255 lines
9.4 KiB
PHP
255 lines
9.4 KiB
PHP
<?php
|
|
/*
|
|
* StatusNet - the distributed open-source microblogging tool
|
|
* Copyright (C) 2008, 2009, StatusNet, 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('STATUSNET') && !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', 'StatusNet 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,$v); }
|
|
|
|
/* the code above is auto generated do not remove the tag below */
|
|
###END_AUTOCODE
|
|
|
|
static function _commonHttp($url, $redirs) {
|
|
$request = new HTTPClient($url);
|
|
$request->setConfig(array(
|
|
'connect_timeout' => 10, // # seconds to wait
|
|
'max_redirs' => $redirs, // # max number of http redirections to follow
|
|
'follow_redirects' => true, // Follow redirects
|
|
'store_body' => false, // We won't need body content here.
|
|
));
|
|
return $request;
|
|
}
|
|
|
|
function _redirectWhere_imp($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 $a->url;
|
|
}
|
|
}
|
|
|
|
if(strpos($short_url,'://') === false){
|
|
return $short_url;
|
|
}
|
|
try {
|
|
$request = self::_commonHttp($short_url, $redirs);
|
|
// Don't include body in output
|
|
$request->setMethod(HTTP_Request2::METHOD_HEAD);
|
|
$response = $request->send();
|
|
|
|
if (405 == $response->getStatus()) {
|
|
// Server doesn't support HEAD method? Can this really happen?
|
|
// We'll try again as a GET and ignore the response data.
|
|
$request = self::_commonHttp($short_url, $redirs);
|
|
$response = $request->send();
|
|
}
|
|
} catch (Exception $e) {
|
|
// Invalid URL or failure to reach server
|
|
return $short_url;
|
|
}
|
|
|
|
if ($response->getRedirectCount() && File::isProtected($response->getUrl())) {
|
|
// Bump back up the redirect chain until we find a non-protected URL
|
|
return self::_redirectWhere_imp($short_url, $response->getRedirectCount() - 1, true);
|
|
}
|
|
|
|
$ret = array('code' => $response->getStatus()
|
|
, 'redirects' => $response->getRedirectCount()
|
|
, 'url' => $response->getUrl());
|
|
|
|
$type = $response->getHeader('Content-Type');
|
|
if ($type) $ret['type'] = $type;
|
|
if ($protected) $ret['protected'] = true;
|
|
$size = $response->getHeader('Content-Length'); // @fixme bytes?
|
|
if ($size) $ret['size'] = $size;
|
|
$time = $response->getHeader('Last-Modified');
|
|
if ($time) $ret['time'] = strtotime($time);
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* Check if this URL is a redirect and return redir info.
|
|
* If a File record is present for this URL, it is not considered a redirect.
|
|
* If a File_redirection record is present for this URL, the recorded target is returned.
|
|
*
|
|
* If no File or File_redirect record is present, the URL is hit and any
|
|
* redirects are followed, up to 10 levels or until a protected URL is
|
|
* reached.
|
|
*
|
|
* @param string $in_url
|
|
* @return mixed one of:
|
|
* string - target URL, if this is a direct link or a known redirect
|
|
* array - redirect info if this is an *unknown* redirect:
|
|
* associative array with the following elements:
|
|
* code: HTTP status code
|
|
* redirects: count of redirects followed
|
|
* url: URL string of final target
|
|
* type (optional): MIME type from Content-Type header
|
|
* size (optional): byte size from Content-Length header
|
|
* time (optional): timestamp from Last-Modified header
|
|
*/
|
|
function where($in_url) {
|
|
$ret = File_redirection::_redirectWhere_imp($in_url);
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* Shorten a URL with the current user's configured shortening
|
|
* options, if applicable.
|
|
*
|
|
* If it cannot be shortened or the "short" URL is longer than the
|
|
* original, the original is returned.
|
|
*
|
|
* If the referenced item has not been seen before, embedding data
|
|
* may be saved.
|
|
*
|
|
* @param string $long_url
|
|
* @return string
|
|
*/
|
|
function makeShort($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)) {
|
|
// Check if the target URL is itself a redirect...
|
|
$redir_data = File_redirection::where($long_url);
|
|
if (is_array($redir_data)) {
|
|
// We haven't seen the target URL before.
|
|
// Save file and embedding data about it!
|
|
$file = File::saveNew($redir_data, $long_url);
|
|
$file_id = $file->id;
|
|
if (!empty($redir_data['oembed']['json'])) {
|
|
File_oembed::saveNew($redir_data['oembed']['json'], $file_id);
|
|
}
|
|
} else if (is_string($redir_data)) {
|
|
// The file is a known redirect target.
|
|
$file = File::staticGet('url', $redir_data);
|
|
$file_id = $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();
|
|
}
|
|
}
|
|
|