333 lines
13 KiB
PHP
333 lines
13 KiB
PHP
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<?php
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/**
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* Plugin oEmbed
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* Licence GPL3
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*
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*/
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if (!defined('_ECRIRE_INC_VERSION')){
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return;
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}
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/**
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* Lister les providers connus
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* @return array
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*/
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function oembed_lister_providers(){
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// liste des providers par defaut
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// voir
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// http://oembed.com/
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// http://code.google.com/p/oohembed/source/browse/app/provider/endpoints.json
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// https://github.com/starfishmod/jquery-oembed-all/blob/master/jquery.oembed.js
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// https://github.com/panzi/oembedendpoints/blob/master/endpoints-simple.json
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// voir aussi http://embed.ly/providers qui donne les scheme mais pas les endpoint
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$providers = array(
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'http://*.youtube.com/watch*' => 'https://www.youtube.com/oembed',
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'http://*.youtube.com/playlist*' => 'https://www.youtube.com/oembed',
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'http://youtu.be/*' => 'https://www.youtube.com/oembed',
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'http://*.vimeo.com/*' => 'https://vimeo.com/api/oembed.json',
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'http://vimeo.com/*' => 'https://vimeo.com/api/oembed.json',
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'http://*.dailymotion.com/*' => 'https://www.dailymotion.com/services/oembed',
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'http://dai.ly/*' => 'https://www.dailymotion.com/services/oembed',
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'http://*.flickr.com/*' => 'https://www.flickr.com/services/oembed/',
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'http://flickr.com/*' => 'https://www.flickr.com/services/oembed/',
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'http://flic.kr/*' => 'https://www.flickr.com/services/oembed/',
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'http://soundcloud.com/*' => 'https://soundcloud.com/oembed',
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'http://mixcloud.com/*' => 'https://mixcloud.com/oembed',
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'http://*.soundcloud.com/*' => 'https://soundcloud.com/oembed',
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'http://*.mixcloud.com/*' => 'https://mixcloud.com/oembed',
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'http://*.slideshare.net/*/*' => 'https://www.slideshare.net/api/oembed/2',
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'http://www.slideshare.net/*/*' => 'https://www.slideshare.net/api/oembed/2',
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'http://huffduffer.com/*/*' => 'http://huffduffer.com/oembed',
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'http://nfb.ca/film/*' => 'http://www.nfb.ca/remote/services/oembed/',
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'http://dotsub.com/view/*' => 'http://dotsub.com/services/oembed',
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'http://clikthrough.com/theater/video/*' => 'http://clikthrough.com/services/oembed',
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'http://kinomap.com/*' => 'http://www.kinomap.com/oembed',
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'http://photobucket.com/albums/*' => 'http://api.photobucket.com/oembed',
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'http://photobucket.com/groups/*' => 'http://api.photobucket.com/oembed',
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'http://*.smugmug.com/*' => 'https://api.smugmug.com/services/oembed/',
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'http://meetup.com/*' => 'https://api.meetup.com/oembed',
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'http://meetup.ps/*' => 'http://api.meetup.com/oembed',
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'http://*.wordpress.com/*' => 'https://public-api.wordpress.com/oembed/1.0/',
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'http://twitter.com/*/status/*' => 'https://publish.twitter.com/oembed',
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'http://twitter.com/*/likes' => 'https://publish.twitter.com/oembed',
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'http://twitter.com/*/lists/*' => 'https://publish.twitter.com/oembed',
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'http://twitter.com/*/timelines/*' => 'https://publish.twitter.com/oembed',
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'http://twitter.com/i/moments/*' => 'https://publish.twitter.com/oembed',
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'http://techcrunch.com/*' => 'http://public-api.wordpress.com/oembed/1.0/',
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'http://wp.me/*' => 'http://public-api.wordpress.com/oembed/1.0/',
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'http://my.opera.com/*' => 'http://my.opera.com/service/oembed',
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'http://www.collegehumor.com/video/*' => 'http://www.collegehumor.com/oembed.json',
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'http://imgur.com/*' => 'http://api.imgur.com/oembed',
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'http://*.imgur.com/*' => 'http://api.imgur.com/oembed',
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'http://*.onf.ca/*' => 'http://www.onf.ca/remote/services/oembed/',
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'http://vine.co/v/*' => 'https://vine.co/oembed.json',
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'http://*.tumblr.com/post/*' => 'https://www.tumblr.com/oembed/1.0',
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'http://*.kickstarter.com/projects/*' => 'https://www.kickstarter.com/services/oembed',
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'http://speakerdeck.com/*' => 'https://speakerdeck.com/oembed.json',
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'http://issuu.com/*/docs/*' => 'https://issuu.com/oembed',
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'http://*.calameo.com/books/*' => 'https://www.calameo.com/services/oembed',
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'http://*.calameo.com/read/*' => 'https://www.calameo.com/services/oembed',
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'http://*.arte.tv/*/videos/*' => 'https://api.arte.tv/api/player/v1/oembed/',
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'http://egliseinfo.catholique.fr/*' => 'http://egliseinfo.catholique.fr/api/oembed',
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#'https://gist.github.com/*' => 'http://github.com/api/oembed?format=json'
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);
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// pipeline pour permettre aux plugins d'ajouter/supprimer/modifier des providers
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$providers = pipeline('oembed_lister_providers', $providers);
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// merger avec la globale pour perso mes_options dans un site
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// pour supprimer un scheme il suffit de le renseigner avec un endpoint vide
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if (isset($GLOBALS['oembed_providers'])){
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$providers = array_merge($providers, $GLOBALS['oembed_providers']);
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// retirer les providers avec un endpoint vide
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$providers = array_filter($providers);
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}
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return $providers;
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}
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// Merci WordPress :)
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// http://core.trac.wordpress.org/browser/trunk/wp-includes/class-oembed.php
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/**
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* Récupérer les données oembed d'une url
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*
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* @param string $url url de la page qui contient le document à récupérer avec oembed
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* @param int $maxwidth largeur max du document
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* null : la valeur configuree par defaut ou pour le provider est utilisee
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* '' : pas de valeur max
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* @param int $maxheight hauteur max du document
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* null : la valeur configuree par defaut ou pour le provider est utilisee
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* '' : pas de valeur max
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* @param string $format format à utiliser pour la requete oembed (json ou xml)
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* @param string $detecter_lien tenter la détection automatique de lien oembed dans la page indiquée
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* @param bool $force_reload forcer le rechargement de l'oembed depuis la source sans utiliser le cache local
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* @return bool|array false si aucun retour ou erreur ; tableau des éléménents de la réponse oembed
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*/
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function oembed_recuperer_data($url, $maxwidth = null, $maxheight = null, $format = 'json', $detecter_lien = 'non', $force_reload = false){
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static $cache = array();
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$provider = false;
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include_spip('inc/config');
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$provider = oembed_verifier_provider($url);
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if ((!$provider)
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and (($detecter_lien!='non')
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or lire_config('oembed/detecter_lien', 'non')=='oui')){
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$provider = oembed_detecter_lien($url);
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}
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if (!$provider){
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return false;
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}
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$data_url = url_absolue($provider['endpoint'], url_de_base());
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// certains oembed fournissent un endpoint qui contient deja l'URL, parfois differente de celle de la page
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if (!parametre_url($data_url, 'url')){
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$data_url = parametre_url($data_url, 'url', $url, '&');
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}
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if (!$maxwidth){
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$maxwidth = lire_config('oembed/maxwidth', '600');
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}
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if (!$maxheight){
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$maxheight = lire_config('oembed/maxheight', '400');
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}
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$data_url = parametre_url($data_url, 'maxwidth', $maxwidth, '&');
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$data_url = parametre_url($data_url, 'maxheight', $maxheight, '&');
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$data_url = parametre_url($data_url, 'format', $format, '&');
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if (isset($provider['provider_name']) and $provider['provider_name']){
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$provider_name = $provider['provider_name'];
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} else {
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// pre-traitement du provider si besoin
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$provider_name = explode('//', $provider['endpoint']);
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$provider_name = explode('/', $provider_name[1]);
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$provider_name = reset($provider_name);
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}
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$provider_name = preg_replace(',\W+,', '_', strtolower($provider_name));
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if ($oembed_endpoint_pretraite = charger_fonction("pretraite_$provider_name", 'oembed/input', true)){
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$a = func_get_args();
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$args = array('url' => array_shift($a));
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if (count($a)){
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$args['maxwidth'] = array_shift($a);
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}
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if (count($a)){
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$args['maxheight'] = array_shift($a);
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}
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if (count($a)){
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$args['format'] = array_shift($a);
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}
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$args['endpoint'] = $provider['endpoint'];
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$data_url = $oembed_endpoint_pretraite($data_url, $args);
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}
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if (isset($cache[$data_url])){
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return $cache[$data_url];
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}
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$oembed_cache = sous_repertoire(_DIR_CACHE, 'oembed') . md5($data_url) . '.' . $format;
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// si cache oembed dispo et pas de recalcul demande, l'utiliser (perf issue)
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if (!$force_reload and file_exists($oembed_cache) and _VAR_MODE!=='recalcul'){
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lire_fichier($oembed_cache, $cache[$data_url]);
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$cache[$data_url] = unserialize($cache[$data_url]);
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return $cache[$data_url];
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}
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$oembed_recuperer_url = charger_fonction('oembed_recuperer_url', 'inc');
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$cache[$data_url] = $oembed_recuperer_url($data_url, $url, $format);
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// si une fonction de post-traitement est fourni pour ce provider+type, l'utiliser
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if ($cache[$data_url]){
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if (isset($cache[$data_url]['provider_name']) and $cache[$data_url]['provider_name']){
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$provider_name2 = str_replace(' ', '_', strtolower($cache[$data_url]['provider_name']));
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} else {
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$provider_name2 = '';
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}
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$type = strtolower($cache[$data_url]['type']);
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// securisons le nom de la fonction (provider peut contenir n'importe quoi)
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$f1 = preg_replace(',\W,', '', "posttraite_{$provider_name2}_$type");
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$f2 = preg_replace(',\W,', '', "posttraite_{$provider_name2}");
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$f3 = preg_replace(',\W,', '', "posttraite_{$provider_name}_$type");
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$f4 = preg_replace(',\W,', '', "posttraite_{$provider_name}");
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if (
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$oembed_provider_posttraite = charger_fonction($f1, 'oembed/input', true)
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or $oembed_provider_posttraite = charger_fonction($f2, 'oembed/input', true)
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or $oembed_provider_posttraite = charger_fonction($f3, 'oembed/input', true)
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or $oembed_provider_posttraite = charger_fonction($f4, 'oembed/input', true)){
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$cache[$data_url] = $oembed_provider_posttraite($cache[$data_url], $url);
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}
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ecrire_fichier($oembed_cache, serialize($cache[$data_url]));
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}
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spip_log('infos oembed pour ' . $url . ' : ' . var_export($cache[$data_url], true), 'oembed.' . _LOG_DEBUG);
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return $cache[$data_url];
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}
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/**
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* Vérfier qu'une url est dans la liste des providers autorisés
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*
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* @param string $url l'url à tester
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* @return bool|array
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* false si non ; details du provider dans un tabeau associatif si oui
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*/
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function oembed_verifier_provider($url){
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if (strncmp($url, $GLOBALS['meta']['adresse_site'], strlen($GLOBALS['meta']['adresse_site']))==0){
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return false;
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}
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$providers = oembed_lister_providers();
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foreach ($providers as $scheme => $endpoint){
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$regex = '#' . str_replace('\*', '(.+)', preg_quote($scheme, '#')) . '#';
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$regex = preg_replace('|^#http\\\://|', '#https?\://', $regex);
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if (preg_match($regex, $url)){
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return array('endpoint' => $endpoint);
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}
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}
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return false;
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}
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/**
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* Détecter les liens oembed dans le head d'une page web
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*
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* @param string $url url de la page à analyser
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* @return bool|string false si pas de lien ; url du contenu oembed
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*/
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function oembed_detecter_lien($url){
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$providers = array();
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$oembed_recuperer_url = charger_fonction('oembed_recuperer_url', 'inc');
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// on recupere le contenu de la page
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if ($html = $oembed_recuperer_url($url, $url, 'html')){
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// types de liens oembed à détecter
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$linktypes = array(
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'application/json+oembed' => 'json',
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'text/json+oembed' => 'json', // ex de 500px
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'text/xml+oembed' => 'xml',
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'application/xml+oembed' => 'xml', // uniquement pour Vimeo
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);
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// on ne garde que le head de la page
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$head = substr($html, 0, stripos($html, '</head>'));
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// un test rapide...
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$tagfound = false;
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foreach ($linktypes as $linktype => $format){
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if (stripos($head, $linktype)){
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$tagfound = true;
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break;
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}
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}
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if ($tagfound && preg_match_all('/<link([^<>]+)>/i', $head, $links)){
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if (!function_exists('extraire_attribut')){
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include_spip('inc/filtres');
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}
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foreach ($links[0] as $link){
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$type = extraire_attribut($link, 'type');
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$href = extraire_attribut($link, 'href');
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if (!empty($type) and !empty($linktypes[$type]) and !empty($href)){
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$providers[$linktypes[$type]] = $href;
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// on a le json, ça nous suffit
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if ('json'==$linktypes[$type]){
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break;
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}
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}
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}
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}
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}
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$res = array();
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// on préfère le json au xml
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if (!empty($providers['json'])){
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$res['endpoint'] = $providers['json'];
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} elseif (!empty($providers['xml'])) {
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$res['endpoint'] = $providers['xml'];
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} else {
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return false;
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}
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// detecter certains providers specifiques : ex mastodon, chaque instance a son nom et on peut pas l'identifier par son URL
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if (strpos($html, '//github.com/tootsuite/mastodon')!==false or strpos($html, '//joinmastodon.org')!==false){
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$res['provider_name'] = 'Mastodon';
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}
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return $res;
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}
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/**
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* Embarquer un lien oembed si possible
|
||
|
|
* @param string $lien
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
function oembed_embarquer_lien($lien){
|
||
|
|
static $base = null;
|
||
|
|
|
||
|
|
$url = extraire_attribut($lien, 'href');
|
||
|
|
$texte = null;
|
||
|
|
if ($url
|
||
|
|
and (
|
||
|
|
oembed_verifier_provider($url)
|
||
|
|
or (lire_config('oembed/detecter_lien', 'non')=='oui'))
|
||
|
|
){
|
||
|
|
if (is_null($base)){
|
||
|
|
$base = url_de_base();
|
||
|
|
}
|
||
|
|
// on embarque jamais un lien de soi meme car c'est une mise en abime qui donne le tourni
|
||
|
|
// (et peut provoquer une boucle infinie de requetes http)
|
||
|
|
if (strncmp($url, $base, strlen($base))!=0){
|
||
|
|
$fond = recuperer_fond('modeles/oembed', array('url' => $url, 'lien' => $lien));
|
||
|
|
if ($fond = trim($fond)){
|
||
|
|
$texte = $fond;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $texte;
|
||
|
|
}
|