gotosocial/internal/db/bundb/errors.go

104 lines
3 KiB
Go

// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package bundb
import (
"database/sql/driver"
"errors"
"github.com/jackc/pgx/v5/pgconn"
"github.com/superseriousbusiness/gotosocial/internal/db"
"modernc.org/sqlite"
sqlite3 "modernc.org/sqlite/lib"
)
// errBusy is a sentinel error indicating
// busy database (e.g. retry needed).
var errBusy = errors.New("busy")
// processPostgresError processes an error, replacing any postgres specific errors with our own error type
func processPostgresError(err error) error {
// Catch nil errs.
if err == nil {
return nil
}
// Attempt to cast as postgres
pgErr, ok := err.(*pgconn.PgError)
if !ok {
return err
}
// Handle supplied error code:
// (https://www.postgresql.org/docs/10/errcodes-appendix.html)
switch pgErr.Code { //nolint
case "23505" /* unique_violation */ :
return db.ErrAlreadyExists
}
return err
}
// processSQLiteError processes an error, replacing any sqlite specific errors with our own error type
func processSQLiteError(err error) error {
// Catch nil errs.
if err == nil {
return nil
}
// Attempt to cast as sqlite
sqliteErr, ok := err.(*sqlite.Error)
if !ok {
return err
}
// Handle supplied error code:
switch sqliteErr.Code() {
case sqlite3.SQLITE_CONSTRAINT_UNIQUE,
sqlite3.SQLITE_CONSTRAINT_PRIMARYKEY:
return db.ErrAlreadyExists
case sqlite3.SQLITE_BUSY:
return errBusy
case sqlite3.SQLITE_BUSY_TIMEOUT:
return db.ErrBusyTimeout
// WORKAROUND:
// text copied from matrix dev chat:
//
// okay i've found a workaround for now. so between
// v1.29.0 and v1.29.2 (modernc.org/sqlite) is that
// slightly tweaked interruptOnDone() behaviour, which
// causes interrupt to (imo, correctly) get called when
// a context is cancelled to cancel the running query. the
// issue is that every single query after that point seems
// to still then return interrupted. so as you thought,
// maybe that query count isn't being decremented. i don't
// think it's our code, but i haven't ruled it out yet.
//
// the workaround for now is adding to our sqlite error
// processor to replace an SQLITE_INTERRUPTED code with
// driver.ErrBadConn, which hints to the golang sql package
// that the conn needs to be closed and a new one opened
//
case sqlite3.SQLITE_INTERRUPT:
return driver.ErrBadConn
}
return err
}