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