include/oembed.php

   1 <?php
   2 function oembed_replacecb($matches){
   3 //      logger('oembedcb');
   4         $embedurl=$matches[1];
   5         $j = oembed_fetch_url($embedurl);
   6         $s =  oembed_format_object($j);
   7         return $s;//oembed_iframe($s,$j->width,$j->height);
   8
   9
  10 }
  11
  12
  13 function oembed_fetch_url($embedurl){
  14
  15         $txt = Cache::get($embedurl);
  16
  17         // These media files should now be caught in bbcode.php
  18         // left here as a fallback in case this is called from another source
  19
  20         $noexts = array("mp3","mp4","ogg","ogv","oga","ogm","webm");
  21         $ext = pathinfo(strtolower($embedurl),PATHINFO_EXTENSION);
  22
  23
  24         if(is_null($txt)){
  25                 $txt = "";
  26
  27                 if (!in_array($ext, $noexts)){
  28                         // try oembed autodiscovery
  29                         $redirects = 0;
  30                         $html_text = fetch_url($embedurl, false, $redirects, 15, "text/*");
  31                         if($html_text){
  32                                 $dom = @DOMDocument::loadHTML($html_text);
  33                                 if ($dom){
  34                                         $xpath = new DOMXPath($dom);
  35                                         $attr = "oembed";
  36
  37                                         $xattr = oe_build_xpath("class","oembed");
  38                                         $entries = $xpath->query("//link[@type='application/json+oembed']");
  39                                         foreach($entries as $e){
  40                                                 $href = $e->getAttributeNode("href")->nodeValue;
  41                                                 $txt = fetch_url($href . '&maxwidth=425');
  42                                                 break;
  43                                         }
  44                                 }
  45                         }
  46                 }
  47
  48                 if ($txt==false || $txt==""){
  49                         // try oohembed service
  50                         $ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl).'&maxwidth=425';
  51                         $txt = fetch_url($ourl);
  52                 }
  53
  54                 $txt=trim($txt);
  55                 if ($txt[0]!="{") $txt='{"type":"error"}';
  56
  57                 //save in cache
  58                 Cache::set($embedurl,$txt);
  59
  60         }
  61
  62         $j = json_decode($txt);
  63         $j->embedurl = $embedurl;
  64         return $j;
  65 }
  66
  67 function oembed_format_object($j){
  68         $embedurl = $j->embedurl;
  69         $jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null) );
  70         $ret="<span class='oembed ".$j->type."'>";
  71         switch ($j->type) {
  72                 case "video": {
  73                         if (isset($j->thumbnail_url)) {
  74                                 $tw = (isset($j->thumbnail_width)) ? $j->thumbnail_width:200;
  75                                 $th = (isset($j->thumbnail_height)) ? $j->thumbnail_height:180;
  76                                 $tr = $tw/$th;
  77
  78                                 $th=120; $tw = $th*$tr;
  79                                 $tpl=get_markup_template('oembed_video.tpl');
  80                                 $ret.=replace_macros($tpl, array(
  81                                         '$embedurl'=>$embedurl,
  82                                         '$escapedhtml'=>base64_encode($jhtml),
  83                                         '$tw'=>$tw,
  84                                         '$th'=>$th,
  85                                         '$turl'=>$j->thumbnail_url,
  86                                 ));
  87
  88                         } else {
  89                                 $ret=$jhtml;
  90                         }
  91                         $ret.="<br>";
  92                 }; break;
  93                 case "photo": {
  94                         $ret.= "<img width='".$j->width."' height='".$j->height."' src='".$j->url."'>";
  95                         $ret.="<br>";
  96                 }; break;
  97                 case "link": {
  98                         //$ret = "<a href='".$embedurl."'>".$j->title."</a>";
  99                 }; break;
 100                 case "rich": {
 101                         // not so safe..
 102                         $ret.= $jhtml;
 103                 }; break;
 104         }
 105
 106         // add link to source if not present in "rich" type
 107         if (  $j->type!='rich' || !strpos($j->html,$embedurl) ){
 108                 $embedlink = (isset($j->title))?$j->title:$embedurl;
 109                 $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
 110                 if (isset($j->author_name)) $ret.=" by ".$j->author_name;
 111                 if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
 112         } else {
 113                 // add <a> for html2bbcode conversion
 114                 $ret .= "<a href='$embedurl' rel='oembed'/>";
 115         }
 116         $ret.="<br style='clear:left'></span>";
 117         return  mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
 118 }
 119
 120 function oembed_iframe($src,$width,$height) {
 121         if(! $width || strstr($width,'%'))
 122                 $width = '640';
 123         if(! $height || strstr($height,'%'))
 124                 $height = '300';
 125         // try and leave some room for the description line.
 126         $height = intval($height) + 80;
 127         $width  = intval($width) + 40;
 128
 129         $a = get_app();
 130
 131         $s = $a->get_baseurl()."/oembed/".base64url_encode($src);
 132         return '<iframe height="' . $height . '" width="' . $width . '" src="' . $s . '" frameborder="no" >' . t('Embedded content') . '</iframe>';
 133
 134 }
 135
 136
 137
 138 function oembed_bbcode2html($text){
 139         $stopoembed = get_config("system","no_oembed");
 140         if ($stopoembed == true){
 141                 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
 142         }
 143         return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
 144 }
 145
 146
 147 function oe_build_xpath($attr, $value){
 148         // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
 149         return "contains( normalize-space( @$attr ), ' $value ' ) or substring( normalize-space( @$attr ), 1, string-length( '$value' ) + 1 ) = '$value ' or substring( normalize-space( @$attr ), string-length( @$attr ) - string-length( '$value' ) ) = ' $value' or @$attr = '$value'";
 150 }
 151
 152 function oe_get_inner_html( $node ) {
 153     $innerHTML= '';
 154     $children = $node->childNodes;
 155     foreach ($children as $child) {
 156         $innerHTML .= $child->ownerDocument->saveXML( $child );
 157     }
 158     return $innerHTML;
 159 }
 160
 161 /**
 162  * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
 163  * and replace it with [embed]url[/embed]
 164  */
 165 function oembed_html2bbcode($text) {
 166         // start parser only if 'oembed' is in text
 167         if (strpos($text, "oembed")){
 168
 169                 // convert non ascii chars to html entities
 170                 $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
 171
 172                 // If it doesn't parse at all, just return the text.
 173                 $dom = @DOMDocument::loadHTML($html_text);
 174                 if(! $dom)
 175                         return $text;
 176                 $xpath = new DOMXPath($dom);
 177                 $attr = "oembed";
 178
 179                 $xattr = oe_build_xpath("class","oembed");
 180                 $entries = $xpath->query("//span[$xattr]");
 181
 182                 $xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed");
 183                 foreach($entries as $e) {
 184                         $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
 185                         if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
 186                 }
 187                 return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
 188         } else {
 189                 return $text;
 190         }
 191 }
 192
 193
 194