121 lines
4.0 KiB
Go
121 lines
4.0 KiB
Go
// Copyright 2017 Vector Creations Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package writers
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import (
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"net/http"
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"fmt"
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"time"
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"github.com/matrix-org/dendrite/clientapi/auth"
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"github.com/matrix-org/dendrite/clientapi/config"
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"github.com/matrix-org/dendrite/clientapi/httputil"
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"github.com/matrix-org/dendrite/clientapi/jsonerror"
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"github.com/matrix-org/dendrite/clientapi/producers"
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"github.com/matrix-org/dendrite/roomserver/api"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/matrix-org/util"
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)
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// http://matrix.org/docs/spec/client_server/r0.2.0.html#put-matrix-client-r0-rooms-roomid-send-eventtype-txnid
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// http://matrix.org/docs/spec/client_server/r0.2.0.html#put-matrix-client-r0-rooms-roomid-state-eventtype-statekey
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type sendEventResponse struct {
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EventID string `json:"event_id"`
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}
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// SendEvent implements:
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// /rooms/{roomID}/send/{eventType}/{txnID}
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// /rooms/{roomID}/state/{eventType}/{stateKey}
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func SendEvent(req *http.Request, roomID, eventType, txnID string, stateKey *string, cfg config.ClientAPI, queryAPI api.RoomserverQueryAPI, producer *producers.RoomserverProducer) util.JSONResponse {
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// parse the incoming http request
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userID, resErr := auth.VerifyAccessToken(req)
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if resErr != nil {
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return *resErr
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}
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var r map[string]interface{} // must be a JSON object
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resErr = httputil.UnmarshalJSONRequest(req, &r)
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if resErr != nil {
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return *resErr
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}
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// create the new event and set all the fields we can
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builder := gomatrixserverlib.EventBuilder{
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Sender: userID,
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RoomID: roomID,
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Type: eventType,
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StateKey: stateKey,
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}
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builder.SetContent(r)
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// work out what will be required in order to send this event
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needed, err := gomatrixserverlib.StateNeededForEventBuilder(&builder)
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if err != nil {
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return httputil.LogThenError(req, err)
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}
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// Ask the roomserver for information about this room
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queryReq := api.QueryLatestEventsAndStateRequest{
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RoomID: roomID,
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StateToFetch: needed.Tuples(),
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}
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var queryRes api.QueryLatestEventsAndStateResponse
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if queryErr := queryAPI.QueryLatestEventsAndState(&queryReq, &queryRes); queryErr != nil {
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return httputil.LogThenError(req, queryErr)
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}
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if !queryRes.RoomExists {
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return util.JSONResponse{
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Code: 404,
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JSON: jsonerror.NotFound("Room does not exist"),
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}
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}
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// set the fields we previously couldn't do and build the event
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builder.PrevEvents = queryRes.LatestEvents // the current events will be the prev events of the new event
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var refs []gomatrixserverlib.EventReference
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for _, e := range queryRes.StateEvents {
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refs = append(refs, e.EventReference())
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}
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builder.AuthEvents = refs
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eventID := fmt.Sprintf("$%s:%s", util.RandomString(16), cfg.ServerName)
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e, err := builder.Build(eventID, time.Now(), cfg.ServerName, cfg.KeyID, cfg.PrivateKey)
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if err != nil {
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return httputil.LogThenError(req, err)
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}
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// check to see if this user can perform this operation
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stateEvents := make([]*gomatrixserverlib.Event, len(queryRes.StateEvents))
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for i := range queryRes.StateEvents {
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stateEvents[i] = &queryRes.StateEvents[i]
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}
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provider := gomatrixserverlib.NewAuthEvents(stateEvents)
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if err = gomatrixserverlib.Allowed(e, &provider); err != nil {
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return util.JSONResponse{
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Code: 403,
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JSON: jsonerror.Forbidden(err.Error()), // TODO: Is this error string comprehensible to the client?
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}
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}
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// pass the new event to the roomserver
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if err := producer.SendEvents([]gomatrixserverlib.Event{e}); err != nil {
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return httputil.LogThenError(req, err)
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}
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return util.JSONResponse{
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Code: 200,
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JSON: sendEventResponse{e.EventID()},
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}
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}
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