includes/installer/SqliteInstaller.php

   1 <?php
   2 /**
   3  * Sqlite-specific installer.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Deployment
  22  */
  23
  24 /**
  25  * Class for setting up the MediaWiki database using SQLLite.
  26  *
  27  * @ingroup Deployment
  28  * @since 1.17
  29  */
  30 class SqliteInstaller extends DatabaseInstaller {
  31         const MINIMUM_VERSION = '3.3.7';
  32
  33         /**
  34          * @var DatabaseSqlite
  35          */
  36         public $db;
  37
  38         protected $globalNames = [
  39                 'wgDBname',
  40                 'wgSQLiteDataDir',
  41         ];
  42
  43         public function getName() {
  44                 return 'sqlite';
  45         }
  46
  47         public function isCompiled() {
  48                 return self::checkExtension( 'pdo_sqlite' );
  49         }
  50
  51         /**
  52          *
  53          * @return Status
  54          */
  55         public function checkPrerequisites() {
  56                 $result = Status::newGood();
  57                 // Bail out if SQLite is too old
  58                 $db = DatabaseSqlite::newStandaloneInstance( ':memory:' );
  59                 if ( version_compare( $db->getServerVersion(), self::MINIMUM_VERSION, '<' ) ) {
  60                         $result->fatal( 'config-outdated-sqlite', $db->getServerVersion(), self::MINIMUM_VERSION );
  61                 }
  62                 // Check for FTS3 full-text search module
  63                 if ( DatabaseSqlite::getFulltextSearchModule() != 'FTS3' ) {
  64                         $result->warning( 'config-no-fts3' );
  65                 }
  66
  67                 return $result;
  68         }
  69
  70         public function getGlobalDefaults() {
  71                 $defaults = parent::getGlobalDefaults();
  72                 if ( isset( $_SERVER['DOCUMENT_ROOT'] ) ) {
  73                         $path = str_replace(
  74                                 [ '/', '\\' ],
  75                                 DIRECTORY_SEPARATOR,
  76                                 dirname( $_SERVER['DOCUMENT_ROOT'] ) . '/data'
  77                         );
  78
  79                         $defaults['wgSQLiteDataDir'] = $path;
  80                 }
  81                 return $defaults;
  82         }
  83
  84         public function getConnectForm() {
  85                 return $this->getTextBox(
  86                         'wgSQLiteDataDir',
  87                         'config-sqlite-dir', [],
  88                         $this->parent->getHelpBox( 'config-sqlite-dir-help' )
  89                 ) .
  90                 $this->getTextBox(
  91                         'wgDBname',
  92                         'config-db-name',
  93                         [],
  94                         $this->parent->getHelpBox( 'config-sqlite-name-help' )
  95                 );
  96         }
  97
  98         /**
  99          * Safe wrapper for PHP's realpath() that fails gracefully if it's unable to canonicalize the path.
 100          *
 101          * @param string $path
 102          *
 103          * @return string
 104          */
 105         private static function realpath( $path ) {
 106                 $result = realpath( $path );
 107                 if ( !$result ) {
 108                         return $path;
 109                 }
 110
 111                 return $result;
 112         }
 113
 114         /**
 115          * @return Status
 116          */
 117         public function submitConnectForm() {
 118                 $this->setVarsFromRequest( [ 'wgSQLiteDataDir', 'wgDBname' ] );
 119
 120                 # Try realpath() if the directory already exists
 121                 $dir = self::realpath( $this->getVar( 'wgSQLiteDataDir' ) );
 122                 $result = self::dataDirOKmaybeCreate( $dir, true /* create? */ );
 123                 if ( $result->isOK() ) {
 124                         # Try expanding again in case we've just created it
 125                         $dir = self::realpath( $dir );
 126                         $this->setVar( 'wgSQLiteDataDir', $dir );
 127                 }
 128                 # Table prefix is not used on SQLite, keep it empty
 129                 $this->setVar( 'wgDBprefix', '' );
 130
 131                 return $result;
 132         }
 133
 134         /**
 135          * @param string $dir
 136          * @param bool $create
 137          * @return Status
 138          */
 139         private static function dataDirOKmaybeCreate( $dir, $create = false ) {
 140                 if ( !is_dir( $dir ) ) {
 141                         if ( !is_writable( dirname( $dir ) ) ) {
 142                                 $webserverGroup = Installer::maybeGetWebserverPrimaryGroup();
 143                                 if ( $webserverGroup !== null ) {
 144                                         return Status::newFatal(
 145                                                 'config-sqlite-parent-unwritable-group',
 146                                                 $dir, dirname( $dir ), basename( $dir ),
 147                                                 $webserverGroup
 148                                         );
 149                                 } else {
 150                                         return Status::newFatal(
 151                                                 'config-sqlite-parent-unwritable-nogroup',
 152                                                 $dir, dirname( $dir ), basename( $dir )
 153                                         );
 154                                 }
 155                         }
 156
 157                         # Called early on in the installer, later we just want to sanity check
 158                         # if it's still writable
 159                         if ( $create ) {
 160                                 MediaWiki\suppressWarnings();
 161                                 $ok = wfMkdirParents( $dir, 0700, __METHOD__ );
 162                                 MediaWiki\restoreWarnings();
 163                                 if ( !$ok ) {
 164                                         return Status::newFatal( 'config-sqlite-mkdir-error', $dir );
 165                                 }
 166                                 # Put a .htaccess file in in case the user didn't take our advice
 167                                 file_put_contents( "$dir/.htaccess", "Deny from all\n" );
 168                         }
 169                 }
 170                 if ( !is_writable( $dir ) ) {
 171                         return Status::newFatal( 'config-sqlite-dir-unwritable', $dir );
 172                 }
 173
 174                 # We haven't blown up yet, fall through
 175                 return Status::newGood();
 176         }
 177
 178         /**
 179          * @return Status
 180          */
 181         public function openConnection() {
 182                 global $wgSQLiteDataDir;
 183
 184                 $status = Status::newGood();
 185                 $dir = $this->getVar( 'wgSQLiteDataDir' );
 186                 $dbName = $this->getVar( 'wgDBname' );
 187                 try {
 188                         # @todo FIXME: Need more sensible constructor parameters, e.g. single associative array
 189                         # Setting globals kind of sucks
 190                         $wgSQLiteDataDir = $dir;
 191                         $db = DatabaseBase::factory( 'sqlite', [ 'dbname' => $dbName ] );
 192                         $status->value = $db;
 193                 } catch ( DBConnectionError $e ) {
 194                         $status->fatal( 'config-sqlite-connection-error', $e->getMessage() );
 195                 }
 196
 197                 return $status;
 198         }
 199
 200         /**
 201          * @return bool
 202          */
 203         public function needsUpgrade() {
 204                 $dir = $this->getVar( 'wgSQLiteDataDir' );
 205                 $dbName = $this->getVar( 'wgDBname' );
 206                 // Don't create the data file yet
 207                 if ( !file_exists( DatabaseSqlite::generateFileName( $dir, $dbName ) ) ) {
 208                         return false;
 209                 }
 210
 211                 // If the data file exists, look inside it
 212                 return parent::needsUpgrade();
 213         }
 214
 215         /**
 216          * @return Status
 217          */
 218         public function setupDatabase() {
 219                 $dir = $this->getVar( 'wgSQLiteDataDir' );
 220
 221                 # Sanity check. We checked this before but maybe someone deleted the
 222                 # data dir between then and now
 223                 $dir_status = self::dataDirOKmaybeCreate( $dir, false /* create? */ );
 224                 if ( !$dir_status->isOK() ) {
 225                         return $dir_status;
 226                 }
 227
 228                 $db = $this->getVar( 'wgDBname' );
 229
 230                 # Make the main and cache stub DB files
 231                 $status = Status::newGood();
 232                 $status->merge( $this->makeStubDBFile( $dir, $db ) );
 233                 $status->merge( $this->makeStubDBFile( $dir, "wikicache" ) );
 234                 if ( !$status->isOK() ) {
 235                         return $status;
 236                 }
 237
 238                 # Nuke the unused settings for clarity
 239                 $this->setVar( 'wgDBserver', '' );
 240                 $this->setVar( 'wgDBuser', '' );
 241                 $this->setVar( 'wgDBpassword', '' );
 242                 $this->setupSchemaVars();
 243
 244                 # Create the global cache DB
 245                 try {
 246                         global $wgSQLiteDataDir;
 247                         # @todo FIXME: setting globals kind of sucks
 248                         $wgSQLiteDataDir = $dir;
 249                         $conn = DatabaseBase::factory( 'sqlite', [ 'dbname' => "wikicache" ] );
 250                         # @todo: don't duplicate objectcache definition, though it's very simple
 251                         $sql =
 252 <<<EOT
 253         CREATE TABLE IF NOT EXISTS objectcache (
 254           keyname BLOB NOT NULL default '' PRIMARY KEY,
 255           value BLOB,
 256           exptime TEXT
 257         )
 258 EOT;
 259                         $conn->query( $sql );
 260                         $conn->query( "CREATE INDEX IF NOT EXISTS exptime ON objectcache (exptime)" );
 261                         $conn->query( "PRAGMA journal_mode=WAL" ); // this is permanent
 262                         $conn->close();
 263                 } catch ( DBConnectionError $e ) {
 264                         return Status::newFatal( 'config-sqlite-connection-error', $e->getMessage() );
 265                 }
 266
 267                 # Open the main DB
 268                 return $this->getConnection();
 269         }
 270
 271         protected function makeStubDBFile( $dir, $db ) {
 272                 $file = DatabaseSqlite::generateFileName( $dir, $db );
 273                 if ( file_exists( $file ) ) {
 274                         if ( !is_writable( $file ) ) {
 275                                 return Status::newFatal( 'config-sqlite-readonly', $file );
 276                         }
 277                 } else {
 278                         if ( file_put_contents( $file, '' ) === false ) {
 279                                 return Status::newFatal( 'config-sqlite-cant-create-db', $file );
 280                         }
 281                 }
 282
 283                 return Status::newGood();
 284         }
 285
 286         /**
 287          * @return Status
 288          */
 289         public function createTables() {
 290                 $status = parent::createTables();
 291
 292                 return $this->setupSearchIndex( $status );
 293         }
 294
 295         /**
 296          * @param Status $status
 297          * @return Status
 298          */
 299         public function setupSearchIndex( &$status ) {
 300                 global $IP;
 301
 302                 $module = DatabaseSqlite::getFulltextSearchModule();
 303                 $fts3tTable = $this->db->checkForEnabledSearch();
 304                 if ( $fts3tTable && !$module ) {
 305                         $status->warning( 'config-sqlite-fts3-downgrade' );
 306                         $this->db->sourceFile( "$IP/maintenance/sqlite/archives/searchindex-no-fts.sql" );
 307                 } elseif ( !$fts3tTable && $module == 'FTS3' ) {
 308                         $this->db->sourceFile( "$IP/maintenance/sqlite/archives/searchindex-fts3.sql" );
 309                 }
 310
 311                 return $status;
 312         }
 313
 314         /**
 315          * @return string
 316          */
 317         public function getLocalSettings() {
 318                 $dir = LocalSettingsGenerator::escapePhpString( $this->getVar( 'wgSQLiteDataDir' ) );
 319
 320                 return "# SQLite-specific settings
 321 \$wgSQLiteDataDir = \"{$dir}\";
 322 \$wgObjectCaches[CACHE_DB] = [
 323         'class' => 'SqlBagOStuff',
 324         'loggroup' => 'SQLBagOStuff',
 325         'server' => [
 326                 'type' => 'sqlite',
 327                 'dbname' => 'wikicache',
 328                 'tablePrefix' => '',
 329                 'flags' => 0
 330         ]
 331 ];";
 332         }
 333 }