317 lines
9.1 KiB
PHP
317 lines
9.1 KiB
PHP
<?php
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/**
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* @file include/oembed.php
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*/
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use Friendica\App;
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use Friendica\Core\Cache;
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use Friendica\Core\System;
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use Friendica\ParseUrl;
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use Friendica\Core\Config;
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use Friendica\Database\DBM;
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function oembed_replacecb($matches){
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$embedurl=$matches[1];
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$j = oembed_fetch_url($embedurl);
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$s = oembed_format_object($j);
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return $s;
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}
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/**
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* @brief Get data from an URL to embed its content.
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*
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* @param string $embedurl The URL from which the data should be fetched.
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* @param bool $no_rich_type If set to true rich type content won't be fetched.
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*
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* @return bool|object Returns object with embed content or false if no embedable
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* content exists
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*/
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function oembed_fetch_url($embedurl, $no_rich_type = false) {
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$embedurl = trim($embedurl, "'");
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$embedurl = trim($embedurl, '"');
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$a = get_app();
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$condition = array('url' => normalise_link($embedurl));
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$r = dba::select('oembed', array('content'), $condition, array('limit' => 1));
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if (DBM::is_result($r)) {
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$txt = $r["content"];
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} else {
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$txt = Cache::get($a->videowidth . $embedurl);
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}
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// These media files should now be caught in bbcode.php
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// left here as a fallback in case this is called from another source
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$noexts = array("mp3", "mp4", "ogg", "ogv", "oga", "ogm", "webm");
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$ext = pathinfo(strtolower($embedurl), PATHINFO_EXTENSION);
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if (is_null($txt)) {
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$txt = "";
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if (!in_array($ext, $noexts)){
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// try oembed autodiscovery
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$redirects = 0;
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$html_text = fetch_url($embedurl, false, $redirects, 15, "text/*");
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if ($html_text) {
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$dom = @DOMDocument::loadHTML($html_text);
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if ($dom) {
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$xpath = new DOMXPath($dom);
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$attr = "oembed";
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$xattr = oe_build_xpath("class","oembed");
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$entries = $xpath->query("//link[@type='application/json+oembed']");
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foreach ($entries as $e) {
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$href = $e->getAttributeNode("href")->nodeValue;
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$txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
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break;
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}
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$entries = $xpath->query("//link[@type='text/json+oembed']");
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foreach ($entries as $e) {
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$href = $e->getAttributeNode("href")->nodeValue;
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$txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
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break;
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}
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}
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}
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}
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$txt = trim($txt);
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if ($txt[0] != "{") {
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$txt = '{"type":"error"}';
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} else { //save in cache
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$j = json_decode($txt);
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if ($j->type != "error") {
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dba::insert('oembed', array('url' => normalise_link($embedurl),
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'content' => $txt, 'created' => datetime_convert()), true);
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}
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Cache::set($a->videowidth.$embedurl, $txt, CACHE_DAY);
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}
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}
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$j = json_decode($txt);
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if (!is_object($j)) {
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return false;
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}
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// Always embed the SSL version
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if (isset($j->html)) {
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$j->html = str_replace(array("http://www.youtube.com/", "http://player.vimeo.com/"),
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array("https://www.youtube.com/", "https://player.vimeo.com/"), $j->html);
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}
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$j->embedurl = $embedurl;
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// If fetching information doesn't work, then improve via internal functions
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if (($j->type == "error") || ($no_rich_type && ($j->type == "rich"))) {
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$data = ParseUrl::getSiteinfoCached($embedurl, true, false);
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$j->type = $data["type"];
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if ($j->type == "photo") {
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$j->url = $data["url"];
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//$j->width = $data["images"][0]["width"];
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//$j->height = $data["images"][0]["height"];
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}
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if (isset($data["title"])) {
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$j->title = $data["title"];
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}
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if (isset($data["text"])) {
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$j->description = $data["text"];
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}
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if (is_array($data["images"])) {
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$j->thumbnail_url = $data["images"][0]["src"];
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$j->thumbnail_width = $data["images"][0]["width"];
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$j->thumbnail_height = $data["images"][0]["height"];
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}
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}
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call_hooks('oembed_fetch_url', $embedurl, $j);
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return $j;
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}
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function oembed_format_object($j){
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require_once("mod/proxy.php");
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$embedurl = $j->embedurl;
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$jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null) );
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$ret="<span class='oembed ".$j->type."'>";
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switch ($j->type) {
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case "video":
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if (isset($j->thumbnail_url)) {
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$tw = (isset($j->thumbnail_width) && intval($j->thumbnail_width)) ? $j->thumbnail_width:200;
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$th = (isset($j->thumbnail_height) && intval($j->thumbnail_height)) ? $j->thumbnail_height:180;
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// make sure we don't attempt divide by zero, fallback is a 1:1 ratio
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$tr = (($th) ? $tw/$th : 1);
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$th=120; $tw = $th*$tr;
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$tpl=get_markup_template('oembed_video.tpl');
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$ret.=replace_macros($tpl, array(
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'$baseurl' => System::baseUrl(),
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'$embedurl' => $embedurl,
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'$escapedhtml' => base64_encode($jhtml),
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'$tw' => $tw,
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'$th' => $th,
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'$turl' => $j->thumbnail_url,
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));
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} else {
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$ret=$jhtml;
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}
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//$ret.="<br>";
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break;
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case "photo":
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$ret.= "<img width='".$j->width."' src='".proxy_url($j->url)."'>";
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break;
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case "link":
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break;
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case "rich":
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// not so safe..
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if (!Config::get("system","no_oembed_rich_content")) {
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$ret.= proxy_parse_html($jhtml);
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}
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break;
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}
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// add link to source if not present in "rich" type
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if ($j->type!='rich' || !strpos($j->html,$embedurl) ){
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$ret .= "<h4>";
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if (isset($j->title)) {
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if (isset($j->provider_name)) {
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$ret .= $j->provider_name.": ";
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}
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$embedlink = (isset($j->title))?$j->title:$embedurl;
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$ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
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if (isset($j->author_name)) {
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$ret.=" (".$j->author_name.")";
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}
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} elseif (isset($j->provider_name) || isset($j->author_name)) {
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$embedlink = "";
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if (isset($j->provider_name)) {
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$embedlink .= $j->provider_name;
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}
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if (isset($j->author_name)) {
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if ($embedlink != "") {
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$embedlink .= ": ";
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}
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$embedlink .= $j->author_name;
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}
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if (trim($embedlink) == "") {
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$embedlink = $embedurl;
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}
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$ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
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}
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//if (isset($j->author_name)) $ret.=" by ".$j->author_name;
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//if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
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$ret .= "</h4>";
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} else {
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// add <a> for html2bbcode conversion
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$ret .= "<a href='$embedurl' rel='oembed'>$embedurl</a>";
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}
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$ret.="</span>";
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$ret = str_replace("\n","",$ret);
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return mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
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}
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/**
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* @brief Generates the iframe HTML for an oembed attachment.
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*
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* Width and height are given by the remote, and are regularly too small for
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* the generated iframe.
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*
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* The width is entirely discarded for the actual width of the post, while fixed
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* height is used as a starting point before the inevitable resizing.
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*
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* Since the iframe is automatically resized on load, there are no need for ugly
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* and impractical scrollbars.
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*
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* @param string $src Original remote URL to embed
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* @param string $width
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* @param string $height
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* @return string formatted HTML
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*
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* @see oembed_format_object()
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*/
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function oembed_iframe($src, $width, $height) {
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$a = get_app();
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if (!$height || strstr($height,'%')) {
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$height = '200';
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}
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$width = '100%';
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$s = System::baseUrl() . '/oembed/' . base64url_encode($src);
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return '<iframe onload="resizeIframe(this);" class="embed_rich" height="' . $height . '" width="' . $width . '" src="' . $s . '" allowfullscreen scrolling="no" frameborder="no">' . t('Embedded content') . '</iframe>';
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}
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function oembed_bbcode2html($text){
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$stopoembed = Config::get("system","no_oembed");
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if ($stopoembed == true){
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return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
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}
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return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
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}
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function oe_build_xpath($attr, $value){
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// http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
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return "contains( normalize-space( @$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 = '$value'";
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}
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function oe_get_inner_html($node) {
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$innerHTML= '';
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$children = $node->childNodes;
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foreach ($children as $child) {
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$innerHTML .= $child->ownerDocument->saveXML($child);
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}
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return $innerHTML;
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}
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/**
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* Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
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* and replace it with [embed]url[/embed]
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*/
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function oembed_html2bbcode($text) {
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// start parser only if 'oembed' is in text
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if (strpos($text, "oembed")) {
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// convert non ascii chars to html entities
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$html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
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// If it doesn't parse at all, just return the text.
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$dom = @DOMDocument::loadHTML($html_text);
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if (! $dom) {
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return $text;
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}
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$xpath = new DOMXPath($dom);
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$attr = "oembed";
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$xattr = oe_build_xpath("class","oembed");
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$entries = $xpath->query("//span[$xattr]");
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$xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed");
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foreach ($entries as $e) {
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$href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
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if (!is_null($href)) {
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$e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
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}
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}
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return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );
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} else {
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return $text;
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}
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}
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