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         $embedurl = trim($embedurl, "'");
  16         $embedurl = trim($embedurl, '"');
  17
  18         $a = get_app();
  19
  20         $txt = Cache::get($a->videowidth . $embedurl);
  21
  22         // These media files should now be caught in bbcode.php
  23         // left here as a fallback in case this is called from another source
  24
  25         $noexts = array("mp3","mp4","ogg","ogv","oga","ogm","webm");
  26         $ext = pathinfo(strtolower($embedurl),PATHINFO_EXTENSION);
  27
  28
  29         if(is_null($txt)){
  30                 $txt = "";
  31
  32                 if (!in_array($ext, $noexts)){
  33                         // try oembed autodiscovery
  34                         $redirects = 0;
  35                         $html_text = fetch_url($embedurl, false, $redirects, 15, "text/*"); /**/
  36                         if($html_text){
  37                                 $dom = @DOMDocument::loadHTML($html_text);
  38                                 if ($dom){
  39                                         $xpath = new DOMXPath($dom);
  40                                         $attr = "oembed";
  41
  42                                         $xattr = oe_build_xpath("class","oembed");
  43                                         $entries = $xpath->query("//link[@type='application/json+oembed']");
  44                                         foreach($entries as $e){
  45                                                 $href = $e->getAttributeNode("href")->nodeValue;
  46                                                 $txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
  47                                                 break;
  48                                         }
  49                                 }
  50                         }
  51                 }
  52
  53                 if ($txt==false || $txt==""){
  54                         $embedly = get_config("system", "embedly");
  55                         if ($embedly == "") {
  56                                 // try oohembed service
  57                                 $ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl).'&maxwidth=' . $a->videowidth;
  58                                 $txt = fetch_url($ourl);
  59                         } else {
  60                                 // try embedly service
  61                                 $ourl = "https://api.embed.ly/1/oembed?key=".$embedly."&url=".urlencode($embedurl);
  62                                 $txt = fetch_url($ourl);
  63                         }
  64
  65                         logger("oembed_fetch_url: ".$txt, LOGGER_DEBUG);
  66                 }
  67
  68                 $txt=trim($txt);
  69                 if ($txt[0]!="{") $txt='{"type":"error"}';
  70
  71                 //save in cache
  72                 Cache::set($a->videowidth . $embedurl,$txt);
  73
  74         }
  75
  76         $j = json_decode($txt);
  77
  78         if (!is_object($j))
  79                 return false;
  80
  81         $j->embedurl = $embedurl;
  82         return $j;
  83 }
  84
  85 function oembed_format_object($j){
  86         $a = get_app();
  87         $embedurl = $j->embedurl;
  88         $jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null) );
  89         $ret="<span class='oembed ".$j->type."'>";
  90         switch ($j->type) {
  91                 case "video": {
  92                         if (isset($j->thumbnail_url)) {
  93                                 $tw = (isset($j->thumbnail_width) && intval($j->thumbnail_width)) ? $j->thumbnail_width:200;
  94                                 $th = (isset($j->thumbnail_height) && intval($j->thumbnail_height)) ? $j->thumbnail_height:180;
  95                                 // make sure we don't attempt divide by zero, fallback is a 1:1 ratio
  96                                 $tr = (($th) ? $tw/$th : 1);
  97
  98                                 $th=120; $tw = $th*$tr;
  99                                 $tpl=get_markup_template('oembed_video.tpl');
 100                                 $ret.=replace_macros($tpl, array(
 101                                 '$baseurl' => $a->get_baseurl(),
 102                                         '$embedurl'=>$embedurl,
 103                                         '$escapedhtml'=>base64_encode($jhtml),
 104                                         '$tw'=>$tw,
 105                                         '$th'=>$th,
 106                                         '$turl'=>$j->thumbnail_url,
 107                                 ));
 108
 109                         } else {
 110                                 $ret=$jhtml;
 111                         }
 112                         $ret.="<br>";
 113                 }; break;
 114                 case "photo": {
 115                         $ret.= "<img width='".$j->width."' src='".$j->url."'>";
 116                         //$ret.= "<img width='".$j->width."' height='".$j->height."' src='".$j->url."'>";
 117                         $ret.="<br>";
 118                 }; break;
 119                 case "link": {
 120                         //$ret = "<a href='".$embedurl."'>".$j->title."</a>";
 121                 }; break;
 122                 case "rich": {
 123                         // not so safe..
 124                         if (!get_config("system","no_oembed_rich_content"))
 125                                 $ret.= $jhtml;
 126                 }; break;
 127         }
 128
 129         // add link to source if not present in "rich" type
 130         if ($j->type!='rich' || !strpos($j->html,$embedurl) ){
 131                 if (isset($j->title)) {
 132                         if (isset($j->provider_name))
 133                                 $ret .= $j->provider_name.": ";
 134
 135                         $embedlink = (isset($j->title))?$j->title:$embedurl;
 136                         $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
 137                         if (isset($j->author_name))
 138                                 $ret.=" (".$j->author_name.")";
 139                 } elseif (isset($j->provider_name) OR isset($j->author_name)) {
 140                         $embedlink = "";
 141                         if (isset($j->provider_name))
 142                                 $embedlink .= $j->provider_name;
 143
 144                         if (isset($j->author_name)) {
 145                                 if ($embedlink != "")
 146                                         $embedlink .= ": ";
 147
 148                                 $embedlink .= $j->author_name;
 149                         }
 150                         $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
 151                 }
 152                 //if (isset($j->author_name)) $ret.=" by ".$j->author_name;
 153                 //if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
 154         } else {
 155                 // add <a> for html2bbcode conversion
 156                 $ret .= "<a href='$embedurl' rel='oembed'></a>";
 157         }
 158         $ret.="<br style='clear:left'></span>";
 159         return  mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
 160 }
 161
 162 function oembed_iframe($src,$width,$height) {
 163         if(! $width || strstr($width,'%'))
 164                 $width = '640';
 165         if(! $height || strstr($height,'%'))
 166                 $height = '300';
 167         // try and leave some room for the description line.
 168         $height = intval($height) + 80;
 169         $width  = intval($width) + 40;
 170
 171         $a = get_app();
 172
 173         $s = $a->get_baseurl()."/oembed/".base64url_encode($src);
 174         return '<iframe height="' . $height . '" width="' . $width . '" src="' . $s . '" frameborder="no" >' . t('Embedded content') . '</iframe>';
 175
 176 }
 177
 178
 179
 180 function oembed_bbcode2html($text){
 181         $stopoembed = get_config("system","no_oembed");
 182         if ($stopoembed == true){
 183                 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
 184         }
 185         return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
 186 }
 187
 188
 189 function oe_build_xpath($attr, $value){
 190         // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
 191         return "contains( normalize-space( @$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'";
 192 }
 193
 194 function oe_get_inner_html( $node ) {
 195     $innerHTML= '';
 196     $children = $node->childNodes;
 197     foreach ($children as $child) {
 198         $innerHTML .= $child->ownerDocument->saveXML( $child );
 199     }
 200     return $innerHTML;
 201 }
 202
 203 /**
 204  * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
 205  * and replace it with [embed]url[/embed]
 206  */
 207 function oembed_html2bbcode($text) {
 208         // start parser only if 'oembed' is in text
 209         if (strpos($text, "oembed")){
 210
 211                 // convert non ascii chars to html entities
 212                 $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
 213
 214                 // If it doesn't parse at all, just return the text.
 215                 $dom = @DOMDocument::loadHTML($html_text);
 216                 if(! $dom)
 217                         return $text;
 218                 $xpath = new DOMXPath($dom);
 219                 $attr = "oembed";
 220
 221                 $xattr = oe_build_xpath("class","oembed");
 222                 $entries = $xpath->query("//span[$xattr]");
 223
 224                 $xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed");
 225                 foreach($entries as $e) {
 226                         $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
 227                         if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
 228                 }
 229                 return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
 230         } else {
 231                 return $text;
 232         }
 233 }