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CelerityResourceController.php
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Fri, Jan 31, 10:43

CelerityResourceController.php
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<?php
abstract class CelerityResourceController extends PhabricatorController {
protected function buildResourceTransformer() {
return null;
}
public function shouldRequireLogin() {
return false;
}
public function shouldRequireEnabledUser() {
return false;
}
public function shouldAllowPartialSessions() {
return true;
}
public function shouldAllowLegallyNonCompliantUsers() {
return true;
}
abstract public function getCelerityResourceMap();
protected function serveResource($path, $package_hash = null) {
// Sanity checking to keep this from exposing anything sensitive, since it
// ultimately boils down to disk reads.
if (preg_match('@(//|\.\.)@', $path)) {
return new Aphront400Response();
}
$type = CelerityResourceTransformer::getResourceType($path);
$type_map = self::getSupportedResourceTypes();
if (empty($type_map[$type])) {
throw new Exception('Only static resources may be served.');
}
$dev_mode = PhabricatorEnv::getEnvConfig('phabricator.developer-mode');
if (AphrontRequest::getHTTPHeader('If-Modified-Since') && !$dev_mode) {
// Return a "304 Not Modified". We don't care about the value of this
// field since we never change what resource is served by a given URI.
return $this->makeResponseCacheable(new Aphront304Response());
}
$is_cacheable = (!$dev_mode) &&
$this->isCacheableResourceType($type);
$cache = null;
$data = null;
if ($is_cacheable) {
$cache = PhabricatorCaches::getImmutableCache();
$request_path = $this->getRequest()->getPath();
$cache_key = $this->getCacheKey($request_path);
$data = $cache->getKey($cache_key);
}
if ($data === null) {
$map = $this->getCelerityResourceMap();
if ($map->isPackageResource($path)) {
$resource_names = $map->getResourceNamesForPackageName($path);
if (!$resource_names) {
return new Aphront404Response();
}
try {
$data = array();
foreach ($resource_names as $resource_name) {
$data[] = $map->getResourceDataForName($resource_name);
}
$data = implode("\n\n", $data);
} catch (Exception $ex) {
return new Aphront404Response();
}
} else {
try {
$data = $map->getResourceDataForName($path);
} catch (Exception $ex) {
return new Aphront404Response();
}
}
$xformer = $this->buildResourceTransformer();
if ($xformer) {
$data = $xformer->transformResource($path, $data);
}
if ($cache) {
$cache->setKey($cache_key, $data);
}
}
$response = new AphrontFileResponse();
$response->setContent($data);
$response->setMimeType($type_map[$type]);
// NOTE: This is a piece of magic required to make WOFF fonts work in
// Firefox. Possibly we should generalize this.
if ($type == 'woff' || $type == 'woff2') {
// We could be more tailored here, but it's not currently trivial to
// generate a comprehensive list of valid origins (an install may have
// arbitrarily many Phame blogs, for example), and we lose nothing by
// allowing access from anywhere.
$response->addAllowOrigin('*');
}
return $this->makeResponseCacheable($response);
}
public static function getSupportedResourceTypes() {
return array(
'css' => 'text/css; charset=utf-8',
'js' => 'text/javascript; charset=utf-8',
'png' => 'image/png',
'gif' => 'image/gif',
'jpg' => 'image/jpeg',
'swf' => 'application/x-shockwave-flash',
'woff' => 'font/woff',
'woff2' => 'font/woff2',
'eot' => 'font/eot',
'ttf' => 'font/ttf',
);
}
private function makeResponseCacheable(AphrontResponse $response) {
$response->setCacheDurationInSeconds(60 * 60 * 24 * 30);
$response->setLastModified(time());
return $response;
}
/**
* Is it appropriate to cache the data for this resource type in the fast
* immutable cache?
*
* Generally, text resources (which are small, and expensive to process)
* are cached, while other types of resources (which are large, and cheap
* to process) are not.
*
* @param string Resource type.
* @return bool True to enable caching.
*/
private function isCacheableResourceType($type) {
$types = array(
'js' => true,
'css' => true,
);
return isset($types[$type]);
}
private function getCacheKey($path) {
return 'celerity:'.$path;
}
}

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