275 lines
10 KiB
PHP
275 lines
10 KiB
PHP
<?php
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/*
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* Laconica - a distributed open-source microblogging tool
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* Copyright (C) 2008, 2009, Control Yourself, 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('LACONICA')) { exit(1); }
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require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
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require_once INSTALLDIR.'/classes/File.php';
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require_once INSTALLDIR.'/classes/File_oembed.php';
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define('USER_AGENT', 'Laconica user agent / file probe');
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/**
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* Table Definition for file_redirection
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*/
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class File_redirection extends Memcached_DataObject
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{
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###START_AUTOCODE
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/* the code below is auto generated do not remove the above tag */
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public $__table = 'file_redirection'; // table name
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public $id; // int(11) not_null primary_key group_by
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public $url; // varchar(255) unique_key
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public $file_id; // int(11) group_by
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public $redirections; // int(11) group_by
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public $httpcode; // int(11) group_by
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/* Static get */
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function staticGet($k,$v=NULL) { return DB_DataObject::staticGet('File_redirection',$k,$v); }
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/* the code above is auto generated do not remove the tag below */
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###END_AUTOCODE
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function _commonCurl($url, $redirs) {
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$curlh = curl_init();
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curl_setopt($curlh, CURLOPT_URL, $url);
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curl_setopt($curlh, CURLOPT_AUTOREFERER, true); // # setup referer header when folowing redirects
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curl_setopt($curlh, CURLOPT_CONNECTTIMEOUT, 10); // # seconds to wait
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curl_setopt($curlh, CURLOPT_MAXREDIRS, $redirs); // # max number of http redirections to follow
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curl_setopt($curlh, CURLOPT_USERAGENT, USER_AGENT);
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curl_setopt($curlh, CURLOPT_FOLLOWLOCATION, true); // Follow redirects
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curl_setopt($curlh, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($curlh, CURLOPT_FILETIME, true);
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curl_setopt($curlh, CURLOPT_HEADER, true); // Include header in output
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return $curlh;
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}
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function _redirectWhere_imp($short_url, $redirs = 10, $protected = false) {
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if ($redirs < 0) return false;
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// let's see if we know this...
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$a = File::staticGet('url', $short_url);
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if (empty($a->id)) {
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$b = File_redirection::staticGet('url', $short_url);
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if (empty($b->id)) {
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// we'll have to figure it out
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} else {
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// this is a redirect to $b->file_id
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$a = File::staticGet($b->file_id);
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$url = $a->url;
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}
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} else {
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// this is a direct link to $a->url
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$url = $a->url;
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}
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if (isset($url)) {
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return $url;
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}
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$curlh = File_redirection::_commonCurl($short_url, $redirs);
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// Don't include body in output
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curl_setopt($curlh, CURLOPT_NOBODY, true);
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curl_exec($curlh);
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$info = curl_getinfo($curlh);
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curl_close($curlh);
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if (405 == $info['http_code']) {
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$curlh = File_redirection::_commonCurl($short_url, $redirs);
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curl_exec($curlh);
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$info = curl_getinfo($curlh);
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curl_close($curlh);
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}
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if (!empty($info['redirect_count']) && File::isProtected($info['url'])) {
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return File_redirection::_redirectWhere_imp($short_url, $info['redirect_count'] - 1, true);
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}
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$ret = array('code' => $info['http_code']
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, 'redirects' => $info['redirect_count']
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, 'url' => $info['url']);
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if (!empty($info['content_type'])) $ret['type'] = $info['content_type'];
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if ($protected) $ret['protected'] = true;
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if (!empty($info['download_content_length'])) $ret['size'] = $info['download_content_length'];
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if (isset($info['filetime']) && ($info['filetime'] > 0)) $ret['time'] = $info['filetime'];
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return $ret;
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}
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function where($in_url) {
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$ret = File_redirection::_redirectWhere_imp($in_url);
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return $ret;
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}
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function makeShort($long_url) {
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$long_url = File_redirection::_canonUrl($long_url);
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// do we already know this long_url and have a short redirection for it?
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$file = new File;
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$file_redir = new File_redirection;
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$file->url = $long_url;
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$file->joinAdd($file_redir);
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$file->selectAdd('length(file_redirection.url) as len');
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$file->limit(1);
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$file->orderBy('len');
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$file->find(true);
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if (!empty($file->url) && (strlen($file->url) < strlen($long_url))) {
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return $file->url;
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}
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// if yet unknown, we must find a short url according to user settings
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$short_url = File_redirection::_userMakeShort($long_url, common_current_user());
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return $short_url;
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}
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function _userMakeShort($long_url, $user) {
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if (empty($user)) {
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// common current user does not find a user when called from the XMPP daemon
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// therefore we'll set one here fix, so that XMPP given URLs may be shortened
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$user->urlshorteningservice = 'ur1.ca';
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}
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$curlh = curl_init();
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curl_setopt($curlh, CURLOPT_CONNECTTIMEOUT, 20); // # seconds to wait
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curl_setopt($curlh, CURLOPT_USERAGENT, 'Laconica');
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curl_setopt($curlh, CURLOPT_RETURNTRANSFER, true);
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switch($user->urlshorteningservice) {
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case 'ur1.ca':
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require_once INSTALLDIR.'/lib/Shorturl_api.php';
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$short_url_service = new LilUrl;
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$short_url = $short_url_service->shorten($long_url);
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break;
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case '2tu.us':
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$short_url_service = new TightUrl;
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require_once INSTALLDIR.'/lib/Shorturl_api.php';
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$short_url = $short_url_service->shorten($long_url);
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break;
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case 'ptiturl.com':
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require_once INSTALLDIR.'/lib/Shorturl_api.php';
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$short_url_service = new PtitUrl;
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$short_url = $short_url_service->shorten($long_url);
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break;
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case 'bit.ly':
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curl_setopt($curlh, CURLOPT_URL, 'http://bit.ly/api?method=shorten&long_url='.urlencode($long_url));
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$short_url = current(json_decode(curl_exec($curlh))->results)->hashUrl;
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break;
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case 'is.gd':
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curl_setopt($curlh, CURLOPT_URL, 'http://is.gd/api.php?longurl='.urlencode($long_url));
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$short_url = curl_exec($curlh);
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break;
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case 'snipr.com':
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curl_setopt($curlh, CURLOPT_URL, 'http://snipr.com/site/snip?r=simple&link='.urlencode($long_url));
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$short_url = curl_exec($curlh);
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break;
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case 'metamark.net':
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curl_setopt($curlh, CURLOPT_URL, 'http://metamark.net/api/rest/simple?long_url='.urlencode($long_url));
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$short_url = curl_exec($curlh);
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break;
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case 'tinyurl.com':
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curl_setopt($curlh, CURLOPT_URL, 'http://tinyurl.com/api-create.php?url='.urlencode($long_url));
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$short_url = curl_exec($curlh);
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break;
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default:
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$short_url = false;
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}
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curl_close($curlh);
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if ($short_url) {
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$short_url = (string)$short_url;
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// store it
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$file = File::staticGet('url', $long_url);
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if (empty($file)) {
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$redir_data = File_redirection::where($long_url);
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$file = File::saveNew($redir_data, $long_url);
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$file_id = $file->id;
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if (!empty($redir_data['oembed']['json'])) {
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File_oembed::saveNew($redir_data['oembed']['json'], $file_id);
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}
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} else {
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$file_id = $file->id;
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}
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$file_redir = File_redirection::staticGet('url', $short_url);
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if (empty($file_redir)) {
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$file_redir = new File_redirection;
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$file_redir->url = $short_url;
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$file_redir->file_id = $file_id;
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$file_redir->insert();
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}
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return $short_url;
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}
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return $long_url;
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}
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function _canonUrl($in_url, $default_scheme = 'http://') {
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if (empty($in_url)) return false;
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$out_url = $in_url;
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$p = parse_url($out_url);
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if (empty($p['host']) || empty($p['scheme'])) {
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list($scheme) = explode(':', $in_url, 2);
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switch ($scheme) {
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case 'fax':
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case 'tel':
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$out_url = str_replace('.-()', '', $out_url);
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break;
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case 'mailto':
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case 'aim':
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case 'jabber':
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case 'xmpp':
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// don't touch anything
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break;
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default:
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$out_url = $default_scheme . ltrim($out_url, '/');
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$p = parse_url($out_url);
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if (empty($p['scheme'])) return false;
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break;
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}
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}
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if (('ftp' == $p['scheme']) || ('http' == $p['scheme']) || ('https' == $p['scheme'])) {
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if (empty($p['host'])) return false;
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if (empty($p['path'])) {
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$out_url .= '/';
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}
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}
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return $out_url;
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}
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function saveNew($data, $file_id, $url) {
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$file_redir = new File_redirection;
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$file_redir->url = $url;
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$file_redir->file_id = $file_id;
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$file_redir->redirections = intval($data['redirects']);
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$file_redir->httpcode = intval($data['code']);
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$file_redir->insert();
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}
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}
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