phprs\util\Curl::execCurl PHP Method

    private function execCurl($url, $method = 'GET', $content = null, $headers = null, $followLoc = true)
    {
        $res = new CurlResponse();
        if (isset($method)) {
            curl_setopt($this->ch, CURLOPT_CUSTOMREQUEST, $method);
        }
        curl_setopt($this->ch, CURLOPT_URL, $url);
        curl_setopt($this->ch, CURLOPT_TIMEOUT, $this->timeout);
        if (!empty($headers)) {
            curl_setopt($this->ch, CURLOPT_HTTPHEADER, $headers);
        }
        curl_setopt($this->ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($this->ch, CURLOPT_FOLLOWLOCATION, $followLoc ? 1 : 0);
        //支持跳转
        //curl_setopt($this->ch, CURLOPT_HEADERFUNCTION, array($res,'handleHeader')); // handle received headers
        curl_setopt($this->ch, CURLOPT_HEADER, true);
        if (!empty($content)) {
            $content_type = '';
            // 取content-type
            foreach ($headers as $h) {
                list($n, $v) = explode(':', $h) + array(null, null);
                if (strcasecmp(trim($n), 'Content-Type') === 0) {
                    $content_type = trim($v);
                    break;
                }
            }
            if (is_array($content) && $content_type == 'application/json') {
                curl_setopt($this->ch, CURLOPT_POSTFIELDS, json_encode($content));
            } else {
                if ($content_type == 'multipart/form-data') {
                    curl_setopt($this->ch, CURLOPT_POSTFIELDS, $content);
                } else {
                    if (is_array($content)) {
                        curl_setopt($this->ch, CURLOPT_POSTFIELDS, http_build_query($content));
                    } else {
                        curl_setopt($this->ch, CURLOPT_POSTFIELDS, $content);
                    }
                }
            }
        }
        $response = curl_exec($this->ch);
        $res->http_code = curl_getinfo($this->ch, CURLINFO_HTTP_CODE);
        $res->errno = curl_errno($this->ch);
        $res->errstr = curl_error($this->ch);
        $res->parseReturnData($response);
        return $res;
    }