<?php
namespace app\admin\controller;

/**
 * 阿里云短信发送接口
 */
class Alisms
{
    public $accesskeyid = "";
    public $accesskeysecret = '';
    public $gatewayUrl = "http://dysmsapi.aliyuncs.com/";
    
    public $format = "JSON";
    protected $signatureMethod  = "HMAC-SHA1";
    protected $regionId         = "cn-hangzhou";
    protected $signatureVersion = "1.0";
    protected $version          = "2017-05-25";
    protected $action           = "SendSms";

    public function __construct($accesskeyid = "",$accesskeysecret = "")
    {
        if($accesskeyid&&$accesskeysecret){
            $this->accesskeyid = $accesskeyid;
            $this->accesskeysecret = $accesskeysecret ;
        }
    }

    protected function generateSign($params)
    {
        ksort($params);
        $stringToSign = "";
        foreach ($params as $k => $v){
            $stringToSign .= "&"."$k=" . urlencode($v);
        }
        $stringToSign = "POST&%2F&".urlencode(substr($stringToSign, 1));
        return base64_encode(hash_hmac('sha1', $stringToSign, $this->accesskeysecret."&", true));
    }

    public function curl($url, $postFields = null)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);
        $reponse = curl_exec($ch);
        curl_close($ch);
        return $reponse;
    }

    public function sendSms()
    {
        $sysParams["AccessKeyId"]       = $this->accesskeyid;
        $sysParams["RegionId"]          = $this->regionId;
        $sysParams["Format"]            = $this->format;
        $sysParams["SignatureMethod"]   = $this->signatureMethod;
        $sysParams["SignatureVersion"]  = $this->signatureVersion;
        $sysParams["Action"]            = $this->action;
        $sysParams["Version"]           = $this->version;
        date_default_timezone_set("GMT");
        $sysParams["SignatureNonce"]    = uniqid();
        $sysParams["Timestamp"]         = date("Y-m-d\TH:i:s\Z");
        $sysParams["Signature"]         = $this->generateSign(array_merge($sysParams));
        $resp = $this->curl($this->gatewayUrl, array_merge($sysParams));
        $respObject = json_decode($resp, true);
        return $respObject;
    }
}
?>