public static string GetHtml()

         {

             string url = "http://www.baidu.com";

             string Html = string.Empty;//初始化新的webRequst

             HttpWebRequest Request = (HttpWebRequest)WebRequest.Create(url);

             Request.Timeout = ;

             Request.ReadWriteTimeout = ;

          //   Request.ImpersonationLevel = TokenImpersonationLevel.Anonymous;

             Request.Headers.Add("Accept-Language", "zh-cn,en-us;q=0.5");

           //  Request.Headers.Add("Accept-Encoding", "gzip, deflate");

             Request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;

             Request.KeepAlive = true;

             Request.ProtocolVersion = HttpVersion.Version11;

             Request.Method = "GET";

             Request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8";

             Request.Host = "www.baidu.com";

             //Request.Accept = "text/json,*/*;q=0.5";

             //Request.Headers.Add("Accept-Charset", "utf-8;q=0.7,*;q=0.7");

             //Request.Headers.Add("Accept-Encoding", "gzip, deflate, x-gzip, identity; q=0.9");

             Request.UserAgent = @"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36";

             Request.Referer = url;

             Request.IfModifiedSince = DateTime.UtcNow;

             HttpWebResponse htmlResponse = (HttpWebResponse)Request.GetResponse();

             //从Internet资源返回数据流

              Stream htmlStream = htmlResponse.GetResponseStream();

            // Stream htmlStream = new System.IO.Compression.GZipStream(htmlResponse.GetResponseStream(), System.IO.Compression.CompressionMode.Decompress);

             //读取数据流

             StreamReader weatherStreamReader = new StreamReader(htmlStream, Encoding.GetEncoding("gb2312"));

             //读取数据

             Html = weatherStreamReader.ReadToEnd();

             weatherStreamReader.Close();

             htmlStream.Close();

             htmlResponse.Close();

             //针对不同的网站查看html源文件

             return Html;

         }      

$headers = array();

$headers[] = 'X-Apple-Tz: 0';

$headers[] = 'X-Apple-Store-Front: 143444,12';

$headers[] = 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8';

$headers[] = 'Accept-Encoding: gzip, deflate';

$headers[] = 'Accept-Language: en-US,en;q=0.5';

$headers[] = 'Cache-Control: no-cache';

$headers[] = 'Content-Type: application/x-www-form-urlencoded; charset=gb2312';//utf-8

$headers[] = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36';

$dat = cUrlGetData($url, $post_fields, $headers);

        function cUrlGetData($url, $post_fields = null, $headers = null) {

           $ch = curl_init();

            $timeout = 50000;

            curl_setopt($ch, CURLOPT_URL, $url);

            if ($post_fields && !empty($post_fields)) {

                curl_setopt($ch, CURLOPT_POST, 1);

                curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);

            }

            if ($headers && !empty($headers)) {

                curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

            }

            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);

            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);

            curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);

            curl_setopt($ch, CURLOPT_ENCODING, 'gzip,deflate');//这个是解释gzip内容.................

            $data = curl_exec($ch);

            if (curl_errno($ch)) {

                echo 'Error:' . curl_error($ch);

            }

            curl_close($ch);

            return $data;

        }

        //php脚本开始

     /*POST请求远程内容函数*/

     function ppost($url,$data,$ref){ // 模拟提交数据函数

        $curl = curl_init(); // 启动一个CURL会话

        curl_setopt($curl, CURLOPT_URL, $url); // 要访问的地址

        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0); // 对认证证书来源的检查

        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 1); // 从证书中检查SSL加密算法是否存在

        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_REFERER, $ref);

        curl_setopt($curl, CURLOPT_POST, 1); // 发送一个常规的Post请求

        curl_setopt($curl, CURLOPT_POSTFIELDS, $data); // Post提交的数据包

        curl_setopt($curl, CURLOPT_COOKIEFILE,$GLOBALS ['cookie_file']); // 读取上面所储存的Cookie信息

        curl_setopt($curl, CURLOPT_COOKIEJAR, $GLOBALS['cookie_file']); // 存放Cookie信息的文件名称

        curl_setopt($curl, CURLOPT_HTTPHEADER,array('Accept-Encoding: gzip, deflate'));

        curl_setopt($curl, CURLOPT_ENCODING, 'gzip,deflate');//这个是解释gzip内容.................

        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

        $tmpInfo = curl_exec($curl); // 执行操作

        if (curl_errno($curl)) {

           echo 'Errno'.curl_error($curl);

        }

        curl_close($curl); // 关键CURL会话

        return $tmpInfo; // 返回数据

    }