class UsualFunForNetWorkHelper

{

    /***

     * post请求数据

     */

    public static function HttpsPost($url, $data = null, $headers = null)

    {

        $curl = curl_init();

        curl_setopt($curl, CURLOPT_URL, $url);

        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);

        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);

        if (!empty($data)){

            curl_setopt($curl, CURLOPT_POST, 1);

            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);

        }

        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

        $output = curl_exec($curl);

        curl_close($curl);

        header("Content-type: text/html; charset=utf-8");

        return $output;

    }

    /***

     * http的get访问方法

     */

    public static function HttpGet($url, $headers = null)

    {

        $curl = curl_init();

        curl_setopt($curl, CURLOPT_URL, $url);

        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);

        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);

        curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']); // 模拟用户使用的浏览器

        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1); // 使用自动跳转

        curl_setopt($curl, CURLOPT_AUTOREFERER, 1); // 自动设置Referer

        curl_setopt($curl, CURLOPT_TIMEOUT, 30); // 设置超时限制防止死循环

        //curl_setopt($curl, CURLOPT_HEADER, 0); // 显示返回的Header区域内容

        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); // 获取的信息以文件流的形式返回

        $output = curl_exec($curl);

        //echo '['.$output.']';

        return $output;

    }

    /**

     * 获取图片

     * @param $url

     * @param $content_type

     * @return bool|int|mixed

     */

    public static function HttpGetImg($url,&$content_type,&$error='')

    {

        $content_type = '';

        $count = 0;

        $e_no = 28;

        while($count < 10 && $e_no === 28)//网络超时，10次重复请求

        {

            $curl = curl_init();

            curl_setopt($curl, CURLOPT_URL, $url);

            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);

            curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);

            curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']); // 模拟用户使用的浏览器

            curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1); // 使用自动跳转

            curl_setopt($curl, CURLOPT_AUTOREFERER, 1); // 自动设置Referer

            curl_setopt($curl, CURLOPT_TIMEOUT, 5); // 设置超时限制防止死循环

            //curl_setopt($curl, CURLOPT_HEADER, 0); // 显示返回的Header区域内容

            curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); // 获取的信息以文件流的形式返回

            $output = curl_exec($curl);

            $content_type = curl_getinfo($curl,CURLINFO_CONTENT_TYPE);

            $e_no = curl_errno($curl);

            curl_close($curl);

            $count ++;

        }

        if($e_no !== 0)

        {

            $error = $e_no;

            if($e_no === 28)

            {

                Log::write('请求图片超时10次，放弃,url:'.$url);

            }

            return false;

        }

        $content_type = strval($content_type);

        $ok_type=[

            'application/octet-stream',

            'image/bmp',

            'image/gif',

            'image/jpeg',

            'image/png'

        ];

        if(!in_array($content_type,$ok_type))

        {

            return false;

        }

        return $output;

    }

}