334 lines
13 KiB
PHP
334 lines
13 KiB
PHP
<?php
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declare(strict_types = 1);
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// {{{ License
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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// }}}
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namespace App\Core;
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use App\Core\DB\DB;
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use function App\Core\I18n\_m;
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use App\Util\Common;
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use App\Util\Exception\DuplicateFoundException;
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use App\Util\Exception\FileNotAllowedException;
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use App\Util\Exception\NoSuchFileException;
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use App\Util\Exception\NotFoundException;
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use App\Util\Exception\NotStoredLocallyException;
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use App\Util\Exception\ServerException;
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use App\Util\TemporaryFile;
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use Component\Attachment\Entity\Attachment;
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use Symfony\Component\HttpFoundation\BinaryFileResponse;
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use Symfony\Component\HttpFoundation\File\File as SymfonyFile;
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use Symfony\Component\HttpFoundation\HeaderUtils;
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use Symfony\Component\HttpFoundation\Response;
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use Symfony\Component\Mime\MimeTypes;
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/**
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* GNU social's File Abstraction
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*
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* @category Files
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* @package GNUsocial
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*
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* @author Hugo Sales <hugo@hsal.es>
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* @author Diogo Peralta Cordeiro <mail@diogo.site>
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* @copyright 2020-2021 Free Software Foundation, Inc http://www.fsf.org
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
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class GSFile
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{
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/**
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* Perform file validation (checks and normalization), store the given file if needed and increment lives
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*
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* @throws DuplicateFoundException
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*/
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public static function storeFileAsAttachment(TemporaryFile|SymfonyFile $file, bool $check_is_supported_mimetype = true): Attachment
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{
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$hash = null;
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Event::handle('HashFile', [$file->getPathname(), &$hash]);
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try {
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$attachment = DB::findOneBy('attachment', ['filehash' => $hash]);
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// Attachment Exists
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$attachment->livesIncrementAndGet();
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// We had this attachment, but not the file, thus no filename, update meta
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if (\is_null($attachment->getFilename())) {
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$mimetype = $attachment->getMimetype() ?? $file->getMimeType();
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$width = $attachment->getWidth();
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$height = $attachment->getHeight();
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$event_map[$mimetype] = [];
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$major_mime = self::mimetypeMajor($mimetype);
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$event_map[$major_mime] = [];
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if (Common::config('attachments', 'sanitize')) {
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Event::handle('FileSanitizerAvailable', [&$event_map, $mimetype]);
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} else {
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Event::handle('FileMetaAvailable', [&$event_map, $mimetype]);
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}
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// Always prefer specific encoders
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/** @var array<callable(TemporaryFile|SymfonyFile &$file, string &$mimetype, int &$width, int &$height): bool> $encoders */
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$encoders = array_merge($event_map[$mimetype], $event_map[$major_mime]);
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foreach ($encoders as $encoder) {
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// These are all I/O params
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if ($encoder($file, $mimetype, $width, $height)) {
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break; // One successful File type handler plugin is enough
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}
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}
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$attachment->setFilename($hash);
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$attachment->setMimetype($mimetype);
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$attachment->setWidth($width);
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$attachment->setHeight($height);
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$attachment->setSize($file->getSize());
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if (!$check_is_supported_mimetype || self::isMimetypeAllowed($mimetype)) {
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$file->move(Common::config('attachments', 'dir'), $hash);
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DB::persist($attachment);
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} else {
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throw new FileNotAllowedException($mimetype);
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}
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}
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} catch (NotFoundException) {
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// Create an Attachment
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// The following properly gets the mimetype with `file` or other
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// available methods, so should be safe
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$mimetype = mb_substr($file->getMimeType(), 0, 64);
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$width = $height = null;
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$event_map[$mimetype] = [];
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$major_mime = self::mimetypeMajor($mimetype);
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$event_map[$major_mime] = [];
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if (Common::config('attachments', 'sanitize')) {
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Event::handle('FileSanitizerAvailable', [&$event_map, $mimetype]);
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} else {
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Event::handle('FileMetaAvailable', [&$event_map, $mimetype]);
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}
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// Always prefer specific encoders
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$encoders = array_merge($event_map[$mimetype], $event_map[$major_mime]);
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foreach ($encoders as $encoder) {
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if ($encoder($file, $mimetype, $width, $height)) {
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break; // One successful sanitizer is enough
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}
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}
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$attachment = Attachment::create([
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'filehash' => $hash,
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'mimetype' => $mimetype,
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'filename' => $hash,
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'size' => $file->getSize(),
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'width' => $width,
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'height' => $height,
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]);
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if (!$check_is_supported_mimetype || self::isMimetypeAllowed($mimetype)) {
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$file->move(Common::config('attachments', 'dir'), $hash);
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DB::persist($attachment);
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} else {
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$attachment->setFilename(null);
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$attachment->setMimetype(null);
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$attachment->setSize(null);
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$attachment->setWidth(null);
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$attachment->setHeight(null);
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DB::persist($attachment);
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throw new FileNotAllowedException($mimetype);
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}
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Event::handle('AttachmentStoreNew', [&$attachment]);
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}
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return $attachment;
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}
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/**
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* Tests against common config attachment `supported` mimetypes and `ext_blacklist`.
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*
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* @return bool true if allowed, false otherwise
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*/
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public static function isMimetypeAllowed(string $mimetype): bool
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{
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$passed_whitelist = \in_array($mimetype, array_keys(Common::config('attachments', 'supported')));
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$mime = new MimeTypes();
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$passed_blacklist = \count(array_intersect($mime->getExtensions($mimetype), Common::config('attachments', 'ext_blacklist'))) === 0;
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unset($mime);
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return $passed_whitelist && $passed_blacklist;
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}
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/**
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* Include $filepath in the response, for viewing or downloading.
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*
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* @throws ServerException
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*/
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public static function sendFile(string $filepath, string $mimetype, ?string $output_filename, string $disposition = 'inline'): Response
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{
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if (is_file($filepath)) {
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$response = new BinaryFileResponse(
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$filepath,
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Response::HTTP_OK,
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[
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'Content-Description' => 'File Transfer',
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'Content-Type' => $mimetype,
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'Content-Disposition' => HeaderUtils::makeDisposition($disposition, $output_filename ?? _m('Untitled attachment') . '.' . MimeTypes::getDefault()->getExtensions($mimetype)[0]),
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'Cache-Control' => 'public',
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],
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public: true,
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// contentDisposition: $disposition,
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autoEtag: true,
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autoLastModified: true,
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);
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if (Common::config('site', 'x_static_delivery')) {
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// @codeCoverageIgnoreStart
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$response->trustXSendfileTypeHeader();
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// @codeCoverageIgnoreEnd
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}
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return $response;
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} else {
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// @codeCoverageIgnoreStart
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throw new NotStoredLocallyException;
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// @codeCoverageIgnoreEnd
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}
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}
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/**
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* Throw a client exception if the cache key $id doesn't contain
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* exactly one entry
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*/
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public static function error($exception, $id, array $res)
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{
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switch (\count($res)) {
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case 0:
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throw new $exception();
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case 1:
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return $res[0];
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default:
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// @codeCoverageIgnoreStart
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Log::error('Media query returned more than one result for identifier: \"' . $id . '\"');
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throw new ServerException(_m('Internal server error'));
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// @codeCoverageIgnoreEnd
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}
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}
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/**
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* Get the file info by id
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*
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* Returns the file's hash, mimetype and title
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*/
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public static function getFileInfo(int $id)
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{
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return self::error(
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NoSuchFileException::class,
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$id,
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Cache::get(
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"file-info-{$id}",
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function () use ($id) {
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return DB::dql(
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'select at.filename, at.mimetype '
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. 'from Component\Attachment\Entity\Attachment at '
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. 'where at.id = :id',
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['id' => $id],
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);
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},
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),
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);
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}
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// ----- Attachment ------
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/**
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* Get the attachment file info by id
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*
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* Returns the attachment file's hash, mimetype, title and path
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*/
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public static function getAttachmentFileInfo(int $id): array
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{
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$res = self::getFileInfo($id);
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if (!\is_null($res['filename'])) {
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$res['filepath'] = Common::config('attachments', 'dir') . $res['filename'];
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}
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return $res;
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}
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// ------------------------
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/**
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* Get the minor part of a mimetype. image/webp -> image
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*/
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public static function mimetypeMajor(string $mime): string
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{
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return explode('/', self::mimetypeBare($mime))[0];
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}
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/**
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* Get the minor part of a mimetype. image/webp -> webp
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*/
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public static function mimetypeMinor(string $mime): string
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{
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return explode('/', self::mimetypeBare($mime))[1];
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}
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/**
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* Get only the mimetype and not additional info (separated from bare mime with semi-colon)
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*/
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public static function mimetypeBare(string $mimetype): string
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{
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$mimetype = mb_strtolower($mimetype);
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if (($semicolon = mb_strpos($mimetype, ';')) !== false) {
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$mimetype = mb_substr($mimetype, 0, $semicolon);
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}
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return trim($mimetype);
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}
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/**
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* Given an attachment filename and mimetype allows to generate the most appropriate filename.
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*
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* @param string $title Original filename with or without extension
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* @param string $mimetype Original mimetype of the file
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* @param null|string $ext Extension we believe to be best
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* @param bool $force Should we force the extension we believe to be best? Defaults to false
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*
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* @return null|string the most appropriate filename or null if we deem it imposible
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*/
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public static function ensureFilenameWithProperExtension(string $title, string $mimetype, ?string $ext = null, bool $force = false): string|null
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{
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$valid_extensions = MimeTypes::getDefault()->getExtensions($mimetype);
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// If title seems to be a filename with an extension
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$pathinfo = pathinfo($title);
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if ($pathinfo['extension'] ?? '' != '') {
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$title_without_extension = $pathinfo['filename'];
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$original_extension = $pathinfo['extension'];
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if (empty(MimeTypes::getDefault()->getMimeTypes($original_extension)) || !\in_array($original_extension, $valid_extensions)) {
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unset($title_without_extension, $original_extension);
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}
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}
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$fallback = function ($title) use ($ext) {
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if (!\is_null($ext)) {
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return ($title) . ".{$ext}";
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}
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};
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if ($force) {
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return $fallback($title_without_extension ?? $title);
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} else {
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if (isset($original_extension)) {
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return $title;
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} else {
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if (!empty($valid_extensions)) {
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return "{$title}.{$valid_extensions[0]}";
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} else {
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// @codeCoverageIgnoreStart
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return $fallback($title_without_extension ?? $title);
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// @codeCoverageIgnoreEnd
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}
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}
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}
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}
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}
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