use go module for dependencies (#594)

syncapi/routing/routing.go

@@ -0,0 +1,61 @@
+// Copyright 2017 Vector Creations Ltd
+//
+// 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 routing
+
+import (
+	"net/http"
+
+	"github.com/gorilla/mux"
+	"github.com/matrix-org/dendrite/clientapi/auth"
+	"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
+	"github.com/matrix-org/dendrite/clientapi/auth/storage/devices"
+	"github.com/matrix-org/dendrite/common"
+	"github.com/matrix-org/dendrite/syncapi/storage"
+	"github.com/matrix-org/dendrite/syncapi/sync"
+	"github.com/matrix-org/util"
+)
+
+const pathPrefixR0 = "/_matrix/client/r0"
+
+// Setup configures the given mux with sync-server listeners
+func Setup(apiMux *mux.Router, srp *sync.RequestPool, syncDB *storage.SyncServerDatabase, deviceDB *devices.Database) {
+	r0mux := apiMux.PathPrefix(pathPrefixR0).Subrouter()
+
+	authData := auth.Data{
+		AccountDB:   nil,
+		DeviceDB:    deviceDB,
+		AppServices: nil,
+	}
+
+	// TODO: Add AS support for all handlers below.
+	r0mux.Handle("/sync", common.MakeAuthAPI("sync", authData, func(req *http.Request, device *authtypes.Device) util.JSONResponse {
+		return srp.OnIncomingSyncRequest(req, device)
+	})).Methods(http.MethodGet, http.MethodOptions)
+
+	r0mux.Handle("/rooms/{roomID}/state", common.MakeAuthAPI("room_state", authData, func(req *http.Request, device *authtypes.Device) util.JSONResponse {
+		vars := mux.Vars(req)
+		return OnIncomingStateRequest(req, syncDB, vars["roomID"])
+	})).Methods(http.MethodGet, http.MethodOptions)
+
+	r0mux.Handle("/rooms/{roomID}/state/{type}", common.MakeAuthAPI("room_state", authData, func(req *http.Request, device *authtypes.Device) util.JSONResponse {
+		vars := mux.Vars(req)
+		return OnIncomingStateTypeRequest(req, syncDB, vars["roomID"], vars["type"], "")
+	})).Methods(http.MethodGet, http.MethodOptions)
+
+	r0mux.Handle("/rooms/{roomID}/state/{type}/{stateKey}", common.MakeAuthAPI("room_state", authData, func(req *http.Request, device *authtypes.Device) util.JSONResponse {
+		vars := mux.Vars(req)
+		return OnIncomingStateTypeRequest(req, syncDB, vars["roomID"], vars["type"], vars["stateKey"])
+	})).Methods(http.MethodGet, http.MethodOptions)
+}

syncapi/routing/state.go

@@ -0,0 +1,118 @@
+// Copyright 2017 Vector Creations Ltd
+//
+// 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 routing
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/matrix-org/dendrite/clientapi/httputil"
+	"github.com/matrix-org/dendrite/clientapi/jsonerror"
+	"github.com/matrix-org/dendrite/syncapi/storage"
+	"github.com/matrix-org/dendrite/syncapi/types"
+	"github.com/matrix-org/gomatrixserverlib"
+	"github.com/matrix-org/util"
+	log "github.com/sirupsen/logrus"
+)
+
+type stateEventInStateResp struct {
+	gomatrixserverlib.ClientEvent
+	PrevContent   json.RawMessage `json:"prev_content,omitempty"`
+	ReplacesState string          `json:"replaces_state,omitempty"`
+}
+
+// OnIncomingStateRequest is called when a client makes a /rooms/{roomID}/state
+// request. It will fetch all the state events from the specified room and will
+// append the necessary keys to them if applicable before returning them.
+// Returns an error if something went wrong in the process.
+// TODO: Check if the user is in the room. If not, check if the room's history
+// is publicly visible. Current behaviour is returning an empty array if the
+// user cannot see the room's history.
+func OnIncomingStateRequest(req *http.Request, db *storage.SyncServerDatabase, roomID string) util.JSONResponse {
+	// TODO(#287): Auth request and handle the case where the user has left (where
+	// we should return the state at the poin they left)
+
+	stateEvents, err := db.GetStateEventsForRoom(req.Context(), roomID)
+	if err != nil {
+		return httputil.LogThenError(req, err)
+	}
+
+	resp := []stateEventInStateResp{}
+	// Fill the prev_content and replaces_state keys if necessary
+	for _, event := range stateEvents {
+		stateEvent := stateEventInStateResp{
+			ClientEvent: gomatrixserverlib.ToClientEvent(event, gomatrixserverlib.FormatAll),
+		}
+		var prevEventRef types.PrevEventRef
+		if len(event.Unsigned()) > 0 {
+			if err := json.Unmarshal(event.Unsigned(), &prevEventRef); err != nil {
+				return httputil.LogThenError(req, err)
+			}
+			// Fills the previous state event ID if the state event replaces another
+			// state event
+			if len(prevEventRef.ReplacesState) > 0 {
+				stateEvent.ReplacesState = prevEventRef.ReplacesState
+			}
+			// Fill the previous event if the state event references a previous event
+			if prevEventRef.PrevContent != nil {
+				stateEvent.PrevContent = prevEventRef.PrevContent
+			}
+		}
+
+		resp = append(resp, stateEvent)
+	}
+
+	return util.JSONResponse{
+		Code: http.StatusOK,
+		JSON: resp,
+	}
+}
+
+// OnIncomingStateTypeRequest is called when a client makes a
+// /rooms/{roomID}/state/{type}/{statekey} request. It will look in current
+// state to see if there is an event with that type and state key, if there
+// is then (by default) we return the content, otherwise a 404.
+func OnIncomingStateTypeRequest(req *http.Request, db *storage.SyncServerDatabase, roomID string, evType, stateKey string) util.JSONResponse {
+	// TODO(#287): Auth request and handle the case where the user has left (where
+	// we should return the state at the poin they left)
+
+	logger := util.GetLogger(req.Context())
+	logger.WithFields(log.Fields{
+		"roomID":   roomID,
+		"evType":   evType,
+		"stateKey": stateKey,
+	}).Info("Fetching state")
+
+	event, err := db.GetStateEvent(req.Context(), roomID, evType, stateKey)
+	if err != nil {
+		return httputil.LogThenError(req, err)
+	}
+
+	if event == nil {
+		return util.JSONResponse{
+			Code: http.StatusNotFound,
+			JSON: jsonerror.NotFound("cannot find state"),
+		}
+	}
+
+	stateEvent := stateEventInStateResp{
+		ClientEvent: gomatrixserverlib.ToClientEvent(*event, gomatrixserverlib.FormatAll),
+	}
+
+	return util.JSONResponse{
+		Code: http.StatusOK,
+		JSON: stateEvent.Content,
+	}
+}