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database.go
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database.go
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/*
* Copyright (c) 2018. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells 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.
*
* Pydio Cells 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 Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
package lib
import (
"context"
"crypto/sha1"
"database/sql"
"errors"
"fmt"
"io"
"regexp"
"strings"
"time"
"github.com/go-sql-driver/mysql"
"github.com/pydio/cells/common/config"
"github.com/pydio/cells/common/log"
"github.com/pydio/cells/common/proto/install"
"github.com/pydio/cells/x/configx"
)
var (
ErrMySQLCharsetNotSupported = errors.New("Charset is not supported for this version of MySQL")
ErrMySQLVersionNotSupported = errors.New("This version of the database is currently not supported")
)
func dsnFromInstallConfig(c *install.InstallConfig) (string, error) {
var err error
conf := mysql.NewConfig()
switch c.GetDbConnectionType() {
case "tcp":
conf, err = addDatabaseTCPConnection(c)
case "socket":
conf, err = addDatabaseSocketConnection(c)
case "manual":
conf, err = addDatabaseManualConnection(c)
default:
return "", fmt.Errorf("Unknown type")
}
if err != nil {
return "", err
}
conf.ParseTime = true
// Check DB Connection
dsn := conf.FormatDSN()
return dsn, nil
}
// DATABASES
func actionDatabaseAdd(c *install.InstallConfig) error {
dsn, err := dsnFromInstallConfig(c)
if err != nil {
return err
}
if e := checkConnection(dsn); e != nil {
return e
}
connection := map[string]string{
"driver": "mysql",
"dsn": dsn,
}
h := sha1.New()
io.WriteString(h, dsn)
id := fmt.Sprintf("%x", h.Sum(nil))
config.Set(connection, "databases", id)
// Only set the default if the default is not set
if config.Get("defaults", "database").String() == "" {
config.Set(configx.Reference("#/databases/"+id), "defaults", "database")
}
config.Save("cli", "Install / Setting Databases")
return nil
}
func addDatabaseTCPConnection(c *install.InstallConfig) (*mysql.Config, error) {
conf := mysql.NewConfig()
conf.User = c.GetDbTCPUser()
conf.Passwd = c.GetDbTCPPassword()
conf.Net = "tcp"
conf.Addr = fmt.Sprintf("%s:%s", c.GetDbTCPHostname(), c.GetDbTCPPort())
conf.DBName = c.GetDbTCPName()
return conf, nil
}
func addDatabaseSocketConnection(c *install.InstallConfig) (*mysql.Config, error) {
conf := mysql.NewConfig()
conf.User = c.GetDbSocketUser()
conf.Passwd = c.GetDbSocketPassword()
conf.Net = "unix"
conf.Addr = c.GetDbSocketFile()
conf.DBName = c.GetDbSocketName()
return conf, nil
}
func addDatabaseManualConnection(c *install.InstallConfig) (*mysql.Config, error) {
// DSN has already been validated - no need to check the error
conf, _ := mysql.ParseDSN(c.GetDbManualDSN())
return conf, nil
}
func checkConnection(dsn string) error {
for {
if db, err := sql.Open("mysql", dsn); err != nil {
return err
} else {
// Open doesn't open a connection. Validate DSN data:
c, cf := context.WithTimeout(context.Background(), 3*time.Second)
defer cf()
if err := db.PingContext(c); err != nil && strings.HasPrefix(err.Error(), "Error 1049") {
rootconf, _ := mysql.ParseDSN(dsn)
dbname := rootconf.DBName
rootconf.DBName = ""
rootdsn := rootconf.FormatDSN()
if rootdb, rooterr := sql.Open("mysql", rootdsn); rooterr != nil {
return rooterr
} else {
version, err := getMysqlVersion(rootdb)
if err != nil {
return err
}
if err := checkMysqlCompat(version); err != nil {
return err
}
errCharset := checkMysqlCharset(rootdb, version)
switch {
case errCharset == ErrMySQLCharsetNotSupported:
dbname = dbname + " CHARACTER SET utf8 COLLATE utf8_general_ci"
case errCharset != nil:
return errCharset
}
if _, err = rootdb.Exec(fmt.Sprintf("create database if not exists %s", dbname)); err != nil {
return err
}
}
} else if err != nil {
return err
} else {
version, err := getMysqlVersion(db)
if err != nil {
return err
}
if err := checkMysqlCompat(version); err != nil {
return err
}
if err := checkMysqlCharset(db, version); err != nil {
return err
}
break
}
}
}
return nil
}
func getMysqlVersion(db *sql.DB) (string, error) {
// Here we check the version of mysql and the default charset
var version string
err := db.QueryRow("SELECT VERSION()").Scan(&version)
switch {
case err == sql.ErrNoRows:
return "", fmt.Errorf("Could not retrieve your mysql version - Please create the database manually and retry")
case err != nil:
return "", err
}
return version, nil
}
func checkMysqlCompat(version string) error {
mysql8022Matched, err := regexp.MatchString("^8.0.22$", version)
if err != nil {
return fmt.Errorf("Could not determine db version")
}
if mysql8022Matched {
log.Error(ErrMySQLVersionNotSupported.Error())
return ErrMySQLVersionNotSupported
}
return nil
}
func checkMysqlCharset(db *sql.DB, version string) error {
// Matches
mysqlMatched, err1 := regexp.MatchString("^5.[456].*$", version)
mariaMatched, err2 := regexp.MatchString("^10.1.*-MariaDB$", version)
if err1 != nil || err2 != nil {
return fmt.Errorf("Could not determine db version")
}
if mysqlMatched || mariaMatched {
var charname, charvalue string
err := db.QueryRow("SHOW VARIABLES LIKE 'character_set_database'").Scan(&charname, &charvalue)
switch {
case err == sql.ErrNoRows:
return fmt.Errorf("Could not retrieve your default charset - Please create the database manually and retry")
case err != nil:
return err
default:
}
if charvalue == "utf8mb4" {
return ErrMySQLCharsetNotSupported
}
}
return nil
}
func checkCellsInstallExists(dsn string) (install bool, admin bool, e error) {
db, err := sql.Open("mysql", dsn)
if err != nil {
return
}
rows, er := db.Query("SHOW TABLES LIKE 'idm_user_%'")
if er != nil {
return
}
defer rows.Close()
//var tables []string
var table string
var iut, iua bool
for rows.Next() {
if er = rows.Scan(&table); er == nil {
switch table {
case "idm_user_idx_tree":
iut = true
case "idm_user_attributes":
iua = true
}
}
}
if iut && iua {
install = true
q := "SELECT count(t.name) FROM `idm_user_idx_tree` as t , `idm_user_attributes` as a WHERE (a.name = 'profile' AND a.value = 'admin') AND (t.uuid = a.uuid) LIMIT 1"
var count int
if er := db.QueryRow(q).Scan(&count); er == nil && count > 0 {
admin = true
}
}
return
}