<?php /** * @file include/oembed.php */ use Friendica\App; use Friendica\Core\Cache; use Friendica\Core\System; use Friendica\ParseUrl; use Friendica\Core\Config; use Friendica\Database\DBM; function oembed_replacecb($matches){ $embedurl=$matches[1]; $j = oembed_fetch_url($embedurl); $s = oembed_format_object($j); return $s; } /** * @brief Get data from an URL to embed its content. * * @param string $embedurl The URL from which the data should be fetched. * @param bool $no_rich_type If set to true rich type content won't be fetched. * * @return bool|object Returns object with embed content or false if no embedable * content exists */ function oembed_fetch_url($embedurl, $no_rich_type = false) { $embedurl = trim($embedurl, "'"); $embedurl = trim($embedurl, '"'); $a = get_app(); $condition = array('url' => normalise_link($embedurl)); $r = dba::select('oembed', array('content'), $condition, array('limit' => 1)); if (DBM::is_result($r)) { $txt = $r["content"]; } else { $txt = Cache::get($a->videowidth . $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=' . $a->videowidth); break; } $entries = $xpath->query("//link[@type='text/json+oembed']"); foreach ($entries as $e) { $href = $e->getAttributeNode("href")->nodeValue; $txt = fetch_url($href . '&maxwidth=' . $a->videowidth); break; } } } } $txt = trim($txt); if ($txt[0] != "{") { $txt = '{"type":"error"}'; } else { //save in cache $j = json_decode($txt); if ($j->type != "error") { dba::insert('oembed', array('url' => normalise_link($embedurl), 'content' => $txt, 'created' => datetime_convert()), true); } Cache::set($a->videowidth.$embedurl, $txt, CACHE_DAY); } } $j = json_decode($txt); if (!is_object($j)) { return false; } // Always embed the SSL version if (isset($j->html)) { $j->html = str_replace(array("http://www.youtube.com/", "http://player.vimeo.com/"), array("https://www.youtube.com/", "https://player.vimeo.com/"), $j->html); } $j->embedurl = $embedurl; // If fetching information doesn't work, then improve via internal functions if (($j->type == "error") || ($no_rich_type && ($j->type == "rich"))) { $data = ParseUrl::getSiteinfoCached($embedurl, true, false); $j->type = $data["type"]; if ($j->type == "photo") { $j->url = $data["url"]; //$j->width = $data["images"][0]["width"]; //$j->height = $data["images"][0]["height"]; } if (isset($data["title"])) { $j->title = $data["title"]; } if (isset($data["text"])) { $j->description = $data["text"]; } if (is_array($data["images"])) { $j->thumbnail_url = $data["images"][0]["src"]; $j->thumbnail_width = $data["images"][0]["width"]; $j->thumbnail_height = $data["images"][0]["height"]; } } call_hooks('oembed_fetch_url', $embedurl, $j); return $j; } function oembed_format_object($j){ require_once("mod/proxy.php"); $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) && intval($j->thumbnail_width)) ? $j->thumbnail_width:200; $th = (isset($j->thumbnail_height) && intval($j->thumbnail_height)) ? $j->thumbnail_height:180; // make sure we don't attempt divide by zero, fallback is a 1:1 ratio $tr = (($th) ? $tw/$th : 1); $th=120; $tw = $th*$tr; $tpl=get_markup_template('oembed_video.tpl'); $ret.=replace_macros($tpl, array( '$baseurl' => System::baseUrl(), '$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."' src='".proxy_url($j->url)."'>"; break; case "link": break; case "rich": // not so safe.. if (!Config::get("system","no_oembed_rich_content")) { $ret.= proxy_parse_html($jhtml); } break; } // add link to source if not present in "rich" type if ($j->type!='rich' || !strpos($j->html,$embedurl) ){ $ret .= "<h4>"; if (isset($j->title)) { if (isset($j->provider_name)) { $ret .= $j->provider_name.": "; } $embedlink = (isset($j->title))?$j->title:$embedurl; $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>"; if (isset($j->author_name)) { $ret.=" (".$j->author_name.")"; } } elseif (isset($j->provider_name) || isset($j->author_name)) { $embedlink = ""; if (isset($j->provider_name)) { $embedlink .= $j->provider_name; } if (isset($j->author_name)) { if ($embedlink != "") { $embedlink .= ": "; } $embedlink .= $j->author_name; } if (trim($embedlink) == "") { $embedlink = $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; $ret .= "</h4>"; } else { // add <a> for html2bbcode conversion $ret .= "<a href='$embedurl' rel='oembed'>$embedurl</a>"; } $ret.="</span>"; $ret = str_replace("\n","",$ret); return mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret)); } /** * @brief Generates the iframe HTML for an oembed attachment. * * Width and height are given by the remote, and are regularly too small for * the generated iframe. * * The width is entirely discarded for the actual width of the post, while fixed * height is used as a starting point before the inevitable resizing. * * Since the iframe is automatically resized on load, there are no need for ugly * and impractical scrollbars. * * @param string $src Original remote URL to embed * @param string $width * @param string $height * @return string formatted HTML * * @see oembed_format_object() */ function oembed_iframe($src, $width, $height) { $a = get_app(); if (!$height || strstr($height,'%')) { $height = '200'; } $width = '100%'; $s = System::baseUrl() . '/oembed/' . base64url_encode($src); return '<iframe onload="resizeIframe(this);" class="embed_rich" height="' . $height . '" width="' . $width . '" src="' . $s . '" allowfullscreen scrolling="no" frameborder="no">' . t('Embedded content') . '</iframe>'; } function oembed_bbcode2html($text){ $stopoembed = Config::get("system","no_oembed"); if ($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; } }