diff options
Diffstat (limited to 'include/oembed.php')
| -rw-r--r-- | include/oembed.php | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/include/oembed.php b/include/oembed.php new file mode 100644 index 000000000..1f45d2814 --- /dev/null +++ b/include/oembed.php @@ -0,0 +1,194 @@ +<?php +function oembed_replacecb($matches){ +// logger('oembedcb'); + $embedurl=$matches[1]; + $j = oembed_fetch_url($embedurl); + $s = oembed_format_object($j); + return $s;//oembed_iframe($s,$j->width,$j->height); + + +} + + +function oembed_fetch_url($embedurl){ + + $txt = Cache::get($embedurl); + + // These media files should now be caught in bbcode.php + // left here as a fallback in case this is called from another source + + $noexts = array("mp3","mp4","ogg","ogv","oga","ogm","webm"); + $ext = pathinfo(strtolower($embedurl),PATHINFO_EXTENSION); + + + if(is_null($txt)){ + $txt = ""; + + if (!in_array($ext, $noexts)){ + // try oembed autodiscovery + $redirects = 0; + $html_text = fetch_url($embedurl, false, $redirects, 15, "text/*"); + if($html_text){ + $dom = @DOMDocument::loadHTML($html_text); + if ($dom){ + $xpath = new DOMXPath($dom); + $attr = "oembed"; + + $xattr = oe_build_xpath("class","oembed"); + $entries = $xpath->query("//link[@type='application/json+oembed']"); + foreach($entries as $e){ + $href = $e->getAttributeNode("href")->nodeValue; + $txt = fetch_url($href . '&maxwidth=425'); + break; + } + } + } + } + + if ($txt==false || $txt==""){ + // try oohembed service + $ourl = "http://oohembed.com/oohembed/?url=".urlencode($embedurl).'&maxwidth=425'; + $txt = fetch_url($ourl); + } + + $txt=trim($txt); + if ($txt[0]!="{") $txt='{"type":"error"}'; + + //save in cache + Cache::set($embedurl,$txt); + + } + + $j = json_decode($txt); + $j->embedurl = $embedurl; + return $j; +} + +function oembed_format_object($j){ + $embedurl = $j->embedurl; + $jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null) ); + $ret="<span class='oembed ".$j->type."'>"; + 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; + $tr = $tw/$th; + + $th=120; $tw = $th*$tr; + $tpl=get_markup_template('oembed_video.tpl'); + $ret.=replace_macros($tpl, array( + '$embedurl'=>$embedurl, + '$escapedhtml'=>base64_encode($jhtml), + '$tw'=>$tw, + '$th'=>$th, + '$turl'=>$j->thumbnail_url, + )); + + } else { + $ret=$jhtml; + } + $ret.="<br>"; + }; break; + case "photo": { + $ret.= "<img width='".$j->width."' height='".$j->height."' src='".$j->url."'>"; + $ret.="<br>"; + }; break; + case "link": { + //$ret = "<a href='".$embedurl."'>".$j->title."</a>"; + }; break; + case "rich": { + // not so safe.. + $ret.= $jhtml; + }; break; + } + + // add link to source if not present in "rich" type + if ( $j->type!='rich' || !strpos($j->html,$embedurl) ){ + $embedlink = (isset($j->title))?$j->title:$embedurl; + $ret .= "<a href='$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; + } else { + // add <a> for html2bbcode conversion + $ret .= "<a href='$embedurl' rel='oembed'/>"; + } + $ret.="<br style='clear:left'></span>"; + return mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret)); +} + +function oembed_iframe($src,$width,$height) { + if(! $width || strstr($width,'%')) + $width = '640'; + if(! $height || strstr($height,'%')) + $height = '300'; + // try and leave some room for the description line. + $height = intval($height) + 80; + $width = intval($width) + 40; + + $a = get_app(); + + $s = $a->get_baseurl()."/oembed/".base64url_encode($src); + return '<iframe height="' . $height . '" width="' . $width . '" src="' . $s . '" frameborder="no" >' . t('Embedded content') . '</iframe>'; + +} + + + +function oembed_bbcode2html($text){ + $stopoembed = get_config("system","no_oembed"); + if ($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]"); + + $xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed"); + foreach($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; + } +} + + + |