@gmail.com * * 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 2 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 General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * http://www.gnu.org/copyleft/gpl.html */ if (!defined('MEDIAWIKI')) { // Eclipse helper - will be ignored in production require_once ('ApiQueryBase.php'); } /** * A query action to enumerate revisions of a given page, or show top revisions of multiple pages. * Various pieces of information may be shown - flags, comments, and the actual wiki markup of the rev. * In the enumeration mode, ranges of revisions may be requested and filtered. * * @ingroup API */ class ApiQueryRevisions extends ApiQueryBase { public function __construct($query, $moduleName) { parent :: __construct($query, $moduleName, 'rv'); } private $fld_ids = false, $fld_flags = false, $fld_timestamp = false, $fld_size = false, $fld_comment = false, $fld_user = false, $fld_content = false; protected function getTokenFunctions() { // tokenname => function // function prototype is func($pageid, $title, $rev) // should return token or false // Don't call the hooks twice if(isset($this->tokenFunctions)) return $this->tokenFunctions; // If we're in JSON callback mode, no tokens can be obtained if(!is_null($this->getMain()->getRequest()->getVal('callback'))) return array(); $this->tokenFunctions = array( 'rollback' => array( 'ApiQueryRevisions', 'getRollbackToken' ) ); wfRunHooks('APIQueryRevisionsTokens', array(&$this->tokenFunctions)); return $this->tokenFunctions; } public static function getRollbackToken($pageid, $title, $rev) { global $wgUser; if(!$wgUser->isAllowed('rollback')) return false; return $wgUser->editToken(array($title->getPrefixedText(), $rev->getUserText())); } public function execute() { $params = $this->extractRequestParams(false); // If any of those parameters are used, work in 'enumeration' mode. // Enum mode can only be used when exactly one page is provided. // Enumerating revisions on multiple pages make it extremely // difficult to manage continuations and require additional SQL indexes $enumRevMode = (!is_null($params['user']) || !is_null($params['excludeuser']) || !is_null($params['limit']) || !is_null($params['startid']) || !is_null($params['endid']) || $params['dir'] === 'newer' || !is_null($params['start']) || !is_null($params['end'])); $pageSet = $this->getPageSet(); $pageCount = $pageSet->getGoodTitleCount(); $revCount = $pageSet->getRevisionCount(); // Optimization -- nothing to do if ($revCount === 0 && $pageCount === 0) return; if ($revCount > 0 && $enumRevMode) $this->dieUsage('The revids= parameter may not be used with the list options (limit, startid, endid, dirNewer, start, end).', 'revids'); if ($pageCount > 1 && $enumRevMode) $this->dieUsage('titles, pageids or a generator was used to supply multiple pages, but the limit, startid, endid, dirNewer, user, excludeuser, start and end parameters may only be used on a single page.', 'multpages'); if (!is_null($params['diffto'])) { if ($params['diffto'] == 'cur') $params['diffto'] = 0; if ((!ctype_digit($params['diffto']) || $params['diffto'] < 0) && $params['diffto'] != 'prev' && $params['diffto'] != 'next') $this->dieUsage('rvdiffto must be set to a non-negative number, "prev", "next" or "cur"', 'diffto'); // Check whether the revision exists and is readable, // DifferenceEngine returns a rather ambiguous empty // string if that's not the case if ($params['diffto'] != 0) { $difftoRev = Revision::newFromID($params['diffto']); if (!$difftoRev) $this->dieUsageMsg(array('nosuchrevid', $params['diffto'])); if (!$difftoRev->userCan(Revision::DELETED_TEXT)) { $this->setWarning("Couldn't diff to r{$difftoRev->getID()}: content is hidden"); $params['diffto'] = null; } } } $this->addTables('revision'); $this->addFields(Revision::selectFields()); $this->addTables('page'); $this->addWhere('page_id = rev_page'); $prop = array_flip($params['prop']); // Optional fields $this->fld_ids = isset ($prop['ids']); // $this->addFieldsIf('rev_text_id', $this->fld_ids); // should this be exposed? $this->fld_flags = isset ($prop['flags']); $this->fld_timestamp = isset ($prop['timestamp']); $this->fld_comment = isset ($prop['comment']); $this->fld_size = isset ($prop['size']); $this->fld_user = isset ($prop['user']); $this->token = $params['token']; $this->diffto = $params['diffto']; if ( !is_null($this->token) || $pageCount > 0) { $this->addFields( Revision::selectPageFields() ); } if (isset ($prop['content'])) { // For each page we will request, the user must have read rights for that page foreach ($pageSet->getGoodTitles() as $title) { if( !$title->userCanRead() ) $this->dieUsage( 'The current user is not allowed to read ' . $title->getPrefixedText(), 'accessdenied'); } $this->addTables('text'); $this->addWhere('rev_text_id=old_id'); $this->addFields('old_id'); $this->addFields(Revision::selectTextFields()); $this->fld_content = true; $this->expandTemplates = $params['expandtemplates']; $this->generateXML = $params['generatexml']; if(isset($params['section'])) $this->section = $params['section']; else $this->section = false; } $userMax = ( $this->fld_content ? ApiBase::LIMIT_SML1 : ApiBase::LIMIT_BIG1 ); $botMax = ( $this->fld_content ? ApiBase::LIMIT_SML2 : ApiBase::LIMIT_BIG2 ); $limit = $params['limit']; if( $limit == 'max' ) { $limit = $this->getMain()->canApiHighLimits() ? $botMax : $userMax; $this->getResult()->addValue( 'limits', $this->getModuleName(), $limit ); } if ($enumRevMode) { // This is mostly to prevent parameter errors (and optimize SQL?) if (!is_null($params['startid']) && !is_null($params['start'])) $this->dieUsage('start and startid cannot be used together', 'badparams'); if (!is_null($params['endid']) && !is_null($params['end'])) $this->dieUsage('end and endid cannot be used together', 'badparams'); if(!is_null($params['user']) && !is_null($params['excludeuser'])) $this->dieUsage('user and excludeuser cannot be used together', 'badparams'); // This code makes an assumption that sorting by rev_id and rev_timestamp produces // the same result. This way users may request revisions starting at a given time, // but to page through results use the rev_id returned after each page. // Switching to rev_id removes the potential problem of having more than // one row with the same timestamp for the same page. // The order needs to be the same as start parameter to avoid SQL filesort. if (is_null($params['startid']) && is_null($params['endid'])) $this->addWhereRange('rev_timestamp', $params['dir'], $params['start'], $params['end']); else { $this->addWhereRange('rev_id', $params['dir'], $params['startid'], $params['endid']); // One of start and end can be set // If neither is set, this does nothing $this->addWhereRange('rev_timestamp', $params['dir'], $params['start'], $params['end'], false); } // must manually initialize unset limit if (is_null($limit)) $limit = 10; $this->validateLimit('limit', $limit, 1, $userMax, $botMax); // There is only one ID, use it $this->addWhereFld('rev_page', reset(array_keys($pageSet->getGoodTitles()))); if(!is_null($params['user'])) { $this->addWhereFld('rev_user_text', $params['user']); } elseif (!is_null($params['excludeuser'])) { $this->addWhere('rev_user_text != ' . $this->getDB()->addQuotes($params['excludeuser'])); } if(!is_null($params['user']) || !is_null($params['excludeuser'])) { // Paranoia: avoid brute force searches (bug 17342) $this->addWhere('rev_deleted & ' . Revision::DELETED_USER . ' = 0'); } } elseif ($revCount > 0) { $max = $this->getMain()->canApiHighLimits() ? $botMax : $userMax; $revs = $pageSet->getRevisionIDs(); if(self::truncateArray($revs, $max)) $this->setWarning("Too many values supplied for parameter 'revids': the limit is $max"); // Get all revision IDs $this->addWhereFld('rev_id', array_keys($revs)); if(!is_null($params['continue'])) $this->addWhere("rev_id >= '" . intval($params['continue']) . "'"); $this->addOption('ORDER BY', 'rev_id'); // assumption testing -- we should never get more then $revCount rows. $limit = $revCount; } elseif ($pageCount > 0) { $max = $this->getMain()->canApiHighLimits() ? $botMax : $userMax; $titles = $pageSet->getGoodTitles(); if(self::truncateArray($titles, $max)) $this->setWarning("Too many values supplied for parameter 'titles': the limit is $max"); // When working in multi-page non-enumeration mode, // limit to the latest revision only $this->addWhere('page_id=rev_page'); $this->addWhere('page_latest=rev_id'); // Get all page IDs $this->addWhereFld('page_id', array_keys($titles)); // Every time someone relies on equality propagation, god kills a kitten :) $this->addWhereFld('rev_page', array_keys($titles)); if(!is_null($params['continue'])) { $cont = explode('|', $params['continue']); if(count($cont) != 2) $this->dieUsage("Invalid continue param. You should pass the original " . "value returned by the previous query", "_badcontinue"); $pageid = intval($cont[0]); $revid = intval($cont[1]); $this->addWhere("rev_page > '$pageid' OR " . "(rev_page = '$pageid' AND " . "rev_id >= '$revid')"); } $this->addOption('ORDER BY', 'rev_page, rev_id'); // assumption testing -- we should never get more then $pageCount rows. $limit = $pageCount; } else ApiBase :: dieDebug(__METHOD__, 'param validation?'); $this->addOption('LIMIT', $limit +1); $data = array (); $count = 0; $res = $this->select(__METHOD__); $db = $this->getDB(); while ($row = $db->fetchObject($res)) { if (++ $count > $limit) { // We've reached the one extra which shows that there are additional pages to be had. Stop here... if (!$enumRevMode) ApiBase :: dieDebug(__METHOD__, 'Got more rows then expected'); // bug report $this->setContinueEnumParameter('startid', intval($row->rev_id)); break; } $revision = new Revision( $row ); // $fit = $this->addPageSubItem($revision->getPage(), $this->extractRowInfo($revision), 'rev'); if(!$fit) { if($enumRevMode) $this->setContinueEnumParameter('startid', intval($row->rev_id)); else if($revCount > 0) $this->setContinueEnumParameter('continue', intval($row->rev_id)); else $this->setContinueEnumParameter('continue', intval($row->rev_page) . '|' . intval($row->rev_id)); break; } } $db->freeResult($res); } private function extractRowInfo( $revision ) { $title = $revision->getTitle(); $vals = array (); if ($this->fld_ids) { $vals['revid'] = intval($revision->getId()); // $vals['oldid'] = intval($row->rev_text_id); // todo: should this be exposed? } if ($this->fld_flags && $revision->isMinor()) $vals['minor'] = ''; if ($this->fld_user) { if ($revision->isDeleted(Revision::DELETED_USER)) { $vals['userhidden'] = ''; } else { $vals['user'] = $revision->getUserText(); if (!$revision->getUser()) $vals['anon'] = ''; } } if ($this->fld_timestamp) { $vals['timestamp'] = wfTimestamp(TS_ISO_8601, $revision->getTimestamp()); } if ($this->fld_size && !is_null($revision->getSize())) { $vals['size'] = intval($revision->getSize()); } if ($this->fld_comment) { if ($revision->isDeleted(Revision::DELETED_COMMENT)) { $vals['commenthidden'] = ''; } else { $comment = $revision->getComment(); if (strval($comment) !== '') $vals['comment'] = $comment; } } if(!is_null($this->token)) { $tokenFunctions = $this->getTokenFunctions(); foreach($this->token as $t) { $val = call_user_func($tokenFunctions[$t], $title->getArticleID(), $title, $revision); if($val === false) $this->setWarning("Action '$t' is not allowed for the current user"); else $vals[$t . 'token'] = $val; } } if ($this->fld_content && !$revision->isDeleted(Revision::DELETED_TEXT)) { global $wgParser; $text = $revision->getText(); # Expand templates after getting section content because # template-added sections don't count and Parser::preprocess() # will have less input if ($this->section !== false) { $text = $wgParser->getSection( $text, $this->section, false); if($text === false) $this->dieUsage("There is no section {$this->section} in r".$revision->getId(), 'nosuchsection'); } if ($this->generateXML) { $wgParser->startExternalParse( $title, new ParserOptions(), OT_PREPROCESS ); $dom = $wgParser->preprocessToDom( $text ); if ( is_callable( array( $dom, 'saveXML' ) ) ) { $xml = $dom->saveXML(); } else { $xml = $dom->__toString(); } $vals['parsetree'] = $xml; } if ($this->expandTemplates) { $text = $wgParser->preprocess( $text, $title, new ParserOptions() ); } ApiResult :: setContent($vals, $text); } else if ($this->fld_content) { $vals['texthidden'] = ''; } if (!is_null($this->diffto)) { global $wgAPIMaxUncachedDiffs; static $n = 0; // Numer of uncached diffs we've had if($n< $wgAPIMaxUncachedDiffs) { $engine = new DifferenceEngine($title, $revision->getID(), $this->diffto); $difftext = $engine->getDiffBody(); $vals['diff']['from'] = $engine->getOldid(); $vals['diff']['to'] = $engine->getNewid(); ApiResult::setContent($vals['diff'], $difftext); if(!$engine->wasCacheHit()) $n++; } else { $vals['diff']['notcached'] = ''; } } return $vals; } public function getAllowedParams() { return array ( 'prop' => array ( ApiBase :: PARAM_ISMULTI => true, ApiBase :: PARAM_DFLT => 'ids|timestamp|flags|comment|user', ApiBase :: PARAM_TYPE => array ( 'ids', 'flags', 'timestamp', 'user', 'size', 'comment', 'content', ) ), 'limit' => array ( ApiBase :: PARAM_TYPE => 'limit', ApiBase :: PARAM_MIN => 1, ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1, ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2 ), 'startid' => array ( ApiBase :: PARAM_TYPE => 'integer' ), 'endid' => array ( ApiBase :: PARAM_TYPE => 'integer' ), 'start' => array ( ApiBase :: PARAM_TYPE => 'timestamp' ), 'end' => array ( ApiBase :: PARAM_TYPE => 'timestamp' ), 'dir' => array ( ApiBase :: PARAM_DFLT => 'older', ApiBase :: PARAM_TYPE => array ( 'newer', 'older' ) ), 'user' => array( ApiBase :: PARAM_TYPE => 'user' ), 'excludeuser' => array( ApiBase :: PARAM_TYPE => 'user' ), 'expandtemplates' => false, 'generatexml' => false, 'section' => null, 'token' => array( ApiBase :: PARAM_TYPE => array_keys($this->getTokenFunctions()), ApiBase :: PARAM_ISMULTI => true ), 'continue' => null, 'diffto' => null, ); } public function getParamDescription() { return array ( 'prop' => 'Which properties to get for each revision.', 'limit' => 'limit how many revisions will be returned (enum)', 'startid' => 'from which revision id to start enumeration (enum)', 'endid' => 'stop revision enumeration on this revid (enum)', 'start' => 'from which revision timestamp to start enumeration (enum)', 'end' => 'enumerate up to this timestamp (enum)', 'dir' => 'direction of enumeration - towards "newer" or "older" revisions (enum)', 'user' => 'only include revisions made by user', 'excludeuser' => 'exclude revisions made by user', 'expandtemplates' => 'expand templates in revision content', 'generatexml' => 'generate XML parse tree for revision content', 'section' => 'only retrieve the content of this section', 'token' => 'Which tokens to obtain for each revision', 'continue' => 'When more results are available, use this to continue', 'diffto' => array('Revision ID to diff each revision to.', 'Use "prev", "next" and "cur" for the previous, next and current revision respectively.'), ); } public function getDescription() { return array ( 'Get revision information.', 'This module may be used in several ways:', ' 1) Get data about a set of pages (last revision), by setting titles or pageids parameter.', ' 2) Get revisions for one given page, by using titles/pageids with start/end/limit params.', ' 3) Get data about a set of revisions by setting their IDs with revids parameter.', 'All parameters marked as (enum) may only be used with a single page (#2).' ); } protected function getExamples() { return array ( 'Get data with content for the last revision of titles "API" and "Main Page":', ' api.php?action=query&prop=revisions&titles=API|Main%20Page&rvprop=timestamp|user|comment|content', 'Get last 5 revisions of the "Main Page":', ' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment', 'Get first 5 revisions of the "Main Page":', ' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment&rvdir=newer', 'Get first 5 revisions of the "Main Page" made after 2006-05-01:', ' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment&rvdir=newer&rvstart=20060501000000', 'Get first 5 revisions of the "Main Page" that were not made made by anonymous user "127.0.0.1"', ' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment&rvexcludeuser=127.0.0.1', 'Get first 5 revisions of the "Main Page" that were made by the user "MediaWiki default"', ' api.php?action=query&prop=revisions&titles=Main%20Page&rvlimit=5&rvprop=timestamp|user|comment&rvuser=MediaWiki%20default', ); } public function getVersion() { return __CLASS__ . ': $Id: ApiQueryRevisions.php 48642 2009-03-20 20:21:38Z midom $'; } }