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PhabricatorFile.php
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Mon, Jun 2, 17:22

PhabricatorFile.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.
*/
class PhabricatorFile extends PhabricatorFileDAO {
const STORAGE_ENGINE_BLOB = 'blob';
const STORAGE_FORMAT_RAW = 'raw';
// TODO: We need to reconcile this with MySQL packet size.
const FILE_SIZE_BYTE_LIMIT = 12582912;
protected $phid;
protected $name;
protected $mimeType;
protected $byteSize;
protected $storageEngine;
protected $storageFormat;
protected $storageHandle;
public function getConfiguration() {
return array(
self::CONFIG_AUX_PHID => true,
) + parent::getConfiguration();
}
public function generatePHID() {
return PhabricatorPHID::generateNewPHID(
PhabricatorPHIDConstants::PHID_TYPE_FILE);
}
public static function newFromPHPUpload($spec, array $params = array()) {
if (!$spec) {
throw new Exception("No file was uploaded!");
}
$err = idx($spec, 'error');
if ($err) {
throw new Exception("File upload failed with error '{$err}'.");
}
$tmp_name = idx($spec, 'tmp_name');
$is_valid = @is_uploaded_file($tmp_name);
if (!$is_valid) {
throw new Exception("File is not an uploaded file.");
}
$file_data = Filesystem::readFile($tmp_name);
$file_size = idx($spec, 'size');
if (strlen($file_data) != $file_size) {
throw new Exception("File size disagrees with uploaded size.");
}
$file_name = nonempty(
idx($params, 'name'),
idx($spec, 'name'));
$params = array(
'name' => $file_name,
) + $params;
return self::newFromFileData($file_data, $params);
}
public static function newFromFileData($data, array $params = array()) {
$file_size = strlen($data);
if ($file_size > self::FILE_SIZE_BYTE_LIMIT) {
throw new Exception("File is too large to store.");
}
$file_name = idx($params, 'name');
$file_name = self::normalizeFileName($file_name);
$file = new PhabricatorFile();
$file->setName($file_name);
$file->setByteSize(strlen($data));
$blob = new PhabricatorFileStorageBlob();
$blob->setData($data);
$blob->save();
// TODO: This stuff is almost certainly YAGNI, but we could imagine having
// an alternate disk store and gzipping or encrypting things or something
// crazy like that and this isn't toooo much extra code.
$file->setStorageEngine(self::STORAGE_ENGINE_BLOB);
$file->setStorageFormat(self::STORAGE_FORMAT_RAW);
$file->setStorageHandle($blob->getID());
if (isset($params['mime-type'])) {
$file->setMimeType($params['mime-type']);
} else {
try {
$tmp = new TempFile();
Filesystem::writeFile($tmp, $data);
list($stdout) = execx('file -b --mime %s', $tmp);
$file->setMimeType($stdout);
} catch (Exception $ex) {
// Be robust here since we don't really care that much about mime types.
}
}
$file->save();
return $file;
}
public static function newFromFileDownload($uri, $name) {
$uri = new PhutilURI($uri);
$protocol = $uri->getProtocol();
switch ($protocol) {
case 'http':
case 'https':
break;
default:
// Make sure we are not accessing any file:// URIs or similar.
return null;
}
$timeout = stream_context_create(
array(
'http' => array(
'timeout' => 5,
),
));
$file_data = @file_get_contents($uri, false, $timeout);
if ($file_data === false) {
return null;
}
return self::newFromFileData($file_data, array('name' => $name));
}
public static function normalizeFileName($file_name) {
return preg_replace('/[^a-zA-Z0-9.~_-]/', '_', $file_name);
}
public function delete() {
$this->openTransaction();
switch ($this->getStorageEngine()) {
case self::STORAGE_ENGINE_BLOB:
$handle = $this->getStorageHandle();
$blob = id(new PhabricatorFileStorageBlob())->load($handle);
$blob->delete();
break;
default:
throw new Exception("Unknown storage engine!");
}
$ret = parent::delete();
$this->saveTransaction();
return $ret;
}
public function loadFileData() {
$handle = $this->getStorageHandle();
$data = null;
switch ($this->getStorageEngine()) {
case self::STORAGE_ENGINE_BLOB:
$blob = id(new PhabricatorFileStorageBlob())->load($handle);
if (!$blob) {
throw new Exception("Failed to load file blob data.");
}
$data = $blob->getData();
break;
default:
throw new Exception("Unknown storage engine.");
}
switch ($this->getStorageFormat()) {
case self::STORAGE_FORMAT_RAW:
$data = $data;
break;
default:
throw new Exception("Unknown storage format.");
}
return $data;
}
public function getViewURI() {
return PhabricatorFileURI::getViewURIForPHID($this->getPHID());
}
public function getThumb60x45URI() {
return '/file/xform/thumb-60x45/'.$this->getPHID().'/';
}
public function getThumb160x120URI() {
return '/file/xform/thumb-160x120/'.$this->getPHID().'/';
}
public function isViewableInBrowser() {
return ($this->getViewableMimeType() !== null);
}
public function isTransformableImage() {
return preg_match('@^image/(gif|png|jpe?g)@', $this->getViewableMimeType());
}
public function getViewableMimeType() {
$mime_map = PhabricatorEnv::getEnvConfig('files.viewable-mime-types');
$mime_type = $this->getMimeType();
$mime_parts = explode(';', $mime_type);
$mime_type = trim(reset($mime_parts));
return idx($mime_map, $mime_type);
}
}

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