/**
* This is the default action of the index.php entry point: just view the
* page of the given title.
*/
public function view()
{
global $wgUseFileCache, $wgUseETag, $wgDebugToolbar, $wgMaxRedirects;
# Get variables from query string
# As side effect this will load the revision and update the title
# in a revision ID is passed in the request, so this should remain
# the first call of this method even if $oldid is used way below.
$oldid = $this->getOldID();
$user = $this->getContext()->getUser();
# Another whitelist check in case getOldID() is altering the title
$permErrors = $this->getTitle()->getUserPermissionsErrors('read', $user);
if (count($permErrors)) {
wfDebug(__METHOD__ . ": denied on secondary read check\n");
throw new PermissionsError('read', $permErrors);
}
$outputPage = $this->getContext()->getOutput();
# getOldID() may as well want us to redirect somewhere else
if ($this->mRedirectUrl) {
$outputPage->redirect($this->mRedirectUrl);
wfDebug(__METHOD__ . ": redirecting due to oldid\n");
return;
}
# If we got diff in the query, we want to see a diff page instead of the article.
if ($this->getContext()->getRequest()->getCheck('diff')) {
wfDebug(__METHOD__ . ": showing diff page\n");
$this->showDiffPage();
return;
}
# Set page title (may be overridden by DISPLAYTITLE)
$outputPage->setPageTitle($this->getTitle()->getPrefixedText());
$outputPage->setArticleFlag(true);
# Allow frames by default
$outputPage->allowClickjacking();
$parserCache = ParserCache::singleton();
$parserOptions = $this->getParserOptions();
# Render printable version, use printable version cache
if ($outputPage->isPrintable()) {
$parserOptions->setIsPrintable(true);
$parserOptions->setEditSection(false);
} elseif (!$this->isCurrent() || !$this->getTitle()->quickUserCan('edit', $user)) {
$parserOptions->setEditSection(false);
}
# Try client and file cache
if (!$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched()) {
if ($wgUseETag) {
$outputPage->setETag($parserCache->getETag($this, $parserOptions));
}
# Use the greatest of the page's timestamp or the timestamp of any
# redirect in the chain (bug 67849)
$timestamp = $this->mPage->getTouched();
if (isset($this->mRedirectedFrom)) {
$timestamp = max($timestamp, $this->mRedirectedFrom->getTouched());
# If there can be more than one redirect in the chain, we have
# to go through the whole chain too in case an intermediate
# redirect was changed.
if ($wgMaxRedirects > 1) {
$titles = Revision::newFromTitle($this->mRedirectedFrom)->getContent(Revision::FOR_THIS_USER, $user)->getRedirectChain();
$thisTitle = $this->getTitle();
foreach ($titles as $title) {
if (Title::compare($title, $thisTitle) === 0) {
break;
}
$timestamp = max($timestamp, $title->getTouched());
}
}
}
# Is it client cached?
if ($outputPage->checkLastModified($timestamp)) {
wfDebug(__METHOD__ . ": done 304\n");
return;
# Try file cache
} elseif ($wgUseFileCache && $this->tryFileCache()) {
wfDebug(__METHOD__ . ": done file cache\n");
# tell wgOut that output is taken care of
$outputPage->disable();
$this->mPage->doViewUpdates($user, $oldid);
return;
}
}
# Should the parser cache be used?
$useParserCache = $this->mPage->shouldCheckParserCache($parserOptions, $oldid);
wfDebug('Article::view using parser cache: ' . ($useParserCache ? 'yes' : 'no') . "\n");
if ($user->getStubThreshold()) {
$this->getContext()->getStats()->increment('pcache_miss_stub');
}
$this->showRedirectedFromHeader();
$this->showNamespaceHeader();
# Iterate through the possible ways of constructing the output text.
# Keep going until $outputDone is set, or we run out of things to do.
$pass = 0;
$outputDone = false;
$this->mParserOutput = false;
while (!$outputDone && ++$pass) {
switch ($pass) {
case 1:
Hooks::run('ArticleViewHeader', array(&$this, &$outputDone, &$useParserCache));
break;
case 2:
# Early abort if the page doesn't exist
if (!$this->mPage->exists()) {
wfDebug(__METHOD__ . ": showing missing article\n");
$this->showMissingArticle();
$this->mPage->doViewUpdates($user);
return;
}
# Try the parser cache
if ($useParserCache) {
$this->mParserOutput = $parserCache->get($this, $parserOptions);
if ($this->mParserOutput !== false) {
if ($oldid) {
wfDebug(__METHOD__ . ": showing parser cache contents for current rev permalink\n");
$this->setOldSubtitle($oldid);
} else {
wfDebug(__METHOD__ . ": showing parser cache contents\n");
}
$outputPage->addParserOutput($this->mParserOutput);
# Ensure that UI elements requiring revision ID have
# the correct version information.
$outputPage->setRevisionId($this->mPage->getLatest());
# Preload timestamp to avoid a DB hit
$cachedTimestamp = $this->mParserOutput->getTimestamp();
if ($cachedTimestamp !== null) {
$outputPage->setRevisionTimestamp($cachedTimestamp);
$this->mPage->setTimestamp($cachedTimestamp);
}
$outputDone = true;
}
}
break;
case 3:
# This will set $this->mRevision if needed
$this->fetchContentObject();
# Are we looking at an old revision
if ($oldid && $this->mRevision) {
$this->setOldSubtitle($oldid);
if (!$this->showDeletedRevisionHeader()) {
wfDebug(__METHOD__ . ": cannot view deleted revision\n");
return;
}
}
# Ensure that UI elements requiring revision ID have
# the correct version information.
$outputPage->setRevisionId($this->getRevIdFetched());
# Preload timestamp to avoid a DB hit
$outputPage->setRevisionTimestamp($this->getTimestamp());
# Pages containing custom CSS or JavaScript get special treatment
if ($this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage()) {
wfDebug(__METHOD__ . ": showing CSS/JS source\n");
$this->showCssOrJsPage();
$outputDone = true;
} elseif (!Hooks::run('ArticleContentViewCustom', array($this->fetchContentObject(), $this->getTitle(), $outputPage))) {
# Allow extensions do their own custom view for certain pages
$outputDone = true;
} elseif (!ContentHandler::runLegacyHooks('ArticleViewCustom', array($this->fetchContentObject(), $this->getTitle(), $outputPage))) {
# Allow extensions do their own custom view for certain pages
$outputDone = true;
}
break;
case 4:
# Run the parse, protected by a pool counter
wfDebug(__METHOD__ . ": doing uncached parse\n");
$content = $this->getContentObject();
$poolArticleView = new PoolWorkArticleView($this->getPage(), $parserOptions, $this->getRevIdFetched(), $useParserCache, $content);
if (!$poolArticleView->execute()) {
$error = $poolArticleView->getError();
if ($error) {
$outputPage->clearHTML();
// for release() errors
$outputPage->enableClientCache(false);
$outputPage->setRobotPolicy('noindex,nofollow');
$errortext = $error->getWikiText(false, 'view-pool-error');
$outputPage->addWikiText('<div class="errorbox">' . $errortext . '</div>');
}
# Connection or timeout error
return;
}
$this->mParserOutput = $poolArticleView->getParserOutput();
$outputPage->addParserOutput($this->mParserOutput);
if ($content->getRedirectTarget()) {
$outputPage->addSubtitle("<span id=\"redirectsub\">" . $this->getContext()->msg('redirectpagesub')->parse() . "</span>");
}
# Don't cache a dirty ParserOutput object
if ($poolArticleView->getIsDirty()) {
$outputPage->setSquidMaxage(0);
$outputPage->addHTML("<!-- parser cache is expired, " . "sending anyway due to pool overload-->\n");
}
$outputDone = true;
break;
# Should be unreachable, but just in case...
# Should be unreachable, but just in case...
default:
break 2;
}
}
# Get the ParserOutput actually *displayed* here.
# Note that $this->mParserOutput is the *current*/oldid version output.
$pOutput = $outputDone instanceof ParserOutput ? $outputDone : $this->mParserOutput;
# Adjust title for main page & pages with displaytitle
if ($pOutput) {
$this->adjustDisplayTitle($pOutput);
}
# For the main page, overwrite the <title> element with the con-
# tents of 'pagetitle-view-mainpage' instead of the default (if
# that's not empty).
# This message always exists because it is in the i18n files
if ($this->getTitle()->isMainPage()) {
$msg = wfMessage('pagetitle-view-mainpage')->inContentLanguage();
if (!$msg->isDisabled()) {
$outputPage->setHTMLTitle($msg->title($this->getTitle())->text());
}
}
# Check for any __NOINDEX__ tags on the page using $pOutput
$policy = $this->getRobotPolicy('view', $pOutput);
$outputPage->setIndexPolicy($policy['index']);
$outputPage->setFollowPolicy($policy['follow']);
$this->showViewFooter();
$this->mPage->doViewUpdates($user, $oldid);
$outputPage->addModules('mediawiki.action.view.postEdit');
}
/**
* This is the default action of the index.php entry point: just view the
* page of the given title.
*/
public function view()
{
global $wgUser, $wgOut, $wgRequest, $wgParser;
global $wgUseFileCache, $wgUseETag, $wgDebugToolbar;
wfProfileIn(__METHOD__);
# Get variables from query string
# As side effect this will load the revision and update the title
# in a revision ID is passed in the request, so this should remain
# the first call of this method even if $oldid is used way below.
$oldid = $this->getOldID();
# Another whitelist check in case getOldID() is altering the title
$permErrors = $this->getTitle()->getUserPermissionsErrors('read', $wgUser);
if (count($permErrors)) {
wfDebug(__METHOD__ . ": denied on secondary read check\n");
wfProfileOut(__METHOD__);
throw new PermissionsError('read', $permErrors);
}
# getOldID() may as well want us to redirect somewhere else
if ($this->mRedirectUrl) {
$wgOut->redirect($this->mRedirectUrl);
wfDebug(__METHOD__ . ": redirecting due to oldid\n");
wfProfileOut(__METHOD__);
return;
}
# If we got diff in the query, we want to see a diff page instead of the article.
if ($wgRequest->getCheck('diff')) {
wfDebug(__METHOD__ . ": showing diff page\n");
$this->showDiffPage();
wfProfileOut(__METHOD__);
return;
}
# Set page title (may be overridden by DISPLAYTITLE)
$wgOut->setPageTitle($this->getTitle()->getPrefixedText());
$wgOut->setArticleFlag(true);
# Allow frames by default
$wgOut->allowClickjacking();
$parserCache = ParserCache::singleton();
$parserOptions = $this->getParserOptions();
# Render printable version, use printable version cache
if ($wgOut->isPrintable()) {
$parserOptions->setIsPrintable(true);
$parserOptions->setEditSection(false);
} elseif (!$this->isCurrent() || !$this->getTitle()->quickUserCan('edit')) {
$parserOptions->setEditSection(false);
}
# Try client and file cache
if (!$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched()) {
if ($wgUseETag) {
$wgOut->setETag($parserCache->getETag($this, $parserOptions));
}
# Is it client cached?
if ($wgOut->checkLastModified($this->mPage->getTouched())) {
wfDebug(__METHOD__ . ": done 304\n");
wfProfileOut(__METHOD__);
return;
# Try file cache
} elseif ($wgUseFileCache && $this->tryFileCache()) {
wfDebug(__METHOD__ . ": done file cache\n");
# tell wgOut that output is taken care of
$wgOut->disable();
$this->mPage->doViewUpdates($wgUser);
wfProfileOut(__METHOD__);
return;
}
}
# Should the parser cache be used?
$useParserCache = $this->mPage->isParserCacheUsed($parserOptions, $oldid);
wfDebug('Article::view using parser cache: ' . ($useParserCache ? 'yes' : 'no') . "\n");
if ($wgUser->getStubThreshold()) {
wfIncrStats('pcache_miss_stub');
}
$this->showRedirectedFromHeader();
$this->showNamespaceHeader();
# Iterate through the possible ways of constructing the output text.
# Keep going until $outputDone is set, or we run out of things to do.
$pass = 0;
$outputDone = false;
$this->mParserOutput = false;
while (!$outputDone && ++$pass) {
switch ($pass) {
case 1:
wfRunHooks('ArticleViewHeader', array(&$this, &$outputDone, &$useParserCache));
break;
case 2:
# Early abort if the page doesn't exist
if (!$this->mPage->exists()) {
wfDebug(__METHOD__ . ": showing missing article\n");
$this->showMissingArticle();
wfProfileOut(__METHOD__);
/* Wikia change begin - @author: Marcin, #BugId: 30436 */
$text = '';
if (wfRunHooks('ArticleNonExistentPage', array(&$this, $wgOut, &$text))) {
$this->mParserOutput = $wgParser->parse($text, $this->getTitle(), $parserOptions);
$wgOut->addParserOutput($this->mParserOutput);
}
/* Wikia change end */
return;
}
# Try the parser cache
if ($useParserCache) {
$this->mParserOutput = $parserCache->get($this, $parserOptions);
//Wikia Change
Transaction::setAttribute(Transaction::PARAM_PARSER_CACHE_USED, $this->mParserOutput !== false);
//Wikia Change End
if ($this->mParserOutput !== false) {
if ($oldid) {
wfDebug(__METHOD__ . ": showing parser cache contents for current rev permalink\n");
$this->setOldSubtitle($oldid);
} else {
wfDebug(__METHOD__ . ": showing parser cache contents\n");
}
$wgOut->addParserOutput($this->mParserOutput);
// Wikia change - begin - @author: wladek
wfRunHooks('ArticleViewAddParserOutput', array($this, $this->mParserOutput));
// Wikia change - end
# Ensure that UI elements requiring revision ID have
# the correct version information.
$wgOut->setRevisionId($this->mPage->getLatest());
# Preload timestamp to avoid a DB hit
$cachedTimestamp = $this->mParserOutput->getTimestamp();
if ($cachedTimestamp !== null) {
$wgOut->setRevisionTimestamp($cachedTimestamp);
$this->mPage->setTimestamp($cachedTimestamp);
}
$outputDone = true;
}
// Wikia change - begin - @author: wladek
} else {
Transaction::setAttribute(Transaction::PARAM_PARSER_CACHE_USED, false);
// Wikia change - end
}
break;
case 3:
# This will set $this->mRevision if needed
$this->fetchContent();
// Wikia change - begin
// @author macbre
// return status different than HTTP 200 when revision is missing (BAC-630)
if (!$this->mRevision instanceof Revision) {
global $wgEnableParserCache;
wfDebug(__METHOD__ . ": no revision found - disabling parser cache and returning 404\n");
$wgOut->getRequest()->response()->header('X-Missing-Revision: 1', true, 404);
$useParserCache = false;
$wgEnableParserCache = false;
}
// Wikia change - end
# Are we looking at an old revision
if ($oldid && $this->mRevision) {
$this->setOldSubtitle($oldid);
if (!$this->showDeletedRevisionHeader()) {
wfDebug(__METHOD__ . ": cannot view deleted revision\n");
wfProfileOut(__METHOD__);
return;
}
}
# Ensure that UI elements requiring revision ID have
# the correct version information.
$wgOut->setRevisionId($this->getRevIdFetched());
# Preload timestamp to avoid a DB hit
$wgOut->setRevisionTimestamp($this->getTimestamp());
# Pages containing custom CSS or JavaScript get special treatment
if ($this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage()) {
wfDebug(__METHOD__ . ": showing CSS/JS source\n");
$this->showCssOrJsPage();
$outputDone = true;
} elseif (!wfRunHooks('ArticleViewCustom', array($this->mContent, $this->getTitle(), $wgOut))) {
# Allow extensions do their own custom view for certain pages
$outputDone = true;
} else {
$text = $this->getContent();
$rt = Title::newFromRedirectArray($text);
if ($rt) {
wfDebug(__METHOD__ . ": showing redirect=no page\n");
# Viewing a redirect page (e.g. with parameter redirect=no)
$wgOut->addHTML($this->viewRedirect($rt));
# Parse just to get categories, displaytitle, etc.
$this->mParserOutput = $wgParser->parse($text, $this->getTitle(), $parserOptions);
$wgOut->addParserOutputNoText($this->mParserOutput);
$outputDone = true;
}
}
break;
case 4:
# Run the parse, protected by a pool counter
wfDebug(__METHOD__ . ": doing uncached parse\n");
$poolArticleView = new PoolWorkArticleView($this, $parserOptions, $this->getRevIdFetched(), $useParserCache, $this->getContent());
if (!$poolArticleView->execute()) {
$error = $poolArticleView->getError();
if ($error) {
$wgOut->clearHTML();
// for release() errors
$wgOut->enableClientCache(false);
$wgOut->setRobotPolicy('noindex,nofollow');
$errortext = $error->getWikiText(false, 'view-pool-error');
$wgOut->addWikiText('<div class="errorbox">' . $errortext . '</div>');
}
# Connection or timeout error
wfProfileOut(__METHOD__);
return;
}
$this->mParserOutput = $poolArticleView->getParserOutput();
$wgOut->addParserOutput($this->mParserOutput);
// Wikia change - begin - @author: wladek
Transaction::setAttribute(Transaction::PARAM_PARSER_CACHE_USED, $poolArticleView->getIsDirty());
wfRunHooks('ArticleViewAddParserOutput', array($this, $this->mParserOutput));
// Wikia change - end
# Don't cache a dirty ParserOutput object
if ($poolArticleView->getIsDirty()) {
$wgOut->setSquidMaxage(0);
$wgOut->addHTML("<!-- parser cache is expired, sending anyway due to pool overload-->\n");
}
# <Wikia>
if (!$poolArticleView->getIsDirty()) {
wfRunHooks('ArticleViewAfterParser', array($this, $this->mParserOutput));
}
# </Wikia>
$outputDone = true;
break;
# Should be unreachable, but just in case...
# Should be unreachable, but just in case...
default:
break 2;
}
}
# Get the ParserOutput actually *displayed* here.
# Note that $this->mParserOutput is the *current* version output.
$pOutput = $outputDone instanceof ParserOutput ? $outputDone : $this->mParserOutput;
# Adjust title for main page & pages with displaytitle
if ($pOutput) {
$this->adjustDisplayTitle($pOutput);
if ($pOutput->getText() == '') {
\Wikia\Logger\WikiaLogger::instance()->error('PLATFORM-1212 - empty parser output');
}
}
# For the main page, overwrite the <title> element with the con-
# tents of 'pagetitle-view-mainpage' instead of the default (if
# that's not empty).
# This message always exists because it is in the i18n files
if ($this->getTitle()->isMainPage()) {
$msg = wfMessage('pagetitle-view-mainpage')->inContentLanguage();
if (!$msg->isDisabled()) {
$wgOut->setHTMLTitle($msg->title($this->getTitle())->text());
}
}
# Check for any __NOINDEX__ tags on the page using $pOutput
$policy = $this->getRobotPolicy('view', $pOutput);
$wgOut->setIndexPolicy($policy['index']);
$wgOut->setFollowPolicy($policy['follow']);
$this->showViewFooter();
$this->mPage->doViewUpdates($wgUser);
wfProfileOut(__METHOD__);
}
/**
* Build a value to store in memcached based on the PST content and parser output
*
* This makes a simple version of WikiPage::prepareContentForEdit() as stash info
*
* @param Content $pstContent
* @param ParserOutput $parserOutput
* @param string $timestamp TS_MW
* @return array (stash info array, TTL in seconds) or (null, 0)
*/
protected static function buildStashValue(Content $pstContent, ParserOutput $parserOutput, $timestamp)
{
// If an item is renewed, mind the cache TTL determined by config and parser functions
$since = time() - wfTimestamp(TS_UNIX, $parserOutput->getTimestamp());
$ttl = min($parserOutput->getCacheExpiry() - $since, 5 * 60);
if ($ttl > 0 && !$parserOutput->getFlag('vary-revision')) {
// Only store what is actually needed
$stashInfo = (object) array('pstContent' => $pstContent, 'output' => $parserOutput, 'timestamp' => $timestamp);
return array($stashInfo, $ttl);
}
return array(null, 0);
}
/**
* Build a value to store in memcached based on the PST content and parser output
*
* This makes a simple version of WikiPage::prepareContentForEdit() as stash info
*
* @param Content $pstContent Pre-Save transformed content
* @param ParserOutput $parserOutput
* @param string $timestamp TS_MW
* @param User $user
* @return array (stash info array, TTL in seconds, info code) or (null, 0, info code)
*/
private static function buildStashValue(Content $pstContent, ParserOutput $parserOutput, $timestamp, User $user)
{
// If an item is renewed, mind the cache TTL determined by config and parser functions.
// Put an upper limit on the TTL for sanity to avoid extreme template/file staleness.
$since = time() - wfTimestamp(TS_UNIX, $parserOutput->getTimestamp());
$ttl = min($parserOutput->getCacheExpiry() - $since, self::MAX_CACHE_TTL);
if ($ttl <= 0) {
return [null, 0, 'no_ttl'];
}
// Only store what is actually needed
$stashInfo = (object) ['pstContent' => $pstContent, 'output' => $parserOutput, 'timestamp' => $timestamp, 'edits' => $user->getEditCount()];
return [$stashInfo, $ttl, 'ok'];
}
