/**
* This is the default action of the index.php entry point: just view the
* page of the given title.
*/
public function view()
{
global $wgParser, $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();
$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");
wfProfileOut(__METHOD__);
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");
wfProfileOut(__METHOD__);
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();
wfProfileOut(__METHOD__);
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, $parserOptions));
}
# Is it client cached?
if ($outputPage->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
$outputPage->disable();
$this->mPage->doViewUpdates($user);
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 ($user->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");
$this->showMissingArticle();
wfProfileOut(__METHOD__);
return;
}
# Try the parser cache
if ($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");
wfProfileOut(__METHOD__);
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();
$outputDone = true;
} elseif (!wfRunHooks('ArticleContentViewCustom', array($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;
} else {
$content = $this->getContentObject();
$rt = $content->getRedirectChain();
if ($rt) {
wfDebug(__METHOD__ . ": showing redirect=no page\n");
# Viewing a redirect page (e.g. with parameter redirect=no)
$outputPage->addHTML($this->viewRedirect($rt));
# Parse just to get categories, displaytitle, etc.
$this->mParserOutput = $content->getParserOutput($this->getTitle(), $oldid, $parserOptions, false);
$outputPage->addParserOutputNoText($this->mParserOutput);
$outputDone = true;
}
}
break;
case 4:
# Run the parse, protected by a pool counter
wfDebug(__METHOD__ . ": doing uncached parse\n");
// @todo: shouldn't we be passing $this->getPage() to PoolWorkArticleView instead of plain $this?
$poolArticleView = new PoolWorkArticleView($this, $parserOptions, $this->getRevIdFetched(), $useParserCache, $this->getContentObject(), $this->getContext());
if (!$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
wfProfileOut(__METHOD__);
return;
}
$this->mParserOutput = $poolArticleView->getParserOutput();
$outputPage->addParserOutput($this->mParserOutput);
# 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* 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);
wfProfileOut(__METHOD__);
}
/**
* Retrieve the ParserOutput from ParserCache.
* false if not found or outdated.
*
* @param WikiPage|Article $article
* @param ParserOptions $popts
* @param bool $useOutdated (default false)
*
* @return ParserOutput|bool False on failure
*/
public function get($article, $popts, $useOutdated = false)
{
global $wgCacheEpoch;
$canCache = $article->checkTouched();
if (!$canCache) {
// It's a redirect now
return false;
}
$touched = $article->getTouched();
$parserOutputKey = $this->getKey($article, $popts, $useOutdated);
if ($parserOutputKey === false) {
wfIncrStats('pcache.miss.absent');
return false;
}
$value = $this->mMemc->get($parserOutputKey);
if (!$value) {
wfDebug("ParserOutput cache miss.\n");
wfIncrStats("pcache.miss.absent");
return false;
}
wfDebug("ParserOutput cache found.\n");
// The edit section preference may not be the appropiate one in
// the ParserOutput, as we are not storing it in the parsercache
// key. Force it here. See bug 31445.
$value->setEditSectionTokens($popts->getEditSection());
$wikiPage = method_exists($article, 'getPage') ? $article->getPage() : $article;
if (!$useOutdated && $value->expired($touched)) {
wfIncrStats("pcache.miss.expired");
$cacheTime = $value->getCacheTime();
wfDebug("ParserOutput key expired, touched {$touched}, " . "epoch {$wgCacheEpoch}, cached {$cacheTime}\n");
$value = false;
} elseif ($value->isDifferentRevision($article->getLatest())) {
wfIncrStats("pcache.miss.revid");
$revId = $article->getLatest();
$cachedRevId = $value->getCacheRevisionId();
wfDebug("ParserOutput key is for an old revision, latest {$revId}, cached {$cachedRevId}\n");
$value = false;
} elseif (Hooks::run('RejectParserCacheValue', array($value, $wikiPage, $popts)) === false) {
wfIncrStats('pcache.miss.rejected');
wfDebug("ParserOutput key valid, but rejected by RejectParserCacheValue hook handler.\n");
$value = false;
} else {
wfIncrStats("pcache.hit");
}
return $value;
}
/**
* 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;
wfProfileIn(__METHOD__);
# Get variables from query string
$oldid = $this->getOldID();
# getOldID may want us to redirect somewhere else
if ($this->mRedirectUrl) {
$wgOut->redirect($this->mRedirectUrl);
wfDebug(__METHOD__ . ": redirecting due to oldid\n");
wfProfileOut(__METHOD__);
return;
}
$wgOut->setArticleFlag(true);
# Set page title (may be overridden by DISPLAYTITLE)
$wgOut->setPageTitle($this->getTitle()->getPrefixedText());
# 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;
}
# Allow frames by default
$wgOut->allowClickjacking();
$parserCache = ParserCache::singleton();
$parserOptions = $this->mPage->getParserOptions();
# Render printable version, use printable version cache
if ($wgOut->isPrintable()) {
$parserOptions->setIsPrintable(true);
$parserOptions->setEditSection(false);
} elseif ($wgUseETag && !$this->getTitle()->quickUserCan('edit')) {
$parserOptions->setEditSection(false);
}
# Try client and file cache
if ($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();
$this->mPage->viewUpdates();
wfProfileOut(__METHOD__);
return;
}
}
if (!$wgUseETag && !$this->getTitle()->quickUserCan('edit')) {
$parserOptions->setEditSection(false);
}
# Should the parser cache be used?
$useParserCache = $this->useParserCache($oldid);
wfDebug('Article::view using parser cache: ' . ($useParserCache ? 'yes' : 'no') . "\n");
if ($wgUser->getStubThreshold()) {
wfIncrStats('pcache_miss_stub');
}
$wasRedirected = $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, &$useParserCache));
break;
case 2:
# Try the parser cache
if ($useParserCache) {
$this->mParserOutput = $parserCache->get($this, $parserOptions);
if ($this->mParserOutput !== false) {
wfDebug(__METHOD__ . ": showing parser cache contents\n");
$wgOut->addParserOutput($this->mParserOutput);
# Ensure that UI elements requiring revision ID have
# the correct version information.
$wgOut->setRevisionId($this->mPage->getLatest());
$outputDone = true;
# Preload timestamp to avoid a DB hit
if (isset($this->mParserOutput->mTimestamp)) {
$this->mPage->setTimestamp($this->mParserOutput->mTimestamp);
}
}
}
break;
case 3:
$text = $this->getContent();
if ($text === false || $this->mPage->getID() == 0) {
wfDebug(__METHOD__ . ": showing missing article\n");
$this->showMissingArticle();
wfProfileOut(__METHOD__);
return;
}
# Another whitelist check in case oldid is altering the title
if (!$this->getTitle()->userCanRead()) {
wfDebug(__METHOD__ . ": denied on secondary read check\n");
$wgOut->loginToUse();
$wgOut->output();
$wgOut->disable();
wfProfileOut(__METHOD__);
return;
}
# Are we looking at an old revision
if ($oldid && !is_null($this->mRevision)) {
$this->setOldSubtitle($oldid);
if (!$this->showDeletedRevisionHeader()) {
wfDebug(__METHOD__ . ": cannot view deleted revision\n");
wfProfileOut(__METHOD__);
return;
}
# If this "old" version is the current, then try the parser cache...
if ($oldid === $this->mPage->getLatest() && $this->useParserCache(false)) {
$this->mParserOutput = $parserCache->get($this, $parserOptions);
if ($this->mParserOutput) {
wfDebug(__METHOD__ . ": showing parser cache for current rev permalink\n");
$wgOut->addParserOutput($this->mParserOutput);
$wgOut->setRevisionId($this->mPage->getLatest());
$outputDone = true;
break;
}
}
}
# Ensure that UI elements requiring revision ID have
# the correct version information.
$wgOut->setRevisionId($this->getRevIdFetched());
# 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;
} else {
$rt = Title::newFromRedirectArray($text);
if ($rt) {
wfDebug(__METHOD__ . ": showing redirect=no page\n");
# Viewing a redirect page (e.g. with parameter redirect=no)
# Don't append the subtitle if this was an old revision
$wgOut->addHTML($this->viewRedirect($rt, !$wasRedirected && $this->isCurrent()));
# 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");
$key = $parserCache->getKey($this, $parserOptions);
$poolArticleView = new PoolWorkArticleView($this, $key, $useParserCache, $parserOptions);
if (!$poolArticleView->execute()) {
# Connection or timeout error
wfProfileOut(__METHOD__);
return;
} else {
$outputDone = true;
}
break;
# Should be unreachable, but just in case...
# Should be unreachable, but just in case...
default:
break 2;
}
}
# Adjust the title if it was set by displaytitle, -{T|}- or language conversion
if ($this->mParserOutput) {
$titleText = $this->mParserOutput->getTitleText();
if (strval($titleText) !== '') {
$wgOut->setPageTitle($titleText);
}
}
# 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()->equals(Title::newMainPage())) {
$msg = wfMessage('pagetitle-view-mainpage')->inContentLanguage();
if (!$msg->isDisabled()) {
$wgOut->setHTMLTitle($msg->title($this->getTitle())->text());
}
}
# Now that we've filled $this->mParserOutput, we know whether
# there are any __NOINDEX__ tags on the page
$policy = $this->getRobotPolicy('view');
$wgOut->setIndexPolicy($policy['index']);
$wgOut->setFollowPolicy($policy['follow']);
$this->showViewFooter();
$this->mPage->viewUpdates();
wfProfileOut(__METHOD__);
}