vikunja-api/pkg/db/db.go

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// Vikunja is a to-do list application to facilitate your life.
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// Copyright 2018-2020 Vikunja and contributors. All rights reserved.
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//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
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//
// 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 General Public License for more details.
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//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package db
import (
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"encoding/gob"
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"fmt"
"net/url"
"os"
"strconv"
"strings"
"time"
"code.vikunja.io/api/pkg/config"
"code.vikunja.io/api/pkg/log"
xrc "gitea.com/xorm/xorm-redis-cache"
"xorm.io/core"
"xorm.io/xorm"
"xorm.io/xorm/caches"
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_ "github.com/go-sql-driver/mysql" // Because.
_ "github.com/lib/pq" // Because.
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_ "github.com/mattn/go-sqlite3" // Because.
)
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// We only want one instance of the engine, so we can reate it once and reuse it
var x *xorm.Engine
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// CreateDBEngine initializes a db engine from the config
func CreateDBEngine() (engine *xorm.Engine, err error) {
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if x != nil {
return x, nil
}
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// If the database type is not set, this likely means we need to initialize the config first
if config.DatabaseType.GetString() == "" {
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config.InitConfig()
}
// Use Mysql if set
switch config.DatabaseType.GetString() {
case "mysql":
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engine, err = initMysqlEngine()
if err != nil {
return
}
case "postgres":
engine, err = initPostgresEngine()
if err != nil {
return
}
case "sqlite":
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// Otherwise use sqlite
engine, err = initSqliteEngine()
if err != nil {
return
}
default:
log.Fatalf("Unknown database type %s", config.DatabaseType.GetString())
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}
engine.SetTZLocation(config.GetTimeZone()) // Vikunja's timezone
loc, err := time.LoadLocation("GMT") // The db data timezone
if err != nil {
log.Fatalf("Error parsing time zone: %s", err)
}
engine.SetTZDatabase(loc)
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engine.SetMapper(core.GonicMapper{})
logger := log.NewXormLogger("")
engine.SetLogger(logger)
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// Cache
// We have to initialize the cache here to avoid import cycles
if config.CacheEnabled.GetBool() {
switch config.CacheType.GetString() {
case "memory":
cacher := caches.NewLRUCacher(caches.NewMemoryStore(), config.CacheMaxElementSize.GetInt())
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engine.SetDefaultCacher(cacher)
case "redis":
cacher := xrc.NewRedisCacher(config.RedisHost.GetString(), config.RedisPassword.GetString(), xrc.DEFAULT_EXPIRATION, engine.Logger())
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engine.SetDefaultCacher(cacher)
default:
log.Info("Did not find a valid cache type. Caching disabled. Please refer to the docs for poosible cache types.")
}
}
x = engine
return
}
// RegisterTableStructsForCache registers tables in gob encoding for redis cache
func RegisterTableStructsForCache(val interface{}) {
gob.Register(val)
}
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func initMysqlEngine() (engine *xorm.Engine, err error) {
// We're using utf8mb here instead of just utf8 because we want to use non-BMP characters.
// See https://stackoverflow.com/a/30074553/10924593 for more info.
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connStr := fmt.Sprintf(
"%s:%s@tcp(%s)/%s?charset=utf8mb4&parseTime=true",
config.DatabaseUser.GetString(),
config.DatabasePassword.GetString(),
config.DatabaseHost.GetString(),
config.DatabaseDatabase.GetString())
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engine, err = xorm.NewEngine("mysql", connStr)
if err != nil {
return
}
engine.SetMaxOpenConns(config.DatabaseMaxOpenConnections.GetInt())
engine.SetMaxIdleConns(config.DatabaseMaxIdleConnections.GetInt())
max, err := time.ParseDuration(strconv.Itoa(config.DatabaseMaxConnectionLifetime.GetInt()) + `ms`)
if err != nil {
return
}
engine.SetConnMaxLifetime(max)
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return
}
// parsePostgreSQLHostPort parses given input in various forms defined in
// https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
// and returns proper host and port number.
func parsePostgreSQLHostPort(info string) (string, string) {
host, port := "127.0.0.1", "5432"
if strings.Contains(info, ":") && !strings.HasSuffix(info, "]") {
idx := strings.LastIndex(info, ":")
host = info[:idx]
port = info[idx+1:]
} else if len(info) > 0 {
host = info
}
return host, port
}
func initPostgresEngine() (engine *xorm.Engine, err error) {
host, port := parsePostgreSQLHostPort(config.DatabaseHost.GetString())
connStr := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=%s",
host,
port,
url.PathEscape(config.DatabaseUser.GetString()),
url.PathEscape(config.DatabasePassword.GetString()),
config.DatabaseDatabase.GetString(),
config.DatabaseSslMode.GetString(),
)
engine, err = xorm.NewEngine("postgres", connStr)
if err != nil {
return
}
engine.SetMaxOpenConns(config.DatabaseMaxOpenConnections.GetInt())
engine.SetMaxIdleConns(config.DatabaseMaxIdleConnections.GetInt())
max, err := time.ParseDuration(strconv.Itoa(config.DatabaseMaxConnectionLifetime.GetInt()) + `ms`)
if err != nil {
return
}
engine.SetConnMaxLifetime(max)
return
}
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func initSqliteEngine() (engine *xorm.Engine, err error) {
path := config.DatabasePath.GetString()
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if path == "" {
path = "./db.db"
}
// Try opening the db file to return a better error message if that does not work
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var exists = true
if _, err := os.Stat(path); err != nil {
exists = !os.IsNotExist(err)
}
file, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE, 0)
if err != nil {
return nil, fmt.Errorf("could not open database file [uid=%d, gid=%d]: %s", os.Getuid(), os.Getgid(), err)
}
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_ = file.Close() // We directly close the file because we only want to check if it is writable. It will be reopened lazily later by xorm.
if !exists {
_ = os.Remove(path) // Remove the file to not prevent the db from creating another one
}
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return xorm.NewEngine("sqlite3", path)
}
// WipeEverything wipes all tables and their data. Use with caution...
func WipeEverything() error {
tables, err := x.DBMetas()
if err != nil {
return err
}
for _, t := range tables {
if err := x.DropTables(t.Name); err != nil {
return err
}
}
return nil
}