387 lines
16 KiB
PHP
387 lines
16 KiB
PHP
<?php
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/**
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* StatusNet, the distributed open-source microblogging tool
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*
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* Abstraction for media files in general
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*
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* TODO: combine with ImageFile?
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*
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* PHP version 5
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*
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* LICENCE: This program 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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* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Media
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* @package StatusNet
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* @author Robin Millette <robin@millette.info>
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* @author Zach Copley <zach@status.net>
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* @copyright 2008-2009 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*/
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if (!defined('GNUSOCIAL')) { exit(1); }
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class MediaFile
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{
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protected $scoped = null;
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var $filename = null;
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var $fileRecord = null;
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var $fileurl = null;
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var $short_fileurl = null;
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var $mimetype = null;
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function __construct($filename = null, $mimetype = null, $filehash = null)
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{
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$this->filename = $filename;
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$this->mimetype = $mimetype;
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$this->filehash = $filehash;
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$this->fileRecord = $this->storeFile();
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$this->fileurl = common_local_url('attachment',
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array('attachment' => $this->fileRecord->id));
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$this->maybeAddRedir($this->fileRecord->id, $this->fileurl);
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$this->short_fileurl = common_shorten_url($this->fileurl);
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$this->maybeAddRedir($this->fileRecord->id, $this->short_fileurl);
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}
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public function attachToNotice(Notice $notice)
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{
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File_to_post::processNew($this->fileRecord, $notice);
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}
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public function getPath()
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{
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return File::path($this->filename);
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}
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function shortUrl()
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{
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return $this->short_fileurl;
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}
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function getEnclosure()
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{
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return $this->getFile()->getEnclosure();
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}
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function delete()
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{
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$filepath = File::path($this->filename);
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@unlink($filepath);
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}
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public function getFile()
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{
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if (!$this->fileRecord instanceof File) {
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throw new ServerException('File record did not exist for MediaFile');
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}
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return $this->fileRecord;
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}
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protected function storeFile()
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{
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$filepath = File::path($this->filename);
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if (!empty($this->filename) && $this->filehash === null) {
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// Calculate if we have an older upload method somewhere (Qvitter) that
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// doesn't do this before calling new MediaFile on its local files...
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$this->filehash = hash_file(File::FILEHASH_ALG, $filepath);
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if ($this->filehash === false) {
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throw new ServerException('Could not read file for hashing');
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}
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}
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try {
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$file = File::getByHash($this->filehash);
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// We're done here. Yes. Already. We assume sha256 won't collide on us anytime soon.
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return $file;
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} catch (NoResultException $e) {
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// Well, let's just continue below.
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}
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$fileurl = File::url($this->filename);
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$file = new File;
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$file->filename = $this->filename;
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$file->urlhash = File::hashurl($fileurl);
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$file->url = $fileurl;
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$file->filehash = $this->filehash;
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$file->size = filesize($filepath);
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if ($file->size === false) {
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throw new ServerException('Could not read file to get its size');
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}
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$file->date = time();
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$file->mimetype = $this->mimetype;
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$file_id = $file->insert();
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if ($file_id===false) {
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common_log_db_error($file, "INSERT", __FILE__);
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// TRANS: Client exception thrown when a database error was thrown during a file upload operation.
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throw new ClientException(_('There was a database error while saving your file. Please try again.'));
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}
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// Set file geometrical properties if available
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try {
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$image = ImageFile::fromFileObject($file);
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$orig = clone($file);
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$file->width = $image->width;
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$file->height = $image->height;
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$file->update($orig);
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// We have to cleanup after ImageFile, since it
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// may have generated a temporary file from a
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// video support plugin or something.
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// FIXME: Do this more automagically.
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if ($image->getPath() != $file->getPath()) {
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$image->unlink();
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}
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} catch (ServerException $e) {
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// We just couldn't make out an image from the file. This
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// does not have to be UnsupportedMediaException, as we can
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// also get ServerException from files not existing etc.
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}
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return $file;
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}
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function rememberFile($file, $short)
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{
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$this->maybeAddRedir($file->id, $short);
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}
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function maybeAddRedir($file_id, $url)
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{
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try {
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$file_redir = File_redirection::getByUrl($url);
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} catch (NoResultException $e) {
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$file_redir = new File_redirection;
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$file_redir->urlhash = File::hashurl($url);
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$file_redir->url = $url;
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$file_redir->file_id = $file_id;
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$result = $file_redir->insert();
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if ($result===false) {
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common_log_db_error($file_redir, "INSERT", __FILE__);
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// TRANS: Client exception thrown when a database error was thrown during a file upload operation.
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throw new ClientException(_('There was a database error while saving your file. Please try again.'));
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}
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}
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}
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static function fromUpload($param='media', Profile $scoped=null)
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{
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// The existence of the "error" element means PHP has processed it properly even if it was ok.
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if (!isset($_FILES[$param]) || !isset($_FILES[$param]['error'])) {
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throw new NoUploadedMediaException($param);
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}
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switch ($_FILES[$param]['error']) {
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case UPLOAD_ERR_OK: // success, jump out
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break;
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case UPLOAD_ERR_INI_SIZE:
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// TRANS: Client exception thrown when an uploaded file is larger than set in php.ini.
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throw new ClientException(_('The uploaded file exceeds the ' .
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'upload_max_filesize directive in php.ini.'));
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case UPLOAD_ERR_FORM_SIZE:
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throw new ClientException(
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// TRANS: Client exception.
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_('The uploaded file exceeds the MAX_FILE_SIZE directive' .
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' that was specified in the HTML form.'));
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case UPLOAD_ERR_PARTIAL:
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@unlink($_FILES[$param]['tmp_name']);
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// TRANS: Client exception.
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throw new ClientException(_('The uploaded file was only' .
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' partially uploaded.'));
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case UPLOAD_ERR_NO_FILE:
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// No file; probably just a non-AJAX submission.
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throw new NoUploadedMediaException($param);
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case UPLOAD_ERR_NO_TMP_DIR:
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// TRANS: Client exception thrown when a temporary folder is not present to store a file upload.
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throw new ClientException(_('Missing a temporary folder.'));
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case UPLOAD_ERR_CANT_WRITE:
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// TRANS: Client exception thrown when writing to disk is not possible during a file upload operation.
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throw new ClientException(_('Failed to write file to disk.'));
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case UPLOAD_ERR_EXTENSION:
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// TRANS: Client exception thrown when a file upload operation has been stopped by an extension.
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throw new ClientException(_('File upload stopped by extension.'));
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default:
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common_log(LOG_ERR, __METHOD__ . ": Unknown upload error " .
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$_FILES[$param]['error']);
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// TRANS: Client exception thrown when a file upload operation has failed with an unknown reason.
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throw new ClientException(_('System error uploading file.'));
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}
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// TODO: Make documentation clearer that this won't work for files >2GiB because
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// PHP is stupid in its 32bit head. But noone accepts 2GiB files with PHP
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// anyway... I hope.
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$filehash = hash_file(File::FILEHASH_ALG, $_FILES[$param]['tmp_name']);
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try {
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$file = File::getByHash($filehash);
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// If no exception is thrown the file exists locally, so we'll use that and just add redirections.
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$filename = $file->filename;
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$mimetype = $file->mimetype;
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} catch (NoResultException $e) {
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// We have to save the upload as a new local file. This is the normal course of action.
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if ($scoped instanceof Profile) {
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// Throws exception if additional size does not respect quota
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// This test is only needed, of course, if we're uploading something new.
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File::respectsQuota($scoped, $_FILES[$param]['size']);
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}
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$mimetype = self::getUploadedMimeType($_FILES[$param]['tmp_name'], $_FILES[$param]['name']);
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$basename = basename($_FILES[$param]['name']);
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$filename = strtolower($filehash) . '.' . File::guessMimeExtension($mimetype, $basename);
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$filepath = File::path($filename);
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$result = move_uploaded_file($_FILES[$param]['tmp_name'], $filepath);
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if (!$result) {
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// TRANS: Client exception thrown when a file upload operation fails because the file could
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// TRANS: not be moved from the temporary folder to the permanent file location.
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throw new ClientException(_('File could not be moved to destination directory.'));
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}
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}
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return new MediaFile($filename, $mimetype, $filehash);
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}
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static function fromFilehandle($fh, Profile $scoped=null) {
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$stream = stream_get_meta_data($fh);
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// So far we're only handling filehandles originating from tmpfile(),
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// so we can always do hash_file on $stream['uri'] as far as I can tell!
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$filehash = hash_file(File::FILEHASH_ALG, $stream['uri']);
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try {
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$file = File::getByHash($filehash);
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// Already have it, so let's reuse the locally stored File
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// by using getPath we also check whether the file exists
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// and throw a FileNotFoundException with the path if it doesn't.
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$filename = basename($file->getPath());
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$mimetype = $file->mimetype;
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} catch (FileNotFoundException $e) {
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// This happens if the file we have uploaded has disappeared
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// from the local filesystem for some reason. Since we got the
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// File object from a sha256 check in fromFilehandle, it's safe
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// to just copy the uploaded data to disk!
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fseek($fh, 0); // just to be sure, go to the beginning
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// dump the contents of our filehandle to the path from our exception
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// and report error if it failed.
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if (false === file_put_contents($e->path, fread($fh, filesize($stream['uri'])))) {
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// TRANS: Client exception thrown when a file upload operation fails because the file could
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// TRANS: not be moved from the temporary folder to the permanent file location.
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throw new ClientException(_('File could not be moved to destination directory.'));
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}
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if (!chmod($e->path, 0664)) {
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common_log(LOG_ERR, 'Could not chmod uploaded file: '._ve($e->path));
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}
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$filename = basename($file->getPath());
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$mimetype = $file->mimetype;
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} catch (NoResultException $e) {
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if ($scoped instanceof Profile) {
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File::respectsQuota($scoped, filesize($stream['uri']));
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}
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$mimetype = self::getUploadedMimeType($stream['uri']);
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$filename = strtolower($filehash) . '.' . File::guessMimeExtension($mimetype);
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$filepath = File::path($filename);
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$result = copy($stream['uri'], $filepath) && chmod($filepath, 0664);
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if (!$result) {
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common_log(LOG_ERR, 'File could not be moved (or chmodded) from '._ve($stream['uri']) . ' to ' . _ve($filepath));
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// TRANS: Client exception thrown when a file upload operation fails because the file could
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// TRANS: not be moved from the temporary folder to the permanent file location.
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throw new ClientException(_('File could not be moved to destination directory.' ));
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}
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}
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return new MediaFile($filename, $mimetype, $filehash);
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}
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/**
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* Attempt to identify the content type of a given file.
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*
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* @param string $filepath filesystem path as string (file must exist)
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* @param string $originalFilename (optional) for extension-based detection
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* @return string
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*
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* @fixme this seems to tie a front-end error message in, kinda confusing
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*
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* @throws ClientException if type is known, but not supported for local uploads
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*/
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static function getUploadedMimeType($filepath, $originalFilename=false) {
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// We only accept filenames to existing files
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$mimelookup = new finfo(FILEINFO_MIME_TYPE);
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$mimetype = $mimelookup->file($filepath);
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// Unclear types are such that we can't really tell by the auto
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// detect what they are (.bin, .exe etc. are just "octet-stream")
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$unclearTypes = array('application/octet-stream',
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'application/vnd.ms-office',
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'application/zip',
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'text/html', // Ironically, Wikimedia Commons' SVG_logo.svg is identified as text/html
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// TODO: for XML we could do better content-based sniffing too
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'text/xml');
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$supported = common_config('attachments', 'supported');
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// If we didn't match, or it is an unclear match
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if ($originalFilename && (!$mimetype || in_array($mimetype, $unclearTypes))) {
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try {
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$type = common_supported_ext_to_mime($originalFilename);
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return $type;
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} catch (Exception $e) {
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// Extension not found, so $mimetype is our best guess
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}
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}
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// If $config['attachments']['supported'] equals boolean true, accept any mimetype
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if ($supported === true || array_key_exists($mimetype, $supported)) {
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// FIXME: Don't know if it always has a mimetype here because
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// finfo->file CAN return false on error: http://php.net/finfo_file
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// so if $supported === true, this may return something unexpected.
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return $mimetype;
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}
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// We can conclude that we have failed to get the MIME type
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$media = common_get_mime_media($mimetype);
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if ('application' !== $media) {
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// TRANS: Client exception thrown trying to upload a forbidden MIME type.
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// TRANS: %1$s is the file type that was denied, %2$s is the application part of
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// TRANS: the MIME type that was denied.
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$hint = sprintf(_('"%1$s" is not a supported file type on this server. ' .
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'Try using another %2$s format.'), $mimetype, $media);
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} else {
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// TRANS: Client exception thrown trying to upload a forbidden MIME type.
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// TRANS: %s is the file type that was denied.
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$hint = sprintf(_('"%s" is not a supported file type on this server.'), $mimetype);
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}
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throw new ClientException($hint);
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}
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}
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