public function execute($par)
{
global $wgCompatablesUseESI, $wgUseTidy, $wgAlwaysUseTidy, $wgCompatablesJsonFileUrl;
$this->setHeaders();
$args['topic'] = $this->getRequest()->getVal('topic');
$args['feature'] = $this->getRequest()->getVal('feature');
$args['format'] = $this->getRequest()->getVal('format');
$args['cacheKey'] = wfMemcKey('compatables', $args['format'], $args['topic'], $args['feature']);
// Handle purge requests from admins...
// @TODO: Varnish, which only supports a few bits of ESI, can not handle this
// (https://www.varnish-cache.org/docs/3.0/tutorial/esi.html)
// (https://www.varnish-cache.org/trac/wiki/Future_ESI)
if ($this->getRequest()->getVal('action') === 'purge') {
// See https://github.com/webplatform/mediawiki/issues/16 #TODO
Compatables::memcacheRemove(wfMemcKey('webplatformdocs', 'compatables', 'data', 'full'));
Compatables::memcacheRemove($args['cacheKey']);
try {
$req = MWHttpRequest::factory($wgCompatablesJsonFileUrl, array('method' => 'PURGE'));
$status = $req->execute();
wfDebugLog('CompaTables', 'cURL PURGE done to "' . $wgCompatablesJsonFileUrl);
} catch (Exception $e) {
wfDebugLog('CompaTables', 'Had problems with cURL PURGE to "' . $wgCompatablesJsonFileUrl . '", message ' . $e->getMessage());
// Do nothing
}
if ($wgCompatablesUseESI && $this->getUser()->isAllowed('purgecompatables')) {
// Get the ESI URL prefix to purge
$urlPrefix = SpecialPage::getTitleFor('Compatables')->getFullUrl();
$urlPrefix = wfExpandUrl($urlPrefix, PROTO_INTERNAL);
// Include as an in-band ESI invalidation request
$this->getOutput()->addHtml("\n<esi:invalidate>\n" . "<?xml version=\"1.0\"?>\n" . "<!DOCTYPE INVALIDATION SYSTEM \"internal:///WCSinvalidation.dtd\">\n" . "<INVALIDATION VERSION=\"WCS-1.1\">\n" . "<OBJECT>\n" . Xml::element('ADVANCEDSELECTOR', array('URIPREFIX' => $urlPrefix)) . "\n<ACTION REMOVALTTL=\"0\"/>\n" . "</OBJECT>\n" . "</INVALIDATION>\n" . "</esi:invalidate>\n");
$this->getOutput()->addWikiMsg('compatables-purged');
return;
} else {
throw new PermissionsError('purgecompatables');
}
}
// 1 hour server-side cache max before revalidate
$this->getOutput()->setSquidMaxage(Compatables::MAX_AGE);
// Try to handle IMS GET requests from CDN efficiently
// $data['timestamp'] has been added, to not have to do
// 2 HTTP queries
$data = Compatables::getData();
if ($this->getOutput()->checkLastModified($data['timestamp'])) {
return;
// nothing to send (cache hit)
}
/** ***************************** **/
$cached = Compatables::memcacheRead($args['cacheKey'], $data['hash']);
if ($cached !== false) {
$table = $cached['output'];
} else {
$generated = Compatables::generateCompaTable($data, $args);
if ($wgUseTidy && $parser->getOptions()->getTidy() || $wgAlwaysUseTidy) {
$generated['output'] = MWTidy::tidy($generated['output']);
}
Compatables::memcacheSave($args['cacheKey'], $generated);
$table = $generated['output'];
}
/** ***************************** **/
$this->getOutput()->addHtml('<h1>Compatibility data</h1>');
//$this->getOutput()->addHtml('<pre><nowiki>'.print_r($data,1).'</nowiki></pre>');
if ($this->getRequest()->getBool('foresi')) {
$this->getOutput()->addHtml($table);
$this->getOutput()->setArticleBodyOnly(true);
} else {
$this->getOutput()->addHtml($table);
}
}
/**
* Nuke the uniq value to avoid hitting the preg_replace() for no reason
* @param Parser $parser
*/
public static function onParserClearState(Parser $parser)
{
self::$items = array();
return true;
}
