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trace.php
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trace.php
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<?php
/**
* Template functions
*
* These functions prepare the data for assignment to the template engine
*
* @todo comment callback functions
*
* @author Andreas Goetz <cpuidle@gmx.de>
* @package videoDB
* @version $Id: trace.php,v 2.64 2013/03/13 15:27:02 andig2 Exp $
*/
require_once './core/functions.php';
require_once './core/httpclient.php';
// identifier for URL parameter
$urlid = 'videodburl';
$striptags = array('iframe','object','embed','ads','html','head','body','!DOCTYPE');
/**
* Figures out which part of a given URI is server and path
* Result in global $base_server and $base_path variables
*
* @param string $url URI
*/
function get_base($url)
{
global $uri;
$uri = parse_url($url);
if (!$uri['scheme']) $uri['scheme'] = 'http';
if (!$uri['host']) $uri['host'] = 'localhost';
if (!$uri['path']) $uri['path'] = '/';
$uri['server'] = $uri['scheme'].'://'.$uri['host'];
// remove filename from path if recognized file type
$uri['path'] = preg_replace("/^(.*\/)(.*)$/i", '\\1', $uri['path']);
// append trailing / if missing
if (!preg_match("/\/$/", $uri['path'])) $uri['path'] .= '/';
}
/**
* Figures out fully qualified, absolute URI for given (relative) URI,
* using global $base_server and $base_path variables
*
* @param string $url (relative) URI
* @return string fully qualified, absolute URI
*/
function get_full_url($url)
{
global $uri, $config;
// fully qualified?
if (preg_match("/^http:\/\//", $url)) return $url;
// local absolute path?
if (preg_match("/^\//", $url)) {
$url = $uri['server'].$url;
} else {
$url = preg_replace("/^\.\//", '', $url);
$url = $uri['server'].$uri['path'].$url;
}
return $url;
}
/**
* Helper function to enable http(s) redirects
*
* @return string protocol scheme (http or https)
*/
function getScheme()
{
# || strtolower(substr($_SERVER["SERVER_PROTOCOL"],0,5)) != 'https'
return (!isset($_SERVER['HTTPS']) || strtolower($_SERVER['HTTPS']) != 'on') ? 'http' : 'https';
}
/**
* array_delete removes elements from array
*
* @param array $a input array
* @param string $i index to delete from
* @param string $count number of items to delete
* @return array resulting array
*/
function array_delete($a, $i, $count = 1)
{
$result = array_slice($a, 0, $i);
foreach (array_slice($a, $i+$count) as $val)
{
array_push($result, $val);
}
return $result;
}
/**
* Check if this item is already in the database
*/
function is_known_item($id, &$sp_id, &$sp_diskid)
{
$SQL = "SELECT imdbID, id, diskid
FROM ".TBL_DATA."
WHERE imdbID = '".addslashes($id)."'
ORDER BY diskid DESC";
$result = runSQL($SQL);
// do we know this movie?
if (count($result) && isset($result[0]['imdbID']) && adultcheck($result[0]['id']) && check_videopermission(PERM_READ, $result[0]['id']))
{
$sp_id = $result[0]['id'];
$sp_diskid = $result[0]['diskid'];
if (!$sp_diskid) $sp_diskid = 'no_diskid';
return true;
}
return false;
}
function _replace_enclosed_tag_traced($matches)
{
global $urlid, $config, $uri, $page, $iframe;
// quotes
$matches = array_delete($matches, 2);
// get fully qualified url
$url = get_full_url($matches[2]);
$url = preg_replace("/&".session_name()."=[\d|\w]+$/", '', $url);
// show anchor translation if debugging
$note = ($config['debug']) ? "($matches[2] -> $url)" : '';
// enable _top navigation for iframe mode
$top = ($iframe) ? ' target="_top"' : '';
$options = '';
$title = strip_tags($matches[4]);
// what's our host?
$engine = (preg_match('/(imdb|amazon|filmweb)/i', $uri['host'], $m)) ? $m[1] : '';
if ($engine == 'imdb')
{
// imdb
// fix for IMDB speciality: 2nd href inside first one
if (preg_match("/http.*?http/i", $url))
{
return implode('', array_slice($matches,1));
}
// title link?
// either /Title?0328828 (old-style or tiger-redirect)
// or /title/tt0306734/ (new-style)
if (preg_match("#/[Tt]itle(\?|/tt)(\d+)/?(\?|$)#", $url, $m) && $title)
{
// don't link images to avoid matching the imdb page flicker
if (!preg_match("/<img\s+/i", $matches[4]))
{
$append = ' <a href="edit.php?save=1&lookup=2&imdbID='.
urlencode("imdb:".$m[2]).'"'.$top.'><img src="'.img('add.gif').
'" valign="absmiddle" border="0" alt="Add Movie"/></a>';
if (is_known_item('imdb:'.$m[2], $sp_id, $sp_diskid))
{
$append.= ' <a href="show.php?id='.$sp_id.'"'.$top.'><img src="'.img('existing.gif').
'" title='.$sp_diskid.' valign="absmiddle" border="0" alt="Show Movie"/></a>';
}
}
}
}
elseif ($engine == 'amazon')
{
// amazon
if (preg_match("#exec/obidos/tg/detail/-/([0-9A-Z]{10,})/#", $url, $m))
{
$id = $m[1];
$append .= ' <a href="edit.php?save=1&lookup=2&imdbID='.urlencode('amazon:'.$id).
'"><img src="'.img('add.gif').'" valign="absmiddle" border="0" alt="Add Movie"/></a>';
}
}
elseif ($engine == 'filmweb')
{
// filmweb.pl
if (preg_match("/[Ff]ilm[\?\.]id=(\d+)/i", $url, $m) && $title)
{
$append = " <a href=\"edit.php?save=1&engine=filmweb&lookup=1&imdbID=".
urlencode('filmweb:'.$m[1])."&title="."\">".
'<img src="'.img('add.gif').'" valign="absmiddle" border="0" alt="Add Movie"/></a>';
}
}
$url = getScheme().'://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF']."?$urlid=".urlencode($url);
if ($iframe) $url .= "&iframe=".$iframe;
return $matches[1].$url.$matches[3].$matches[4].$note.$matches[5].$append;
}
function _replace_tag($matches)
{
global $urlid, $striptags, $iframe;
$url = get_full_url($matches[4]);
if (in_array('ads', $striptags) && (strtolower($matches[2]) == 'img') && preg_match("/\/ads?\//i", $url)) return '';
// switch on tag
switch (strtolower($matches[2])) {
// attn: order is crucial as $url needs be saved to get overwritten
case 'form' : $append = "<input type='hidden' name='$urlid' value='$url'/>";
$url = getScheme().'://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'];
if ($iframe) $append .= "<input type='hidden' name='iframe' value='$iframe'/>";
break;
case 'area' : $parameters = "?$urlid=".urlencode($url);
$url = getScheme().'://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'];
if ($iframe) $parameters .= "&iframe=".$iframe;
break;
}
return $matches[1].$url.$parameters.$matches[5].$append;
}
function _remove_tag($matches)
{
return '';
}
function imdb_replace_title_callback($matches)
{
global $uri;
$result = $matches[1].$matches[2];
if (preg_match("#/title/tt(.+)/#", $uri['path'], $m))
{
$result .= ' <a href="edit.php?save=1&lookup=2&imdbID='.
urlencode("imdb:".$m[1]).'"><img src="'.img('add.gif').
'" valign="absmiddle" border="0" alt="Add Movie"/></a>';
if (is_known_item('imdb:'.$m[1], $sp_id, $sp_diskid))
{
$result .= ' <a href="show.php?id='.$sp_id.'"><img src="'.img('existing.gif').
'" title='.$sp_diskid.' valign="absmiddle" border="0" alt="Add Movie"/></a>';
}
}
$result .= $matches[3];
return $result;
}
/**
* HTML Code Conversion
*
* Converts HTML elements to allow proxying through trace.php
* e.g. all href's are converted to trace.php?url=href links
*
* When a link of the IMDB movie title format is discovered,
* the "Add Disc" icon is appended, linking to edit.php with the correct disk id
*
* Note: this function is far from complete, more help is desired
*
* @param string $html input HTML code including relative links etc.
* @return string output HTML code with absolute proxied links, forms image maps etc.
*/
function fixup_HTML($html)
{
global $striptags, $config, $uri;
// base
if (preg_match("/<base\s+href=(\"|')(.*?)\\1/i", $html, $matches)) get_base($matches[2]);
// replace unwanted tags
$html = preg_replace_callback("/(<\/?(".join("|",$striptags).")(\s+.*?)?>)/is", '_remove_tag', $html);
// link, map/area
$html = preg_replace_callback("/(<(link|area|base)\s+[^>]*?href\s*=\s*(\"|'))([^>]*?)(\\3.*?>)/is", '_replace_tag', $html);
$html = preg_replace_callback("/(<(link|area|base)\s+[^>]*?href\s*=\s*([^\"']))([\d\w\.\/\+\%-:=&_]+?)(\s*[^>]*?>)/is", '_replace_tag', $html);
// image, frame, script
$html = preg_replace_callback("/(<(ima?ge?|frame|iframe|script)\s+[^>]*?src\s*=\s*(\"|'))([^>]*?)(\\3.*?>)/is", '_replace_tag', $html);
$html = preg_replace_callback("/(<(ima?ge?|frame|iframe|script)\s+[^>]*?src\s*=\s*([^\"']))([\d\w\.\/\+\%-:=&_]+?)(\s*[^>]*?>)/is", '_replace_tag', $html);
// form
$html = preg_replace_callback("/(<(form)\s+[^>]*?action\s*=\s*(\"|'))([^>]*?)(\\3[^>]*?>)/is", '_replace_tag', $html);
$html = preg_replace_callback("/(<(form)\s+[^>]*?action\s*=\s*([^\"']))([\d\w\.\/\+\%-:=&_]+?)(\s*[^>]*?>)/is", '_replace_tag', $html);
// href
$html = preg_replace_callback("/(<a\s+[^>]*?href\s*=\s*(\"|'))([^>]*?)(\\2[^>]*?>)(.*?)(<\/a\s*>)/is", '_replace_enclosed_tag_traced', $html);
$html = preg_replace_callback("/(<a\s+[^>]*?href\s*=\s*())([\d\w\.\/\+\%-:=&_]+)(\s*[^>]*?>)(.*?)(<\/a\s*>)/is", '_replace_enclosed_tag_traced', $html);
// title
if (stristr($uri['host'], 'imdb'))
{
$html = preg_replace_callback("/(<h1>)(.*?)(<span>)/si", 'imdb_replace_title_callback', $html);
// imdb form does not accept utf8
$html = preg_replace("/(form\s+.*?)(>)/i", '\\1 accept-charset="ISO-8859-1" \\2', $html );
}
return $html;
}
function request($urlonly=false)
{
global $urlid, $url;
// get or post?
$pass = ($_POST) ? $_POST : $_GET;
// don't use $_REQUEST or cookies will screw up the query
foreach ($pass as $key => $value)
{
switch ($key)
{
case $urlid:
$url = html_entity_decode(urldecode($value));
break;
case session_name():
case 'videodbreload':
case 'iframe':
break;
default:
if ($request) $request .= "&";
$request .= "$key=$value";
}
}
// going directly to trace.php without options?
if (!$url) $url = 'http://www.imdb.com';
// remove session identifier before request is sent or caching will not work
$url = preg_replace("/&".SID."$/", "", $url);
// workaround for fishy IMDB URLs
$url = preg_replace("/\&/", "&", $url);
// don't fetch, just find target
if ($urlonly) return($url);
// append request parameters
if ($_POST) {
$post = $request;
} elseif ($request) {
$url .= "?".$request;
}
// encode possible spaces, use %20 instead of +
$url = preg_replace('/ /','%20', $url);
$response = httpClient($url, $_GET['videodbreload'] != 'Y', array('post' => $post));
// url after redirect
get_base($response['url']);
if ($response['success'] != true)
{
$page = 'Error: '.$response['error'];
if ($response['header']) $page .= '<br/>Header:<br/>'.nl2br($response['header']);
}
else
{
if (!$cache) putHTTPcache($url.$post, $response);
$page = $response['data'];
}
return $page;
}
// make sure this is a local access
if (!preg_match('/^https?:\/\/'.$_SERVER['SERVER_NAME'].'/i', $_SERVER['HTTP_REFERER']))
{
// errorpage('Access denied', 'Access to trace.php is allowed for local scripts only. Please make sure to send a referer to allow verification!');
}
/**
* iframe modes
* 0: "classic" mode - no use of iframes
* 1: "iframe" mode
* used to display template containing iframe
* 2: "iframe" mode
* used to display iframe contents
*/
if ($iframe == 1)
{
// mode 1: display template with url
$url = request(true);
}
else
{
// mode 0 or 2: fetch data for display
// fetch URL
$fetchtime = time();
$page = request();
$fetchtime = time() - $fetchtime;
// convert HTML for output
$page = fixup_HTML($page);
}
if ($iframe == 2)
{
// mode 2: display data into iframe
echo($page);
exit();
}
// mode 0 or 1: prepare templates
tpl_page('imdbbrowser');
$smarty->assign('url', $url);
$smarty->assign('page', $page);
$smarty->assign('fetchtime', $fetchtime);
// display templates
tpl_display('trace.tpl');
?>