Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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327 satır
9.3 KiB

<?php
/**
* @file include/oembed.php
*/
use \Friendica\ParseUrl;
use \Friendica\Core\Config;
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();
$r = q("SELECT * FROM `oembed` WHERE `url` = '%s'",
dbesc(normalise_link($embedurl)));
if (dbm::is_result($r)) {
$txt = $r[0]["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=' . $a->videowidth);
break;
}
}
}
}
if ($txt==false || $txt=="") {
$embedly = Config::get("system", "embedly");
if ($embedly != "") {
// try embedly service
$ourl = "https://api.embed.ly/1/oembed?key=".$embedly."&url=".urlencode($embedurl);
$txt = fetch_url($ourl);
logger("oembed_fetch_url: ".$txt, LOGGER_DEBUG);
}
}
$txt=trim($txt);
if ($txt[0]!="{") {
$txt='{"type":"error"}';
} else { //save in cache
$j = json_decode($txt);
if ($j->type != "error") {
q("INSERT INTO `oembed` (`url`, `content`, `created`) VALUES ('%s', '%s', '%s')
ON DUPLICATE KEY UPDATE `content` = '%s', `created` = '%s'",
dbesc(normalise_link($embedurl)),
dbesc($txt), dbesc(datetime_convert()),
dbesc($txt), dbesc(datetime_convert()));
}
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") OR ($no_rich_type AND ($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){
$a = get_app();
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' => $a->get_baseurl(),
'$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($j->provider_name) OR isset($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 = $a->get_baseurl() . '/oembed/'.base64url_encode($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;
}
}