forked from GNUsocial/gnu-social
420 lines
15 KiB
PHP
420 lines
15 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('STATUSNET') && !defined('LACONICA')) {
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exit(1);
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}
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class MediaFile
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{
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var $filename = null;
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var $fileRecord = null;
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var $user = null;
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var $fileurl = null;
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var $short_fileurl = null;
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var $mimetype = null;
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function __construct($user = null, $filename = null, $mimetype = null)
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{
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if ($user == null) {
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$this->user = common_current_user();
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} else {
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$this->user = $user;
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}
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$this->filename = $filename;
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$this->mimetype = $mimetype;
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$this->fileRecord = $this->storeFile();
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$this->thumbnailRecord = $this->storeThumbnail();
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$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, $this->short_fileurl);
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}
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function attachToNotice($notice)
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{
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File_to_post::processNew($this->fileRecord->id, $notice->id);
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$this->maybeAddRedir($this->fileRecord->id,
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common_local_url('file', array('notice' => $notice->id)));
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}
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function shortUrl()
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{
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return $this->short_fileurl;
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}
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function delete()
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{
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$filepath = File::path($this->filename);
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@unlink($filepath);
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}
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function storeFile() {
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$file = new File;
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$file->filename = $this->filename;
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$file->url = File::url($this->filename);
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$filepath = File::path($this->filename);
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$file->size = filesize($filepath);
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$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) {
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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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return $file;
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}
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/**
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* Generate and store a thumbnail image for the uploaded file, if applicable.
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*
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* @return File_thumbnail or null
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*/
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function storeThumbnail()
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{
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if (substr($this->mimetype, 0, strlen('image/')) != 'image/') {
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// @fixme video thumbs would be nice!
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return null;
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}
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try {
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$image = new ImageFile($this->fileRecord->id,
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File::path($this->filename));
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} catch (Exception $e) {
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// Unsupported image type.
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return null;
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}
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$outname = File::filename($this->user->getProfile(), 'thumb-' . $this->filename, $this->mimetype);
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$outpath = File::path($outname);
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$maxWidth = common_config('attachments', 'thumb_width');
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$maxHeight = common_config('attachments', 'thumb_height');
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list($width, $height) = $this->scaleToFit($image->width, $image->height, $maxWidth, $maxHeight);
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$image->resizeTo($outpath, $width, $height);
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File_thumbnail::saveThumbnail($this->fileRecord->id,
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File::url($outname),
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$width,
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$height);
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}
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function scaleToFit($width, $height, $maxWidth, $maxHeight)
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{
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$aspect = $maxWidth / $maxHeight;
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$w1 = $maxWidth;
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$h1 = intval($height * $maxWidth / $width);
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if ($h1 > $maxHeight) {
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$w2 = intval($width * $maxHeight / $height);
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$h2 = $maxHeight;
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return array($w2, $h2);
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}
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return array($w1, $h1);
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}
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function rememberFile($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, $url)
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{
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$file_redir = File_redirection::staticGet('url', $url);
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if (empty($file_redir)) {
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$file_redir = new File_redirection;
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$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) {
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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', $user = null)
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{
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if (empty($user)) {
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$user = common_current_user();
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}
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if (!isset($_FILES[$param]['error'])){
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return;
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}
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switch ($_FILES[$param]['error']) {
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case UPLOAD_ERR_OK: // success, jump out
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break;
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case UPLOAD_ERR_INI_SIZE:
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// TRANS: Client exception thrown when an uploaded file is larger than set in php.ini.
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throw new ClientException(_('The uploaded file exceeds the ' .
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'upload_max_filesize directive in php.ini.'));
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return;
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case UPLOAD_ERR_FORM_SIZE:
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throw new ClientException(
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// TRANS: Client exception.
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_('The uploaded file exceeds the MAX_FILE_SIZE directive' .
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' that was specified in the HTML form.'));
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return;
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case UPLOAD_ERR_PARTIAL:
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@unlink($_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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return;
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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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return;
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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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return;
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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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return;
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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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return;
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default:
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common_log(LOG_ERR, __METHOD__ . ": Unknown upload error " .
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$_FILES[$param]['error']);
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// TRANS: Client exception thrown when a file upload operation has failed with an unknown reason.
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throw new ClientException(_('System error uploading file.'));
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return;
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}
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if (!MediaFile::respectsQuota($user, $_FILES[$param]['size'])) {
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// Should never actually get here
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@unlink($_FILES[$param]['tmp_name']);
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// TRANS: Client exception thrown when a file upload operation would cause a user to exceed a set quota.
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throw new ClientException(_('File exceeds user\'s quota.'));
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return;
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}
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$mimetype = MediaFile::getUploadedFileType($_FILES[$param]['tmp_name'],
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$_FILES[$param]['name']);
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$filename = null;
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if (isset($mimetype)) {
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$basename = basename($_FILES[$param]['name']);
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$filename = File::filename($user->getProfile(), $basename, $mimetype);
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$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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return;
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}
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} else {
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// TRANS: Client exception thrown when a file upload operation has been stopped because the MIME
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// TRANS: type of the uploaded file could not be determined.
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throw new ClientException(_('Could not determine file\'s MIME type.'));
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return;
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}
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return new MediaFile($user, $filename, $mimetype);
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}
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static function fromFilehandle($fh, $user) {
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$stream = stream_get_meta_data($fh);
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if (!MediaFile::respectsQuota($user, filesize($stream['uri']))) {
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// Should never actually get here
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// TRANS: Client exception thrown when a file upload operation would cause a user to exceed a set quota.
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throw new ClientException(_('File exceeds user\'s quota.'));
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return;
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}
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$mimetype = MediaFile::getUploadedFileType($fh);
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$filename = null;
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if (isset($mimetype)) {
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$filename = File::filename($user->getProfile(), "email", $mimetype);
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$filepath = File::path($filename);
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$result = copy($stream['uri'], $filepath) && chmod($filepath, 0664);
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if (!$result) {
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// TRANS: Client exception thrown when a file upload operation fails because the file could
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// TRANS: not be moved from the temporary folder to the permanent file location.
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throw new ClientException(_('File could not be moved to destination directory.' .
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$stream['uri'] . ' ' . $filepath));
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}
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} else {
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// TRANS: Client exception thrown when a file upload operation has been stopped because the MIME
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// TRANS: type of the uploaded file could not be determined.
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throw new ClientException(_('Could not determine file\'s MIME type.'));
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return;
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}
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return new MediaFile($user, $filename, $mimetype);
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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 mixed $f file handle resource, or filesystem path as string
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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 is this an internal or public method? It's called from GetFileAction
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* @fixme this seems to tie a front-end error message in, kinda confusing
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* @fixme this looks like it could return a PEAR_Error in some cases, if
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* type can't be identified and $config['attachments']['supported'] is true
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*
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* @throws ClientException if type is known, but not supported for local uploads
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*/
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static function getUploadedFileType($f, $originalFilename=false) {
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require_once 'MIME/Type.php';
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require_once 'MIME/Type/Extension.php';
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// We have to disable auto handling of PEAR errors
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PEAR::staticPushErrorHandling(PEAR_ERROR_RETURN);
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$mte = new MIME_Type_Extension();
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$cmd = &PEAR::getStaticProperty('MIME_Type', 'fileCmd');
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$cmd = common_config('attachments', 'filecommand');
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$filetype = null;
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// If we couldn't get a clear type from the file extension,
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// we'll go ahead and try checking the content. Content checks
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// are unambiguous for most image files, but nearly useless
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// for office document formats.
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if (is_string($f)) {
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// assuming a filename
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$filetype = MIME_Type::autoDetect($f);
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} else {
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// assuming a filehandle
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$stream = stream_get_meta_data($f);
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$filetype = MIME_Type::autoDetect($stream['uri']);
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}
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// The content-based sources for MIME_Type::autoDetect()
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// are wildly unreliable for office-type documents. If we've
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// gotten an unclear reponse back or just couldn't identify it,
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// we'll try detecting a type from its extension...
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$unclearTypes = array('application/octet-stream',
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'application/vnd.ms-office',
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'application/zip',
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// TODO: for XML we could do better content-based sniffing too
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'text/xml');
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if ($originalFilename && (!$filetype || in_array($filetype, $unclearTypes))) {
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$type = $mte->getMIMEType($originalFilename);
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if (is_string($type)) {
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$filetype = $type;
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}
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}
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$supported = common_config('attachments', 'supported');
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if (is_array($supported)) {
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// Normalize extensions to mime types
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foreach ($supported as $i => $entry) {
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if (strpos($entry, '/') === false) {
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common_log(LOG_INFO, "sample.$entry");
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$supported[$i] = $mte->getMIMEType("sample.$entry");
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}
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}
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}
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if ($supported === true || in_array($filetype, $supported)) {
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// Restore PEAR error handlers for our DB code...
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PEAR::staticPopErrorHandling();
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return $filetype;
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}
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$media = MIME_Type::getMedia($filetype);
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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.'), $filetype, $media);
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} else {
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// TRANS: Client exception thrown trying to upload a forbidden MIME type.
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// TRANS: %s is the file type that was denied.
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$hint = sprintf(_('"%s" is not a supported file type on this server.'), $filetype);
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}
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// Restore PEAR error handlers for our DB code...
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PEAR::staticPopErrorHandling();
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throw new ClientException($hint);
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}
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static function respectsQuota($user, $filesize)
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{
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$file = new File;
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$result = $file->isRespectsQuota($user, $filesize);
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if ($result === true) {
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return true;
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} else {
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throw new ClientException($result);
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}
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}
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}
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