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, $no_rich_type = false){
  14         $embedurl = trim($embedurl, "'");
  15         $embedurl = trim($embedurl, '"');
  16
  17         $a = get_app();
  18
  19         $txt = Cache::get($a->videowidth . $embedurl);
  20
  21         // These media files should now be caught in bbcode.php
  22         // left here as a fallback in case this is called from another source
  23
  24         $noexts = array("mp3","mp4","ogg","ogv","oga","ogm","webm");
  25         $ext = pathinfo(strtolower($embedurl),PATHINFO_EXTENSION);
  26
  27
  28         if(is_null($txt)){
  29                 $txt = "";
  30
  31                 if (!in_array($ext, $noexts)){
  32                         // try oembed autodiscovery
  33                         $redirects = 0;
  34                         $html_text = fetch_url($embedurl, false, $redirects, 15, "text/*"); /**/
  35                         if($html_text){
  36                                 $dom = @DOMDocument::loadHTML($html_text);
  37                                 if ($dom){
  38                                         $xpath = new DOMXPath($dom);
  39                                         $attr = "oembed";
  40                                         $xattr = oe_build_xpath("class","oembed");
  41                                         $entries = $xpath->query("//link[@type='application/json+oembed']");
  42                                         foreach($entries as $e){
  43                                                 $href = $e->getAttributeNode("href")->nodeValue;
  44                                                 $txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
  45                                                 break;
  46                                         }
  47                                         $entries = $xpath->query("//link[@type='text/json+oembed']");
  48                                         foreach($entries as $e){
  49                                                 $href = $e->getAttributeNode("href")->nodeValue;
  50                                                 $txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
  51                                                 break;
  52                                         }
  53                                 }
  54                         }
  55                 }
  56
  57                 if ($txt==false || $txt==""){
  58                         $embedly = get_config("system", "embedly");
  59                         if ($embedly == "") {
  60                                 // try oohembed service
  61                                 $ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl).'&maxwidth=' . $a->videowidth;
  62                                 $txt = fetch_url($ourl);
  63                         } else {
  64                                 // try embedly service
  65                                 $ourl = "https://api.embed.ly/1/oembed?key=".$embedly."&url=".urlencode($embedurl);
  66                                 $txt = fetch_url($ourl);
  67                         }
  68
  69                         logger("oembed_fetch_url: ".$txt, LOGGER_DEBUG);
  70                 }
  71
  72                 $txt=trim($txt);
  73                 if ($txt[0]!="{") $txt='{"type":"error"}';
  74
  75                 //save in cache
  76                 Cache::set($a->videowidth . $embedurl,$txt);
  77
  78         }
  79
  80         $j = json_decode($txt);
  81
  82         if (!is_object($j))
  83                 return false;
  84
  85         // Always embed the SSL version
  86         if (isset($j->html))
  87                 $j->html = str_replace(array("http://www.youtube.com/", "http://player.vimeo.com/"),
  88                         array("https://www.youtube.com/", "https://player.vimeo.com/"), $j->html);
  89
  90         $j->embedurl = $embedurl;
  91
  92         // If fetching information doesn't work, then improve via internal functions
  93         if (($j->type == "error") OR ($no_rich_type AND ($j->type == "rich"))) {
  94                 require_once("mod/parse_url.php");
  95                 $data = parseurl_getsiteinfo($embedurl, true, false);
  96                 $j->type = $data["type"];
  97
  98                 if ($j->type == "photo") {
  99                         $j->url = $data["url"];
 100                         //$j->width = $data["images"][0]["width"];
 101                         //$j->height = $data["images"][0]["height"];
 102                 }
 103
 104                 if (isset($data["title"]))
 105                         $j->title = $data["title"];
 106
 107                 if (isset($data["text"]))
 108                         $j->description = $data["text"];
 109
 110                 if (is_array($data["images"])) {
 111                         $j->thumbnail_url = $data["images"][0]["src"];
 112                         $j->thumbnail_width = $data["images"][0]["width"];
 113                         $j->thumbnail_height = $data["images"][0]["height"];
 114                 }
 115         }
 116
 117         call_hooks('oembed_fetch_url', $embedurl, $j);
 118
 119         return $j;
 120 }
 121
 122 function oembed_format_object($j){
 123         require_once("mod/proxy.php");
 124
 125         $a = get_app();
 126         $embedurl = $j->embedurl;
 127         $jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null) );
 128         $ret="<span class='oembed ".$j->type."'>";
 129         switch ($j->type) {
 130                 case "video": {
 131                         if (isset($j->thumbnail_url)) {
 132                                 $tw = (isset($j->thumbnail_width) && intval($j->thumbnail_width)) ? $j->thumbnail_width:200;
 133                                 $th = (isset($j->thumbnail_height) && intval($j->thumbnail_height)) ? $j->thumbnail_height:180;
 134                                 // make sure we don't attempt divide by zero, fallback is a 1:1 ratio
 135                                 $tr = (($th) ? $tw/$th : 1);
 136
 137                                 $th=120; $tw = $th*$tr;
 138                                 $tpl=get_markup_template('oembed_video.tpl');
 139                                 $ret.=replace_macros($tpl, array(
 140                                 '$baseurl' => $a->get_baseurl(),
 141                                         '$embedurl'=>$embedurl,
 142                                         '$escapedhtml'=>base64_encode($jhtml),
 143                                         '$tw'=>$tw,
 144                                         '$th'=>$th,
 145                                         '$turl'=>$j->thumbnail_url,
 146                                 ));
 147
 148                         } else {
 149                                 $ret=$jhtml;
 150                         }
 151                         $ret.="<br>";
 152                 }; break;
 153                 case "photo": {
 154                         $ret.= "<img width='".$j->width."' src='".proxy_url($j->url)."'>";
 155                         //$ret.= "<img width='".$j->width."' height='".$j->height."' src='".proxy_url($j->url)."'>";
 156                         $ret.="<br>";
 157                 }; break;
 158                 case "link": {
 159                         //$ret = "<a href='".$embedurl."'>".$j->title."</a>";
 160                 }; break;
 161                 case "rich": {
 162                         // not so safe..
 163                         if (!get_config("system","no_oembed_rich_content"))
 164                                 $ret.= $jhtml;
 165                 }; break;
 166         }
 167
 168         // add link to source if not present in "rich" type
 169         if ($j->type!='rich' || !strpos($j->html,$embedurl) ){
 170                 $ret .= "<h4>";
 171                 if (isset($j->title)) {
 172                         if (isset($j->provider_name))
 173                                 $ret .= $j->provider_name.": ";
 174
 175                         $embedlink = (isset($j->title))?$j->title:$embedurl;
 176                         $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
 177                         if (isset($j->author_name))
 178                                 $ret.=" (".$j->author_name.")";
 179                 } elseif (isset($j->provider_name) OR isset($j->author_name)) {
 180                         $embedlink = "";
 181                         if (isset($j->provider_name))
 182                                 $embedlink .= $j->provider_name;
 183
 184                         if (isset($j->author_name)) {
 185                                 if ($embedlink != "")
 186                                         $embedlink .= ": ";
 187
 188                                 $embedlink .= $j->author_name;
 189                         }
 190                         if (trim($embedlink) == "")
 191                                 $embedlink = $embedurl;
 192
 193                         $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
 194                 }
 195                 //if (isset($j->author_name)) $ret.=" by ".$j->author_name;
 196                 //if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
 197                 $ret .= "</h4>";
 198         } else {
 199                 // add <a> for html2bbcode conversion
 200                 $ret .= "<a href='$embedurl' rel='oembed'>$embedurl</a>";
 201                 $ret .= "<br style='clear:left'>";
 202         }
 203         $ret.="</span>";
 204         return  mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
 205 }
 206
 207 function oembed_iframe($src,$width,$height) {
 208
 209         if(! $width || strstr($width,'%'))
 210                 $width = '640';
 211         if(! $height || strstr($height,'%')) {
 212                 $height = '300';
 213                 $resize = 'onload="resizeIframe(this);"';
 214         } else
 215                 $resize = '';
 216
 217         // try and leave some room for the description line.
 218         $height = intval($height) + 80;
 219         $width  = intval($width) + 40;
 220
 221         $a = get_app();
 222
 223         $s = $a->get_baseurl()."/oembed/".base64url_encode($src);
 224         return '<iframe '.$resize.' class="embed_rich" height="'.$height.'" width="'.$width.'" src="'.$s.'" frameborder="no">'.t('Embedded content').'</iframe>';
 225
 226 }
 227
 228
 229
 230 function oembed_bbcode2html($text){
 231         $stopoembed = get_config("system","no_oembed");
 232         if ($stopoembed == true){
 233                 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
 234         }
 235         return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
 236 }
 237
 238
 239 function oe_build_xpath($attr, $value){
 240         // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
 241         return "contains( normalize-space( @$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'";
 242 }
 243
 244 function oe_get_inner_html( $node ) {
 245     $innerHTML= '';
 246     $children = $node->childNodes;
 247     foreach ($children as $child) {
 248         $innerHTML .= $child->ownerDocument->saveXML( $child );
 249     }
 250     return $innerHTML;
 251 }
 252
 253 /**
 254  * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
 255  * and replace it with [embed]url[/embed]
 256  */
 257 function oembed_html2bbcode($text) {
 258         // start parser only if 'oembed' is in text
 259         if (strpos($text, "oembed")){
 260
 261                 // convert non ascii chars to html entities
 262                 $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
 263
 264                 // If it doesn't parse at all, just return the text.
 265                 $dom = @DOMDocument::loadHTML($html_text);
 266                 if(! $dom)
 267                         return $text;
 268                 $xpath = new DOMXPath($dom);
 269                 $attr = "oembed";
 270
 271                 $xattr = oe_build_xpath("class","oembed");
 272                 $entries = $xpath->query("//span[$xattr]");
 273
 274                 $xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed");
 275                 foreach($entries as $e) {
 276                         $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
 277                         if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
 278                 }
 279                 return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
 280         } else {
 281                 return $text;
 282         }
 283 }