/**
* Send out code for a response from file cache if possible.
*
* @param ResourceFileCache $fileCache Cache object for this request URL
* @param ResourceLoaderContext $context Context in which to generate a response
* @param string $etag ETag header value
* @return bool If this found a cache file and handled the response
*/
protected function tryRespondFromFileCache(ResourceFileCache $fileCache, ResourceLoaderContext $context, $etag)
{
$rlMaxage = $this->config->get('ResourceLoaderMaxage');
// Buffer output to catch warnings.
ob_start();
// Get the maximum age the cache can be
$maxage = is_null($context->getVersion()) ? $rlMaxage['unversioned']['server'] : $rlMaxage['versioned']['server'];
// Minimum timestamp the cache file must have
$good = $fileCache->isCacheGood(wfTimestamp(TS_MW, time() - $maxage));
if (!$good) {
try {
// RL always hits the DB on file cache miss...
wfGetDB(DB_SLAVE);
} catch (DBConnectionError $e) {
// ...check if we need to fallback to cache
$good = $fileCache->isCacheGood();
// cache existence check
}
}
if ($good) {
$ts = $fileCache->cacheTimestamp();
// Send content type and cache headers
$this->sendResponseHeaders($context, $etag, false);
$response = $fileCache->fetchText();
// Capture any PHP warnings from the output buffer and append them to the
// response in a comment if we're in debug mode.
if ($context->getDebug() && strlen($warnings = ob_get_contents())) {
$response = self::makeComment($warnings) . $response;
}
// Remove the output buffer and output the response
ob_end_clean();
echo $response . "\n/* Cached {$ts} */";
return true;
// cache hit
}
// Clear buffer
ob_end_clean();
return false;
// cache miss
}
/**
* Send out code for a response from file cache if possible
*
* @param $fileCache ResourceFileCache: Cache object for this request URL
* @param $context ResourceLoaderContext: Context in which to generate a response
* @return bool If this found a cache file and handled the response
*/
protected function tryRespondFromFileCache(ResourceFileCache $fileCache, ResourceLoaderContext $context)
{
global $wgResourceLoaderMaxage;
// Buffer output to catch warnings.
ob_start();
// Get the maximum age the cache can be
$maxage = is_null($context->getVersion()) ? $wgResourceLoaderMaxage['unversioned']['server'] : $wgResourceLoaderMaxage['versioned']['server'];
// Minimum timestamp the cache file must have
$good = $fileCache->isCacheGood(wfTimestamp(TS_MW, time() - $maxage));
if (!$good) {
try {
// RL always hits the DB on file cache miss...
wfGetDB(DB_SLAVE);
} catch (DBConnectionError $e) {
// ...check if we need to fallback to cache
$good = $fileCache->isCacheGood();
// cache existence check
}
}
if ($good) {
$ts = $fileCache->cacheTimestamp();
// Send content type and cache headers
$this->sendResponseHeaders($context, $ts, false);
// If there's an If-Modified-Since header, respond with a 304 appropriately
if ($this->tryRespondLastModified($context, $ts)) {
return false;
// output handled (buffers cleared)
}
$response = $fileCache->fetchText();
// Capture any PHP warnings from the output buffer and append them to the
// response in a comment if we're in debug mode.
if ($context->getDebug() && strlen($warnings = ob_get_contents())) {
$response = "/*\n{$warnings}\n*/\n" . $response;
}
// Remove the output buffer and output the response
ob_end_clean();
echo $response . "\n/* Cached {$ts} */";
return true;
// cache hit
}
// Clear buffer
ob_end_clean();
return false;
// cache miss
}
