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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 (
"context"
"encoding/json"
"net/http"
"strconv"
"time"
"github.com/matrix-org/dendrite/syncapi/storage"
"github.com/matrix-org/dendrite/syncapi/types"
userapi "github.com/matrix-org/dendrite/userapi/api"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
log "github.com/sirupsen/logrus"
)
const defaultSyncTimeout = time.Duration(0)
const DefaultTimelineLimit = 20
type filter struct {
Room struct {
Timeline struct {
Limit *int `json:"limit"`
} `json:"timeline"`
} `json:"room"`
}
// syncRequest represents a /sync request, with sensible defaults/sanity checks applied.
type syncRequest struct {
ctx context.Context
device userapi.Device
limit int
timeout time.Duration
since *types.StreamingToken // nil means that no since token was supplied
wantFullState bool
log *log.Entry
}
func newSyncRequest(req *http.Request, device userapi.Device, syncDB storage.Database) (*syncRequest, error) {
timeout := getTimeout(req.URL.Query().Get("timeout"))
fullState := req.URL.Query().Get("full_state")
wantFullState := fullState != "" && fullState != "false"
var since *types.StreamingToken
sinceStr := req.URL.Query().Get("since")
if sinceStr != "" {
tok, err := types.NewStreamTokenFromString(sinceStr)
if err != nil {
return nil, err
}
since = &tok
}
if since == nil {
since = &types.StreamingToken{}
}
timelineLimit := DefaultTimelineLimit
// TODO: read from stored filters too
filterQuery := req.URL.Query().Get("filter")
if filterQuery != "" {
if filterQuery[0] == '{' {
// attempt to parse the timeline limit at least
var f filter
err := json.Unmarshal([]byte(filterQuery), &f)
if err == nil && f.Room.Timeline.Limit != nil {
timelineLimit = *f.Room.Timeline.Limit
}
} else {
// attempt to load the filter ID
localpart, _, err := gomatrixserverlib.SplitID('@', device.UserID)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("gomatrixserverlib.SplitID failed")
return nil, err
}
f, err := syncDB.GetFilter(req.Context(), localpart, filterQuery)
if err == nil {
timelineLimit = f.Room.Timeline.Limit
}
}
}
// TODO: Additional query params: set_presence, filter
return &syncRequest{
ctx: req.Context(),
device: device,
timeout: timeout,
since: since,
wantFullState: wantFullState,
limit: timelineLimit,
log: util.GetLogger(req.Context()),
}, 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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