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         $a = get_app();
  16
  17         $txt = Cache::get($a->videowidth . $embedurl);
  18
  19         // These media files should now be caught in bbcode.php
  20         // left here as a fallback in case this is called from another source
  21
  22         $noexts = array("mp3","mp4","ogg","ogv","oga","ogm","webm");
  23         $ext = pathinfo(strtolower($embedurl),PATHINFO_EXTENSION);
  24
  25
  26         if(is_null($txt)){
  27                 $txt = "";
  28
  29                 if (!in_array($ext, $noexts)){
  30                         // try oembed autodiscovery
  31                         $redirects = 0;
  32                         $html_text = fetch_url($embedurl, false, $redirects, 15, "text/*"); /**/
  33                         if($html_text){
  34                                 $dom = @DOMDocument::loadHTML($html_text);
  35                                 if ($dom){
  36                                         $xpath = new DOMXPath($dom);
  37                                         $attr = "oembed";
  38
  39                                         $xattr = oe_build_xpath("class","oembed");
  40                                         $entries = $xpath->query("//link[@type='application/json+oembed']");
  41                                         foreach($entries as $e){
  42                                                 $href = $e->getAttributeNode("href")->nodeValue;
  43                                                 $txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
  44                                                 break;
  45                                         }
  46                                 }
  47                         }
  48                 }
  49
  50                 if ($txt==false || $txt==""){
  51                         // try oohembed service
  52                         $ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl).'&maxwidth=' . $a->videowidth;
  53                         $txt = fetch_url($ourl);
  54                 }
  55
  56                 $txt=trim($txt);
  57                 if ($txt[0]!="{") $txt='{"type":"error"}';
  58
  59                 //save in cache
  60                 Cache::set($a->videowidth . $embedurl,$txt);
  61
  62         }
  63
  64         $j = json_decode($txt);
  65
  66         if (!is_object($j))
  67                 return false;
  68
  69         $j->embedurl = $embedurl;
  70         return $j;
  71 }
  72
  73 function oembed_format_object($j){
  74         $a = get_app();
  75         $embedurl = $j->embedurl;
  76         $jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null) );
  77         $ret="<span class='oembed ".$j->type."'>";
  78         switch ($j->type) {
  79                 case "video": {
  80                         if (isset($j->thumbnail_url)) {
  81                                 $tw = (isset($j->thumbnail_width) && intval($j->thumbnail_width)) ? $j->thumbnail_width:200;
  82                                 $th = (isset($j->thumbnail_height) && intval($j->thumbnail_height)) ? $j->thumbnail_height:180;
  83                                 // make sure we don't attempt divide by zero, fallback is a 1:1 ratio
  84                                 $tr = (($th) ? $tw/$th : 1);
  85
  86                                 $th=120; $tw = $th*$tr;
  87                                 $tpl=get_markup_template('oembed_video.tpl');
  88                                 $ret.=replace_macros($tpl, array(
  89                                 '$baseurl' => $a->get_baseurl(),
  90                                         '$embedurl'=>$embedurl,
  91                                         '$escapedhtml'=>base64_encode($jhtml),
  92                                         '$tw'=>$tw,
  93                                         '$th'=>$th,
  94                                         '$turl'=>$j->thumbnail_url,
  95                                 ));
  96
  97                         } else {
  98                                 $ret=$jhtml;
  99                         }
 100                         $ret.="<br>";
 101                 }; break;
 102                 case "photo": {
 103                         $ret.= "<img width='".$j->width."' src='".$j->url."'>";
 104                         //$ret.= "<img width='".$j->width."' height='".$j->height."' src='".$j->url."'>";
 105                         $ret.="<br>";
 106                 }; break;
 107                 case "link": {
 108                         //$ret = "<a href='".$embedurl."'>".$j->title."</a>";
 109                 }; break;
 110                 case "rich": {
 111                         // not so safe..
 112                         if (!get_config("system","no_oembed_rich_content"))
 113                                 $ret.= $jhtml;
 114                 }; break;
 115         }
 116
 117         // add link to source if not present in "rich" type
 118         if ($j->type!='rich' || !strpos($j->html,$embedurl) ){
 119                 if (isset($j->title)) {
 120                         if (isset($j->provider_name))
 121                                 $ret .= $j->provider_name.": ";
 122
 123                         $embedlink = (isset($j->title))?$j->title:$embedurl;
 124                         $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
 125                         if (isset($j->author_name))
 126                                 $ret.=" (".$j->author_name.")";
 127                 } elseif (isset($j->provider_name) OR isset($j->author_name)) {
 128                         $embedlink = "";
 129                         if (isset($j->provider_name))
 130                                 $embedlink .= $j->provider_name;
 131
 132                         if (isset($j->author_name)) {
 133                                 if ($embedlink != "")
 134                                         $embedlink .= ": ";
 135
 136                                 $embedlink .= $j->author_name;
 137                         }
 138                         $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
 139                 }
 140                 //if (isset($j->author_name)) $ret.=" by ".$j->author_name;
 141                 //if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
 142         } else {
 143                 // add <a> for html2bbcode conversion
 144                 $ret .= "<a href='$embedurl' rel='oembed'></a>";
 145         }
 146         $ret.="<br style='clear:left'></span>";
 147         return  mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
 148 }
 149
 150 function oembed_iframe($src,$width,$height) {
 151         if(! $width || strstr($width,'%'))
 152                 $width = '640';
 153         if(! $height || strstr($height,'%'))
 154                 $height = '300';
 155         // try and leave some room for the description line.
 156         $height = intval($height) + 80;
 157         $width  = intval($width) + 40;
 158
 159         $a = get_app();
 160
 161         $s = $a->get_baseurl()."/oembed/".base64url_encode($src);
 162         return '<iframe height="' . $height . '" width="' . $width . '" src="' . $s . '" frameborder="no" >' . t('Embedded content') . '</iframe>';
 163
 164 }
 165
 166
 167
 168 function oembed_bbcode2html($text){
 169         $stopoembed = get_config("system","no_oembed");
 170         if ($stopoembed == true){
 171                 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
 172         }
 173         return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
 174 }
 175
 176
 177 function oe_build_xpath($attr, $value){
 178         // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
 179         return "contains( normalize-space( @$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'";
 180 }
 181
 182 function oe_get_inner_html( $node ) {
 183     $innerHTML= '';
 184     $children = $node->childNodes;
 185     foreach ($children as $child) {
 186         $innerHTML .= $child->ownerDocument->saveXML( $child );
 187     }
 188     return $innerHTML;
 189 }
 190
 191 /**
 192  * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
 193  * and replace it with [embed]url[/embed]
 194  */
 195 function oembed_html2bbcode($text) {
 196         // start parser only if 'oembed' is in text
 197         if (strpos($text, "oembed")){
 198
 199                 // convert non ascii chars to html entities
 200                 $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
 201
 202                 // If it doesn't parse at all, just return the text.
 203                 $dom = @DOMDocument::loadHTML($html_text);
 204                 if(! $dom)
 205                         return $text;
 206                 $xpath = new DOMXPath($dom);
 207                 $attr = "oembed";
 208
 209                 $xattr = oe_build_xpath("class","oembed");
 210                 $entries = $xpath->query("//span[$xattr]");
 211
 212                 $xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed");
 213                 foreach($entries as $e) {
 214                         $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
 215                         if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
 216                 }
 217                 return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
 218         } else {
 219                 return $text;
 220         }
 221 }