4 * @file include/oembed.php
8 use Friendica\Core\System;
9 use Friendica\ParseUrl;
10 use Friendica\Core\Config;
11 use Friendica\Database\DBM;
13 function oembed_replacecb($matches){
14 $embedurl=$matches[1];
15 $j = oembed_fetch_url($embedurl);
16 $s = oembed_format_object($j);
22 * @brief Get data from an URL to embed its content.
24 * @param string $embedurl The URL from which the data should be fetched.
25 * @param bool $no_rich_type If set to true rich type content won't be fetched.
27 * @return bool|object Returns object with embed content or false if no embedable
30 function oembed_fetch_url($embedurl, $no_rich_type = false){
31 $embedurl = trim($embedurl, "'");
32 $embedurl = trim($embedurl, '"');
36 $r = q("SELECT * FROM `oembed` WHERE `url` = '%s'",
37 dbesc(normalise_link($embedurl)));
39 if (DBM::is_result($r)) {
40 $txt = $r[0]["content"];
42 $txt = Cache::get($a->videowidth . $embedurl);
44 // These media files should now be caught in bbcode.php
45 // left here as a fallback in case this is called from another source
47 $noexts = array("mp3", "mp4", "ogg", "ogv", "oga", "ogm", "webm");
48 $ext = pathinfo(strtolower($embedurl), PATHINFO_EXTENSION);
54 if (!in_array($ext, $noexts)){
55 // try oembed autodiscovery
57 $html_text = fetch_url($embedurl, false, $redirects, 15, "text/*");
59 $dom = @DOMDocument::loadHTML($html_text);
61 $xpath = new DOMXPath($dom);
63 $xattr = oe_build_xpath("class","oembed");
64 $entries = $xpath->query("//link[@type='application/json+oembed']");
65 foreach ($entries as $e) {
66 $href = $e->getAttributeNode("href")->nodeValue;
67 $txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
70 $entries = $xpath->query("//link[@type='text/json+oembed']");
71 foreach ($entries as $e) {
72 $href = $e->getAttributeNode("href")->nodeValue;
73 $txt = fetch_url($href . '&maxwidth=' . $a->videowidth);
83 $txt = '{"type":"error"}';
84 } else { //save in cache
85 $j = json_decode($txt);
86 if ($j->type != "error") {
87 dba::insert('oembed', array('url' => normalise_link($embedurl),
88 'content' => $txt, 'created' => datetime_convert()), true);
91 Cache::set($a->videowidth.$embedurl, $txt, CACHE_DAY);
95 $j = json_decode($txt);
101 // Always embed the SSL version
102 if (isset($j->html)) {
103 $j->html = str_replace(array("http://www.youtube.com/", "http://player.vimeo.com/"),
104 array("https://www.youtube.com/", "https://player.vimeo.com/"), $j->html);
107 $j->embedurl = $embedurl;
109 // If fetching information doesn't work, then improve via internal functions
110 if (($j->type == "error") || ($no_rich_type && ($j->type == "rich"))) {
111 $data = ParseUrl::getSiteinfoCached($embedurl, true, false);
112 $j->type = $data["type"];
114 if ($j->type == "photo") {
115 $j->url = $data["url"];
116 //$j->width = $data["images"][0]["width"];
117 //$j->height = $data["images"][0]["height"];
120 if (isset($data["title"])) {
121 $j->title = $data["title"];
124 if (isset($data["text"])) {
125 $j->description = $data["text"];
128 if (is_array($data["images"])) {
129 $j->thumbnail_url = $data["images"][0]["src"];
130 $j->thumbnail_width = $data["images"][0]["width"];
131 $j->thumbnail_height = $data["images"][0]["height"];
135 call_hooks('oembed_fetch_url', $embedurl, $j);
140 function oembed_format_object($j){
141 require_once("mod/proxy.php");
143 $embedurl = $j->embedurl;
144 $jhtml = oembed_iframe($j->embedurl,(isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null) );
145 $ret="<span class='oembed ".$j->type."'>";
148 if (isset($j->thumbnail_url)) {
149 $tw = (isset($j->thumbnail_width) && intval($j->thumbnail_width)) ? $j->thumbnail_width:200;
150 $th = (isset($j->thumbnail_height) && intval($j->thumbnail_height)) ? $j->thumbnail_height:180;
151 // make sure we don't attempt divide by zero, fallback is a 1:1 ratio
152 $tr = (($th) ? $tw/$th : 1);
154 $th=120; $tw = $th*$tr;
155 $tpl=get_markup_template('oembed_video.tpl');
156 $ret.=replace_macros($tpl, array(
157 '$baseurl' => System::baseUrl(),
158 '$embedurl' => $embedurl,
159 '$escapedhtml' => base64_encode($jhtml),
162 '$turl' => $j->thumbnail_url,
171 $ret.= "<img width='".$j->width."' src='".proxy_url($j->url)."'>";
177 if (!Config::get("system","no_oembed_rich_content")) {
178 $ret.= proxy_parse_html($jhtml);
183 // add link to source if not present in "rich" type
184 if ($j->type!='rich' || !strpos($j->html,$embedurl) ){
186 if (isset($j->title)) {
187 if (isset($j->provider_name)) {
188 $ret .= $j->provider_name.": ";
191 $embedlink = (isset($j->title))?$j->title:$embedurl;
192 $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
193 if (isset($j->author_name)) {
194 $ret.=" (".$j->author_name.")";
196 } elseif (isset($j->provider_name) || isset($j->author_name)) {
198 if (isset($j->provider_name)) {
199 $embedlink .= $j->provider_name;
202 if (isset($j->author_name)) {
203 if ($embedlink != "") {
207 $embedlink .= $j->author_name;
209 if (trim($embedlink) == "") {
210 $embedlink = $embedurl;
213 $ret .= "<a href='$embedurl' rel='oembed'>$embedlink</a>";
215 //if (isset($j->author_name)) $ret.=" by ".$j->author_name;
216 //if (isset($j->provider_name)) $ret.=" on ".$j->provider_name;
219 // add <a> for html2bbcode conversion
220 $ret .= "<a href='$embedurl' rel='oembed'>$embedurl</a>";
223 $ret = str_replace("\n","",$ret);
224 return mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
228 * @brief Generates the iframe HTML for an oembed attachment.
230 * Width and height are given by the remote, and are regularly too small for
231 * the generated iframe.
233 * The width is entirely discarded for the actual width of the post, while fixed
234 * height is used as a starting point before the inevitable resizing.
236 * Since the iframe is automatically resized on load, there are no need for ugly
237 * and impractical scrollbars.
239 * @param string $src Original remote URL to embed
240 * @param string $width
241 * @param string $height
242 * @return string formatted HTML
244 * @see oembed_format_object()
246 function oembed_iframe($src, $width, $height) {
249 if (!$height || strstr($height,'%')) {
254 $s = System::baseUrl() . '/oembed/' . base64url_encode($src);
255 return '<iframe onload="resizeIframe(this);" class="embed_rich" height="' . $height . '" width="' . $width . '" src="' . $s . '" allowfullscreen scrolling="no" frameborder="no">' . t('Embedded content') . '</iframe>';
260 function oembed_bbcode2html($text){
261 $stopoembed = Config::get("system","no_oembed");
262 if ($stopoembed == true){
263 return preg_replace("/\[embed\](.+?)\[\/embed\]/is", "<!-- oembed $1 --><i>". t('Embedding disabled') ." : $1</i><!-- /oembed $1 -->" ,$text);
265 return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", 'oembed_replacecb' ,$text);
269 function oe_build_xpath($attr, $value){
270 // http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
271 return "contains( normalize-space( @$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 = '$value'";
274 function oe_get_inner_html($node) {
276 $children = $node->childNodes;
277 foreach ($children as $child) {
278 $innerHTML .= $child->ownerDocument->saveXML($child);
284 * Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
285 * and replace it with [embed]url[/embed]
287 function oembed_html2bbcode($text) {
288 // start parser only if 'oembed' is in text
289 if (strpos($text, "oembed")) {
291 // convert non ascii chars to html entities
292 $html_text = mb_convert_encoding($text, 'HTML-ENTITIES', mb_detect_encoding($text));
294 // If it doesn't parse at all, just return the text.
295 $dom = @DOMDocument::loadHTML($html_text);
299 $xpath = new DOMXPath($dom);
302 $xattr = oe_build_xpath("class","oembed");
303 $entries = $xpath->query("//span[$xattr]");
305 $xattr = "@rel='oembed'";//oe_build_xpath("rel","oembed");
306 foreach ($entries as $e) {
307 $href = $xpath->evaluate("a[$xattr]/@href", $e)->item(0)->nodeValue;
308 if (!is_null($href)) {
309 $e->parentNode->replaceChild(new DOMText("[embed]".$href."[/embed]"), $e);
312 return oe_get_inner_html( $dom->getElementsByTagName("body")->item(0) );