framework/Think/Oauth/Driver.php

<?php
// +----------------------------------------------------------------------
// | TOPThink [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2013 http://topthink.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id$

namespace Think\Oauth;
abstract class Driver {

    /**
     * oauth版本
     * @var string
     */
    protected $version = '2.0';

    /**
     * 申请应用时分配的app_key
     * @var string
     */
    protected $appKey = '';

    /**
     * 申请应用时分配的 app_secret
     * @var string
     */
    protected $appSecret = '';

    /**
     * 授权类型 response_type 目前只能为code
     * @var string
     */
    protected $responseType = 'code';

    /**
     * grant_type 目前只能为 authorization_code
     * @var string 
     */
    protected $grantType = 'authorization_code';

    /**
     * 获取request_code请求的URL
     * @var string
     */
    protected $getRequestCodeURL = '';

    /**
     * 获取access_token请求的URL
     * @var string
     */
    protected $getAccessTokenURL = '';

    /**
     * API根路径
     * @var string
     */
    protected $apiBase = '';

    /**
     * 授权后获取到的TOKEN信息
     * @var array
     */
    protected $token = null;

    /**
     * 回调页面URL  可以通过配置文件配置
     * @var string
     */
    protected $callback = '';

    /**
     * 构造方法，配置应用信息
     * @param array $config 
     */
    public function __construct($config = []){
        $this->appKey       =   $config['app_key'];
        $this->appSecret    =   $config['app_secret'];
        $this->authorize    =   isset($config['authorize'])?$config['authorize']:'';
        $this->callback     =   isset($config['callback'])?$config['callback']:'';
    }

    // 跳转到授权登录页面
    public function login($callback=''){
        if($callback) {
            $this->callback =   $callback;
        }
        //跳转到授权页面
        header('Location: ' . $this->getRequestCodeURL());
        exit;
    }

    /**
     * 请求code 
     */
    public function getRequestCodeURL(){
        //Oauth 标准参数
        $params = array(
            'client_id'     => $this->appKey,
            'redirect_uri'  => $this->callback,
            'response_type' => $this->responseType,
        );
        
        //获取额外参数
        if($this->authorize){
            parse_str($this->authorize, $_param);
            if(is_array($_param)){
                $params = array_merge($params, $_param);
            } else {
                throw new Exception('AUTHORIZE配置不正确！');
            }
        }
        return $this->getRequestCodeURL . '?' . http_build_query($params);
    }
	
    /**
     * 获取access_token
     * @param string $code 授权登录成功后得到的code信息
     */
    public function getAccessToken($code){
        $params = array(
            'client_id'     =>  $this->appKey,
            'client_secret' =>  $this->appSecret,
            'grant_type'    =>  $this->grantType,
            'redirect_uri'  =>  $this->callback,
            'code'          =>  $code,
        );
        // 获取token信息
        $data = $this->http($this->getAccessTokenURL, $params, 'POST');
        // 解析token
        $this->token = $this->parseToken($data);
        return $this->token;
    }

    /**
     * 设置access_token
     * @param string $token
     */
    public function setToken($token){
        $this->token    =   $token;
    }

    /**
     * 合并默认参数和额外参数
     * @param array $params  默认参数
     * @param array/string $param 额外参数
     * @return array:
     */
    protected function param($params, $param){
        if(is_string($param))
            parse_str($param, $param);
        return array_merge($params, $param);
    }

    /**
     * 获取指定API请求的URL
     * @param  string $api API名称
     * @param  string $fix api后缀
     * @return string      请求的完整URL
     */
    protected function url($api, $fix = ''){
        return $this->apiBase . $api . $fix;
    }

    /**
     * 发送HTTP请求方法，目前只支持CURL发送请求
     * @param  string $url    请求URL
     * @param  array  $params 请求参数
     * @param  string $method 请求方法GET/POST
     * @return array  $data   响应数据
     */
    protected function http($url, $params, $method = 'GET', $header = array()){
        $vars = http_build_query($params);
        $opts = array(
            CURLOPT_TIMEOUT        => 30,
            CURLOPT_RETURNTRANSFER => 1,
            CURLOPT_SSL_VERIFYPEER => false,
            CURLOPT_SSL_VERIFYHOST => false,
            CURLOPT_HTTPHEADER     => $header
        );

        /* 根据请求类型设置特定参数 */
        switch(strtoupper($method)){
            case 'GET':
                $opts[CURLOPT_URL] = $url . '?' . $vars;
                break;
            case 'POST':
                $opts[CURLOPT_URL] = $url;
                $opts[CURLOPT_POST] = 1;
                $opts[CURLOPT_POSTFIELDS] = $vars;
                break;
            default:
                throw new Exception('不支持的请求方式！');
        }
        
        /* 初始化并执行curl请求 */
        $ch = curl_init();
        curl_setopt_array($ch, $opts);
        $data  = curl_exec($ch);
        $error = curl_error($ch);
        curl_close($ch);
        if($error) throw new Exception('请求发生错误：' . $error);
        return  $data;
    }

    /**
     * 抽象方法，在SNSSDK中实现
     * 组装接口调用参数 并调用接口
     */
    abstract protected function call($api, $param = '', $method = 'GET');

    /**
     * 抽象方法，在SNSSDK中实现
     * 解析access_token方法请求后的返回值
     */
    abstract protected function parseToken($result);

    /**
     * 抽象方法，在SNSSDK中实现
     * 获取当前授权用户的SNS标识
     */
    abstract public function getOpenId();	

    /**
     * 抽象方法
     * 获取当前授权用户的用户信息
     */
    abstract public function getOauthInfo();
}