forked from GNUsocial/gnu-social
397 lines
15 KiB
PHP
397 lines
15 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('GNUSOCIAL')) { exit(1); }
|
|
|
|
/**
|
|
* Table Definition for file_redirection
|
|
*/
|
|
|
|
class File_redirection extends Managed_DataObject
|
|
{
|
|
###START_AUTOCODE
|
|
/* the code below is auto generated do not remove the above tag */
|
|
|
|
public $__table = 'file_redirection'; // table name
|
|
public $urlhash; // varchar(64) primary_key not_null
|
|
public $url; // text
|
|
public $file_id; // int(4)
|
|
public $redirections; // int(4)
|
|
public $httpcode; // int(4)
|
|
public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
|
|
|
|
/* the code above is auto generated do not remove the tag below */
|
|
###END_AUTOCODE
|
|
|
|
protected $file; /* Cache the associated file sometimes */
|
|
|
|
public static function schemaDef()
|
|
{
|
|
return array(
|
|
'fields' => array(
|
|
'urlhash' => array('type' => 'varchar', 'length' => 64, 'not null' => true, 'description' => 'sha256 hash of the URL'),
|
|
'url' => array('type' => 'text', 'description' => 'short URL (or any other kind of redirect) for file (id)'),
|
|
'file_id' => array('type' => 'int', 'description' => 'short URL for what URL/file'),
|
|
'redirections' => array('type' => 'int', 'description' => 'redirect count'),
|
|
'httpcode' => array('type' => 'int', 'description' => 'HTTP status code (20x, 30x, etc.)'),
|
|
'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
|
|
),
|
|
'primary key' => array('urlhash'),
|
|
'foreign keys' => array(
|
|
'file_redirection_file_id_fkey' => array('file' => array('file_id' => 'id')),
|
|
),
|
|
);
|
|
}
|
|
|
|
static public function getByUrl($url)
|
|
{
|
|
return self::getByPK(array('urlhash' => File::hashurl($url)));
|
|
}
|
|
|
|
static function _commonHttp($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;
|
|
}
|
|
|
|
/**
|
|
* Check if this URL is a redirect and return redir info.
|
|
*
|
|
* Most code should call File_redirection::where instead, to check if we
|
|
* already know that redirection and avoid extra hits to the web.
|
|
*
|
|
* The URL is hit and any redirects are followed, up to 10 levels or until
|
|
* a protected URL is reached.
|
|
*
|
|
* @param string $in_url
|
|
* @return mixed one of:
|
|
* string - target URL, if this is a direct link or can't be followed
|
|
* array - redirect info if this is an *unknown* redirect:
|
|
* associative array with the following elements:
|
|
* code: HTTP status code
|
|
* redirects: count of redirects followed
|
|
* url: URL string of final target
|
|
* type (optional): MIME type from Content-Type header
|
|
* size (optional): byte size from Content-Length header
|
|
* time (optional): timestamp from Last-Modified header
|
|
*/
|
|
static function lookupWhere($short_url, $redirs = 10, $protected = false) {
|
|
if ($redirs < 0) return false;
|
|
|
|
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() || 204 == $response->getStatus()) {
|
|
// HTTP 405 Unsupported Method
|
|
// Server doesn't support HEAD method? Can this really happen?
|
|
// We'll try again as a GET and ignore the response data.
|
|
//
|
|
// HTTP 204 No Content
|
|
// YFrog sends 204 responses back for our HEAD checks, which
|
|
// seems like it may be a logic error in their servers. If
|
|
// we get a 204 back, re-run it as a GET... if there's really
|
|
// no content it'll be cheap. :)
|
|
$request = self::_commonHttp($short_url, $redirs);
|
|
$response = $request->send();
|
|
}
|
|
} catch (Exception $e) {
|
|
// Invalid URL or failure to reach server
|
|
common_log(LOG_ERR, "Error while following redirects for $short_url: " . $e->getMessage());
|
|
return $short_url;
|
|
}
|
|
|
|
if ($response->getRedirectCount() && File::isProtected($response->getUrl())) {
|
|
// Bump back up the redirect chain until we find a non-protected URL
|
|
return self::lookupWhere($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
|
|
* @param boolean $discover true to attempt dereferencing the redirect if we don't know it already
|
|
* @return File_redirection
|
|
*/
|
|
static function where($in_url, $discover=true) {
|
|
$redir = new File_redirection();
|
|
$redir->url = $in_url;
|
|
$redir->urlhash = File::hashurl($redir->url);
|
|
$redir->redirections = 0;
|
|
|
|
try {
|
|
$r = File_redirection::getByUrl($in_url);
|
|
if($r instanceof File_redirection) {
|
|
return $r;
|
|
}
|
|
} catch (NoResultException $e) {
|
|
try {
|
|
$f = File::getByUrl($in_url);
|
|
$redir->file_id = $f->id;
|
|
$redir->file = $f;
|
|
return $redir;
|
|
} catch (NoResultException $e) {
|
|
// Oh well, let's keep going
|
|
}
|
|
}
|
|
|
|
if ($discover) {
|
|
$redir_info = File_redirection::lookupWhere($in_url);
|
|
if(is_string($redir_info)) {
|
|
$redir_info = array('url' => $redir_info);
|
|
}
|
|
|
|
// Double check that we don't already have the resolved URL
|
|
$r = self::where($redir_info['url'], false);
|
|
if (!empty($r->file_id)) {
|
|
return $r;
|
|
}
|
|
|
|
$redir->httpcode = $redir_info['code'];
|
|
$redir->redirections = intval($redir_info['redirects']);
|
|
$redir->file = new File();
|
|
$redir->file->url = $redir_info ? $redir_info['url'] : $in_url;
|
|
$redir->file->mimetype = $redir_info['type'];
|
|
$redir->file->size = $redir_info['size'];
|
|
$redir->file->date = $redir_info['time'];
|
|
if ($redir_info['protected']) {
|
|
$redir->file->protected = true;
|
|
}
|
|
}
|
|
|
|
return $redir;
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
* @param User $user whose shortening options to use; defaults to the current web session user
|
|
* @return string
|
|
*/
|
|
static function makeShort($long_url, $user=null)
|
|
{
|
|
$canon = File_redirection::_canonUrl($long_url);
|
|
|
|
$short_url = File_redirection::_userMakeShort($canon, $user);
|
|
|
|
// Did we get one? Is it shorter?
|
|
|
|
return !empty($short_url) ? $short_url : $long_url;
|
|
}
|
|
|
|
/**
|
|
* 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 $long_url
|
|
* @return string
|
|
*/
|
|
|
|
static function forceShort($long_url, $user)
|
|
{
|
|
$canon = File_redirection::_canonUrl($long_url);
|
|
|
|
$short_url = File_redirection::_userMakeShort($canon, $user, true);
|
|
|
|
// Did we get one? Is it shorter?
|
|
return !empty($short_url) ? $short_url : $long_url;
|
|
}
|
|
|
|
static function _userMakeShort($long_url, User $user=null, $force = false) {
|
|
$short_url = common_shorten_url($long_url, $user, $force);
|
|
if (!empty($short_url) && $short_url != $long_url) {
|
|
$short_url = (string)$short_url;
|
|
// store it
|
|
$file = File::getKV('url', $long_url);
|
|
if (!$file instanceof File) {
|
|
// Check if the target URL is itself a redirect...
|
|
$redir = File_redirection::where($long_url);
|
|
$file = $redir->getFile();
|
|
if (empty($file->id)) {
|
|
$file->saveFile();
|
|
}
|
|
}
|
|
$file_redir = File_redirection::getKV('url', $short_url);
|
|
if (!$file_redir instanceof File_redirection) {
|
|
$file_redir = new File_redirection;
|
|
$file_redir->urlhash = File::hashurl($short_url);
|
|
$file_redir->url = $short_url;
|
|
$file_redir->file_id = $file->id;
|
|
$file_redir->insert();
|
|
}
|
|
return $short_url;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Basic attempt to canonicalize a URL, cleaning up some standard variants
|
|
* such as funny syntax or a missing path. Used internally when cleaning
|
|
* up URLs for storage and following redirect chains.
|
|
*
|
|
* Note that despite being on File_redirect, this function DOES NOT perform
|
|
* any dereferencing of redirects.
|
|
*
|
|
* @param string $in_url input URL
|
|
* @param string $default_scheme if given a bare link; defaults to 'http://'
|
|
* @return string
|
|
*/
|
|
static function _canonUrl($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(':', $in_url, 2);
|
|
switch (strtolower($scheme)) {
|
|
case 'fax':
|
|
case 'tel':
|
|
$out_url = str_replace('.-()', '', $out_url);
|
|
break;
|
|
|
|
case 'mailto':
|
|
case 'magnet':
|
|
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 $out_url;
|
|
}
|
|
|
|
static function saveNew($data, $file_id, $url) {
|
|
$file_redir = new File_redirection;
|
|
$file_redir->urlhash = File::hashurl($url);
|
|
$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();
|
|
}
|
|
|
|
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']) && in_array('urlhash', $schemadef['primary 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 hash of the URL',
|
|
);
|
|
$schemadef['fields']['url'] = array (
|
|
'type' => 'text',
|
|
'description' => 'short URL (or any other kind of redirect) for file (id)',
|
|
);
|
|
unset($schemadef['primary key']);
|
|
$schema->ensureTable($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...";
|
|
}
|
|
|
|
public function getFile() {
|
|
if(empty($this->file) && $this->file_id) {
|
|
$this->file = File::getKV('id', $this->file_id);
|
|
}
|
|
|
|
return $this->file;
|
|
}
|
|
}
|