mirror of
https://github.com/matrix-org/dendrite
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* Offset updates take place using TransactionWriter * Refactor TransactionWriter in current state server * Refactor TransactionWriter in federation sender * Refactor TransactionWriter in key server * Refactor TransactionWriter in media API * Refactor TransactionWriter in server key API * Refactor TransactionWriter in sync API * Refactor TransactionWriter in user API * Fix deadlocking Sync API tests * Un-deadlock device database * Fix appservice API * Rename TransactionWriters to Writers * Move writers up a layer in sync API * Document sqlutil.Writer interface * Add note to Writer documentation
171 lines
5.4 KiB
Go
171 lines
5.4 KiB
Go
// Copyright 2017-2018 New Vector Ltd
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// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
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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 sqlite3
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import (
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"context"
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"database/sql"
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"time"
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"github.com/matrix-org/dendrite/internal"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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"github.com/matrix-org/dendrite/mediaapi/types"
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"github.com/matrix-org/gomatrixserverlib"
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)
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const thumbnailSchema = `
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-- The mediaapi_thumbnail table holds metadata for each thumbnail file stored and accessible to the local server,
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-- the actual file is stored separately.
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CREATE TABLE IF NOT EXISTS mediaapi_thumbnail (
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media_id TEXT NOT NULL,
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media_origin TEXT NOT NULL,
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content_type TEXT NOT NULL,
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file_size_bytes INTEGER NOT NULL,
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creation_ts INTEGER NOT NULL,
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width INTEGER NOT NULL,
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height INTEGER NOT NULL,
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resize_method TEXT NOT NULL
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);
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CREATE UNIQUE INDEX IF NOT EXISTS mediaapi_thumbnail_index ON mediaapi_thumbnail (media_id, media_origin, width, height, resize_method);
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`
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const insertThumbnailSQL = `
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INSERT INTO mediaapi_thumbnail (media_id, media_origin, content_type, file_size_bytes, creation_ts, width, height, resize_method)
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VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
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`
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// Note: this selects one specific thumbnail
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const selectThumbnailSQL = `
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SELECT content_type, file_size_bytes, creation_ts FROM mediaapi_thumbnail WHERE media_id = $1 AND media_origin = $2 AND width = $3 AND height = $4 AND resize_method = $5
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`
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// Note: this selects all thumbnails for a media_origin and media_id
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const selectThumbnailsSQL = `
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SELECT content_type, file_size_bytes, creation_ts, width, height, resize_method FROM mediaapi_thumbnail WHERE media_id = $1 AND media_origin = $2
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`
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type thumbnailStatements struct {
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db *sql.DB
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writer sqlutil.Writer
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insertThumbnailStmt *sql.Stmt
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selectThumbnailStmt *sql.Stmt
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selectThumbnailsStmt *sql.Stmt
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}
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func (s *thumbnailStatements) prepare(db *sql.DB, writer sqlutil.Writer) (err error) {
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_, err = db.Exec(thumbnailSchema)
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if err != nil {
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return
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}
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s.db = db
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s.writer = writer
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return statementList{
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{&s.insertThumbnailStmt, insertThumbnailSQL},
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{&s.selectThumbnailStmt, selectThumbnailSQL},
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{&s.selectThumbnailsStmt, selectThumbnailsSQL},
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}.prepare(db)
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}
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func (s *thumbnailStatements) insertThumbnail(
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ctx context.Context, thumbnailMetadata *types.ThumbnailMetadata,
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) error {
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thumbnailMetadata.MediaMetadata.CreationTimestamp = types.UnixMs(time.Now().UnixNano() / 1000000)
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return s.writer.Do(s.db, nil, func(txn *sql.Tx) error {
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stmt := sqlutil.TxStmt(txn, s.insertThumbnailStmt)
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_, err := stmt.ExecContext(
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ctx,
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thumbnailMetadata.MediaMetadata.MediaID,
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thumbnailMetadata.MediaMetadata.Origin,
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thumbnailMetadata.MediaMetadata.ContentType,
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thumbnailMetadata.MediaMetadata.FileSizeBytes,
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thumbnailMetadata.MediaMetadata.CreationTimestamp,
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thumbnailMetadata.ThumbnailSize.Width,
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thumbnailMetadata.ThumbnailSize.Height,
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thumbnailMetadata.ThumbnailSize.ResizeMethod,
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)
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return err
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})
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}
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func (s *thumbnailStatements) selectThumbnail(
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ctx context.Context,
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mediaID types.MediaID,
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mediaOrigin gomatrixserverlib.ServerName,
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width, height int,
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resizeMethod string,
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) (*types.ThumbnailMetadata, error) {
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thumbnailMetadata := types.ThumbnailMetadata{
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MediaMetadata: &types.MediaMetadata{
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MediaID: mediaID,
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Origin: mediaOrigin,
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},
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ThumbnailSize: types.ThumbnailSize{
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Width: width,
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Height: height,
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ResizeMethod: resizeMethod,
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},
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}
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err := s.selectThumbnailStmt.QueryRowContext(
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ctx,
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thumbnailMetadata.MediaMetadata.MediaID,
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thumbnailMetadata.MediaMetadata.Origin,
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thumbnailMetadata.ThumbnailSize.Width,
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thumbnailMetadata.ThumbnailSize.Height,
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thumbnailMetadata.ThumbnailSize.ResizeMethod,
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).Scan(
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&thumbnailMetadata.MediaMetadata.ContentType,
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&thumbnailMetadata.MediaMetadata.FileSizeBytes,
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&thumbnailMetadata.MediaMetadata.CreationTimestamp,
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)
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return &thumbnailMetadata, err
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}
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func (s *thumbnailStatements) selectThumbnails(
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ctx context.Context, mediaID types.MediaID, mediaOrigin gomatrixserverlib.ServerName,
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) ([]*types.ThumbnailMetadata, error) {
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rows, err := s.selectThumbnailsStmt.QueryContext(
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ctx, mediaID, mediaOrigin,
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)
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if err != nil {
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return nil, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "selectThumbnails: rows.close() failed")
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var thumbnails []*types.ThumbnailMetadata
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for rows.Next() {
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thumbnailMetadata := types.ThumbnailMetadata{
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MediaMetadata: &types.MediaMetadata{
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MediaID: mediaID,
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Origin: mediaOrigin,
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},
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}
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err = rows.Scan(
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&thumbnailMetadata.MediaMetadata.ContentType,
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&thumbnailMetadata.MediaMetadata.FileSizeBytes,
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&thumbnailMetadata.MediaMetadata.CreationTimestamp,
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&thumbnailMetadata.ThumbnailSize.Width,
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&thumbnailMetadata.ThumbnailSize.Height,
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&thumbnailMetadata.ThumbnailSize.ResizeMethod,
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)
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if err != nil {
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return nil, err
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}
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thumbnails = append(thumbnails, &thumbnailMetadata)
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}
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return thumbnails, rows.Err()
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}
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