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