114 lines
3.5 KiB
Go
114 lines
3.5 KiB
Go
// Copyright 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 sqlite3
|
|
|
|
import (
|
|
"context"
|
|
"database/sql"
|
|
|
|
"github.com/matrix-org/dendrite/internal/sqlutil"
|
|
"github.com/matrix-org/gomatrixserverlib"
|
|
)
|
|
|
|
const blacklistSchema = `
|
|
CREATE TABLE IF NOT EXISTS federationsender_blacklist (
|
|
-- The blacklisted server name
|
|
server_name TEXT NOT NULL,
|
|
UNIQUE (server_name)
|
|
);
|
|
`
|
|
|
|
const insertBlacklistSQL = "" +
|
|
"INSERT INTO federationsender_blacklist (server_name) VALUES ($1)" +
|
|
" ON CONFLICT DO NOTHING"
|
|
|
|
const selectBlacklistSQL = "" +
|
|
"SELECT server_name FROM federationsender_blacklist WHERE server_name = $1"
|
|
|
|
const deleteBlacklistSQL = "" +
|
|
"DELETE FROM federationsender_blacklist WHERE server_name = $1"
|
|
|
|
type blacklistStatements struct {
|
|
db *sql.DB
|
|
writer sqlutil.TransactionWriter
|
|
insertBlacklistStmt *sql.Stmt
|
|
selectBlacklistStmt *sql.Stmt
|
|
deleteBlacklistStmt *sql.Stmt
|
|
}
|
|
|
|
func NewSQLiteBlacklistTable(db *sql.DB) (s *blacklistStatements, err error) {
|
|
s = &blacklistStatements{
|
|
db: db,
|
|
writer: sqlutil.NewTransactionWriter(),
|
|
}
|
|
_, err = db.Exec(blacklistSchema)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
if s.insertBlacklistStmt, err = db.Prepare(insertBlacklistSQL); err != nil {
|
|
return
|
|
}
|
|
if s.selectBlacklistStmt, err = db.Prepare(selectBlacklistSQL); err != nil {
|
|
return
|
|
}
|
|
if s.deleteBlacklistStmt, err = db.Prepare(deleteBlacklistSQL); err != nil {
|
|
return
|
|
}
|
|
return
|
|
}
|
|
|
|
// insertRoom inserts the room if it didn't already exist.
|
|
// If the room didn't exist then last_event_id is set to the empty string.
|
|
func (s *blacklistStatements) InsertBlacklist(
|
|
ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
|
|
) error {
|
|
return s.writer.Do(s.db, txn, func(txn *sql.Tx) error {
|
|
stmt := sqlutil.TxStmt(txn, s.insertBlacklistStmt)
|
|
_, err := stmt.ExecContext(ctx, serverName)
|
|
return err
|
|
})
|
|
}
|
|
|
|
// selectRoomForUpdate locks the row for the room and returns the last_event_id.
|
|
// The row must already exist in the table. Callers can ensure that the row
|
|
// exists by calling insertRoom first.
|
|
func (s *blacklistStatements) SelectBlacklist(
|
|
ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
|
|
) (bool, error) {
|
|
stmt := sqlutil.TxStmt(txn, s.selectBlacklistStmt)
|
|
res, err := stmt.QueryContext(ctx, serverName)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
defer res.Close() // nolint:errcheck
|
|
// The query will return the server name if the server is blacklisted, and
|
|
// will return no rows if not. By calling Next, we find out if a row was
|
|
// returned or not - we don't care about the value itself.
|
|
return res.Next(), nil
|
|
}
|
|
|
|
// updateRoom updates the last_event_id for the room. selectRoomForUpdate should
|
|
// have already been called earlier within the transaction.
|
|
func (s *blacklistStatements) DeleteBlacklist(
|
|
ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
|
|
) error {
|
|
return s.writer.Do(s.db, txn, func(txn *sql.Tx) error {
|
|
stmt := sqlutil.TxStmt(txn, s.deleteBlacklistStmt)
|
|
_, err := stmt.ExecContext(ctx, serverName)
|
|
return err
|
|
})
|
|
}
|