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phorge/src/applications/files/controller/data/PhabricatorFileDataController.php
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PhabricatorFileDataController.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.
*/
final class PhabricatorFileDataController extends PhabricatorFileController {
private $phid;
private $key;
public function willProcessRequest(array $data) {
$this->phid = $data['phid'];
$this->key = $data['key'];
}
public function shouldRequireLogin() {
return false;
}
public function processRequest() {
$request = $this->getRequest();
$alt = PhabricatorEnv::getEnvConfig('security.alternate-file-domain');
$alt_domain = id(new PhutilURI($alt))->getDomain();
if ($alt_domain && ($alt_domain != $request->getHost())) {
return new Aphront400Response();
}
$file = id(new PhabricatorFile())->loadOneWhere(
'phid = %s',
$this->phid);
if (!$file) {
return new Aphront404Response();
}
if (!$file->validateSecretKey($this->key)) {
return new Aphront403Response();
}
$data = $file->loadFileData();
$response = new AphrontFileResponse();
$response->setContent($data);
$response->setCacheDurationInSeconds(60 * 60 * 24 * 30);
$is_view = $file->isViewableInBrowser();
if ($is_view) {
$response->setMimeType($file->getViewableMimeType());
} else {
if (!$request->isHTTPPost()) {
// NOTE: Require POST to download files. We'd rather go full-bore and
// do a real CSRF check, but can't currently authenticate users on the
// file domain. This should blunt any attacks based on iframes, script
// tags, applet tags, etc., at least. Send the user to the "info" page
// if they're using some other method.
return id(new AphrontRedirectResponse())
->setURI(PhabricatorEnv::getProductionURI($file->getBestURI()));
}
$response->setMimeType($file->getMimeType());
$response->setDownload($file->getName());
}
return $response;
}
}

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