<?php


class refill_proxy
{
    private $mKey;

    public function __construct($key)
    {
        $this->mKey = $key;
    }

    public function send($url,$params)
    {
        $body = $this->body($params);
        $body .= "&key={$this->mKey}";
        $params['sign'] = md5($body);

        $resp = $this->http_request($url,$params,'POST');
        Log::record("resp={$resp}",Log::DEBUG);

        if(empty($resp)) {
            return [false,'网络错误'];
        }

        $resp = json_decode($resp,true);
        $code = $resp['code'];

        if(empty($resp)) {
            return [false,'网络错误'];
        }
        elseif($code == 200) {
            return [$code,$resp['datas']];
        }
        else {
            return [$code,$resp['message']];
        }
    }

    public function notify($params)
    {
        unset($params['mchname']);

        if(!$this->verify($this->mKey,$params)) {
            return [false,'签名错误'];
        }
        else {
            return [true,$params];
        }
    }

    private function verify($key,$input)
    {
        $sign = $input['sign'];
        unset($input['sign']);

        $body = $this->body($input);
        $body .= "&key={$key}";

        return ($sign == md5($body));
    }

    protected function check_empty($value)
    {
        if (!isset($value))
            return true;
        if ($value === null)
            return true;
        if (trim($value) === "")
            return true;

        return false;
    }

    private function body($params)
    {
        ksort($params);
        $body = "";
        $i = 0;
        foreach ($params as $k => $v)
        {
            if (false === $this->check_empty($v) && "@" != substr($v, 0, 1))
            {
                if ($i == 0) {
                    $body .= "{$k}" . "=" . urlencode($v);
                } else {
                    $body .= "&" . "{$k}" . "=" . urlencode($v);
                }
                $i++;
            }
        }
        return $body;
    }

    private function http_request($url, $params = array(), $method = 'GET', $multi = false, $extheaders = array())
    {
        if (!function_exists('curl_init')) {
            return false;
        }

        $method = strtoupper($method);
        $ci = curl_init();
        curl_setopt($ci, CURLOPT_USERAGENT, 'PHP-SDK OAuth2.0');
        curl_setopt($ci, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ci, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ci, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ci, CURLOPT_HEADER, false);
        curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, 60);
        curl_setopt($ci, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
        curl_setopt($ci, CURLOPT_FOLLOWLOCATION, true);


        $headers = (array) $extheaders;
        switch ($method)
        {
            case 'POST':
                curl_setopt($ci, CURLOPT_POST, TRUE);
                if (!empty($params))
                {
                    if ($multi)
                    {
                        foreach ($multi as $key => $file) {
                            $params[$key] = '@' . $file;
                        }
                        curl_setopt($ci, CURLOPT_POSTFIELDS, $params);
                        $headers[] = 'Expect: ';
                    }
                    else {
                        curl_setopt($ci, CURLOPT_POSTFIELDS, http_build_query($params));
                    }
                }
                break;
            case 'DELETE':
            case 'GET':
                if($method == 'DELETE') {
                    curl_setopt($ci, CURLOPT_CUSTOMREQUEST, 'DELETE');
                }
                if (!empty($params)) {
                    $url = $url . (strpos($url, '?') ? '&' : '?') . (is_array($params) ? http_build_query($params) : $params);
                }
                break;
        }
        curl_setopt($ci, CURLINFO_HEADER_OUT, TRUE);
        curl_setopt($ci, CURLOPT_URL, $url);
        if ($headers) {
            curl_setopt($ci, CURLOPT_HTTPHEADER, $headers);
        }

        $response = curl_exec($ci);
        if($response == false) {
            $err = curl_error($ci);
            Log::record("http_request err={$err}",Log::ERR);
        }

        curl_close($ci);

        return $response;
    }
}