/**
* Loads everything except the text
* This isn't necessary for all uses, so it's only done if needed.
*/
protected function loadLastEdit()
{
if ($this->mLastRevision !== null) {
return;
// already loaded
}
$latest = $this->getLatest();
if (!$latest) {
return;
// page doesn't exist or is missing page_latest info
}
if ($this->mDataLoadedFrom == self::READ_LOCKING) {
// Bug 37225: if session S1 loads the page row FOR UPDATE, the result always
// includes the latest changes committed. This is true even within REPEATABLE-READ
// transactions, where S1 normally only sees changes committed before the first S1
// SELECT. Thus we need S1 to also gets the revision row FOR UPDATE; otherwise, it
// may not find it since a page row UPDATE and revision row INSERT by S2 may have
// happened after the first S1 SELECT.
// http://dev.mysql.com/doc/refman/5.0/en/set-transaction.html#isolevel_repeatable-read
$flags = Revision::READ_LOCKING;
$revision = Revision::newFromPageId($this->getId(), $latest, $flags);
} elseif ($this->mDataLoadedFrom == self::READ_LATEST) {
// Bug T93976: if page_latest was loaded from the master, fetch the
// revision from there as well, as it may not exist yet on a replica DB.
// Also, this keeps the queries in the same REPEATABLE-READ snapshot.
$flags = Revision::READ_LATEST;
$revision = Revision::newFromPageId($this->getId(), $latest, $flags);
} else {
$dbr = wfGetDB(DB_REPLICA);
$revision = Revision::newKnownCurrent($dbr, $this->getId(), $latest);
}
if ($revision) {
// sanity
$this->setLastEdit($revision);
}
}
/**
* Loads everything except the text
* This isn't necessary for all uses, so it's only done if needed.
*/
protected function loadLastEdit() {
if ( $this->mLastRevision !== null ) {
return; // already loaded
}
$latest = $this->getLatest();
if ( !$latest ) {
return; // page doesn't exist or is missing page_latest info
}
// Bug 37225: if session S1 loads the page row FOR UPDATE, the result always includes the
// latest changes committed. This is true even within REPEATABLE-READ transactions, where
// S1 normally only sees changes committed before the first S1 SELECT. Thus we need S1 to
// also gets the revision row FOR UPDATE; otherwise, it may not find it since a page row
// UPDATE and revision row INSERT by S2 may have happened after the first S1 SELECT.
// http://dev.mysql.com/doc/refman/5.0/en/set-transaction.html#isolevel_repeatable-read.
$flags = ( $this->mDataLoadedFrom == self::READ_LOCKING ) ? Revision::READ_LOCKING : 0;
$revision = Revision::newFromPageId( $this->getId(), $latest, $flags );
if ( $revision ) { // sanity
$this->setLastEdit( $revision );
}
}
public function execute()
{
global $wgMemc;
$user = $this->getUser();
$params = $this->extractRequestParams();
$page = $this->getTitleOrPageId($params);
$title = $page->getTitle();
if (!ContentHandler::getForModelID($params['contentmodel'])->isSupportedFormat($params['contentformat'])) {
$this->dieUsage("Unsupported content model/format", 'badmodelformat');
}
// Trim and fix newlines so the key SHA1's match (see RequestContext::getText())
$text = rtrim(str_replace("\r\n", "\n", $params['text']));
$textContent = ContentHandler::makeContent($text, $title, $params['contentmodel'], $params['contentformat']);
$page = WikiPage::factory($title);
if ($page->exists()) {
// Page exists: get the merged content with the proposed change
$baseRev = Revision::newFromPageId($page->getId(), $params['baserevid']);
if (!$baseRev) {
$this->dieUsage("No revision ID {$params['baserevid']}", 'missingrev');
}
$currentRev = $page->getRevision();
if (!$currentRev) {
$this->dieUsage("No current revision of page ID {$page->getId()}", 'missingrev');
}
// Merge in the new version of the section to get the proposed version
$editContent = $page->replaceSectionAtRev($params['section'], $textContent, $params['sectiontitle'], $baseRev->getId());
if (!$editContent) {
$this->dieUsage("Could not merge updated section.", 'replacefailed');
}
if ($currentRev->getId() == $baseRev->getId()) {
// Base revision was still the latest; nothing to merge
$content = $editContent;
} else {
// Merge the edit into the current version
$baseContent = $baseRev->getContent();
$currentContent = $currentRev->getContent();
if (!$baseContent || !$currentContent) {
$this->dieUsage("Missing content for page ID {$page->getId()}", 'missingrev');
}
$handler = ContentHandler::getForModelID($baseContent->getModel());
$content = $handler->merge3($baseContent, $editContent, $currentContent);
}
} else {
// New pages: use the user-provided content model
$content = $textContent;
}
if (!$content) {
// merge3() failed
$this->getResult()->addValue(null, $this->getModuleName(), array('status' => 'editconflict'));
return;
}
// The user will abort the AJAX request by pressing "save", so ignore that
ignore_user_abort(true);
// Get a key based on the source text, format, and user preferences
$key = self::getStashKey($title, $content, $user);
// De-duplicate requests on the same key
if ($user->pingLimiter('stashedit')) {
$status = 'ratelimited';
} elseif ($wgMemc->lock($key, 0, 30)) {
/** @noinspection PhpUnusedLocalVariableInspection */
$unlocker = new ScopedCallback(function () use($key) {
global $wgMemc;
$wgMemc->unlock($key);
});
$status = self::parseAndStash($page, $content, $user);
} else {
$status = 'busy';
}
$this->getResult()->addValue(null, $this->getModuleName(), array('status' => $status));
}
/**
* Determine if we can merge a page.
* We check if an inaccessible revision would become the latest and
* deny the merge if so -- it's theoretically possible to update the
* latest revision, but opens a can of worms -- search engine updates,
* recentchanges review, etc.
*
* @param integer $id The page_id
* @param Title $newTitle The new title
* @param string $logStatus This is set to the log status message on failure
* @return bool
*/
private function canMerge($id, Title $newTitle, &$logStatus)
{
$latestDest = Revision::newFromTitle($newTitle, 0, Revision::READ_LATEST);
$latestSource = Revision::newFromPageId($id, 0, Revision::READ_LATEST);
if ($latestSource->getTimestamp() > $latestDest->getTimestamp()) {
$logStatus = 'cannot merge since source is later';
return false;
} else {
return true;
}
}
/**
* Loads everything except the text
* This isn't necessary for all uses, so it's only done if needed.
*/
protected function loadLastEdit()
{
if ($this->mLastRevision !== null) {
return;
// already loaded
}
$latest = $this->getLatest();
if (!$latest) {
return;
// page doesn't exist or is missing page_latest info
}
$revision = Revision::newFromPageId($this->getId(), $latest);
if ($revision) {
// sanity
$this->setLastEdit($revision);
}
}
public function execute()
{
$user = $this->getUser();
$params = $this->extractRequestParams();
if ($user->isBot()) {
// sanity
$this->dieUsage('This interface is not supported for bots', 'botsnotsupported');
}
$cache = ObjectCache::getLocalClusterInstance();
$page = $this->getTitleOrPageId($params);
$title = $page->getTitle();
if (!ContentHandler::getForModelID($params['contentmodel'])->isSupportedFormat($params['contentformat'])) {
$this->dieUsage('Unsupported content model/format', 'badmodelformat');
}
$text = null;
$textHash = null;
if (strlen($params['stashedtexthash'])) {
// Load from cache since the client indicates the text is the same as last stash
$textHash = $params['stashedtexthash'];
$textKey = $cache->makeKey('stashedit', 'text', $textHash);
$text = $cache->get($textKey);
if (!is_string($text)) {
$this->dieUsage('No stashed text found with the given hash', 'missingtext');
}
} elseif ($params['text'] !== null) {
// Trim and fix newlines so the key SHA1's match (see WebRequest::getText())
$text = rtrim(str_replace("\r\n", "\n", $params['text']));
$textHash = sha1($text);
} else {
$this->dieUsage('The text or stashedtexthash parameter must be given', 'missingtextparam');
}
$textContent = ContentHandler::makeContent($text, $title, $params['contentmodel'], $params['contentformat']);
$page = WikiPage::factory($title);
if ($page->exists()) {
// Page exists: get the merged content with the proposed change
$baseRev = Revision::newFromPageId($page->getId(), $params['baserevid']);
if (!$baseRev) {
$this->dieUsage("No revision ID {$params['baserevid']}", 'missingrev');
}
$currentRev = $page->getRevision();
if (!$currentRev) {
$this->dieUsage("No current revision of page ID {$page->getId()}", 'missingrev');
}
// Merge in the new version of the section to get the proposed version
$editContent = $page->replaceSectionAtRev($params['section'], $textContent, $params['sectiontitle'], $baseRev->getId());
if (!$editContent) {
$this->dieUsage('Could not merge updated section.', 'replacefailed');
}
if ($currentRev->getId() == $baseRev->getId()) {
// Base revision was still the latest; nothing to merge
$content = $editContent;
} else {
// Merge the edit into the current version
$baseContent = $baseRev->getContent();
$currentContent = $currentRev->getContent();
if (!$baseContent || !$currentContent) {
$this->dieUsage("Missing content for page ID {$page->getId()}", 'missingrev');
}
$handler = ContentHandler::getForModelID($baseContent->getModel());
$content = $handler->merge3($baseContent, $editContent, $currentContent);
}
} else {
// New pages: use the user-provided content model
$content = $textContent;
}
if (!$content) {
// merge3() failed
$this->getResult()->addValue(null, $this->getModuleName(), ['status' => 'editconflict']);
return;
}
// The user will abort the AJAX request by pressing "save", so ignore that
ignore_user_abort(true);
if ($user->pingLimiter('stashedit')) {
$status = 'ratelimited';
} else {
$status = self::parseAndStash($page, $content, $user, $params['summary']);
$textKey = $cache->makeKey('stashedit', 'text', $textHash);
$cache->set($textKey, $text, self::MAX_CACHE_TTL);
}
$stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
$stats->increment("editstash.cache_stores.{$status}");
$this->getResult()->addValue(null, $this->getModuleName(), ['status' => $status, 'texthash' => $textHash]);
}
public function execute()
{
$user = $this->getUser();
$params = $this->extractRequestParams();
if ($user->isBot()) {
// sanity
$this->dieUsage('This interface is not supported for bots', 'botsnotsupported');
}
$page = $this->getTitleOrPageId($params);
$title = $page->getTitle();
if (!ContentHandler::getForModelID($params['contentmodel'])->isSupportedFormat($params['contentformat'])) {
$this->dieUsage('Unsupported content model/format', 'badmodelformat');
}
// Trim and fix newlines so the key SHA1's match (see RequestContext::getText())
$text = rtrim(str_replace("\r\n", "\n", $params['text']));
$textContent = ContentHandler::makeContent($text, $title, $params['contentmodel'], $params['contentformat']);
$page = WikiPage::factory($title);
if ($page->exists()) {
// Page exists: get the merged content with the proposed change
$baseRev = Revision::newFromPageId($page->getId(), $params['baserevid']);
if (!$baseRev) {
$this->dieUsage("No revision ID {$params['baserevid']}", 'missingrev');
}
$currentRev = $page->getRevision();
if (!$currentRev) {
$this->dieUsage("No current revision of page ID {$page->getId()}", 'missingrev');
}
// Merge in the new version of the section to get the proposed version
$editContent = $page->replaceSectionAtRev($params['section'], $textContent, $params['sectiontitle'], $baseRev->getId());
if (!$editContent) {
$this->dieUsage('Could not merge updated section.', 'replacefailed');
}
if ($currentRev->getId() == $baseRev->getId()) {
// Base revision was still the latest; nothing to merge
$content = $editContent;
} else {
// Merge the edit into the current version
$baseContent = $baseRev->getContent();
$currentContent = $currentRev->getContent();
if (!$baseContent || !$currentContent) {
$this->dieUsage("Missing content for page ID {$page->getId()}", 'missingrev');
}
$handler = ContentHandler::getForModelID($baseContent->getModel());
$content = $handler->merge3($baseContent, $editContent, $currentContent);
}
} else {
// New pages: use the user-provided content model
$content = $textContent;
}
if (!$content) {
// merge3() failed
$this->getResult()->addValue(null, $this->getModuleName(), ['status' => 'editconflict']);
return;
}
// The user will abort the AJAX request by pressing "save", so ignore that
ignore_user_abort(true);
// Use the master DB for fast blocking locks
$dbw = wfGetDB(DB_MASTER);
// Get a key based on the source text, format, and user preferences
$key = self::getStashKey($title, $content, $user);
// De-duplicate requests on the same key
if ($user->pingLimiter('stashedit')) {
$status = 'ratelimited';
} elseif ($dbw->lock($key, __METHOD__, 1)) {
$status = self::parseAndStash($page, $content, $user);
$dbw->unlock($key, __METHOD__);
} else {
$status = 'busy';
}
$this->getStats()->increment("editstash.cache_stores.{$status}");
$this->getResult()->addValue(null, $this->getModuleName(), ['status' => $status]);
}
