{
nameTuple, canonicalTuple, topicTuple, guestTuple, visibilityTuple, joinRuleTuple, avatarTuple,
{EventType: gomatrixserverlib.MRoomMember, StateKey: "*"},
},
}, &stateRes)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("QueryBulkStateContent failed")
return nil, err
}
chunk := make([]gomatrixserverlib.PublicRoom, len(roomIDs))
i := 0
for roomID, data := range stateRes.Rooms {
pub := gomatrixserverlib.PublicRoom{
RoomID: roomID,
}
joinCount := 0
var joinRule, guestAccess string
for tuple, contentVal := range data {
if tuple.EventType == gomatrixserverlib.MRoomMember && contentVal == "join" {
joinCount++
continue
}
switch tuple {
case avatarTuple:
pub.AvatarURL = contentVal
case nameTuple:
pub.Name = contentVal
case topicTuple:
pub.Topic = contentVal
case canonicalTuple:
if _, _, err := gomatrixserverlib.SplitID('#', contentVal); err == nil {
pub.CanonicalAlias = contentVal
}
case visibilityTuple:
pub.WorldReadable = contentVal == "world_readable"
// need both of these to determine whether guests can join
case joinRuleTuple:
joinRule = contentVal
case guestTuple:
guestAccess = contentVal
}
}
if joinRule == gomatrixserverlib.Public && guestAccess == "can_join" {
pub.GuestCanJoin = true
}
pub.JoinedMembersCount = joinCount
chunk[i] = pub
i++
}
return chunk, nil
}