4 * @file include/oembed.php
8 use Friendica\Core\System;
9 use Friendica\ParseUrl;
10 use Friendica\Core\Config;
12 function oembed_replacecb($matches){
13 $embedurl=$matches[1];
14 $j = oembed_fetch_url($embedurl);
15 $s = oembed_format_object($j);
21 * @brief Get data from an URL to embed its content.
23 * @param string $embedurl The URL from which the data should be fetched.
24 * @param bool $no_rich_type If set to true rich type content won't be fetched.
26 * @return bool|object Returns object with embed content or false if no embedable
29 function oembed_fetch_url($embedurl, $no_rich_type = false){
30 $embedurl = trim($embedurl, "'");
31 $embedurl = trim($embedurl, '"');
35 $r = q("SELECT * FROM `oembed` WHERE `url` = '%s'",
36 dbesc(normalise_link($embedurl)));
38 if (dbm::is_result($r)) {
39 $txt = $r[0]["content"];
41 $txt = Cache::get($a->videowidth . $embedurl);
43 // These media files should now be caught in bbcode.php
44 // left here as a fallback in case this is called from another source
46 $noexts = array("mp3", "mp4", "ogg", "ogv", "oga", "ogm", "webm");
47 $ext = pathinfo(strtolower($embedurl), PATHINFO_EXTENSION);
53 if (!in_array($ext, $noexts)){
54 // try oembed autodiscovery
56 $html_text = fetch_url($embedurl, false, $redirects, 15, "text/*");
58 $dom = @DOMDocument::loadHTML($html_text);
60 $xpath = new DOMXPath($dom);
62 $xattr = oe_build_xpath("class","oembed");
63 $entries = $xpath->query("//link[@type='application/json+oembed']");
64 foreach ($entries as $e) {
65 $href = $e->getAttributeNode("href")->nodeValue;
66 $txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
69 $entries = $xpath->query("//link[@type='text/json+oembed']");
70 foreach ($entries as $e) {
71 $href = $e->getAttributeNode("href")->nodeValue;
72 $txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
82 $txt = '{"type":"error"}';
83 } else { //save in cache
84 $j = json_decode($txt);
85 if ($j->type != "error") {
86 dba::insert('oembed', array('url' => normalise_link($embedurl),
87 'content' => $txt, 'created' => datetime_convert()), true);
90 Cache::set($a->videowidth.$embedurl, $txt, CACHE_DAY);
94 $j = json_decode($txt);
100 // Always embed the SSL version
101 if (isset($j->html)) {
102 $j->html = str_replace(array("http://www.youtube.com/", "http://player.vimeo.com/"),
103 array("https://www.youtube.com/", "https://player.vimeo.com/"), $j->html);
106 $j->embedurl = $embedurl;
108 // If fetching information doesn't work, then improve via internal functions
109 if (($j->type == "error") || ($no_rich_type && ($j->type == "rich"))) {
110 $data = ParseUrl::getSiteinfoCached($embedurl, true, false);
111 $j->type = $data["type"];
113 if ($j->type == "photo") {
114 $j->url = $data["url"];
115 //$j->width = $data["images"][0]["width"];
116 //$j->height = $data["images"][0]["height"];
119 if (isset($data["title"])) {
120 $j->title = $data["title"];
123 if (isset($data["text"])) {
124 $j->description = $data["text"];
127 if (is_array($data["images"])) {
128 $j->thumbnail_url = $data["images"][0]["src"];
129 $j->thumbnail_width = $data["images"][0]["width"];
130 $j->thumbnail_height = $data["images"][0]["height"];
134 call_hooks('oembed_fetch_url', $embedurl, $j);
139 function oembed_format_object($j){
140 require_once("mod/proxy.php");
142 $embedurl = $j->embedurl;
143 $jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null) );
144 $ret="<span class='oembed ".$j->type."'>";
147 if (isset($j->thumbnail_url)) {
148 $tw = (isset($j->thumbnail_width) && intval($j->thumbnail_width)) ? $j->thumbnail_width:200;
149 $th = (isset($j->thumbnail_height) && intval($j->thumbnail_height)) ? $j->thumbnail_height:180;
150 // make sure we don't attempt divide by zero, fallback is a 1:1 ratio
151 $tr = (($th) ? $tw/$th : 1);
153 $th=120; $tw = $th*$tr;
154 $tpl=get_markup_template('oembed_video.tpl');
155 $ret.=replace_macros($tpl, array(
156 '$baseurl' => System::baseUrl(),
157 '$embedurl' => $embedurl,
158 '$escapedhtml' => base64_encode($jhtml),
161 '$turl' => $j->thumbnail_url,
170 $ret.= "<img width='".$j->width."' src='".proxy_url($j->url)."'>";
176 if (!Config::get("system","no_oembed_rich_content")) {
177 $ret.= proxy_parse_html($jhtml);
182 // add link to source if not present in "rich" type
183 if ($j->type!='rich' || !strpos($j->html,$embedurl) ){
185 if (isset($j->title)) {
186 if (isset($j->provider_name)) {
187 $ret .= $j->provider_name.": ";
190 $embedlink = (isset($j->title))?$j->title:$embedurl;
191 $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
192 if (isset($j->author_name)) {
193 $ret.=" (".$j->author_name.")";
195 } elseif (isset($j->provider_name) || isset($j->author_name)) {
197 if (isset($j->provider_name)) {
198 $embedlink .= $j->provider_name;
201 if (isset($j->author_name)) {
202 if ($embedlink != "") {
206 $embedlink .= $j->author_name;
208 if (trim($embedlink) == "") {
209 $embedlink = $embedurl;
212 $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
214 //if (isset($j->author_name)) $ret.=" by ".$j->author_name;
215 //if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
218 // add <a> for html2bbcode conversion
219 $ret .= "<a href='$embedurl' rel='oembed'>$embedurl</a>";
222 $ret = str_replace("\n","",$ret);
223 return mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
227 * @brief Generates the iframe HTML for an oembed attachment.
229 * Width and height are given by the remote, and are regularly too small for
230 * the generated iframe.
232 * The width is entirely discarded for the actual width of the post, while fixed
233 * height is used as a starting point before the inevitable resizing.
235 * Since the iframe is automatically resized on load, there are no need for ugly
236 * and impractical scrollbars.
238 * @param string $src Original remote URL to embed
239 * @param string $width
240 * @param string $height
241 * @return string formatted HTML
243 * @see oembed_format_object()
245 function oembed_iframe($src, $width, $height) {
248 if (!$height || strstr($height,'%')) {
253 $s = System::baseUrl() . '/oembed/' . base64url_encode($src);
254 return '<iframe onload="resizeIframe(this);" class="embed_rich" height="' . $height . '" width="' . $width . '" src="' . $s . '" allowfullscreen scrolling="no" frameborder="no">' . t('Embedded content') . '</iframe>';
259 function oembed_bbcode2html($text){
260 $stopoembed = Config::get("system","no_oembed");
261 if ($stopoembed == true){
262 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
264 return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
268 function oe_build_xpath($attr, $value){
269 // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
270 return "contains( normalize-space( @$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 = '$value'";
273 function oe_get_inner_html($node) {
275 $children = $node->childNodes;
276 foreach ($children as $child) {
277 $innerHTML .= $child->ownerDocument->saveXML($child);
283 * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
284 * and replace it with [embed]url[/embed]
286 function oembed_html2bbcode($text) {
287 // start parser only if 'oembed' is in text
288 if (strpos($text, "oembed")) {
290 // convert non ascii chars to html entities
291 $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
293 // If it doesn't parse at all, just return the text.
294 $dom = @DOMDocument::loadHTML($html_text);
298 $xpath = new DOMXPath($dom);
301 $xattr = oe_build_xpath("class","oembed");
302 $entries = $xpath->query("//span[$xattr]");
304 $xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed");
305 foreach ($entries as $e) {
306 $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
307 if (!is_null($href)) {
308 $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
311 return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );