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();

	}

}