<?php
/**
 * Copyright 2012-2026 ShopeX (https://www.shopex.cn)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


class ome_saas_request {
    protected $site;
    
    /**
     * @模拟请求方法
     * @access public
     * @param string $url 请求地址可带参数 array $postFields post方式参数数组
     * @return string
     */
    protected function curl($url, $postFields = null) {
        
        $ch = curl_init ();
        
        curl_setopt ( $ch, CURLOPT_URL, $url );
        curl_setopt ( $ch, CURLOPT_FAILONERROR, false );
        curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, true );
        
        if (is_array ( $postFields ) && 0 < count ( $postFields )) {
            $postBodyString = "";
            $postMultipart = false;
            foreach ( $postFields as $k => $v ) {
                if ("@" != substr ( $v, 0, 1 )) {
                    $postBodyString .= "$k=" . urlencode ( $v ) . "&";
                } else {
                    $postMultipart = true;
                }
            }
            
            unset ( $k, $v );
            curl_setopt ( $ch, CURLOPT_POST, true );
            if ($postMultipart) {
                curl_setopt ( $ch, CURLOPT_POSTFIELDS, $postFields );
            } else {
                curl_setopt ( $ch, CURLOPT_POSTFIELDS, substr ( $postBodyString, 0, - 1 ) );
            }
        }
        $reponse = curl_exec ( $ch );
        
        if (curl_errno ( $ch )) {
            throw new Exception ( curl_error ( $ch ), 0 );
        } else {
            $httpStatusCode = curl_getinfo ( $ch, CURLINFO_HTTP_CODE );
            if (200 !== $httpStatusCode) {
                throw new Exception ( $reponse, $httpStatusCode );
            }
        }
        curl_close ( $ch );
        
        return $reponse;
    }
    
    /**
     * @请求签名算法
     * @access public
     * @param array $params 签名参数
     * @return string
     */
    protected function generateSign($params) {
        ksort($params);

        $stringToBeSigned = '';
        foreach ($params as $k => $v)
        {
            if(($k != '_') && ($k != 'sign') && ($k != 'app_secret') && "@" != substr($v, 0, 1))
            {
                $stringToBeSigned .= $k . $v;
            }
        }
        
        unset($k, $v);
        $stringToBeSigned .= $this->site->getSecret();
        
        return strtoupper(md5($stringToBeSigned));
    }

}