<?php
/**
 * Class Curl  curl简单封装 get post
 */
class Curl
{

    /**
     * @brief                  get请求
     * @param $url             请求的url
     * @param array $param     请求的参数
     * @param array $header    头部数据
     * @param int $timeout     超时时间
     * @param int $followAction 是否允许被抓取的链接跳转
     * @param int $gzip         是否启用gzip压缩
     * @param string $format    格式
     * @param int $log       是否启用日志
     * @return mixed
     */
    public static function get($url, $param = array(), $header = array(), $timeout = 3, $followAction = 0, $gzip = 0, $format = 'html',$log=0)
    {
        $ch = curl_init();
        if (is_array($param)) {
            $url = $url . '?' . http_build_query($param);
        }
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)");
        if ($followAction) {
            curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); //允许被抓取的链接跳转
        }
        if ($gzip) {
            curl_setopt($ch, CURLOPT_HTTPHEADER, array('Accept-Encoding: gzip, deflate'));
            curl_setopt($ch, CURLOPT_ENCODING, 'gzip,deflate');
        }
        //curl_setopt($ch, CURLOPT_REFERER, '');
        $data = curl_exec($ch);
        if ($format == 'json') {
            $data = json_decode($data, true);
        }

        if($log){
            if($format=='html'){
                self::_logCurlInfo($ch,$param,'');
            }else{
                self::_logCurlInfo($ch,$param,$data);
            }
        }
        curl_close($ch);
        return $data;
    }

    /**
     * @brief                   post请求
     * @param $url              请求的url地址
     * @param array $param      请求的参数
     * @param array $header     http头
     * @param int $ssl          是否启用ssl
     * @param string $format    返回的格式
     * @param int $log          是否启用日志
     * @return mixed
     */
    public static function post($url, $param = array(), $header = array(), $ssl = 0, $format = 'json',$log=0)
    {
        $ch = curl_init();
        if (is_array($param)) {
            $urlparam = http_build_query($param);
        } else if (is_string($param)) { //json字符串
            $urlparam = $param;
        }
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_TIMEOUT, 120); //设置超时时间
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //返回原生的（Raw）输出
        curl_setopt($ch, CURLOPT_POST, 1); //POST
        curl_setopt($ch, CURLOPT_POSTFIELDS, $urlparam); //post数据
        if ($header) {
            curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
        }
        if ($ssl) {
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 对认证证书来源的检查
            curl_setopt($ch, CURLOPT_BINARYTRANSFER, true); //将curl_exec()获取的信息以文件流的形式返回，而不是直接输出。
        }

        $data = curl_exec($ch);
        if ($format == 'json') {
            $data = json_decode($data, true);
        }

        if($log){
            if($format=='html'){
                self::_logCurlInfo($ch,$param,'');
            }else{
                self::_logCurlInfo($ch,$param,$data);
            }
        }
        curl_close($ch);
        return $data;
    }


    /**
     * 请求信息记录日志
     * @param $ch       curl句柄
     * @param $request  请求参数
     * @param $response 响应结果
     */
    private static function _logCurlInfo($ch,$request,$response)
    {
        $info = curl_getinfo($ch);
        $resultFormat =  "耗时:[%s] 返回状态:[%s] 请求的url[%s] 请求参数:[%s] 响应结果:[%s] 大小:[%s]kb 速度:[%s]kb/s";
        $resultLogMsg =  sprintf($resultFormat,$info['total_time'],$info['http_code'],$info['url'],var_export($request,true),var_export($response,true),$info['size_download']/1024,$info['speed_download']/1024);
        error_log($resultLogMsg.PHP_EOL,3,self::CURL_LOG_PATH);
    }

}

/* example:
    echo Curl::get('http://www.baidu.com');
    $arr = Curl::post('127.0.0.1/test/test.php',['a'=>1,'b'=>2],'',0);
    var_dump($arr);
*/