261 lines
8.9 KiB
PHP
261 lines
8.9 KiB
PHP
<?php
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// by Pelle Boese (http://seo-mobile.de/) 2007
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// requires PEAR::HTTP_Request (comes with serendipity)
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class serendipity_mobile
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{
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private static $instance = NULL;
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var $isMobileDevice = false;
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var $isIPhone = false;
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var $isAndroid = false;
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private function __construct(&$debug) {
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// detect mobile code by Andy Moore (http://www.andymoore.info/)
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$mobile_browser = '0';
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$user_agent_tolower = strtolower($_SERVER['HTTP_USER_AGENT']);
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if(preg_match('/(up.browser|up.link|windows ce|iemobile|mmp|symbian|smartphone|midp|wap|phone|vodafone|o2|pocket|mobile|pda|psp)/i',$user_agent_tolower)){
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$mobile_browser++;
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}
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if(((strpos(strtolower($_SERVER['HTTP_ACCEPT']),'text/vnd.wap.wml')>0) or (strpos(strtolower($_SERVER['HTTP_ACCEPT']),'application/vnd.wap.xhtml+xml')>0)) or ((((isset($_SERVER['HTTP_X_WAP_PROFILE']) or isset($_SERVER['HTTP_PROFILE']) or isset($_SERVER['X-OperaMini-Features']) or isset($_SERVER['UA-pixels'])))))){
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$mobile_browser++;
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}
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$mobile_ua = strtolower(substr($_SERVER['HTTP_USER_AGENT'],0,4));
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$mobile_agents = array('acs-','alav','alca','amoi','audi','aste','avan','benq','bird','blac','blaz','brew','cell','cldc','cmd-','dang','doco','eric','hipt','inno','ipaq','java','jigs','kddi','keji','leno','lg-c','lg-d','lg-g','lge-','maui','maxo','midp','mits','mmef','mobi','mot-','moto','mwbp','nec-','newt','noki','opwv','palm','pana','pant','pdxg','phil','play','pluc','port','prox','qtek','qwap','sage','sams','sany','sch-','sec-','send','seri','sgh-','shar','sie-','siem','smal','smar','sony','sph-','symb','t-mo','teli','tim-','tosh','tsm-','upg1','upsi','vk-v','voda','wap-','wapa','wapi','wapp','wapr','webc','winw','winw','xda','xda-');
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if(in_array($mobile_ua,$mobile_agents)){
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$mobile_browser++;
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}
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$debug[] = 'Mobile device check returned '.$mobile_browser.' out of 3';
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if($mobile_browser>0) {
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$this->isMobileDevice = true;
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}
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if(strpos($user_agent_tolower,'iphone') !== false) {
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$this->isIPhone = true;
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}
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if(strpos($user_agent_tolower,'android') !== false) {
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$this->isAndroid = true;
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}
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return true;
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}
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public static function getInstance(&$debug) {
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if(self::$instance === NULL)
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{
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self::$instance = new serendipity_mobile($debug);
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}
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return self::$instance;
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}
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private function __clone() {}
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function parseHTML($html, $encoding, $remove_tags, $remove_attributes, &$debug) {
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$dom = new DOMDocument;
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// add html meta-data to entry to fix encoding issues
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$html = '<html><head><meta http-equiv="Content-Type" content="text/html; charset='.$encoding.'"/></head><body>'.$html.'</body></html>';
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$debug[] = 'Added HTML META data with correct charset to entry string';
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// load HTML into DOM a object
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if($dom->loadHTML($html))
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$debug[] = 'DOM successfully parsed';
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else
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$debug[] = 'Couldn\'t parse DOM';
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// remove comments as they only consume bandwidth
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$xpath = new DOMXPath($dom);
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foreach($xpath->query('//comment()') as $comment) {
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$comment->parentNode->removeChild($comment);
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}
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// remove other unwanted tags
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$remove = explode(',', $remove_tags);
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foreach($remove as $v) {
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foreach($xpath->query('//'.$v) as $crap) {
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$crap->parentNode->removeChild($crap);
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}
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$debug[] = 'All '.strtoupper($v).' tags removed';
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}
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// remove unwanted attributes
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$remove = explode(',', $remove_attributes);
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foreach($remove as $v) {
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foreach($xpath->query('//node()[@'.$v.']') as $crap) {
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$crap->removeAttribute($v);
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}
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$debug[] = 'All '.strtoupper($v).' attributes removed';
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}
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return $dom;
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}
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function rewriteWikipediaLinks(&$dom, &$debug) {
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// rewrite wikipedia.org links to the mobile version at wikipedia.7val.com
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$xpath = new DOMXPath($dom);
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foreach($xpath->query("//a[contains(@href,'wikipedia.org')]") as $node) {
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$src = $node->getAttribute('href');
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if(preg_match("#http://([a-z]{2})\.wikipedia\.org/(.+)#i", $src, $o)) {
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$newSrc = 'http://'.$o[1].'.wikipedia.7val.com/'.$o[2];
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$node->setAttribute('href', $newSrc);
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$debug[] = 'Changed Wikipedia link '.$src.' to '.$newSrc;
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}
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}
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}
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function removeImages(&$dom, &$debug) {
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$xpath = new DOMXPath($dom);
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foreach($xpath->query('//img') as $img) {
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$debug[] = 'Removing IMG: '.$img->getAttribute('src');
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// save parent
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$parent = $img->parentNode;
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// remove image
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$img->parentNode->removeChild($img);
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// remove parent node if it has no children anymore
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// might be replaced by a recursive function call in later versions
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if(!$parent->hasChildNodes()) {
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$debug[] = 'Removing empty parent: '.$parent->nodeName;
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$parent->parentNode->removeChild($parent);
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}
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}
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return($dom);
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}
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function removeImagesDimensions(&$dom, &$debug) {
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$xpath = new DOMXPath($dom);
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foreach($xpath->query('//img') as $img) {
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$debug[] = 'Removing IMG Dimension: '.$img->getAttribute('src');
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// save parent
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$img->removeAttribute("width");
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$img->removeAttribute("height");
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}
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return($dom);
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}
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function scaleImages(&$dom, &$serendipity, $width, $pearPath, &$debug) {
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// external script which scales images on the fly
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$imageScriptURL = $serendipity['baseURL'].'plugins/serendipity_event_mobile_output/i.php';
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// we store external images here
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$uploadDir = $serendipity['serendipityPath'] . $serendipity['uploadPath'] . 'plugin_mobile_output/';
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$xpath = new DOMXPath($dom);
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foreach($xpath->query('//img') as $img) {
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$imgSrc = $img->getAttribute('src');
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// get local image
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if(substr($imgSrc,0,1)=='/') {
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$docRoot = $_SERVER['DOCUMENT_ROOT'];
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$imgFile = $docRoot.$imgSrc;
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$externalImage = false;
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}
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// get external image
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if(preg_match("#^(https?://|ftp://)#i",$imgSrc)) {
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require_once($pearPath . 'HTTP/Request.php');
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$imgFile = $uploadDir . base64_encode($imgSrc);
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// if we didn't download the external image yet, fetch it
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if(!file_exists($imgFile)) {
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$this->fetchImage($imgSrc, $imgFile);
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$debug[] = 'Downloading external image '.$imgSrc;
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} else {
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$debug[] = 'External image '.$imgSrc.' already downloaded. Using local version';
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}
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$externalImage = true;
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}
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if(!file_exists($imgFile) || !$size = getimagesize($imgFile)) {
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// not an image? remove it!
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$parent = $img->parentNode;
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$img->parentNode->removeChild($img);
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$debug[] = 'Error scaling IMG: '.$imgSrc.' - removing node from DOM';
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if(!$parent->hasChildNodes()) {
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$debug[] = 'Removing empty parent: '.$parent->nodeName;
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$parent->parentNode->removeChild($parent);
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}
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} else {
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$height = round($size[1] / ($size[0]/$width));
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// to be fixed: remove style, fix width and height
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$img->removeAttribute('style');
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if($size[0] > $width) {
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$img->setAttribute('width',$width);
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$img->setAttribute('height',$height);
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// add alt tag if it's not existant
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if(!$img->getAttribute('alt'))
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$img->setAttribute('alt','');
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// rewrite image src to i.php
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$imgUrl = $imageScriptURL.'?i='.base64_encode(basename($imgFile)).'&s='.base64_encode($size[0].'|'.$size[1].'|'.$width.'|'.$height.'|'.$size['mime']);
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// if we fetched an external image, tell the script to use the seperate folder
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if($externalImage)
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$imgUrl .= '&e=1';
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$img->setAttribute('src', $imgUrl);
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$debug[] = 'Scaling IMG: '.$imgSrc.' to '.$width.'px width and '.$height.'px height';
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} else {
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$img->setAttribute('width',$size[0]);
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$img->setAttribute('height',$size[1]);
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$debug[] = 'Not scaling IMG: '.$imgSrc.' as it is small enough';
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}
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}
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}
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return $dom;
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}
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function cleanUp(&$dom, $encoding, &$debug) {
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$debug[] = 'Cleaning up DOM';
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$xpath = new DOMXPath($dom);
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// copy all child nodes of body in our entry DOM
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foreach($xpath->query('/html/body/node()') as $node) {
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$body .= $dom->saveXML($node);
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}
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$body = iconv('UTF-8', $encoding, $body);
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$debug[] = 'Content successfully prepared';
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return $body;
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}
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// fetch a file using PEAR::HTTP_Request
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function fetchImage($url, $target) {
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$options = array('timeout'=>3.0, 'readTimeout'=>3.0);
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$req = new HTTP_Request($url, $options);
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if(PEAR::isError($req->sendRequest()) || $req->getResponseCode() != '200') {
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return false;
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}
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if(file_exists($target) && filesize($target) > 0) {
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$data = file_get_contents($target);
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} else {
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// Fetch file
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$data = $req->getResponseBody();
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$tdir = dirname($target);
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if(!is_dir($tdir)) {
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return false;
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}
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$fp = @fopen($target, 'w');
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if(!$fp) {
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return false;
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}
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fwrite($fp, $data);
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fclose($fp);
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return true;
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}
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}
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};
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