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phab/src/infrastructure/celerity/CelerityResourceController.php
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CelerityResourceController.php
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<?php
/*
* Copyright 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
abstract class CelerityResourceController extends PhabricatorController {
abstract protected function getRootDirectory();
protected function buildResourceTransformer() {
return null;
}
public function shouldRequireLogin() {
return false;
}
public function shouldRequireEnabledUser() {
return false;
}
private function getDiskPath($to_resource = null) {
return $this->getRootDirectory().$to_resource;
}
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 = $this->getSupportedResourceTypes();
if (empty($type_map[$type])) {
throw new Exception("Only static resources may be served.");
}
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) &&
!PhabricatorEnv::getEnvConfig('celerity.force-disk-reads')) {
// 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 $this->makeResponseCacheable(new Aphront304Response());
}
if ($package_hash) {
$map = CelerityResourceMap::getInstance();
$paths = $map->resolvePackage($package_hash);
if (!$paths) {
return new Aphront404Response();
}
try {
$data = array();
foreach ($paths as $package_path) {
$disk_path = $this->getDiskPath($package_path);
$data[] = Filesystem::readFile($disk_path);
}
$data = implode("\n\n", $data);
} catch (Exception $ex) {
return new Aphront404Response();
}
} else {
try {
$disk_path = $this->getDiskPath($path);
$data = Filesystem::readFile($disk_path);
} catch (Exception $ex) {
return new Aphront404Response();
}
}
$xformer = $this->buildResourceTransformer();
if ($xformer) {
$data = $xformer->transformResource($path, $data);
}
$response = new AphrontFileResponse();
$response->setContent($data);
$response->setMimeType($type_map[$type]);
return $this->makeResponseCacheable($response);
}
protected function getSupportedResourceTypes() {
return array(
'css' => 'text/css; charset=utf-8',
'js' => 'text/javascript; charset=utf-8',
'png' => 'image/png',
'gif' => 'image/gif',
'jpg' => 'image/jpg',
'swf' => 'application/x-shockwave-flash',
);
}
private function makeResponseCacheable(AphrontResponse $response) {
$response->setCacheDurationInSeconds(60 * 60 * 24 * 30);
$response->setLastModified(time());
return $response;
}
}
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