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PhabricatorS3FileStorageEngine.php
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Fri, Nov 1, 22:11

PhabricatorS3FileStorageEngine.php
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<?php
/*
* Copyright 2011 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.
*/
/**
* Amazon S3 file storage engine. This engine scales well but is relatively
* high-latency since data has to be pulled off S3.
*
* @task impl Implementation
* @task internal Internals
* @group filestorage
*/
final class PhabricatorS3FileStorageEngine
extends PhabricatorFileStorageEngine {
/* -( Implementation )----------------------------------------------------- */
/**
* This engine identifies as "amazon-s3".
*
* @task impl
*/
public function getEngineIdentifier() {
return 'amazon-s3';
}
/**
* Write file data into S3.
* @task impl
*/
public function writeFile($data, array $params) {
$s3 = $this->newS3API();
$name = 'phabricator/'.Filesystem::readRandomCharacters(20);
AphrontWriteGuard::willWrite();
$s3->putObject(
$data,
$this->getBucketName(),
$name,
$acl = 'private');
return $name;
}
/**
* Load a stored blob from S3.
* @task impl
*/
public function readFile($handle) {
$result = $this->newS3API()->getObject(
$this->getBucketName(),
$handle);
return $result->body;
}
/**
* Delete a blob from S3.
* @task impl
*/
public function deleteFile($handle) {
AphrontWriteGuard::willWrite();
$this->newS3API()->deleteObject(
$this->getBucketName(),
$handle);
}
/* -( Internals )---------------------------------------------------------- */
/**
* Retrieve the S3 bucket name.
*
* @task internal
*/
private function getBucketName() {
$bucket = PhabricatorEnv::getEnvConfig('storage.s3.bucket');
if (!$bucket) {
throw new Exception("No 'storage.s3.bucket' specified!");
}
return $bucket;
}
/**
* Create a new S3 API object.
*
* @task internal
*/
private function newS3API() {
$libroot = dirname(phutil_get_library_root('phabricator'));
require_once $libroot.'/externals/s3/S3.php';
$access_key = PhabricatorEnv::getEnvConfig('amazon-s3.access-key');
$secret_key = PhabricatorEnv::getEnvConfig('amazon-s3.secret-key');
if (!$access_key || !$secret_key) {
throw new Exception(
"Specify 'amazon-s3.access-key' and 'amazon-s3.secret-key'!");
}
$s3 = newv(
'S3',
array(
$access_key,
$secret_key,
$use_ssl = true,
));
$s3->setExceptions(true);
return $s3;
}
}

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