gnu-social/classes/File_redirection.php

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<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, 2009, Control Yourself, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
if (!defined('LACONICA')) { exit(1); }
require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
require_once INSTALLDIR.'/classes/File.php';
require_once INSTALLDIR.'/classes/File_oembed.php';
define('USER_AGENT', 'Laconica user agent / file probe');
/**
* Table Definition for file_redirection
*/
class File_redirection extends Memcached_DataObject
{
###START_AUTOCODE
/* the code below is auto generated do not remove the above tag */
public $__table = 'file_redirection'; // table name
public $url; // varchar(255) primary_key not_null
public $file_id; // int(4)
public $redirections; // int(4)
public $httpcode; // int(4)
public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
/* Static get */
function staticGet($k,$v=NULL) { return Memcached_DataObject::staticGet('File_redirection',$k,$v); }
/* the code above is auto generated do not remove the tag below */
###END_AUTOCODE
function _commonCurl($url, $redirs) {
$curlh = curl_init();
curl_setopt($curlh, CURLOPT_URL, $url);
curl_setopt($curlh, CURLOPT_AUTOREFERER, true); // # setup referer header when folowing redirects
curl_setopt($curlh, CURLOPT_CONNECTTIMEOUT, 10); // # seconds to wait
curl_setopt($curlh, CURLOPT_MAXREDIRS, $redirs); // # max number of http redirections to follow
curl_setopt($curlh, CURLOPT_USERAGENT, USER_AGENT);
curl_setopt($curlh, CURLOPT_FOLLOWLOCATION, true); // Follow redirects
curl_setopt($curlh, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curlh, CURLOPT_FILETIME, true);
curl_setopt($curlh, CURLOPT_HEADER, true); // Include header in output
return $curlh;
}
function _redirectWhere_imp($short_url, $redirs = 10, $protected = false) {
if ($redirs < 0) return false;
// let's see if we know this...
$a = File::staticGet('url', $short_url);
if (!empty($a)) {
// this is a direct link to $a->url
return $a->url;
} else {
$b = File_redirection::staticGet('url', $short_url);
if (!empty($b)) {
// this is a redirect to $b->file_id
$a = File::staticGet('id', $b->file_id);
return $a->url;
}
}
$curlh = File_redirection::_commonCurl($short_url, $redirs);
// Don't include body in output
curl_setopt($curlh, CURLOPT_NOBODY, true);
curl_exec($curlh);
$info = curl_getinfo($curlh);
curl_close($curlh);
if (405 == $info['http_code']) {
$curlh = File_redirection::_commonCurl($short_url, $redirs);
curl_exec($curlh);
$info = curl_getinfo($curlh);
curl_close($curlh);
}
if (!empty($info['redirect_count']) && File::isProtected($info['url'])) {
return File_redirection::_redirectWhere_imp($short_url, $info['redirect_count'] - 1, true);
}
$ret = array('code' => $info['http_code']
, 'redirects' => $info['redirect_count']
, 'url' => $info['url']);
if (!empty($info['content_type'])) $ret['type'] = $info['content_type'];
if ($protected) $ret['protected'] = true;
if (!empty($info['download_content_length'])) $ret['size'] = $info['download_content_length'];
if (isset($info['filetime']) && ($info['filetime'] > 0)) $ret['time'] = $info['filetime'];
return $ret;
}
function where($in_url) {
$ret = File_redirection::_redirectWhere_imp($in_url);
return $ret;
}
function makeShort($long_url) {
$canon = File_redirection::_canonUrl($long_url);
$short_url = File_redirection::_userMakeShort($canon);
// Did we get one? Is it shorter?
if (!empty($short_url) && mb_strlen($short_url) < mb_strlen($long_url)) {
return $short_url;
} else {
return $long_url;
}
}
function _userMakeShort($long_url) {
$short_url = common_shorten_url($long_url);
if (!empty($short_url) && $short_url != $long_url) {
$short_url = (string)$short_url;
// store it
$file = File::staticGet('url', $long_url);
if (empty($file)) {
$redir_data = File_redirection::where($long_url);
$file = File::saveNew($redir_data, $long_url);
$file_id = $file->id;
if (!empty($redir_data['oembed']['json'])) {
File_oembed::saveNew($redir_data['oembed']['json'], $file_id);
}
} else {
$file_id = $file->id;
}
$file_redir = File_redirection::staticGet('url', $short_url);
if (empty($file_redir)) {
$file_redir = new File_redirection;
$file_redir->url = $short_url;
$file_redir->file_id = $file_id;
$file_redir->insert();
}
return $short_url;
}
return null;
}
function _canonUrl($in_url, $default_scheme = 'http://') {
if (empty($in_url)) return false;
$out_url = $in_url;
$p = parse_url($out_url);
if (empty($p['host']) || empty($p['scheme'])) {
list($scheme) = explode(':', $in_url, 2);
switch ($scheme) {
case 'fax':
case 'tel':
$out_url = str_replace('.-()', '', $out_url);
break;
case 'mailto':
case 'aim':
case 'jabber':
case 'xmpp':
// don't touch anything
break;
default:
$out_url = $default_scheme . ltrim($out_url, '/');
$p = parse_url($out_url);
if (empty($p['scheme'])) return false;
break;
}
}
if (('ftp' == $p['scheme']) || ('ftps' == $p['scheme']) || ('http' == $p['scheme']) || ('https' == $p['scheme'])) {
if (empty($p['host'])) return false;
if (empty($p['path'])) {
$out_url .= '/';
}
}
return $out_url;
}
function saveNew($data, $file_id, $url) {
$file_redir = new File_redirection;
$file_redir->url = $url;
$file_redir->file_id = $file_id;
$file_redir->redirections = intval($data['redirects']);
$file_redir->httpcode = intval($data['code']);
$file_redir->insert();
}
}