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){
  14
  15         $txt = Cache::get($embedurl);
  16
  17         if(is_null($txt)){
  18                 $txt = "";
  19
  20                 // try oembed autodiscovery
  21                 $redirects = 0;
  22                 $html_text = fetch_url($embedurl, false, $redirects, 15);
  23                 if($html_text){
  24                         $dom = @DOMDocument::loadHTML($html_text);
  25                         if ($dom){
  26                                 $xpath = new DOMXPath($dom);
  27                                 $attr = "oembed";
  28
  29                                 $xattr = oe_build_xpath("class","oembed");
  30                                 $entries = $xpath->query("//link[@type='application/json+oembed']");
  31                                 foreach($entries as $e){
  32                                         $href = $e->getAttributeNode("href")->nodeValue;
  33                                         $txt = fetch_url($href);
  34                                 }
  35                         }
  36                 }
  37
  38                 if ($txt==false || $txt==""){
  39                         // try oohembed service
  40                         $ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl);
  41                         $txt = fetch_url($ourl);
  42                 }
  43
  44                 $txt=trim($txt);
  45                 if ($txt[0]!="{") $txt='{"type":"error"}';
  46
  47                 //save in cache
  48                 Cache::set($embedurl,$txt);
  49
  50         }
  51
  52         $j = json_decode($txt);
  53         $j->embedurl = $embedurl;
  54         return $j;
  55 }
  56
  57 function oembed_format_object($j){
  58         $embedurl = $j->embedurl;
  59         $jhtml = oembed_iframe($j->html,$j->width,$j->height );
  60         $ret="<span class='oembed ".$j->type."'>";
  61         switch ($j->type) {
  62                 case "video": {
  63                         if (isset($j->thumbnail_url)) {
  64                                 $tw = (isset($j->thumbnail_width)) ? $j->thumbnail_width:200;
  65                                 $th = (isset($j->thumbnail_height)) ? $j->thumbnail_height:180;
  66                                 $tr = $tw/$th;
  67
  68                                 $th=120; $tw = $th*$tr;
  69                                 $tpl=get_markup_template('oembed_video.tpl');
  70                                 $ret.=replace_macros($tpl, array(
  71                                         '$embedurl'=>$embedurl,
  72                                         '$escapedhtml'=>base64_encode($jhtml),
  73                                         '$tw'=>$tw,
  74                                         '$th'=>$th,
  75                                         '$turl'=>$j->thumbnail_url,
  76                                 ));
  77
  78                         } else {
  79                                 $ret=$jhtml;
  80                         }
  81                         $ret.="<br>";
  82                 }; break;
  83                 case "photo": {
  84                         $ret.= "<img width='".$j->width."' height='".$j->height."' src='".$j->url."'>";
  85                         $ret.="<br>";
  86                 }; break;
  87                 case "link": {
  88                         //$ret = "<a href='".$embedurl."'>".$j->title."</a>";
  89                 }; break;
  90                 case "rich": {
  91                         // not so safe..
  92                         $ret.= $jhtml;
  93                 }; break;
  94         }
  95
  96         // add link to source if not present in "rich" type
  97         if (  $j->type!='rich' || !strpos($j->html,$embedurl) ){
  98                 $embedlink = (isset($j->title))?$j->title:$embedurl;
  99                 $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
 100                 if (isset($j->author_name)) $ret.=" by ".$j->author_name;
 101                 if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
 102         } else {
 103                 // add <a> for html2bbcode conversion
 104                 $ret .= "<a href='$embedurl' rel='oembed'/>";
 105         }
 106         $ret.="<br style='clear:left'></span>";
 107         return  mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
 108 }
 109
 110 function oembed_iframe($src,$width,$height) {
 111         if(! $width || strstr($width,'%'))
 112                 $width = '640';
 113         if(! $height || strstr($height,'%'))
 114                 $height = '300';
 115         // try and leave some room for the description line.
 116         $height = intval($height) + 80;
 117         $width  = intval($width) + 40;
 118
 119         $s = 'data:text/html;base64,' . base64_encode('<html><body>' . $src . '</body></html>');
 120         return '<iframe height="' . $height . '" width="' . $width . '" src="' . $s . '" frameborder="no" >' . t('Embedded content') . '</iframe>';
 121
 122 }
 123
 124
 125
 126 function oembed_bbcode2html($text){
 127         $stopoembed = get_config("system","no_oembed");
 128         if ($stopoembed == true){
 129                 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
 130         }
 131         return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
 132 }
 133
 134
 135 function oe_build_xpath($attr, $value){
 136         // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
 137         return "contains( normalize-space( @$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'";
 138 }
 139
 140 function oe_get_inner_html( $node ) {
 141     $innerHTML= '';
 142     $children = $node->childNodes;
 143     foreach ($children as $child) {
 144         $innerHTML .= $child->ownerDocument->saveXML( $child );
 145     }
 146     return $innerHTML;
 147 }
 148
 149 /**
 150  * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
 151  * and replace it with [embed]url[/embed]
 152  */
 153 function oembed_html2bbcode($text) {
 154         // start parser only if 'oembed' is in text
 155         if (strpos($text, "oembed")){
 156
 157                 // convert non ascii chars to html entities
 158                 $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
 159
 160                 // If it doesn't parse at all, just return the text.
 161                 $dom = @DOMDocument::loadHTML($html_text);
 162                 if(! $dom)
 163                         return $text;
 164                 $xpath = new DOMXPath($dom);
 165                 $attr = "oembed";
 166
 167                 $xattr = oe_build_xpath("class","oembed");
 168                 $entries = $xpath->query("//span[$xattr]");
 169
 170                 $xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed");
 171                 foreach($entries as $e) {
 172                         $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
 173                         if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
 174                 }
 175                 return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
 176         } else {
 177                 return $text;
 178         }
 179 }
 180
 181
 182