"firewall" setting - block all public pages from the public if configured to do so

[friendica.git] / include / oembed.php

diff --git a/include/oembed.php b/include/oembed.php
index d9bf9f67cf9fef8107f10cf138eb36e08e9422e1..4d2b7185e9a43d2f516a46e62461b605f0150d97 100644 (file)
--- a/include/oembed.php
+++ b/include/oembed.php
@@ -1,16 +1,28 @@
 <?php
 function oembed_replacecb($matches){
   $embedurl=$matches[1];
-  $ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl);  
-  $txt = fetch_url($ourl);
+  
+  $r = q("SELECT v FROM `cache` WHERE k='%s'",
+               dbesc($embedurl));
+  if(count($r)){
+       $txt = $r[0]['v'];
+  } else {
+         $ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl);  
+         $txt = fetch_url($ourl);
+         //save in cache
+         q("INSERT INTO `cache` VALUES ('%s','%s','%s')",
+               dbesc($embedurl),
+               dbesc($txt),
+               dbesc(datetime_convert()));
+  }
   $j = json_decode($txt);
-  $ret="<!-- oembed $embedurl -->";
+  $ret="<span class='oembed'>";
   switch ($j->type) {
     case "video": {
        if (isset($j->thumbnail_url)) {
          $tw = (isset($j->thumbnail_width)) ? $j->thumbnail_width:200;
          $th = (isset($j->thumbnail_height)) ? $j->thumbnail_height:180;
-         $ret = "<a href='#' onclick='this.innerHTML=unescape(\"".urlencode($j->html)."\").replace(/\+/g,\" \"); return false;' >";
+         $ret = "<a href='".$embedurl."' onclick='this.innerHTML=unescape(\"".urlencode($j->html)."\").replace(/\+/g,\" \"); return false;' >";
          $ret.= "<img width='$tw' height='$th' src='".$j->thumbnail_url."'>";
          $ret.= "</a>";
        } else {
@@ -32,17 +44,66 @@ function oembed_replacecb($matches){
   }
   
   $embedlink = (isset($j->title))?$j->title:$embedurl;
-  $ret .= "<a href='$embedurl'>$embedlink</a>";
+  $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
   if (isset($j->author_name)) $ret.=" by ".$j->author_name;
   if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
-  $ret.="<!-- /oembed $embedurl -->";
+  $ret.="</span>";
   return $ret;
 }
 
-function oembed_bbcode($text){
+function oembed_bbcode2html($text){
        $stopoembed = get_config("system","no_oembed");
-       if ($stopoembed == True):
-               return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", "$1" ,$text);
-       return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", oembed_replacecb ,$text);
+       if ($stopoembed == true){
+               return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
+       }
+       return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
+}
+
+
+function oe_build_xpath($attr, $value){
+       // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
+       return "contains( normalize-space( @$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'";
 }
+
+function oe_get_inner_html( $node ) {
+    $innerHTML= '';
+    $children = $node->childNodes;
+    foreach ($children as $child) {
+        $innerHTML .= $child->ownerDocument->saveXML( $child );
+    }
+    return $innerHTML;
+} 
+
+/**
+ * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
+ * and replace it with [embed]url[/embed]
+ */
+function oembed_html2bbcode($text) {
+       // start parser only if 'oembed' is in text
+       if (strpos($text, "oembed")){
+               
+               // convert non ascii chars to html entities
+               $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
+               
+               // If it doesn't parse at all, just return the text.
+               $dom = @DOMDocument::loadHTML($html_text);
+               if(! $dom)
+                       return $text;
+               $xpath = new DOMXPath($dom);
+               $attr = "oembed";
+               
+               $xattr = oe_build_xpath("class","oembed");
+               $entries = $xpath->query("//span[$xattr]");
+               
+               $xattr = oe_build_xpath("rel","oembed");
+               foreach($entries as $e) {
+                       $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
+                       if(!is_null($href)) $e->parentNode->replaceChild(new DOMText("[embed]".$href."[embed]"), $e);
+               }
+               return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
+       } else {
+               return $text;
+       } 
+}
+
 ?>
\ No newline at end of file