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// 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 sync
import (
"database/sql"
"encoding/json"
"fmt"
"math"
"net/http"
"strconv"
"time"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
"github.com/sirupsen/logrus"
"github.com/matrix-org/dendrite/syncapi/storage"
"github.com/matrix-org/dendrite/syncapi/types"
userapi "github.com/matrix-org/dendrite/userapi/api"
)
const defaultSyncTimeout = time.Duration(0)
const DefaultTimelineLimit = 20
func newSyncRequest(req *http.Request, device userapi.Device, syncDB storage.Database) (*types.SyncRequest, error) {
timeout := getTimeout(req.URL.Query().Get("timeout"))
fullState := req.URL.Query().Get("full_state")
wantFullState := fullState != "" && fullState != "false"
since, sinceStr := types.StreamingToken{}, req.URL.Query().Get("since")
if sinceStr != "" {
var err error
since, err = types.NewStreamTokenFromString(sinceStr)
if err != nil {
return nil, err
}
}
// Create a default filter and apply a stored filter on top of it (if specified)
filter := gomatrixserverlib.DefaultFilter()
filterQuery := req.URL.Query().Get("filter")
if filterQuery != "" {
if filterQuery[0] == '{' {
// Parse the filter from the query string
if err := json.Unmarshal([]byte(filterQuery), &filter); err != nil {
return nil, fmt.Errorf("json.Unmarshal: %w", err)
}
} else {
// Try to load the filter from the database
localpart, _, err := gomatrixserverlib.SplitID('@', device.UserID)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("gomatrixserverlib.SplitID failed")
return nil, fmt.Errorf("gomatrixserverlib.SplitID: %w", err)
}
if err := syncDB.GetFilter(req.Context(), &filter, localpart, filterQuery); err != nil && err != sql.ErrNoRows {
util.GetLogger(req.Context()).WithError(err).Error("syncDB.GetFilter failed")
return nil, fmt.Errorf("syncDB.GetFilter: %w", err)
}
}
}
// A loaded filter might have overwritten these values,
// so set them after loading the filter.
if since.IsEmpty() {
// Send as much account data down for complete syncs as possible
// by default, otherwise clients do weird things while waiting
// for the rest of the data to trickle down.
filter.AccountData.Limit = math.MaxInt32
filter.Room.AccountData.Limit = math.MaxInt32
filter.Room.State.Limit = math.MaxInt32
}
logger := util.GetLogger(req.Context()).WithFields(logrus.Fields{
"user_id": device.UserID,
"device_id": device.ID,
"since": since,
"timeout": timeout,
"limit": filter.Room.Timeline.Limit,
})
return &types.SyncRequest{
Context: req.Context(), //
Log: logger, //
Device: &device, //
Response: types.NewResponse(), // Populated by all streams
Filter: filter, //
Since: since, //
Timeout: timeout, //
Rooms: make(map[string]string), // Populated by the PDU stream
WantFullState: wantFullState, //
}, nil
}
func getTimeout(timeoutMS string) time.Duration {
if timeoutMS == "" {
return defaultSyncTimeout
}
i, err := strconv.Atoi(timeoutMS)
if err != nil {
return defaultSyncTimeout
}
return time.Duration(i) * time.Millisecond
}
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