X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;ds=sidebyside;f=src%2FContent%2FOEmbed.php;h=116120ab552474c4dfe3e8132ea995bb76716293;hb=41123162f14fa83cd566e24da8faafa04b40140f;hp=30493e1b8b4a8e893e6a607cc27cac2796f6f5fa;hpb=d416243964032d914174e4ae5e1c491b2efaafc7;p=friendica.git diff --git a/src/Content/OEmbed.php b/src/Content/OEmbed.php index 30493e1b8b..116120ab55 100644 --- a/src/Content/OEmbed.php +++ b/src/Content/OEmbed.php @@ -1,379 +1,413 @@ - - */ -class OEmbed -{ - public static function replaceCallback($matches) - { - $embedurl = $matches[1]; - $j = self::fetchURL($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 $no_rich_type If set to true rich type content won't be fetched. - * - * @return bool|object Returns object with embed content or false if no embedable - * content exists - */ - public static function fetchURL($embedurl, $no_rich_type = false) - { - $embedurl = trim($embedurl, "'"); - $embedurl = trim($embedurl, '"'); - - $a = get_app(); - - $condition = array('url' => normalise_link($embedurl)); - $r = dba::select('oembed', array('content'), $condition, array('limit' => 1)); - - if (DBM::is_result($r)) { - $txt = $r["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 ($j->type != "error") { - dba::insert('oembed', array('url' => normalise_link($embedurl), - '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 $j; - } - - public static function formatObject($j) - { - $embedurl = $j->embedurl; - $jhtml = self::iframe($j->embedurl, (isset($j->width) ? $j->width : null), (isset($j->height) ? $j->height : null)); - $ret = "
"; - $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", "" . t('Embedding disabled') . " : $1", $text); - } - return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", ['self', 'replaceCallback'], $text); - } - - /** - * Find - * and replace it with [embed]url[/embed] - */ - public static function HTML2BBCode($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 = $xpath->query("//span[$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]"), $e); - } - } - return self::getInnerHTML($dom->getElementsByTagName("body")->item(0)); - } else { - return $text; - } - } - - /** - * @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 $height - * @return string formatted HTML - * - * @see oembed_format_object() - */ - private static function iframe($src, $width, $height) - { - $a = get_app(); - - if (!$height || strstr($height, '%')) { - $height = '200'; - } - $width = '100%'; - - // Only proxy OEmbed URLs to avoid mixed-content errors - if (Config::get('system', 'ssl_policy') == SSL_POLICY_FULL && parse_url($src, PHP_URL_SCHEME) !== 'https') { - $src = System::baseUrl() . '/oembed/' . base64url_encode($src); - } - return ''; - } - - /** - * 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; - } - - /** - * 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 $url - * @return boolean - */ - private static function isAllowedURL($url) - { - if (!Config::get('system', 'no_oembed_rich_content')) { - return true; - } - - $domain = parse_url($url, PHP_URL_HOST); - - $str_allowed = Config::get('system', 'allowed_oembed', ''); - $allowed = explode(',', $str_allowed); - - return allowed_domain($domain, $allowed, true); - } -} + + */ +class OEmbed +{ + public static function replaceCallback($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 $no_rich_type If set to true rich type content won't be fetched. + * + * @return \Friendica\Object\OEmbed + */ + public static function fetchURL($embedurl, $no_rich_type = false) + { + $embedurl = trim($embedurl, '\'"'); + + $a = get_app(); + + $cache_key = 'oembed:' . $a->videowidth . ':' . $embedurl; + + $condition = ['url' => normalise_link($embedurl), 'maxwidth' => $a->videowidth]; + $oembed_record = DBA::selectFirst('oembed', ['content'], $condition); + if (DBA::isResult($oembed_record)) { + $json_string = $oembed_record['content']; + } else { + $json_string = Cache::get($cache_key); + } + + // These media files should now be caught in bbcode.php + // left here as a fallback in case this is called from another source + $noexts = ['mp3', 'mp4', 'ogg', 'ogv', 'oga', 'ogm', 'webm']; + $ext = pathinfo(strtolower($embedurl), PATHINFO_EXTENSION); + + $oembed = new \Friendica\Object\OEmbed($embedurl); + + if ($json_string) { + $oembed->parseJSON($json_string); + } else { + $json_string = ''; + + if (!in_array($ext, $noexts)) { + // try oembed autodiscovery + $redirects = 0; + $html_text = Network::fetchUrl($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; + $json_string = Network::fetchUrl($href . '&maxwidth=' . $a->videowidth); + break; + } + + $entries = $xpath->query("//link[@type='text/json+oembed']"); + foreach ($entries as $e) { + $href = $e->getAttributeNode('href')->nodeValue; + $json_string = Network::fetchUrl($href . '&maxwidth=' . $a->videowidth); + break; + } + } + } + } + + $json_string = trim($json_string); + + if (!$json_string || $json_string[0] != '{') { + $json_string = '{"type":"error"}'; + } + + $oembed->parseJSON($json_string); + + if (!empty($oembed->type) && $oembed->type != 'error') { + DBA::insert('oembed', [ + 'url' => normalise_link($embedurl), + 'maxwidth' => $a->videowidth, + 'content' => $json_string, + 'created' => DateTimeFormat::utcNow() + ], true); + $cache_ttl = CACHE_DAY; + } else { + $cache_ttl = CACHE_FIVE_MINUTES; + } + + Cache::set($cache_key, $json_string, $cache_ttl); + } + + if ($oembed->type == 'error') { + return $oembed; + } + + // Always embed the SSL version + $oembed->html = str_replace(['http://www.youtube.com/', 'http://player.vimeo.com/'], ['https://www.youtube.com/', 'https://player.vimeo.com/'], $oembed->html); + + // If fetching information doesn't work, then improve via internal functions + if ($no_rich_type && ($oembed->type == 'rich')) { + $data = ParseUrl::getSiteinfoCached($embedurl, true, false); + $oembed->type = $data['type']; + + if ($oembed->type == 'photo') { + $oembed->url = $data['url']; + } + + if (isset($data['title'])) { + $oembed->title = $data['title']; + } + + if (isset($data['text'])) { + $oembed->description = $data['text']; + } + + if (!empty($data['images'])) { + $oembed->thumbnail_url = $data['images'][0]['src']; + $oembed->thumbnail_width = $data['images'][0]['width']; + $oembed->thumbnail_height = $data['images'][0]['height']; + } + } + + Addon::callHooks('oembed_fetch_url', $embedurl, $oembed); + + return $oembed; + } + + private static function formatObject(\Friendica\Object\OEmbed $oembed) + { + $ret = ' '; + + $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", "" . L10n::t('Embedding disabled') . " : $1", $text); + } + return preg_replace_callback("/\[embed\](.+?)\[\/embed\]/is", ['self', 'replaceCallback'], $text); + } + + /** + * Find + * and replace it with [embed]url[/embed] + */ + public static function HTML2BBCode($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(',', $str_allowed); + + return Network::isDomainAllowed($domain, $allowed); + } + + public static function getHTML($url, $title = null) + { + // Always embed the SSL version + $url = str_replace(["http://www.youtube.com/", "http://player.vimeo.com/"], + ["https://www.youtube.com/", "https://player.vimeo.com/"], $url); + + $o = self::fetchURL($url, !self::isAllowedURL($url)); + + if (!is_object($o) || property_exists($o, 'type') && $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 ''; + } + + /** + * 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; + } + +}