<?php
namespace phpTools;
use phpTools\ArrayTools;
header('content-type:text/html;charset=utf-8');

/**
 * 跟curl相关的工具类
 * Class CurlsTools
 */

class CurlsTools{


    /**
     * GET 请求
     * @param string $url
     */
    static public function curlGet($url){
        $oCurl = curl_init();
        if(stripos($url,"https://")!==FALSE){
            curl_setopt($oCurl, CURLOPT_SSL_VERIFYPEER, FALSE);
            curl_setopt($oCurl, CURLOPT_SSL_VERIFYHOST, FALSE);
            curl_setopt($oCurl, CURLOPT_SSLVERSION, 1); //CURL_SSLVERSION_TLSv1
        }
        curl_setopt($oCurl, CURLOPT_URL, $url);
        curl_setopt($oCurl, CURLOPT_RETURNTRANSFER, 1 );
        $sContent = curl_exec($oCurl);
        $aStatus = curl_getinfo($oCurl);
        curl_close($oCurl);
        if(intval($aStatus["http_code"])==200){
            return $sContent;
        }else{
            return false;
        }
    }

    /**
     * POST 请求
     * @param string $url
     * @param array $param
     * @param boolean $post_file 是否文件上传
     * @return string content
     */
    static public function curlPost($url,$param,$post_file=false){
        $oCurl = curl_init();
        if(stripos($url,"https://")!==FALSE){
            curl_setopt($oCurl, CURLOPT_SSL_VERIFYPEER, FALSE);
            curl_setopt($oCurl, CURLOPT_SSL_VERIFYHOST, false);
            curl_setopt($oCurl, CURLOPT_SSLVERSION, 1); //CURL_SSLVERSION_TLSv1
        }
        if (is_string($param) || $post_file) {
            $strPOST = $param;
        } elseif(is_array($param)){
            $strPOST = ArrayTools::jsonEncode($param);
        }else{
            $aPOST = array();
            foreach($param as $key=>$val){
                $aPOST[] = $key."=".urlencode($val);
            }
            $strPOST =  join("&", $aPOST);
        }
        curl_setopt($oCurl, CURLOPT_URL, $url);
        curl_setopt($oCurl, CURLOPT_RETURNTRANSFER, 1 );
        curl_setopt($oCurl, CURLOPT_POST,true);
        curl_setopt($oCurl, CURLOPT_POSTFIELDS,$strPOST);
        $sContent = curl_exec($oCurl);
        $aStatus = curl_getinfo($oCurl);
        curl_close($oCurl);
        if(intval($aStatus["http_code"])==200){
            return $sContent;
        }else{
            return false;
        }
    }

    static public function  CurlFile($url,$data){
// 兼容性写法参考示例
        $curl = curl_init();
        if (class_exists('\CURLFile')) {// 这里用特性检测判断php版本
            curl_setopt($curl, CURLOPT_SAFE_UPLOAD, true);

        } else {
            if (defined('CURLOPT_SAFE_UPLOAD')) {
                curl_setopt($curl, CURLOPT_SAFE_UPLOAD, false);
            }
        }
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_POST, 1 );
        curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curl, CURLOPT_USERAGENT,"TEST");
        $result = curl_exec($curl);
    //    $error = curl_error($curl);
        $status = curl_getinfo($curl);
        curl_close($curl);
        if(intval($status["http_code"])==200){
            return $result;
        }else{
            return false;
        }
    }



    /**
     * @desc 使用curl获取远程数据
     * @param  string $url url连接路径
     * @return string      获取到的数据
     */
     public static function curlGetContents($url){

        $ch=curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);                //设置访问的url地址
        curl_setopt($ch, CURLOPT_HEADER,1);               //是否显示头部信息
        curl_setopt($ch, CURLOPT_TIMEOUT, 5);               //设置超时
        curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);   //用户访问代理 User-Agent
        curl_setopt($ch, CURLOPT_REFERER,$_SERVER['HTTP_HOST']);        //设置 referer
        curl_setopt($ch,CURLOPT_FOLLOWLOCATION,1);          //跟踪301
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);        //返回结果

        //这个是重点，加上这个便可以支持http和https下载
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

        $result = curl_exec($ch);
        curl_close($ch);
        return $result;

    }


    /**
     * @desc 异步将远程链接上的内容(图片或内容)写到本地
     * @param $url    远程地址
     * @param $saveName    保存在服务器上的文件名
     * @param $path    保存路径
     * @return boolean
     */
    public static function putFileFromUrlContent($url, $saveName, $path) {

        // 设置运行时间为无限制
        set_time_limit ( 0 );
        $url = trim ( $url );
        $curl = curl_init ();
        // 设置你需要抓取的URL
        curl_setopt ( $curl, CURLOPT_URL, $url );
        // 设置header
        curl_setopt ( $curl, CURLOPT_HEADER, 0 );

        // 设置cURL 参数，要求结果保存到字符串中还是输出到屏幕上。
        curl_setopt ( $curl, CURLOPT_RETURNTRANSFER, 1 );

        //这个是重点，加上这个便可以支持http和https下载
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);

        // 运行cURL，请求网页
        $file = curl_exec ( $curl );

        // 关闭URL请求
        curl_close ( $curl );

        // 将文件写入获得的数据
        $filename = $path . $saveName;
        $write = @fopen ( $filename, "w" );
        if ($write == false) {
            return false;
        }
        if (fwrite ( $write, $file ) == false) {
            return false;
        }
        if (fclose ( $write ) == false) {
            return false;
        }
        return true;

    }
    //    $url = "https://www.52linmin.wang/upload/portal/20171104/cb1511a3b30ef088c358286110823309.jpg";
    //    $saveName = 'whm.jpg';
    //    $path = "./"; //保存在当前目录下
    //    $res = putFileFromUrlContent($url,$saveName,$path);
    //    var_dump($res);// 当返回为true时，代表成功，反之，为失败


    /**
     * @desc 使用代理抓取页面, 为什么要使用代理进行抓取呢？以google为例吧，如果去抓google的数据，短时间内抓的很频繁的话，你就抓取不到了
     * @desc google对你的ip地址做限制这个时候，你可以换代理重新抓。
     * @param $url
     * @return mixed
     */
    public static function httpProxy($url){

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_HEADER, false);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        //是否通过http代理来传输
        curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, TRUE);
        // curl_setopt($ch, CURLOPT_PROXY, 125.21.23.6:8080);
        curl_setopt($ch, CURLOPT_PROXY, 'ip:端口号');
        //url_setopt($ch, CURLOPT_PROXYUSERPWD, 'user:password');如果要密码的话，加上这个
        $result = curl_exec($ch);
        curl_close($ch);

        return $result;

    }



    /**
     * @desc 继续保持本站session的调用, 在实现用户同步登录的情况下需要共享session,如果要继续保持本站的session,那么要把session_id放到http请求中
     * @param $url
     * @return mixed
     */
    public static function httpSession($url){

        $session_str = session_name().'='.session_id().'; path=/; domain=.explame.com';
        session_write_close(); //将数据写入文件并且结束session
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_HEADER, false);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_COOKIE, $session_str);
        $result = curl_exec($ch);
        curl_close($ch);

        return $result;

    }


}