\Aliyun\DySDKLiteSignatureHelper

<?php

namespace Aliyun\DySDKLite;

/**
 * 签名助手 2017/11/19
 *
 * Class SignatureHelper
 */
class SignatureHelper
{

    /**
     * 生成签名并发起请求
     *
     * @param $accessKeyId string AccessKeyId (https://ak-console.aliyun.com/)
     * @param $accessKeySecret string AccessKeySecret
     * @param $domain string API接口所在域名
     * @param $params array API具体参数
     * @param $security boolean 使用https
     * @return bool|\stdClass 返回API接口调用结果，当发生错误时返回false
     */
    public function request($accessKeyId, $accessKeySecret, $domain, $params, $security = false)
    {
        $apiParams = array_merge(array(
            "SignatureMethod" => "HMAC-SHA1",
            "SignatureNonce" => uniqid(mt_rand(0, 0xffff), true),
            "SignatureVersion" => "1.0",
            "AccessKeyId" => $accessKeyId,
            "Timestamp" => gmdate("Y-m-d\TH:i:s\Z"),
            "Format" => "JSON",
        ), $params);
        ksort($apiParams);

        $sortedQueryStringTmp = "";
        foreach ($apiParams as $key => $value) {
            $sortedQueryStringTmp .= "&" . $this->encode($key) . "=" . $this->encode($value);
        }

        $stringToSign = "GET&%2F&" . $this->encode(substr($sortedQueryStringTmp, 1));

        $sign = base64_encode(hash_hmac("sha1", $stringToSign, $accessKeySecret . "&", true));

        $signature = $this->encode($sign);

        $url = ($security ? 'https' : 'http') . "://{$domain}/?Signature={$signature}{$sortedQueryStringTmp}";

        try {
            $content = $this->fetchContent($url);
            return json_decode($content);
        } catch (\Exception $e) {
            return false;
        }
    }

    private function encode($str)
    {
        $res = urlencode($str);
        $res = preg_replace("/\+/", "%20", $res);
        $res = preg_replace("/\*/", "%2A", $res);
        $res = preg_replace("/%7E/", "~", $res);
        return $res;
    }

    private function fetchContent($url)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_TIMEOUT, 5);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
            "x-sdk-client" => "php/2.0.0"
        ));

        if (substr($url, 0, 5) == 'https') {
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        }

        $rtn = curl_exec($ch);

        if ($rtn === false) {
            trigger_error("[CURL_" . curl_errno($ch) . "]: " . curl_error($ch), E_USER_ERROR);
        }
        curl_close($ch);

        return $rtn;
    }

    public function getErrCode($code)
    {
        $array = [
            'OK' => '发送成功',
            'isp.RAM_PERMISSION_DENY' => 'RAM权限DENY',
            'isv.OUT_OF_SERVICE' => '业务停机',
            'isv.PRODUCT_UN_SUBSCRIPT' => '未开通云通信产品的阿里云客户',
            'isv.PRODUCT_UNSUBSCRIBE' => '产品未开通',
            'isv.ACCOUNT_NOT_EXISTS' => '账户不存在',
            'isv.ACCOUNT_ABNORMAL' => '账户异常',
            'isv.SMS_TEMPLATE_ILLEGAL' => '短信模板不合法',
            'isv.SMS_SIGNATURE_ILLEGAL' => '短信签名不合法',
            'isv.INVALID_PARAMETERS' => '参数异常',
            'isp.SYSTEM_ERROR' => '系统错误',
            'isv.MOBILE_NUMBER_ILLEGAL' => '非法手机号',
            'isv.MOBILE_COUNT_OVER_LIMIT' => '手机号码数量超过限制',
            'isv.TEMPLATE_MISSING_PARAMETERS' => '模板缺少变量',
            'isv.BUSINESS_LIMIT_CONTROL' => '业务限流',
            'isv.INVALID_JSON_PARAM' => 'JSON参数不合法，只接受字符串值',
            'isv.BLACK_KEY_CONTROL_LIMIT' => '黑名单管控',
            'isv.PARAM_LENGTH_LIMIT' => '参数超出长度限制',
            'isv.PARAM_NOT_SUPPORT_URL' => '不支持URL',
            'isv.AMOUNT_NOT_ENOUGH' => '账户余额不足',
        ];
        if (isset($array[$code])) {
            return $array[$code];
        } else {
            return false;
        }
    }
}