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