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phorge/src/applications/files/controller/proxy/PhabricatorFileProxyController.php
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PhabricatorFileProxyController.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 PhabricatorFileProxyController extends PhabricatorFileController {
private $uri;
public function processRequest() {
if (!PhabricatorEnv::getEnvConfig('files.enable-proxy')) {
return new Aphront400Response();
}
$request = $this->getRequest();
$uri = $request->getStr('uri');
$proxy = id(new PhabricatorFileProxyImage())->loadOneWhere(
'uri = %s',
$uri);
if (!$proxy) {
// This write is fine to skip CSRF checks for, we're just building a
// cache of some remote image.
$unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
$file = PhabricatorFile::newFromFileDownload(
$uri,
nonempty(basename($uri), 'proxied-file'));
if ($file) {
$proxy = new PhabricatorFileProxyImage();
$proxy->setURI($uri);
$proxy->setFilePHID($file->getPHID());
$proxy->save();
}
unset($unguarded);
}
if ($proxy) {
$file = id(new PhabricatorFile())->loadOneWhere('phid = %s',
$proxy->getFilePHID());
if ($file) {
$view_uri = $file->getBestURI();
} else {
$bad_phid = $proxy->getFilePHID();
throw new Exception(
"Unable to load file with phid {$bad_phid}."
);
}
return id(new AphrontRedirectResponse())->setURI($view_uri);
}
return new Aphront400Response();
}
}

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