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         $r = q("SELECT * FROM `oembed` WHERE `url` = '%s'",
  17                 dbesc(normalise_link($embedurl)));
  18
  19         if ($r)
  20                 $txt = $r[0]["content"];
  21         else
  22                 $txt = Cache::get($a->videowidth . $embedurl);
  23
  24         // These media files should now be caught in bbcode.php
  25         // left here as a fallback in case this is called from another source
  26
  27         $noexts = array("mp3","mp4","ogg","ogv","oga","ogm","webm");
  28         $ext = pathinfo(strtolower($embedurl),PATHINFO_EXTENSION);
  29
  30
  31         if(is_null($txt)){
  32                 $txt = "";
  33
  34                 if (!in_array($ext, $noexts)){
  35                         // try oembed autodiscovery
  36                         $redirects = 0;
  37                         $html_text = fetch_url($embedurl, false, $redirects, 15, "text/*"); /**/
  38                         if($html_text){
  39                                 $dom = @DOMDocument::loadHTML($html_text);
  40                                 if ($dom){
  41                                         $xpath = new DOMXPath($dom);
  42                                         $attr = "oembed";
  43                                         $xattr = oe_build_xpath("class","oembed");
  44                                         $entries = $xpath->query("//link[@type='application/json+oembed']");
  45                                         foreach($entries as $e){
  46                                                 $href = $e->getAttributeNode("href")->nodeValue;
  47                                                 $txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
  48                                                 break;
  49                                         }
  50                                         $entries = $xpath->query("//link[@type='text/json+oembed']");
  51                                         foreach($entries as $e){
  52                                                 $href = $e->getAttributeNode("href")->nodeValue;
  53                                                 $txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
  54                                                 break;
  55                                         }
  56                                 }
  57                         }
  58                 }
  59
  60                 if ($txt==false || $txt==""){
  61                         $embedly = get_config("system", "embedly");
  62                         if ($embedly != "") {
  63                                 // try embedly service
  64                                 $ourl = "https://api.embed.ly/1/oembed?key=".$embedly."&url=".urlencode($embedurl);
  65                                 $txt = fetch_url($ourl);
  66
  67                                 logger("oembed_fetch_url: ".$txt, LOGGER_DEBUG);
  68                         }
  69                 }
  70
  71                 $txt=trim($txt);
  72
  73                 if ($txt[0]!="{")
  74                         $txt='{"type":"error"}';
  75                 else {  //save in cache
  76                         $j = json_decode($txt);
  77                         if ($j->type != "error")
  78                                 q("INSERT INTO `oembed` (`url`, `content`, `created`) VALUES ('%s', '%s', '%s')
  79                                         ON DUPLICATE KEY UPDATE `content` = '%s', `created` = '%s'",
  80                                         dbesc(normalise_link($embedurl)),
  81                                         dbesc($txt), dbesc(datetime_convert()),
  82                                         dbesc($txt), dbesc(datetime_convert()));
  83
  84                         Cache::set($a->videowidth.$embedurl,$txt, CACHE_DAY);
  85                 }
  86         }
  87
  88         $j = json_decode($txt);
  89
  90         if (!is_object($j))
  91                 return false;
  92
  93         // Always embed the SSL version
  94         if (isset($j->html))
  95                 $j->html = str_replace(array("http://www.youtube.com/", "http://player.vimeo.com/"),
  96                         array("https://www.youtube.com/", "https://player.vimeo.com/"), $j->html);
  97
  98         $j->embedurl = $embedurl;
  99
 100         // If fetching information doesn't work, then improve via internal functions
 101         if (($j->type == "error") OR ($no_rich_type AND ($j->type == "rich"))) {
 102                 require_once("mod/parse_url.php");
 103                 $data = parseurl_getsiteinfo_cached($embedurl, true, false);
 104                 $j->type = $data["type"];
 105
 106                 if ($j->type == "photo") {
 107                         $j->url = $data["url"];
 108                         //$j->width = $data["images"][0]["width"];
 109                         //$j->height = $data["images"][0]["height"];
 110                 }
 111
 112                 if (isset($data["title"]))
 113                         $j->title = $data["title"];
 114
 115                 if (isset($data["text"]))
 116                         $j->description = $data["text"];
 117
 118                 if (is_array($data["images"])) {
 119                         $j->thumbnail_url = $data["images"][0]["src"];
 120                         $j->thumbnail_width = $data["images"][0]["width"];
 121                         $j->thumbnail_height = $data["images"][0]["height"];
 122                 }
 123         }
 124
 125         call_hooks('oembed_fetch_url', $embedurl, $j);
 126
 127         return $j;
 128 }
 129
 130 function oembed_format_object($j){
 131         require_once("mod/proxy.php");
 132
 133         $a = get_app();
 134         $embedurl = $j->embedurl;
 135         $jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null) );
 136         $ret="<span class='oembed ".$j->type."'>";
 137         switch ($j->type) {
 138                 case "video": {
 139                         if (isset($j->thumbnail_url)) {
 140                                 $tw = (isset($j->thumbnail_width) && intval($j->thumbnail_width)) ? $j->thumbnail_width:200;
 141                                 $th = (isset($j->thumbnail_height) && intval($j->thumbnail_height)) ? $j->thumbnail_height:180;
 142                                 // make sure we don't attempt divide by zero, fallback is a 1:1 ratio
 143                                 $tr = (($th) ? $tw/$th : 1);
 144
 145                                 $th=120; $tw = $th*$tr;
 146                                 $tpl=get_markup_template('oembed_video.tpl');
 147                                 $ret.=replace_macros($tpl, array(
 148                                 '$baseurl' => $a->get_baseurl(),
 149                                         '$embedurl'=>$embedurl,
 150                                         '$escapedhtml'=>base64_encode($jhtml),
 151                                         '$tw'=>$tw,
 152                                         '$th'=>$th,
 153                                         '$turl'=>$j->thumbnail_url,
 154                                 ));
 155
 156                         } else {
 157                                 $ret=$jhtml;
 158                         }
 159                         //$ret.="<br>";
 160                 }; break;
 161                 case "photo": {
 162                         $ret.= "<img width='".$j->width."' src='".proxy_url($j->url)."'>";
 163                 }; break;
 164                 case "link": {
 165                 }; break;
 166                 case "rich": {
 167                         // not so safe..
 168                         if (!get_config("system","no_oembed_rich_content"))
 169                                 $ret.= proxy_parse_html($jhtml);
 170                 }; break;
 171         }
 172
 173         // add link to source if not present in "rich" type
 174         if ($j->type!='rich' || !strpos($j->html,$embedurl) ){
 175                 $ret .= "<h4>";
 176                 if (isset($j->title)) {
 177                         if (isset($j->provider_name))
 178                                 $ret .= $j->provider_name.": ";
 179
 180                         $embedlink = (isset($j->title))?$j->title:$embedurl;
 181                         $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
 182                         if (isset($j->author_name))
 183                                 $ret.=" (".$j->author_name.")";
 184                 } elseif (isset($j->provider_name) OR isset($j->author_name)) {
 185                         $embedlink = "";
 186                         if (isset($j->provider_name))
 187                                 $embedlink .= $j->provider_name;
 188
 189                         if (isset($j->author_name)) {
 190                                 if ($embedlink != "")
 191                                         $embedlink .= ": ";
 192
 193                                 $embedlink .= $j->author_name;
 194                         }
 195                         if (trim($embedlink) == "")
 196                                 $embedlink = $embedurl;
 197
 198                         $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
 199                 }
 200                 //if (isset($j->author_name)) $ret.=" by ".$j->author_name;
 201                 //if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
 202                 $ret .= "</h4>";
 203         } else {
 204                 // add <a> for html2bbcode conversion
 205                 $ret .= "<a href='$embedurl' rel='oembed'>$embedurl</a>";
 206         }
 207         $ret.="</span>";
 208         $ret = str_replace("\n","",$ret);
 209         return mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
 210 }
 211
 212 /**
 213  * Generates the iframe HTML for an oembed attachment. Width and height are given
 214  * by the remote, and are regularly too small for the generated iframe.
 215  *
 216  * The width is entirely discarded for the actual width of the post, while fixed
 217  * height is used as a starting point before the inevitable resizing.
 218  *
 219  * Since the iframe is automatically resized on load, there are no need for ugly
 220  * and impractical scrollbars.
 221  *
 222  * @param string $src Original remote URL to embed
 223  * @param string $width
 224  * @param string $height
 225  * @return string
 226  *
 227  * @see oembed_format_object()
 228  */
 229 function oembed_iframe($src, $width, $height) {
 230         if (!$height || strstr($height,'%')) {
 231                 $height = '200';
 232         }
 233         $width = '100%';
 234
 235         $a = get_app();
 236         $s = $a->get_baseurl() . '/oembed/'.base64url_encode($src);
 237         return '<iframe onload="resizeIframe(this);" class="embed_rich" height="' . $height . '" width="' . $width . '" src="' . $s . '" scrolling="no" frameborder="no">' . t('Embedded content') . '</iframe>';
 238 }
 239
 240
 241
 242 function oembed_bbcode2html($text){
 243         $stopoembed = get_config("system","no_oembed");
 244         if ($stopoembed == true){
 245                 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
 246         }
 247         return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
 248 }
 249
 250
 251 function oe_build_xpath($attr, $value){
 252         // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
 253         return "contains( normalize-space( @$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'";
 254 }
 255
 256 function oe_get_inner_html( $node ) {
 257     $innerHTML= '';
 258     $children = $node->childNodes;
 259     foreach ($children as $child) {
 260         $innerHTML .= $child->ownerDocument->saveXML( $child );
 261     }
 262     return $innerHTML;
 263 }
 264
 265 /**
 266  * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
 267  * and replace it with [embed]url[/embed]
 268  */
 269 function oembed_html2bbcode($text) {
 270         // start parser only if 'oembed' is in text
 271         if (strpos($text, "oembed")){
 272
 273                 // convert non ascii chars to html entities
 274                 $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
 275
 276                 // If it doesn't parse at all, just return the text.
 277                 $dom = @DOMDocument::loadHTML($html_text);
 278                 if(! $dom)
 279                         return $text;
 280                 $xpath = new DOMXPath($dom);
 281                 $attr = "oembed";
 282
 283                 $xattr = oe_build_xpath("class","oembed");
 284                 $entries = $xpath->query("//span[$xattr]");
 285
 286                 $xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed");
 287                 foreach($entries as $e) {
 288                         $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
 289                         if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
 290                 }
 291                 return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
 292         } else {
 293                 return $text;
 294         }
 295 }