635 lines
26 KiB
PHP
635 lines
26 KiB
PHP
<?php
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/*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2008, 2009, StatusNet, Inc.
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*
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* 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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if (!defined('GNUSOCIAL')) { exit(1); }
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/**
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* Table Definition for file
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*/
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class File extends Managed_DataObject
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{
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public $__table = 'file'; // table name
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public $id; // int(4) primary_key not_null
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public $urlhash; // varchar(64) unique_key
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public $url; // text
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public $filehash; // varchar(64) indexed
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public $mimetype; // varchar(50)
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public $size; // int(4)
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public $title; // varchar(191) not 255 because utf8mb4 takes more space
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public $date; // int(4)
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public $protected; // int(4)
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public $filename; // varchar(191) not 255 because utf8mb4 takes more space
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public $width; // int(4)
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public $height; // int(4)
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public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
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const URLHASH_ALG = 'sha256';
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const FILEHASH_ALG = 'sha256';
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public static function schemaDef()
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{
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return array(
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'fields' => array(
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'id' => array('type' => 'serial', 'not null' => true),
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'urlhash' => array('type' => 'varchar', 'length' => 64, 'not null' => true, 'description' => 'sha256 of destination URL (url field)'),
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'url' => array('type' => 'text', 'description' => 'destination URL after following possible redirections'),
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'filehash' => array('type' => 'varchar', 'length' => 64, 'not null' => false, 'description' => 'sha256 of the file contents, only for locally stored files of course'),
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'mimetype' => array('type' => 'varchar', 'length' => 50, 'description' => 'mime type of resource'),
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'size' => array('type' => 'int', 'description' => 'size of resource when available'),
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'title' => array('type' => 'varchar', 'length' => 191, 'description' => 'title of resource when available'),
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'date' => array('type' => 'int', 'description' => 'date of resource according to http query'),
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'protected' => array('type' => 'int', 'description' => 'true when URL is private (needs login)'),
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'filename' => array('type' => 'varchar', 'length' => 191, 'description' => 'if a local file, name of the file'),
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'width' => array('type' => 'int', 'description' => 'width in pixels, if it can be described as such and data is available'),
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'height' => array('type' => 'int', 'description' => 'height in pixels, if it can be described as such and data is available'),
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'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
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),
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'primary key' => array('id'),
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'unique keys' => array(
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'file_urlhash_key' => array('urlhash'),
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),
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'indexes' => array(
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'file_filehash_idx' => array('filehash'),
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),
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);
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}
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function isProtected($url) {
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return 'http://www.facebook.com/login.php' === $url;
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}
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/**
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* Save a new file record.
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*
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* @param array $redir_data lookup data eg from File_redirection::where()
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* @param string $given_url
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* @return File
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*/
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public static function saveNew(array $redir_data, $given_url) {
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// I don't know why we have to keep doing this but I'm adding this last check to avoid
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// uniqueness bugs.
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$file = File::getKV('urlhash', self::hashurl($given_url));
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if (!$file instanceof File) {
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$file = new File;
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$file->urlhash = self::hashurl($given_url);
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$file->url = $given_url;
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if (!empty($redir_data['protected'])) $file->protected = $redir_data['protected'];
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if (!empty($redir_data['title'])) $file->title = $redir_data['title'];
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if (!empty($redir_data['type'])) $file->mimetype = $redir_data['type'];
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if (!empty($redir_data['size'])) $file->size = intval($redir_data['size']);
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if (isset($redir_data['time']) && $redir_data['time'] > 0) $file->date = intval($redir_data['time']);
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$file_id = $file->insert();
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}
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Event::handle('EndFileSaveNew', array($file, $redir_data, $given_url));
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assert ($file instanceof File);
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return $file;
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}
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/**
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* Go look at a URL and possibly save data about it if it's new:
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* - follow redirect chains and store them in file_redirection
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* - if a thumbnail is available, save it in file_thumbnail
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* - save file record with basic info
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* - optionally save a file_to_post record
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* - return the File object with the full reference
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*
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* @fixme refactor this mess, it's gotten pretty scary.
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* @param string $given_url the URL we're looking at
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* @param int $notice_id (optional)
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* @param bool $followRedirects defaults to true
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*
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* @return mixed File on success, -1 on some errors
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*
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* @throws ServerException on failure
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*/
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public static function processNew($given_url, $notice_id=null, $followRedirects=true) {
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if (empty($given_url)) {
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throw new ServerException('No given URL to process');
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}
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$given_url = File_redirection::_canonUrl($given_url);
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if (empty($given_url)) {
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throw new ServerException('No canonical URL from given URL to process');
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}
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$file = null;
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try {
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$file = File::getByUrl($given_url);
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} catch (NoResultException $e) {
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// First check if we have a lookup trace for this URL already
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try {
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$file_redir = File_redirection::getByUrl($given_url);
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$file = File::getKV('id', $file_redir->file_id);
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if (!$file instanceof File) {
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// File did not exist, let's clean up the File_redirection entry
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$file_redir->delete();
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}
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} catch (NoResultException $e) {
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// We just wanted to doublecheck whether a File_thumbnail we might've had
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// actually referenced an existing File object.
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}
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}
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// If we still don't have a File object, let's create one now!
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if (!$file instanceof File) {
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// @fixme for new URLs this also looks up non-redirect data
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// such as target content type, size, etc, which we need
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// for File::saveNew(); so we call it even if not following
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// new redirects.
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$redir_data = File_redirection::where($given_url);
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if (is_array($redir_data)) {
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$redir_url = $redir_data['url'];
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} elseif (is_string($redir_data)) {
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$redir_url = $redir_data;
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$redir_data = array();
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} else {
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// TRANS: Server exception thrown when a URL cannot be processed.
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throw new ServerException(sprintf(_("Cannot process URL '%s'"), $given_url));
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}
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if ($redir_url === $given_url || !$followRedirects) {
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// Save the File object based on our lookup trace
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$file = File::saveNew($redir_data, $given_url);
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} else {
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// This seems kind of messed up... for now skipping this part
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// if we're already under a redirect, so we don't go into
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// horrible infinite loops if we've been given an unstable
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// redirect (where the final destination of the first request
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// doesn't match what we get when we ask for it again).
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//
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// Seen in the wild with clojure.org, which redirects through
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// wikispaces for auth and appends session data in the URL params.
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$file = self::processNew($redir_url, $notice_id, /*followRedirects*/false);
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File_redirection::saveNew($redir_data, $file->id, $given_url);
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}
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if (!$file instanceof File) {
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// This should only happen if File::saveNew somehow did not return a File object,
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// though we have an assert for that in case the event there might've gone wrong.
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// If anything else goes wrong, there should've been an exception thrown.
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throw new ServerException('URL processing failed without new File object');
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}
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}
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if (!empty($notice_id)) {
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File_to_post::processNew($file->id, $notice_id);
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}
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return $file;
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}
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public static function respectsQuota(Profile $scoped, $fileSize) {
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if ($fileSize > common_config('attachments', 'file_quota')) {
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// TRANS: Message used to be inserted as %2$s in the text "No file may
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// TRANS: be larger than %1$d byte and the file you sent was %2$s.".
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// TRANS: %1$d is the number of bytes of an uploaded file.
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$fileSizeText = sprintf(_m('%1$d byte','%1$d bytes',$fileSize),$fileSize);
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$fileQuota = common_config('attachments', 'file_quota');
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// TRANS: Message given if an upload is larger than the configured maximum.
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// TRANS: %1$d (used for plural) is the byte limit for uploads,
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// TRANS: %2$s is the proper form of "n bytes". This is the only ways to have
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// TRANS: gettext support multiple plurals in the same message, unfortunately...
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throw new ClientException(
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sprintf(_m('No file may be larger than %1$d byte and the file you sent was %2$s. Try to upload a smaller version.',
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'No file may be larger than %1$d bytes and the file you sent was %2$s. Try to upload a smaller version.',
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$fileQuota),
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$fileQuota, $fileSizeText));
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}
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$file = new File;
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$query = "select sum(size) as total from file join file_to_post on file_to_post.file_id = file.id join notice on file_to_post.post_id = notice.id where profile_id = {$scoped->id} and file.url like '%/notice/%/file'";
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$file->query($query);
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$file->fetch();
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$total = $file->total + $fileSize;
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if ($total > common_config('attachments', 'user_quota')) {
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// TRANS: Message given if an upload would exceed user quota.
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// TRANS: %d (number) is the user quota in bytes and is used for plural.
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throw new ClientException(
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sprintf(_m('A file this large would exceed your user quota of %d byte.',
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'A file this large would exceed your user quota of %d bytes.',
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common_config('attachments', 'user_quota')),
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common_config('attachments', 'user_quota')));
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}
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$query .= ' AND EXTRACT(month FROM file.modified) = EXTRACT(month FROM now()) and EXTRACT(year FROM file.modified) = EXTRACT(year FROM now())';
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$file->query($query);
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$file->fetch();
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$total = $file->total + $fileSize;
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if ($total > common_config('attachments', 'monthly_quota')) {
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// TRANS: Message given id an upload would exceed a user's monthly quota.
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// TRANS: $d (number) is the monthly user quota in bytes and is used for plural.
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throw new ClientException(
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sprintf(_m('A file this large would exceed your monthly quota of %d byte.',
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'A file this large would exceed your monthly quota of %d bytes.',
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common_config('attachments', 'monthly_quota')),
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common_config('attachments', 'monthly_quota')));
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}
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return true;
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}
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// where should the file go?
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static function filename(Profile $profile, $origname, $mimetype)
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{
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$ext = self::guessMimeExtension($mimetype);
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// Normalize and make the original filename more URL friendly.
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$origname = basename($origname, ".$ext");
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if (class_exists('Normalizer')) {
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// http://php.net/manual/en/class.normalizer.php
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// http://www.unicode.org/reports/tr15/
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$origname = Normalizer::normalize($origname, Normalizer::FORM_KC);
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}
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$origname = preg_replace('/[^A-Za-z0-9\.\_]/', '_', $origname);
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$nickname = $profile->getNickname();
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$datestamp = strftime('%Y%m%d', time());
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do {
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// generate new random strings until we don't run into a filename collision.
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$random = strtolower(common_confirmation_code(16));
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$filename = "$nickname-$datestamp-$origname-$random.$ext";
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} while (file_exists(self::path($filename)));
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return $filename;
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}
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static function guessMimeExtension($mimetype)
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{
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try {
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$ext = common_supported_mime_to_ext($mimetype);
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} catch (Exception $e) {
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// We don't support this mimetype, but let's guess the extension
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$ext = substr(strrchr($mimetype, '/'), 1);
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}
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return strtolower($ext);
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}
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/**
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* Validation for as-saved base filenames
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*/
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static function validFilename($filename)
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{
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return preg_match('/^[A-Za-z0-9._-]+$/', $filename);
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}
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/**
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* @throws ClientException on invalid filename
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*/
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static function path($filename)
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{
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if (!self::validFilename($filename)) {
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// TRANS: Client exception thrown if a file upload does not have a valid name.
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throw new ClientException(_("Invalid filename."));
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}
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$dir = common_config('attachments', 'dir');
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if ($dir[strlen($dir)-1] != '/') {
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$dir .= '/';
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}
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return $dir . $filename;
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}
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static function url($filename)
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{
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if (!self::validFilename($filename)) {
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// TRANS: Client exception thrown if a file upload does not have a valid name.
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throw new ClientException(_("Invalid filename."));
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}
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if (common_config('site','private')) {
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return common_local_url('getfile',
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array('filename' => $filename));
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}
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if (GNUsocial::useHTTPS()) {
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$sslserver = common_config('attachments', 'sslserver');
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if (empty($sslserver)) {
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// XXX: this assumes that background dir == site dir + /file/
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// not true if there's another server
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if (is_string(common_config('site', 'sslserver')) &&
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mb_strlen(common_config('site', 'sslserver')) > 0) {
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$server = common_config('site', 'sslserver');
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} else if (common_config('site', 'server')) {
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$server = common_config('site', 'server');
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}
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$path = common_config('site', 'path') . '/file/';
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} else {
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$server = $sslserver;
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$path = common_config('attachments', 'sslpath');
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if (empty($path)) {
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$path = common_config('attachments', 'path');
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}
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}
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$protocol = 'https';
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} else {
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$path = common_config('attachments', 'path');
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$server = common_config('attachments', 'server');
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if (empty($server)) {
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$server = common_config('site', 'server');
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}
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$ssl = common_config('attachments', 'ssl');
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$protocol = ($ssl) ? 'https' : 'http';
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}
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if ($path[strlen($path)-1] != '/') {
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$path .= '/';
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}
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if ($path[0] != '/') {
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$path = '/'.$path;
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}
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return $protocol.'://'.$server.$path.$filename;
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}
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function getEnclosure(){
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$enclosure = (object) array();
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foreach (array('title', 'url', 'date', 'modified', 'size', 'mimetype') as $key) {
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$enclosure->$key = $this->$key;
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}
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$needMoreMetadataMimetypes = array(null, 'application/xhtml+xml');
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if (!isset($this->filename) && in_array(common_bare_mime($enclosure->mimetype), $needMoreMetadataMimetypes)) {
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// This fetches enclosure metadata for non-local links with unset/HTML mimetypes,
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// which may be enriched through oEmbed or similar (implemented as plugins)
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Event::handle('FileEnclosureMetadata', array($this, &$enclosure));
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}
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if (empty($enclosure->mimetype) || in_array(common_bare_mime($enclosure->mimetype), $needMoreMetadataMimetypes)) {
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// This means we either don't know what it is, so it can't
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// be shown as an enclosure, or it is an HTML link which
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// does not link to a resource with further metadata.
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throw new ServerException('Unknown enclosure mimetype, not enough metadata');
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}
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return $enclosure;
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}
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/**
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* Get the attachment's thumbnail record, if any.
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* Make sure you supply proper 'int' typed variables (or null).
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*
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* @param $width int Max width of thumbnail in pixels. (if null, use common_config values)
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* @param $height int Max height of thumbnail in pixels. (if null, square-crop to $width)
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* @param $crop bool Crop to the max-values' aspect ratio
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*
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* @return File_thumbnail
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*
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* @throws UseFileAsThumbnailException if the file is considered an image itself and should be itself as thumbnail
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* @throws UnsupportedMediaException if, despite trying, we can't understand how to make a thumbnail for this format
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* @throws ServerException on various other errors
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*/
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public function getThumbnail($width=null, $height=null, $crop=false, $force_still=true)
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{
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// Get some more information about this file through our ImageFile class
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$image = ImageFile::fromFileObject($this);
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if ($image->animated && !common_config('thumbnail', 'animated')) {
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// null means "always use file as thumbnail"
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// false means you get choice between frozen frame or original when calling getThumbnail
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if (is_null(common_config('thumbnail', 'animated')) || !$force_still) {
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throw new UseFileAsThumbnailException($this->id);
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}
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}
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return $image->getFileThumbnail($width, $height, $crop);
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}
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public function getPath()
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{
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$filepath = self::path($this->filename);
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if (!file_exists($filepath)) {
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throw new FileNotFoundException($filepath);
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}
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return $filepath;
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}
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public function getUrl()
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{
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if (!empty($this->filename)) {
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// A locally stored file, so let's generate a URL for our instance.
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$url = self::url($this->filename);
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if (self::hashurl($url) !== $this->urlhash) {
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// For indexing purposes, in case we do a lookup on the 'url' field.
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// also we're fixing possible changes from http to https, or paths
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$this->updateUrl($url);
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}
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return $url;
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}
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// No local filename available, return the URL we have stored
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return $this->url;
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}
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static public function getByUrl($url)
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{
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$file = new File();
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$file->urlhash = self::hashurl($url);
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if (!$file->find(true)) {
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throw new NoResultException($file);
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}
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return $file;
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}
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/**
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* @param string $hashstr String of (preferrably lower case) hexadecimal characters, same as result of 'hash_file(...)'
|
|
*/
|
|
static public function getByHash($hashstr, $alg=File::FILEHASH_ALG)
|
|
{
|
|
$file = new File();
|
|
$file->filehash = strtolower($hashstr);
|
|
if (!$file->find(true)) {
|
|
throw new NoResultException($file);
|
|
}
|
|
return $file;
|
|
}
|
|
|
|
public function updateUrl($url)
|
|
{
|
|
$file = File::getKV('urlhash', self::hashurl($url));
|
|
if ($file instanceof File) {
|
|
throw new ServerException('URL already exists in DB');
|
|
}
|
|
$sql = 'UPDATE %1$s SET urlhash=%2$s, url=%3$s WHERE urlhash=%4$s;';
|
|
$result = $this->query(sprintf($sql, $this->__table,
|
|
$this->_quote((string)self::hashurl($url)),
|
|
$this->_quote((string)$url),
|
|
$this->_quote((string)$this->urlhash)));
|
|
if ($result === false) {
|
|
common_log_db_error($this, 'UPDATE', __FILE__);
|
|
throw new ServerException("Could not UPDATE {$this->__table}.url");
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Blow the cache of notices that link to this URL
|
|
*
|
|
* @param boolean $last Whether to blow the "last" cache too
|
|
*
|
|
* @return void
|
|
*/
|
|
|
|
function blowCache($last=false)
|
|
{
|
|
self::blow('file:notice-ids:%s', $this->urlhash);
|
|
if ($last) {
|
|
self::blow('file:notice-ids:%s;last', $this->urlhash);
|
|
}
|
|
self::blow('file:notice-count:%d', $this->id);
|
|
}
|
|
|
|
/**
|
|
* Stream of notices linking to this URL
|
|
*
|
|
* @param integer $offset Offset to show; default is 0
|
|
* @param integer $limit Limit of notices to show
|
|
* @param integer $since_id Since this notice
|
|
* @param integer $max_id Before this notice
|
|
*
|
|
* @return array ids of notices that link to this file
|
|
*/
|
|
|
|
function stream($offset=0, $limit=NOTICES_PER_PAGE, $since_id=0, $max_id=0)
|
|
{
|
|
$stream = new FileNoticeStream($this);
|
|
return $stream->getNotices($offset, $limit, $since_id, $max_id);
|
|
}
|
|
|
|
function noticeCount()
|
|
{
|
|
$cacheKey = sprintf('file:notice-count:%d', $this->id);
|
|
|
|
$count = self::cacheGet($cacheKey);
|
|
|
|
if ($count === false) {
|
|
|
|
$f2p = new File_to_post();
|
|
|
|
$f2p->file_id = $this->id;
|
|
|
|
$count = $f2p->count();
|
|
|
|
self::cacheSet($cacheKey, $count);
|
|
}
|
|
|
|
return $count;
|
|
}
|
|
|
|
public function isLocal()
|
|
{
|
|
return !empty($this->filename);
|
|
}
|
|
|
|
public function delete($useWhere=false)
|
|
{
|
|
// Delete the file, if it exists locally
|
|
if (!empty($this->filename) && file_exists(self::path($this->filename))) {
|
|
$deleted = @unlink(self::path($this->filename));
|
|
if (!$deleted) {
|
|
common_log(LOG_ERR, sprintf('Could not unlink existing file: "%s"', self::path($this->filename)));
|
|
}
|
|
}
|
|
|
|
// Clear out related things in the database and filesystem, such as thumbnails
|
|
if (Event::handle('FileDeleteRelated', array($this))) {
|
|
$thumbs = new File_thumbnail();
|
|
$thumbs->file_id = $this->id;
|
|
if ($thumbs->find()) {
|
|
while ($thumbs->fetch()) {
|
|
$thumbs->delete();
|
|
}
|
|
}
|
|
}
|
|
|
|
// And finally remove the entry from the database
|
|
return parent::delete($useWhere);
|
|
}
|
|
|
|
public function getTitle()
|
|
{
|
|
$title = $this->title ?: $this->filename;
|
|
|
|
return $title ?: null;
|
|
}
|
|
|
|
static public function hashurl($url)
|
|
{
|
|
if (empty($url)) {
|
|
throw new Exception('No URL provided to hash algorithm.');
|
|
}
|
|
return hash(self::URLHASH_ALG, $url);
|
|
}
|
|
|
|
static public function beforeSchemaUpdate()
|
|
{
|
|
$table = strtolower(get_called_class());
|
|
$schema = Schema::get();
|
|
$schemadef = $schema->getTableDef($table);
|
|
|
|
// 2015-02-19 We have to upgrade our table definitions to have the urlhash field populated
|
|
if (isset($schemadef['fields']['urlhash']) && isset($schemadef['unique keys']['file_urlhash_key'])) {
|
|
// We already have the urlhash field, so no need to migrate it.
|
|
return;
|
|
}
|
|
echo "\nFound old $table table, upgrading it to contain 'urlhash' field...";
|
|
// We have to create a urlhash that is _not_ the primary key,
|
|
// transfer data and THEN run checkSchema
|
|
$schemadef['fields']['urlhash'] = array (
|
|
'type' => 'varchar',
|
|
'length' => 64,
|
|
'not null' => true,
|
|
'description' => 'sha256 of destination URL (url field)',
|
|
);
|
|
$schemadef['fields']['url'] = array (
|
|
'type' => 'text',
|
|
'description' => 'destination URL after following possible redirections',
|
|
);
|
|
unset($schemadef['unique keys']);
|
|
$schema->ensureTable($table, $schemadef);
|
|
echo "DONE.\n";
|
|
|
|
$classname = ucfirst($table);
|
|
$tablefix = new $classname;
|
|
// urlhash is hash('sha256', $url) in the File table
|
|
echo "Updating urlhash fields in $table table...";
|
|
// Maybe very MySQL specific :(
|
|
$tablefix->query(sprintf('UPDATE %1$s SET %2$s=%3$s;',
|
|
$schema->quoteIdentifier($table),
|
|
'urlhash',
|
|
// The line below is "result of sha256 on column `url`"
|
|
'SHA2(url, 256)'));
|
|
echo "DONE.\n";
|
|
echo "Resuming core schema upgrade...";
|
|
}
|
|
}
|