Subversion Repositories Applications.framework

<?php
// declare(encoding='UTF-8');
/**
* Classe client permettant d'interroger des services web REST.
*
* @category             php 5.2
* @package              Framework
* @author               Jean-Pascal MILCENT <jpm@tela-botanica.org>
* @copyright    Copyright (c) 2010, Tela Botanica (accueil@tela-botanica.org)
* @license              http://www.cecill.info/licences/Licence_CeCILL_V2-fr.txt Licence CECILL
* @license              http://www.gnu.org/licenses/gpl.html Licence GNU-GPL
* @since                0.2
*/
class RestClient {
        const HTTP_URL_REQUETE_SEPARATEUR = '&';
        const HTTP_URL_REQUETE_CLE_VALEUR_SEPARATEUR = '=';
        private $http_methodes = array('GET', 'POST', 'PUT', 'DELETE', 'HEAD', 'OPTIONS', 'CONNECT', 'TRACE');
        protected $parametres = array();
        private $url = null;
        private $reponse_entetes = null;

        //+----------------------------------------------------------------------------------------------------------------+
        // ACCESSEURS

        public function getReponseEntetes() {
                return $this->reponse_entetes;
        }

        public function getParametre($cle) {
                $valeur = (isset($this->parametres[$cle])) ? $this->parametres[$cle] : null;
                return $valeur;
        }

        public function ajouterParametre($cle, $valeur) {
                $this->parametres[$cle] = $valeur;
        }

        public function supprimerParametre($cle) {
                unset($this->parametres[$cle]);
        }

        public function nettoyerParametres() {
                $this->parametres = array();
        }

        //+----------------------------------------------------------------------------------------------------------------+
        // MÉTHODES

        public function consulter($url) {
                $retour = $this->envoyerRequete($url, 'GET');
                return $retour;
        }

        public function ajouter($url, Array $donnees) {
                $retour = $this->envoyerRequete($url, 'PUT', $donnees);
                return $retour;
        }

        public function modifier($url, Array $donnees) {
                $retour = $this->envoyerRequete($url, 'POST', $donnees);
                return $retour;
        }

        public function supprimer($url) {
                $retour = $this->envoyerRequete($url, 'DELETE');
                return $retour;
        }

        public function envoyerRequete($url, $mode, Array $donnees = array()) {
                $this->url = $url;
                $contenu = false;
                if (! in_array($mode, $this->http_methodes)) {
                        $e = "Le mode de requête '$mode' n'est pas accepté!";
                        trigger_error($e, E_USER_WARNING);
                } else {
                        if ($mode == 'GET') {
                                $this->traiterUrlParametres();
                        }
                        $content = http_build_query($donnees, null, self::HTTP_URL_REQUETE_SEPARATEUR);
                        $contexte = stream_context_create(array(
                                'http' => array(
                                'method' => $mode,
                                        'header' => "Content-type: application/x-www-form-urlencoded\r\n",
                                'content' => $content)));
                        $flux = @fopen($this->url, 'r', false, $contexte);
                        if (!$flux) {
                                $this->reponse_entetes = $http_response_header;
                                $entetesFmt = print_r($this->analyserEntete(), true);
                                $e = "L'ouverture de l'url '{$this->url}' par la méthode HTTP '$mode' a échoué!\n".
                                        "Le contenu des métadonnées était : $entetesFmt \n".
                                        "Les paramètres de la requête HTTP étaient : $content \n".
                                        "Le contenu était : ".stream_get_contents($flux);
                                trigger_error($e, E_USER_WARNING);
                        } else {
                                // Informations sur les en-têtes et métadonnées du flux
                                $this->reponse_entetes = stream_get_meta_data($flux);

                                // Contenu actuel de $url
                                $contenu = stream_get_contents($flux);

                                fclose($flux);
                        }
                        $this->traiterEntete();
                }
                $this->reinitialiser();
                return $contenu;
        }

        private function traiterUrlParametres() {
                $parametres = array();
                if (count($this->parametres) > 0) {
                        foreach ($this->parametres as $cle => $valeur) {
                                $cle = rawurlencode($cle);
                                $valeur = rawurlencode($valeur);
                                $parametres[] = $cle.self::HTTP_URL_REQUETE_CLE_VALEUR_SEPARATEUR.$valeur;
                        }
                        $url_parametres = implode(self::HTTP_URL_REQUETE_SEPARATEUR, $parametres);
                        $this->url = $this->url.'?'.$url_parametres;
                }
        }

        private function traiterEntete() {
                $infos = $this->analyserEntete();
                $this->traiterEnteteDebogage($infos);
        }

        private function analyserEntete() {
                $entetes = $this->reponse_entetes;
                $infos = array('date' => null, 'uri' => $this->url, 'debogages' => null);

                if (isset($entetes['wrapper_data'])) {
                        $entetes = $entetes['wrapper_data'];
                }
                foreach ($entetes as $entete) {
                        if (preg_match('/^X_REST_DEBOGAGE_MESSAGES: (.+)$/', $entete, $match)) {
                                $infos['debogages'] = json_decode($match[1]);
                        }
                        if (preg_match('/^Date: .+ ([012][0-9]:[012345][0-9]:[012345][0-9]) .*$/', $entete, $match)) {
                                $infos['date'] = $match[1];
                        }
                }
                return $infos;
        }

        private function traiterEnteteDebogage($entetes_analyses) {
                if (isset($entetes['debogages'])) {
                        $date = $entetes['date'];
                        $uri = $entetes['uri'];
                        $debogages = $entetes['debogages'];
                        foreach ($debogages as $debogage) {
                                $e = "DEBOGAGE : $date - $uri :\n$debogage";
                                trigger_error($e, E_USER_NOTICE);
                        }
                }
        }

        private function reinitialiser() {
                $this->nettoyerParametres();
        }
}