mirror of
https://github.com/friendica/friendica
synced 2024-12-26 12:00:19 +00:00
408 lines
11 KiB
PHP
408 lines
11 KiB
PHP
<?php
|
|
|
|
/**
|
|
* @file src/Content/OEmbed.php
|
|
*/
|
|
|
|
namespace Friendica\Content;
|
|
|
|
use Friendica\Core\Cache;
|
|
use Friendica\Core\System;
|
|
use Friendica\Core\Config;
|
|
use Friendica\Database\DBM;
|
|
use Friendica\Util\ParseUrl;
|
|
use dba;
|
|
use DOMDocument;
|
|
use DOMXPath;
|
|
use DOMNode;
|
|
use Exception;
|
|
|
|
require_once 'include/dba.php';
|
|
require_once 'mod/proxy.php';
|
|
|
|
/**
|
|
* Handles all OEmbed content fetching and replacement
|
|
*
|
|
* OEmbed is a standard used to allow an embedded representation of a URL on
|
|
* third party sites
|
|
*
|
|
* @see https://oembed.com
|
|
*
|
|
* @author Hypolite Petovan <mrpetovan@gmail.com>
|
|
*/
|
|
class OEmbed
|
|
{
|
|
public static function replaceCallback($matches)
|
|
{
|
|
$embedurl = $matches[1];
|
|
$j = self::fetchURL($embedurl, !self::isAllowedURL($embedurl));
|
|
$s = self::formatObject($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 $no_rich_type If set to true rich type content won't be fetched.
|
|
*
|
|
* @return bool|object Returns object with embed content or false if no embeddable
|
|
* content exists
|
|
*/
|
|
public static function fetchURL($embedurl, $no_rich_type = false)
|
|
{
|
|
$embedurl = trim($embedurl, "'");
|
|
$embedurl = trim($embedurl, '"');
|
|
|
|
$a = get_app();
|
|
|
|
$condition = ['url' => normalise_link($embedurl), 'maxwidth' => $a->videowidth];
|
|
$oembed = dba::selectFirst('oembed', ['content'], $condition);
|
|
if (DBM::is_result($oembed)) {
|
|
$txt = $oembed["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);
|
|
$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 || $txt[0] != "{") {
|
|
$txt = '{"type":"error"}';
|
|
} else { //save in cache
|
|
$j = json_decode($txt);
|
|
if ($j->type != "error") {
|
|
dba::insert('oembed', [
|
|
'url' => normalise_link($embedurl),
|
|
'maxwidth' => $a->videowidth,
|
|
'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 $j;
|
|
}
|
|
|
|
private static function formatObject($j)
|
|
{
|
|
$embedurl = $j->embedurl;
|
|
$jhtml = $j->html;
|
|
$ret = '<div 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;
|
|
}
|
|
break;
|
|
case "photo":
|
|
$ret .= '<img width="' . $j->width . '" src="' . proxy_url($j->url) . '">';
|
|
break;
|
|
case "link":
|
|
break;
|
|
case "rich":
|
|
$ret .= proxy_parse_html($jhtml);
|
|
break;
|
|
}
|
|
|
|
// add link to source if not present in "rich" type
|
|
if ($j->type != 'rich' || !strpos($j->html, $embedurl)) {
|
|
$ret .= '<h4>';
|
|
if (!empty($j->title)) {
|
|
if (!empty($j->provider_name)) {
|
|
$ret .= $j->provider_name . ": ";
|
|
}
|
|
|
|
$ret .= '<a href="' . $embedurl . '" rel="oembed">' . $j->title . '</a>';
|
|
if (!empty($j->author_name)) {
|
|
$ret .= ' (' . $j->author_name . ')';
|
|
}
|
|
} elseif (!empty($j->provider_name) || !empty($j->author_name)) {
|
|
$embedlink = "";
|
|
if (!empty($j->provider_name)) {
|
|
$embedlink .= $j->provider_name;
|
|
}
|
|
|
|
if (!empty($j->author_name)) {
|
|
if ($embedlink != "") {
|
|
$embedlink .= ": ";
|
|
}
|
|
|
|
$embedlink .= $j->author_name;
|
|
}
|
|
if (trim($embedlink) == "") {
|
|
$embedlink = $embedurl;
|
|
}
|
|
|
|
$ret .= '<a href="' . $embedurl . '" rel="oembed">' . $embedlink . '</a>';
|
|
} else {
|
|
$ret .= '<a href="' . $embedurl . '" rel="oembed">' . $embedurl . '</a>';
|
|
}
|
|
$ret .= "</h4>";
|
|
} elseif (!strpos($j->html, $embedurl)) {
|
|
// add <a> for html2bbcode conversion
|
|
$ret .= '<a href="' . $embedurl . '" rel="oembed">' . $j->title . '</a>';
|
|
}
|
|
|
|
$ret .= '</div>';
|
|
|
|
$ret = str_replace("\n", "", $ret);
|
|
return mb_convert_encoding($ret, 'HTML-ENTITIES', mb_detect_encoding($ret));
|
|
}
|
|
|
|
public static function BBCode2HTML($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", ['self', 'replaceCallback'], $text);
|
|
}
|
|
|
|
/**
|
|
* Find <span class='oembed'>..<a href='url' rel='oembed'>..</a></span>
|
|
* and replace it with [embed]url[/embed]
|
|
*/
|
|
public static function HTML2BBCode($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);
|
|
|
|
$xattr = self::buildXPath("class", "oembed");
|
|
$entries = $xpath->query("//div[$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]"), $e);
|
|
}
|
|
}
|
|
return self::getInnerHTML($dom->getElementsByTagName("body")->item(0));
|
|
} else {
|
|
return $text;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Determines if rich content OEmbed is allowed for the provided URL
|
|
*
|
|
* @brief Determines if rich content OEmbed is allowed for the provided URL
|
|
* @param string $url
|
|
* @return boolean
|
|
*/
|
|
public static function isAllowedURL($url)
|
|
{
|
|
if (!Config::get('system', 'no_oembed_rich_content')) {
|
|
return true;
|
|
}
|
|
|
|
$domain = parse_url($url, PHP_URL_HOST);
|
|
if (!x($domain)) {
|
|
return false;
|
|
}
|
|
|
|
$str_allowed = Config::get('system', 'allowed_oembed', '');
|
|
if (!x($str_allowed)) {
|
|
return false;
|
|
}
|
|
|
|
$allowed = explode(',', $str_allowed);
|
|
|
|
return allowed_domain($domain, $allowed);
|
|
}
|
|
|
|
public static function getHTML($url, $title = null)
|
|
{
|
|
// Always embed the SSL version
|
|
$url = str_replace(array("http://www.youtube.com/", "http://player.vimeo.com/"),
|
|
array("https://www.youtube.com/", "https://player.vimeo.com/"), $url);
|
|
|
|
$o = self::fetchURL($url, !self::isAllowedURL($url));
|
|
|
|
if (!is_object($o) || $o->type == 'error') {
|
|
throw new Exception('OEmbed failed for URL: ' . $url);
|
|
}
|
|
|
|
if (x($title)) {
|
|
$o->title = $title;
|
|
}
|
|
|
|
$html = self::formatObject($o);
|
|
|
|
return $html;
|
|
}
|
|
|
|
/**
|
|
* @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.
|
|
*
|
|
* @todo This function is currently unused until someone™ adds support for a separate OEmbed domain
|
|
*
|
|
* @param string $src Original remote URL to embed
|
|
* @param string $width
|
|
* @param string $height
|
|
* @return string formatted HTML
|
|
*
|
|
* @see oembed_format_object()
|
|
*/
|
|
private static function iframe($src, $width, $height)
|
|
{
|
|
$a = get_app();
|
|
|
|
if (!$height || strstr($height, '%')) {
|
|
$height = '200';
|
|
}
|
|
$width = '100%';
|
|
|
|
$src = System::baseUrl() . '/oembed/' . base64url_encode($src);
|
|
return '<iframe onload="resizeIframe(this);" class="embed_rich" height="' . $height . '" width="' . $width . '" src="' . $src . '" allowfullscreen scrolling="no" frameborder="no">' . t('Embedded content') . '</iframe>';
|
|
}
|
|
|
|
/**
|
|
* Generates an XPath query to select elements whose provided attribute contains
|
|
* the provided value in a space-separated list.
|
|
*
|
|
* @brief Generates attribute search XPath string
|
|
*
|
|
* @param string $attr Name of the attribute to seach
|
|
* @param string $value Value to search in a space-separated list
|
|
* @return string
|
|
*/
|
|
private static function buildXPath($attr, $value)
|
|
{
|
|
// https://www.westhoffswelt.de/blog/2009/6/9/select-html-elements-with-more-than-one-css-class-using-xpath
|
|
return "contains(normalize-space(@$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'";
|
|
}
|
|
|
|
/**
|
|
* Returns the inner XML string of a provided DOMNode
|
|
*
|
|
* @brief Returns the inner XML string of a provided DOMNode
|
|
*
|
|
* @param DOMNode $node
|
|
* @return string
|
|
*/
|
|
private static function getInnerHTML(DOMNode $node)
|
|
{
|
|
$innerHTML = '';
|
|
$children = $node->childNodes;
|
|
foreach ($children as $child) {
|
|
$innerHTML .= $child->ownerDocument->saveXML($child);
|
|
}
|
|
return $innerHTML;
|
|
}
|
|
|
|
}
|