include/oembed.php

   1 <?php
   2 function oembed_replacecb($matches){
   3         $embedurl=$matches[1];
   4         $j = oembed_fetch_url($embedurl);
   5         $s =  oembed_format_object($j);
   6         return $s;
   7 }
   8
   9
  10 function oembed_fetch_url($embedurl, $no_rich_type = false){
  11         $embedurl = trim($embedurl, "'");
  12         $embedurl = trim($embedurl, '"');
  13
  14         $a = get_app();
  15
  16         $txt = Cache::get($a->videowidth . $embedurl);
  17
  18         // These media files should now be caught in bbcode.php
  19         // left here as a fallback in case this is called from another source
  20
  21         $noexts = array("mp3","mp4","ogg","ogv","oga","ogm","webm");
  22         $ext = pathinfo(strtolower($embedurl),PATHINFO_EXTENSION);
  23
  24
  25         if(is_null($txt)){
  26                 $txt = "";
  27
  28                 if (!in_array($ext, $noexts)){
  29                         // try oembed autodiscovery
  30                         $redirects = 0;
  31                         $html_text = fetch_url($embedurl, false, $redirects, 15, "text/*"); /**/
  32                         if($html_text){
  33                                 $dom = @DOMDocument::loadHTML($html_text);
  34                                 if ($dom){
  35                                         $xpath = new DOMXPath($dom);
  36                                         $attr = "oembed";
  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=' . $a->videowidth);
  42                                                 break;
  43                                         }
  44                                         $entries = $xpath->query("//link[@type='text/json+oembed']");
  45                                         foreach($entries as $e){
  46                                                 $href = $e->getAttributeNode("href")->nodeValue;
  47                                                 $txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
  48                                                 break;
  49                                         }
  50                                 }
  51                         }
  52                 }
  53
  54                 if ($txt==false || $txt==""){
  55                         $embedly = get_config("system", "embedly");
  56                         if ($embedly != "") {
  57                                 // try embedly service
  58                                 $ourl = "https://api.embed.ly/1/oembed?key=".$embedly."&url=".urlencode($embedurl);
  59                                 $txt = fetch_url($ourl);
  60
  61                                 logger("oembed_fetch_url: ".$txt, LOGGER_DEBUG);
  62                         }
  63                 }
  64
  65                 $txt=trim($txt);
  66
  67                 if ($txt[0]!="{")
  68                         $txt='{"type":"error"}';
  69                 else    //save in cache
  70                         Cache::set($a->videowidth . $embedurl,$txt, CACHE_DAY);
  71         }
  72
  73         $j = json_decode($txt);
  74
  75         if (!is_object($j))
  76                 return false;
  77
  78         // Always embed the SSL version
  79         if (isset($j->html))
  80                 $j->html = str_replace(array("http://www.youtube.com/", "http://player.vimeo.com/"),
  81                         array("https://www.youtube.com/", "https://player.vimeo.com/"), $j->html);
  82
  83         $j->embedurl = $embedurl;
  84
  85         // If fetching information doesn't work, then improve via internal functions
  86         if (($j->type == "error") OR ($no_rich_type AND ($j->type == "rich"))) {
  87                 require_once("mod/parse_url.php");
  88                 $data = parseurl_getsiteinfo($embedurl, true, false);
  89                 $j->type = $data["type"];
  90
  91                 if ($j->type == "photo") {
  92                         $j->url = $data["url"];
  93                         //$j->width = $data["images"][0]["width"];
  94                         //$j->height = $data["images"][0]["height"];
  95                 }
  96
  97                 if (isset($data["title"]))
  98                         $j->title = $data["title"];
  99
 100                 if (isset($data["text"]))
 101                         $j->description = $data["text"];
 102
 103                 if (is_array($data["images"])) {
 104                         $j->thumbnail_url = $data["images"][0]["src"];
 105                         $j->thumbnail_width = $data["images"][0]["width"];
 106                         $j->thumbnail_height = $data["images"][0]["height"];
 107                 }
 108         }
 109
 110         call_hooks('oembed_fetch_url', $embedurl, $j);
 111
 112         return $j;
 113 }
 114
 115 function oembed_format_object($j){
 116         require_once("mod/proxy.php");
 117
 118         $a = get_app();
 119         $embedurl = $j->embedurl;
 120         $jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null) );
 121         $ret="<span class='oembed ".$j->type."'>";
 122         switch ($j->type) {
 123                 case "video": {
 124                         if (isset($j->thumbnail_url)) {
 125                                 $tw = (isset($j->thumbnail_width) && intval($j->thumbnail_width)) ? $j->thumbnail_width:200;
 126                                 $th = (isset($j->thumbnail_height) && intval($j->thumbnail_height)) ? $j->thumbnail_height:180;
 127                                 // make sure we don't attempt divide by zero, fallback is a 1:1 ratio
 128                                 $tr = (($th) ? $tw/$th : 1);
 129
 130                                 $th=120; $tw = $th*$tr;
 131                                 $tpl=get_markup_template('oembed_video.tpl');
 132                                 $ret.=replace_macros($tpl, array(
 133                                 '$baseurl' => $a->get_baseurl(),
 134                                         '$embedurl'=>$embedurl,
 135                                         '$escapedhtml'=>base64_encode($jhtml),
 136                                         '$tw'=>$tw,
 137                                         '$th'=>$th,
 138                                         '$turl'=>$j->thumbnail_url,
 139                                 ));
 140
 141                         } else {
 142                                 $ret=$jhtml;
 143                         }
 144                         //$ret.="<br>";
 145                 }; break;
 146                 case "photo": {
 147                         $ret.= "<img width='".$j->width."' src='".proxy_url($j->url)."'>";
 148                 }; break;
 149                 case "link": {
 150                 }; break;
 151                 case "rich": {
 152                         // not so safe..
 153                         if (!get_config("system","no_oembed_rich_content"))
 154                                 $ret.= proxy_parse_html($jhtml);
 155                 }; break;
 156         }
 157
 158         // add link to source if not present in "rich" type
 159         if ($j->type!='rich' || !strpos($j->html,$embedurl) ){
 160                 $ret .= "<h4>";
 161                 if (isset($j->title)) {
 162                         if (isset($j->provider_name))
 163                                 $ret .= $j->provider_name.": ";
 164
 165                         $embedlink = (isset($j->title))?$j->title:$embedurl;
 166                         $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
 167                         if (isset($j->author_name))
 168                                 $ret.=" (".$j->author_name.")";
 169                 } elseif (isset($j->provider_name) OR isset($j->author_name)) {
 170                         $embedlink = "";
 171                         if (isset($j->provider_name))
 172                                 $embedlink .= $j->provider_name;
 173
 174                         if (isset($j->author_name)) {
 175                                 if ($embedlink != "")
 176                                         $embedlink .= ": ";
 177
 178                                 $embedlink .= $j->author_name;
 179                         }
 180                         if (trim($embedlink) == "")
 181                                 $embedlink = $embedurl;
 182
 183                         $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
 184                 }
 185                 //if (isset($j->author_name)) $ret.=" by ".$j->author_name;
 186                 //if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
 187                 $ret .= "</h4>";
 188         } else {
 189                 // add <a> for html2bbcode conversion
 190                 $ret .= "<a href='$embedurl' rel='oembed'>$embedurl</a>";
 191         }
 192         $ret.="</span>";
 193         $ret = str_replace("\n","",$ret);
 194         return mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
 195 }
 196
 197 function oembed_iframe($src,$width,$height) {
 198
 199         if(! $width || strstr($width,'%'))
 200                 $width = '640';
 201         if(! $height || strstr($height,'%')) {
 202                 $height = '300';
 203                 $resize = 'onload="resizeIframe(this);"';
 204         } else
 205                 $resize = '';
 206
 207         // try and leave some room for the description line.
 208         $height = intval($height) + 80;
 209         $width  = intval($width) + 40;
 210
 211         $a = get_app();
 212
 213         $s = $a->get_baseurl()."/oembed/".base64url_encode($src);
 214         return '<iframe '.$resize.' class="embed_rich" height="'.$height.'" width="'.$width.'" src="'.$s.'" frameborder="no">'.t('Embedded content').'</iframe>';
 215
 216 }
 217
 218
 219
 220 function oembed_bbcode2html($text){
 221         $stopoembed = get_config("system","no_oembed");
 222         if ($stopoembed == true){
 223                 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
 224         }
 225         return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
 226 }
 227
 228
 229 function oe_build_xpath($attr, $value){
 230         // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
 231         return "contains( normalize-space( @$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'";
 232 }
 233
 234 function oe_get_inner_html( $node ) {
 235     $innerHTML= '';
 236     $children = $node->childNodes;
 237     foreach ($children as $child) {
 238         $innerHTML .= $child->ownerDocument->saveXML( $child );
 239     }
 240     return $innerHTML;
 241 }
 242
 243 /**
 244  * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
 245  * and replace it with [embed]url[/embed]
 246  */
 247 function oembed_html2bbcode($text) {
 248         // start parser only if 'oembed' is in text
 249         if (strpos($text, "oembed")){
 250
 251                 // convert non ascii chars to html entities
 252                 $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
 253
 254                 // If it doesn't parse at all, just return the text.
 255                 $dom = @DOMDocument::loadHTML($html_text);
 256                 if(! $dom)
 257                         return $text;
 258                 $xpath = new DOMXPath($dom);
 259                 $attr = "oembed";
 260
 261                 $xattr = oe_build_xpath("class","oembed");
 262                 $entries = $xpath->query("//span[$xattr]");
 263
 264                 $xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed");
 265                 foreach($entries as $e) {
 266                         $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
 267                         if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
 268                 }
 269                 return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
 270         } else {
 271                 return $text;
 272         }
 273 }