dendrite/roomserver/api/query.go

571 lines
22 KiB
Go

// Copyright 2017 Vector Creations Ltd
// Copyright 2018 New Vector Ltd
// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package api
import (
"context"
"errors"
"net/http"
"github.com/matrix-org/dendrite/common/caching"
commonHTTP "github.com/matrix-org/dendrite/common/http"
"github.com/matrix-org/gomatrixserverlib"
opentracing "github.com/opentracing/opentracing-go"
)
// QueryLatestEventsAndStateRequest is a request to QueryLatestEventsAndState
type QueryLatestEventsAndStateRequest struct {
// The room ID to query the latest events for.
RoomID string `json:"room_id"`
// The state key tuples to fetch from the room current state.
// If this list is empty or nil then no state events are returned.
StateToFetch []gomatrixserverlib.StateKeyTuple `json:"state_to_fetch"`
}
// QueryLatestEventsAndStateResponse is a response to QueryLatestEventsAndState
// This is used when sending events to set the prev_events, auth_events and depth.
// It is also used to tell whether the event is allowed by the event auth rules.
type QueryLatestEventsAndStateResponse struct {
// Copy of the request for debugging.
QueryLatestEventsAndStateRequest
// Does the room exist?
// If the room doesn't exist this will be false and LatestEvents will be empty.
RoomExists bool `json:"room_exists"`
// The room version of the room.
RoomVersion gomatrixserverlib.RoomVersion `json:"room_version"`
// The latest events in the room.
// These are used to set the prev_events when sending an event.
LatestEvents []gomatrixserverlib.EventReference `json:"latest_events"`
// The state events requested.
// This list will be in an arbitrary order.
// These are used to set the auth_events when sending an event.
// These are used to check whether the event is allowed.
StateEvents []gomatrixserverlib.HeaderedEvent `json:"state_events"`
// The depth of the latest events.
// This is one greater than the maximum depth of the latest events.
// This is used to set the depth when sending an event.
Depth int64 `json:"depth"`
}
// QueryStateAfterEventsRequest is a request to QueryStateAfterEvents
type QueryStateAfterEventsRequest struct {
// The room ID to query the state in.
RoomID string `json:"room_id"`
// The list of previous events to return the events after.
PrevEventIDs []string `json:"prev_event_ids"`
// The state key tuples to fetch from the state
StateToFetch []gomatrixserverlib.StateKeyTuple `json:"state_to_fetch"`
}
// QueryStateAfterEventsResponse is a response to QueryStateAfterEvents
type QueryStateAfterEventsResponse struct {
// Copy of the request for debugging.
QueryStateAfterEventsRequest
// Does the room exist on this roomserver?
// If the room doesn't exist this will be false and StateEvents will be empty.
RoomExists bool `json:"room_exists"`
// The room version of the room.
RoomVersion gomatrixserverlib.RoomVersion `json:"room_version"`
// Do all the previous events exist on this roomserver?
// If some of previous events do not exist this will be false and StateEvents will be empty.
PrevEventsExist bool `json:"prev_events_exist"`
// The state events requested.
// This list will be in an arbitrary order.
StateEvents []gomatrixserverlib.HeaderedEvent `json:"state_events"`
}
// QueryEventsByIDRequest is a request to QueryEventsByID
type QueryEventsByIDRequest struct {
// The event IDs to look up.
EventIDs []string `json:"event_ids"`
}
// QueryEventsByIDResponse is a response to QueryEventsByID
type QueryEventsByIDResponse struct {
// Copy of the request for debugging.
QueryEventsByIDRequest
// A list of events with the requested IDs.
// If the roomserver does not have a copy of a requested event
// then it will omit that event from the list.
// If the roomserver thinks it has a copy of the event, but
// fails to read it from the database then it will fail
// the entire request.
// This list will be in an arbitrary order.
Events []gomatrixserverlib.HeaderedEvent `json:"events"`
}
// QueryMembershipForUserRequest is a request to QueryMembership
type QueryMembershipForUserRequest struct {
// ID of the room to fetch membership from
RoomID string `json:"room_id"`
// ID of the user for whom membership is requested
UserID string `json:"user_id"`
}
// QueryMembershipForUserResponse is a response to QueryMembership
type QueryMembershipForUserResponse struct {
// The EventID of the latest "m.room.member" event for the sender,
// if HasBeenInRoom is true.
EventID string `json:"event_id"`
// True if the user has been in room before and has either stayed in it or left it.
HasBeenInRoom bool `json:"has_been_in_room"`
// True if the user is in room.
IsInRoom bool `json:"is_in_room"`
}
// QueryMembershipsForRoomRequest is a request to QueryMembershipsForRoom
type QueryMembershipsForRoomRequest struct {
// If true, only returns the membership events of "join" membership
JoinedOnly bool `json:"joined_only"`
// ID of the room to fetch memberships from
RoomID string `json:"room_id"`
// ID of the user sending the request
Sender string `json:"sender"`
}
// QueryMembershipsForRoomResponse is a response to QueryMembershipsForRoom
type QueryMembershipsForRoomResponse struct {
// The "m.room.member" events (of "join" membership) in the client format
JoinEvents []gomatrixserverlib.ClientEvent `json:"join_events"`
// True if the user has been in room before and has either stayed in it or
// left it.
HasBeenInRoom bool `json:"has_been_in_room"`
}
// QueryInvitesForUserRequest is a request to QueryInvitesForUser
type QueryInvitesForUserRequest struct {
// The room ID to look up invites in.
RoomID string `json:"room_id"`
// The User ID to look up invites for.
TargetUserID string `json:"target_user_id"`
}
// QueryInvitesForUserResponse is a response to QueryInvitesForUser
// This is used when accepting an invite or rejecting a invite to tell which
// remote matrix servers to contact.
type QueryInvitesForUserResponse struct {
// A list of matrix user IDs for each sender of an active invite targeting
// the requested user ID.
InviteSenderUserIDs []string `json:"invite_sender_user_ids"`
}
// QueryServerAllowedToSeeEventRequest is a request to QueryServerAllowedToSeeEvent
type QueryServerAllowedToSeeEventRequest struct {
// The event ID to look up invites in.
EventID string `json:"event_id"`
// The server interested in the event
ServerName gomatrixserverlib.ServerName `json:"server_name"`
}
// QueryServerAllowedToSeeEventResponse is a response to QueryServerAllowedToSeeEvent
type QueryServerAllowedToSeeEventResponse struct {
// Wether the server in question is allowed to see the event
AllowedToSeeEvent bool `json:"can_see_event"`
}
// QueryMissingEventsRequest is a request to QueryMissingEvents
type QueryMissingEventsRequest struct {
// Events which are known previous to the gap in the timeline.
EarliestEvents []string `json:"earliest_events"`
// Latest known events.
LatestEvents []string `json:"latest_events"`
// Limit the number of events this query returns.
Limit int `json:"limit"`
// The server interested in the event
ServerName gomatrixserverlib.ServerName `json:"server_name"`
}
// QueryMissingEventsResponse is a response to QueryMissingEvents
type QueryMissingEventsResponse struct {
// Missing events, arbritrary order.
Events []gomatrixserverlib.HeaderedEvent `json:"events"`
}
// QueryStateAndAuthChainRequest is a request to QueryStateAndAuthChain
type QueryStateAndAuthChainRequest struct {
// The room ID to query the state in.
RoomID string `json:"room_id"`
// The list of prev events for the event. Used to calculate the state at
// the event
PrevEventIDs []string `json:"prev_event_ids"`
// The list of auth events for the event. Used to calculate the auth chain
AuthEventIDs []string `json:"auth_event_ids"`
// Should state resolution be ran on the result events?
// TODO: check call sites and remove if we always want to do state res
ResolveState bool `json:"resolve_state"`
}
// QueryStateAndAuthChainResponse is a response to QueryStateAndAuthChain
type QueryStateAndAuthChainResponse struct {
// Copy of the request for debugging.
QueryStateAndAuthChainRequest
// Does the room exist on this roomserver?
// If the room doesn't exist this will be false and StateEvents will be empty.
RoomExists bool `json:"room_exists"`
// The room version of the room.
RoomVersion gomatrixserverlib.RoomVersion `json:"room_version"`
// Do all the previous events exist on this roomserver?
// If some of previous events do not exist this will be false and StateEvents will be empty.
PrevEventsExist bool `json:"prev_events_exist"`
// The state and auth chain events that were requested.
// The lists will be in an arbitrary order.
StateEvents []gomatrixserverlib.HeaderedEvent `json:"state_events"`
AuthChainEvents []gomatrixserverlib.HeaderedEvent `json:"auth_chain_events"`
}
// QueryBackfillRequest is a request to QueryBackfill.
type QueryBackfillRequest struct {
// The room to backfill
RoomID string `json:"room_id"`
// Events to start paginating from.
EarliestEventsIDs []string `json:"earliest_event_ids"`
// The maximum number of events to retrieve.
Limit int `json:"limit"`
// The server interested in the events.
ServerName gomatrixserverlib.ServerName `json:"server_name"`
}
// QueryBackfillResponse is a response to QueryBackfill.
type QueryBackfillResponse struct {
// Missing events, arbritrary order.
Events []gomatrixserverlib.HeaderedEvent `json:"events"`
}
// QueryRoomVersionCapabilitiesRequest asks for the default room version
type QueryRoomVersionCapabilitiesRequest struct{}
// QueryRoomVersionCapabilitiesResponse is a response to QueryRoomVersionCapabilitiesRequest
type QueryRoomVersionCapabilitiesResponse struct {
DefaultRoomVersion gomatrixserverlib.RoomVersion `json:"default"`
AvailableRoomVersions map[gomatrixserverlib.RoomVersion]string `json:"available"`
}
// QueryRoomVersionForRoomRequest asks for the room version for a given room.
type QueryRoomVersionForRoomRequest struct {
RoomID string `json:"room_id"`
}
// QueryRoomVersionForRoomResponse is a response to QueryRoomVersionForRoomRequest
type QueryRoomVersionForRoomResponse struct {
RoomVersion gomatrixserverlib.RoomVersion `json:"room_version"`
}
// RoomserverQueryAPI is used to query information from the room server.
type RoomserverQueryAPI interface {
// Query the latest events and state for a room from the room server.
QueryLatestEventsAndState(
ctx context.Context,
request *QueryLatestEventsAndStateRequest,
response *QueryLatestEventsAndStateResponse,
) error
// Query the state after a list of events in a room from the room server.
QueryStateAfterEvents(
ctx context.Context,
request *QueryStateAfterEventsRequest,
response *QueryStateAfterEventsResponse,
) error
// Query a list of events by event ID.
QueryEventsByID(
ctx context.Context,
request *QueryEventsByIDRequest,
response *QueryEventsByIDResponse,
) error
// Query the membership event for an user for a room.
QueryMembershipForUser(
ctx context.Context,
request *QueryMembershipForUserRequest,
response *QueryMembershipForUserResponse,
) error
// Query a list of membership events for a room
QueryMembershipsForRoom(
ctx context.Context,
request *QueryMembershipsForRoomRequest,
response *QueryMembershipsForRoomResponse,
) error
// Query a list of invite event senders for a user in a room.
QueryInvitesForUser(
ctx context.Context,
request *QueryInvitesForUserRequest,
response *QueryInvitesForUserResponse,
) error
// Query whether a server is allowed to see an event
QueryServerAllowedToSeeEvent(
ctx context.Context,
request *QueryServerAllowedToSeeEventRequest,
response *QueryServerAllowedToSeeEventResponse,
) error
// Query missing events for a room from roomserver
QueryMissingEvents(
ctx context.Context,
request *QueryMissingEventsRequest,
response *QueryMissingEventsResponse,
) error
// Query to get state and auth chain for a (potentially hypothetical) event.
// Takes lists of PrevEventIDs and AuthEventsIDs and uses them to calculate
// the state and auth chain to return.
QueryStateAndAuthChain(
ctx context.Context,
request *QueryStateAndAuthChainRequest,
response *QueryStateAndAuthChainResponse,
) error
// Query a given amount (or less) of events prior to a given set of events.
QueryBackfill(
ctx context.Context,
request *QueryBackfillRequest,
response *QueryBackfillResponse,
) error
// Asks for the default room version as preferred by the server.
QueryRoomVersionCapabilities(
ctx context.Context,
request *QueryRoomVersionCapabilitiesRequest,
response *QueryRoomVersionCapabilitiesResponse,
) error
// Asks for the room version for a given room.
QueryRoomVersionForRoom(
ctx context.Context,
request *QueryRoomVersionForRoomRequest,
response *QueryRoomVersionForRoomResponse,
) error
}
// RoomserverQueryLatestEventsAndStatePath is the HTTP path for the QueryLatestEventsAndState API.
const RoomserverQueryLatestEventsAndStatePath = "/api/roomserver/queryLatestEventsAndState"
// RoomserverQueryStateAfterEventsPath is the HTTP path for the QueryStateAfterEvents API.
const RoomserverQueryStateAfterEventsPath = "/api/roomserver/queryStateAfterEvents"
// RoomserverQueryEventsByIDPath is the HTTP path for the QueryEventsByID API.
const RoomserverQueryEventsByIDPath = "/api/roomserver/queryEventsByID"
// RoomserverQueryMembershipForUserPath is the HTTP path for the QueryMembershipForUser API.
const RoomserverQueryMembershipForUserPath = "/api/roomserver/queryMembershipForUser"
// RoomserverQueryMembershipsForRoomPath is the HTTP path for the QueryMembershipsForRoom API
const RoomserverQueryMembershipsForRoomPath = "/api/roomserver/queryMembershipsForRoom"
// RoomserverQueryInvitesForUserPath is the HTTP path for the QueryInvitesForUser API
const RoomserverQueryInvitesForUserPath = "/api/roomserver/queryInvitesForUser"
// RoomserverQueryServerAllowedToSeeEventPath is the HTTP path for the QueryServerAllowedToSeeEvent API
const RoomserverQueryServerAllowedToSeeEventPath = "/api/roomserver/queryServerAllowedToSeeEvent"
// RoomserverQueryMissingEventsPath is the HTTP path for the QueryMissingEvents API
const RoomserverQueryMissingEventsPath = "/api/roomserver/queryMissingEvents"
// RoomserverQueryStateAndAuthChainPath is the HTTP path for the QueryStateAndAuthChain API
const RoomserverQueryStateAndAuthChainPath = "/api/roomserver/queryStateAndAuthChain"
// RoomserverQueryBackfillPath is the HTTP path for the QueryBackfillPath API
const RoomserverQueryBackfillPath = "/api/roomserver/queryBackfill"
// RoomserverQueryRoomVersionCapabilitiesPath is the HTTP path for the QueryRoomVersionCapabilities API
const RoomserverQueryRoomVersionCapabilitiesPath = "/api/roomserver/queryRoomVersionCapabilities"
// RoomserverQueryRoomVersionForRoomPath is the HTTP path for the QueryRoomVersionForRoom API
const RoomserverQueryRoomVersionForRoomPath = "/api/roomserver/queryRoomVersionForRoom"
// NewRoomserverQueryAPIHTTP creates a RoomserverQueryAPI implemented by talking to a HTTP POST API.
// If httpClient is nil an error is returned
func NewRoomserverQueryAPIHTTP(roomserverURL string, httpClient *http.Client, cache caching.ImmutableCache) (RoomserverQueryAPI, error) {
if httpClient == nil {
return nil, errors.New("NewRoomserverQueryAPIHTTP: httpClient is <nil>")
}
return &httpRoomserverQueryAPI{roomserverURL, httpClient, cache}, nil
}
type httpRoomserverQueryAPI struct {
roomserverURL string
httpClient *http.Client
immutableCache caching.ImmutableCache
}
// QueryLatestEventsAndState implements RoomserverQueryAPI
func (h *httpRoomserverQueryAPI) QueryLatestEventsAndState(
ctx context.Context,
request *QueryLatestEventsAndStateRequest,
response *QueryLatestEventsAndStateResponse,
) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "QueryLatestEventsAndState")
defer span.Finish()
apiURL := h.roomserverURL + RoomserverQueryLatestEventsAndStatePath
return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
}
// QueryStateAfterEvents implements RoomserverQueryAPI
func (h *httpRoomserverQueryAPI) QueryStateAfterEvents(
ctx context.Context,
request *QueryStateAfterEventsRequest,
response *QueryStateAfterEventsResponse,
) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "QueryStateAfterEvents")
defer span.Finish()
apiURL := h.roomserverURL + RoomserverQueryStateAfterEventsPath
return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
}
// QueryEventsByID implements RoomserverQueryAPI
func (h *httpRoomserverQueryAPI) QueryEventsByID(
ctx context.Context,
request *QueryEventsByIDRequest,
response *QueryEventsByIDResponse,
) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "QueryEventsByID")
defer span.Finish()
apiURL := h.roomserverURL + RoomserverQueryEventsByIDPath
return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
}
// QueryMembershipForUser implements RoomserverQueryAPI
func (h *httpRoomserverQueryAPI) QueryMembershipForUser(
ctx context.Context,
request *QueryMembershipForUserRequest,
response *QueryMembershipForUserResponse,
) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "QueryMembershipForUser")
defer span.Finish()
apiURL := h.roomserverURL + RoomserverQueryMembershipForUserPath
return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
}
// QueryMembershipsForRoom implements RoomserverQueryAPI
func (h *httpRoomserverQueryAPI) QueryMembershipsForRoom(
ctx context.Context,
request *QueryMembershipsForRoomRequest,
response *QueryMembershipsForRoomResponse,
) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "QueryMembershipsForRoom")
defer span.Finish()
apiURL := h.roomserverURL + RoomserverQueryMembershipsForRoomPath
return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
}
// QueryInvitesForUser implements RoomserverQueryAPI
func (h *httpRoomserverQueryAPI) QueryInvitesForUser(
ctx context.Context,
request *QueryInvitesForUserRequest,
response *QueryInvitesForUserResponse,
) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "QueryInvitesForUser")
defer span.Finish()
apiURL := h.roomserverURL + RoomserverQueryInvitesForUserPath
return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
}
// QueryServerAllowedToSeeEvent implements RoomserverQueryAPI
func (h *httpRoomserverQueryAPI) QueryServerAllowedToSeeEvent(
ctx context.Context,
request *QueryServerAllowedToSeeEventRequest,
response *QueryServerAllowedToSeeEventResponse,
) (err error) {
span, ctx := opentracing.StartSpanFromContext(ctx, "QueryServerAllowedToSeeEvent")
defer span.Finish()
apiURL := h.roomserverURL + RoomserverQueryServerAllowedToSeeEventPath
return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
}
// QueryMissingEvents implements RoomServerQueryAPI
func (h *httpRoomserverQueryAPI) QueryMissingEvents(
ctx context.Context,
request *QueryMissingEventsRequest,
response *QueryMissingEventsResponse,
) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "QueryMissingEvents")
defer span.Finish()
apiURL := h.roomserverURL + RoomserverQueryMissingEventsPath
return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
}
// QueryStateAndAuthChain implements RoomserverQueryAPI
func (h *httpRoomserverQueryAPI) QueryStateAndAuthChain(
ctx context.Context,
request *QueryStateAndAuthChainRequest,
response *QueryStateAndAuthChainResponse,
) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "QueryStateAndAuthChain")
defer span.Finish()
apiURL := h.roomserverURL + RoomserverQueryStateAndAuthChainPath
return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
}
// QueryBackfill implements RoomServerQueryAPI
func (h *httpRoomserverQueryAPI) QueryBackfill(
ctx context.Context,
request *QueryBackfillRequest,
response *QueryBackfillResponse,
) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "QueryBackfill")
defer span.Finish()
apiURL := h.roomserverURL + RoomserverQueryBackfillPath
return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
}
// QueryRoomVersionCapabilities implements RoomServerQueryAPI
func (h *httpRoomserverQueryAPI) QueryRoomVersionCapabilities(
ctx context.Context,
request *QueryRoomVersionCapabilitiesRequest,
response *QueryRoomVersionCapabilitiesResponse,
) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "QueryRoomVersionCapabilities")
defer span.Finish()
apiURL := h.roomserverURL + RoomserverQueryRoomVersionCapabilitiesPath
return commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
}
// QueryRoomVersionForRoom implements RoomServerQueryAPI
func (h *httpRoomserverQueryAPI) QueryRoomVersionForRoom(
ctx context.Context,
request *QueryRoomVersionForRoomRequest,
response *QueryRoomVersionForRoomResponse,
) error {
if roomVersion, ok := h.immutableCache.GetRoomVersion(request.RoomID); ok {
response.RoomVersion = roomVersion
return nil
}
span, ctx := opentracing.StartSpanFromContext(ctx, "QueryRoomVersionForRoom")
defer span.Finish()
apiURL := h.roomserverURL + RoomserverQueryRoomVersionForRoomPath
err := commonHTTP.PostJSON(ctx, span, h.httpClient, apiURL, request, response)
if err == nil {
h.immutableCache.StoreRoomVersion(request.RoomID, response.RoomVersion)
}
return err
}