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