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phab/src/infrastructure/celerity/controller/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.
*/
/**
* Delivers CSS and JS resources to the browser. This controller handles all
* ##/res/## requests, and manages caching, package construction, and resource
* preprocessing.
*
* @group celerity
*/
final class CelerityResourceController extends AphrontController {
private $path;
private $hash;
private $package;
public function willProcessRequest(array $data) {
$this->path = $data['path'];
$this->hash = $data['hash'];
$this->package = !empty($data['package']);
}
public function processRequest() {
$path = $this->path;
// Sanity checking to keep this from exposing anything sensitive.
$path = preg_replace('@(//|\\.\\.)@', '', $path);
$matches = null;
if (!preg_match('/\.(css|js)$/', $path, $matches)) {
throw new Exception("Only CSS and JS resources may be served.");
}
if (isset($_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());
}
$type = $matches[1];
$root = dirname(phutil_get_library_root('phabricator'));
if ($this->package) {
$map = CelerityResourceMap::getInstance();
$paths = $map->resolvePackage($this->hash);
if (!$paths) {
return new Aphront404Response();
}
try {
$data = array();
foreach ($paths as $package_path) {
$data[] = Filesystem::readFile($root.'/webroot/'.$package_path);
}
$data = implode("\n\n", $data);
} catch (Exception $ex) {
return new Aphront404Response();
}
} else {
try {
$data = Filesystem::readFile($root.'/webroot/'.$path);
} catch (Exception $ex) {
return new Aphront404Response();
}
}
$response = new AphrontFileResponse();
$data = $this->minifyData($data, $type);
$response->setContent($data);
switch ($type) {
case 'css':
$response->setMimeType("text/css; charset=utf-8");
break;
case 'js':
$response->setMimeType("text/javascript; charset=utf-8");
break;
}
return $this->makeResponseCacheable($response);
}
private function makeResponseCacheable(AphrontResponse $response) {
$response->setCacheDurationInSeconds(60 * 60 * 24 * 30);
$response->setLastModified(time());
return $response;
}
private function minifyData($data, $type) {
if (!PhabricatorEnv::getEnvConfig('celerity.minify')) {
return $data;
}
// Some resources won't survive minification (like Raphael.js), and are
// marked so as not to be minified.
if (strpos($data, '@'.'do-not-minify') !== false) {
return $data;
}
switch ($type) {
case 'css':
// Remove comments.
$data = preg_replace('@/\*.*?\*/@s', '', $data);
// Remove whitespace around symbols.
$data = preg_replace('@\s*([{}:;,])\s+@', '\1', $data);
// Remove unnecessary semicolons.
$data = preg_replace('@;}@', '}', $data);
// Replace #rrggbb with #rgb when possible.
$data = preg_replace(
'@#([a-f0-9])\1([a-f0-9])\2([a-f0-9])\3@i',
'#\1\2\3',
$data);
$data = trim($data);
break;
case 'js':
$root = dirname(phutil_get_library_root('phabricator'));
$bin = $root.'/externals/javelin/support/jsxmin/jsxmin';
if (@file_exists($bin)) {
$future = new ExecFuture("{$bin} __DEV__:0");
$future->write($data);
list($err, $result) = $future->resolve();
if (!$err) {
$data = $result;
}
}
break;
}
return $data;
}
}
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