php网页采集 修改版

改进了检查，显示给出错误提示信息，匹配模式更通用

<?php
header("content-type: text/html; charset=gb2312");
class HttpWrap
{
    public $timeout=10;
    public $status='';

    public $host;
    public $port=80;
    private $ip;
    private $conn;
    private $path;
    private $url;
    private $scheme;

    public $http_method='GET';
    public $http_version="HTTP/1.1";
    public $agent="Mozilla/5.0 (Windows NT 6.1; rv:33.0) Gecko/20100101 Firefox/33.0";
    public $accept="image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*";
    public $gzip="gzip";
    public $referer;
    public $cookie;
    public $submit_type="application/x-www-form-urlencoded";
    private $accept_language="zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3";
    public $connection="keep-alive";


    private $cmd_line;
    private $header;
    public $post_content;

    private $redirect;
    private $is_gzip;
    public $response_num;
    public $response_header;
    public $response_body_length=0;
    public $response_body;

    public $roll_link;
    public $roll_group;
    public $filename;
    public $encoding;
	
	public $match_status=0;

   public  function init($url)
    {
        $this->url=$url;
        $url_pair = parse_url($url);
        $this->host = $url_pair['host'];
        $this->path = $url_pair['path'];
        $this->scheme = $url_pair['scheme'];

        if(empty($this->ip))
        {
            $this->ip = gethostbyname($this->host);
        }

        if(!empty($url_pair['port']))
        {
            $this->port = $url_pair['port'];
        }
     
			if($this->connect())
			{
				$this->sendRequest();
			}
			else
			{
				die($this->status);
			}
		
        //如果响应头部存在重定向，则对重定向发送请求
        if($this->redirect)
        {
            if(preg_match("#^http://".preg_quote($this->host)."#i",$this->redirect))
            {
                $this->referer=$this->host."/".parse_url($this->redirect)['path'];
                $this->init($this->redirect);
            }
        }
        if($this->roll_link)
        {
            $next_url = substr($this->url,0,strripos($this->url, '/')+1).$this->roll_link;
            //如果下一页等于当前页
            if(strtolower(trim(basename($this->url,'.html'))) == strtolower(trim(basename($next_url,'.html'))))
            {
               $next_group = $this->getNextGroup($this->response_body);
               echo "<font color='color'>即将采集下一组</font><br />";
               sleep(1);
               $this->init($next_group);
            }
            else
            {
                $this->init($next_url);
            }

        }
        else
        {
            die("<font color='red'>没有下一页,原因是</font>：".$this->match_status);
			
        }

    }

   private function connect()
   {

       $this->conn = fsockopen($this->ip,$this->port,$errno,$errstr,$this->timeout);
       if($this->conn)
       {
           $this->status = '链接成功';
           return true;
       }
       else
       {
            switch($errno)
            {
                case -3:
                        $this->status="创建socket链接失败";
                case -4:
                        $this->status="dns查询失败";
                case -5:
                        $this->status="链接被拒绝或超时";
                default:
                        $this->status="创建连接失败";
            }
            return false;
       }
   }
   private function sendRequest()
   {
       if(empty($this->path))
       {
           $this->path="/";
       }
       $this->cmd_line=$this->http_method." ".$this->path." ".$this->http_version."\r\n";

       if(!empty($this->host))
       {
           $this->header .= "Host: ".$this->host."\r\n";
       }

       if(!empty($this->agent))
       {
           $this->header .="User-Agent: ".$this->agent."\r\n";
       }

       if(!empty($this->accept))
       {
           $this->header .= "Accept: ". $this->accept ."\r\n";
       }
       if(!empty($this->gzip))
       {
           if ( function_exists("gzinflate") )
           {
                $this->header .= "Accept-encoding: gzip\r\n";
            }
            else
            {
                $this->status = "不支持压缩";
            }
       }
       if(empty($this->referer))
       {
           $this->header .= "Referer: ".$this->url."\r\n";
       }
	   else
	   {
			$this->header .= "Referer: ".$this->referer."\r\n";
	   }
       if(!empty($this->accept_language))
       {
           $this->header .= "Accept-Language: ".$this->accept_language."\r\n";
       }
       if(!empty($this->cookie))
       {
           if(!is_array($this->cookie))
           {
               $this->header .="Cookie: ".$this->cookie;
           }
           else
           {
               if(count($this->cookie) >0)
               {
                   $cookie = "Cookie: ";
                   foreach($this->cookie as $key => $val)
                   {
                       $cookie.=$key."=".urlencode($val).";";
                   }
                  $cookie = substr($cookie, 0, strlen($cookie)-1)."\r\n";
               }
               $this->header .= $cookie;
           }
       }
       if(!empty($this->submit_type))
       {
           $this->header .="Content-Type: ".$this->submit_type."\r\n";
       }
       if(!empty($this->post_content))
       {
           $this->header .= "Content-length: ".strlen($this->post_content)."\r\n";
       }
       if(!empty($this->connection))
       {
           $this->header .= "Connection: ".$this->connection."\r\n";
       }
       $this->header .="\r\n";
       //上面是HTTP请求头部信息
       //echo $this->cmd_line.$this->header.$this->post_content; exit();
       //发送请求
       $len = strlen($this->cmd_line.$this->header.$this->post_content);

        if($len != fwrite($this->conn, $this->cmd_line.$this->header.$this->post_content,$len))
        {
            $this->status = "发送请求failed";
            die($this->status);
        }
       //接受响应，每次读取一行内容，首先解析响应头
       while($response_header = fgets($this->conn, 1024))
       {
           if(preg_match("#^HTTP/#",$response_header))
            {
                //匹配状态数字,200表示请求成功
                if(preg_match("#^HTTP/[^\s]*\s(.*?)\s#",$response_header, $status))
                {
                        $this->response_num= $status[1];//返回代表数字的状态
                }
            }
            //echo $this->response_num; exit();
            // 判断是否需要重定向
            if(preg_match("#^(Location:|URI:)#i",$response_header))
            {
                // 获取重定向地址
                preg_match("#^(Location:|URI:)\s+(.*)#",trim($response_header),$matches);

                //如果重定向字段不包含主机名，不是以以://开头的，则拼接王完整的请求地址，模式+主机+端口
                if(!preg_match("#\:\/\/#",$matches[2]))
                {
                    // 补全主机名
                    $this->redirect = "http://".$this->host.":".$this->port;

                    //添加路径
                    if(!preg_match("|^/|",$matches[2]))
                           $this->redirect .= "/".$matches[2];
                    else
                           $this->redirect .= $matches[2];
                }
                else
                //包含完整的主机地址
                        $this->redirect = $matches[2];
            }

        //判断返回的数据的压缩格式
	if (preg_match("#^Content-Encoding: gzip#", $response_header) )
          {
                $this->is_gzip = true;
          }
          if(preg_match('#^Content-Length:\s*(\d+)#i', $response_header, $len))
          {
              $this->response_body_length = $len[1];
          }
          if(preg_match('#^Set-Cookie:#i', $response_header))
          {
              $items = explode(':', $response_header);
              $this->cookie = explode(';', $items[1])[0];

          }

        //解析完响应头部
        if(preg_match("/^\r?\n$/", $response_header) )
            break;

        $this->response_header[]=$response_header;
       }
       //可以成功返回响应头部信息,响应状态码也为200
      //var_dump($this->response_header); exit();

        if($this->response_num==200)
        {
            $sub_dir;
            $dirname;
            $path;
            $filename;
            if(preg_match('#/(\d+)/#', $this->url, $sub_dir))
            {
                $dirname = "./download/".$sub_dir[1];
            }
            else
            {
                $dirname = "./download/".date("Ymd");
            }

            $len=0;
            while($items = fread($this->conn, $this->response_body_length))
            {
                if(!is_dir($dirname))
                {
                    $path = mkdir($dirname,0777,true);
                }
                $filename = $dirname.'/'.basename($this->url);
			
                $len = $len+strlen($items);
                $this->response_body = $items;
                file_put_contents($filename, $items, FILE_APPEND);
                //这里必须判断读取的长度，不然会在这里阻塞
                if($len >= $this->response_body_length) break;

            }

            if($this->is_gzip)
            {
                $this->response_body = gzinflate ($this->response_body);
            }
            echo str_repeat("  ", 2048);
            echo "对链接".$this->url."发起请求<br />";
            $this->getRollLink($this->response_body);
        }
   }
   //这个函数主要实现分析出下一页的链接
    private function getRollLink($content, $flag='')
   {
       if(preg_match('#<ul\s+class="image"[^>]*?>.*?</ul>#is', $content, $match))
       {
           if(preg_match_all('#<a\s+[^>]+?>.*?</a>#is', $match[0], $items))
		   {
				//var_dump($items[0]);
				$len = count($items[0]);
				$next_page = $items[0][$len-1];
				if(preg_match('#<a\s+href="([^"]+)"\s*>#i', $next_page, $link))
				{
					$this->roll_link = $link[1];
				}
				else
				{
					$this->roll_link = false;
					$this->match_status="匹配下一页失败";
				}
		   }
		   else
		   {
				$this->roll_link = false;
				$this->match_status="匹配<a>组失败";
		   }
       }
       else
       {
          $this->roll_link = false;
		  $this->match_status="匹配image分页组失败";
       }
   }
   //这个函数主要实现分析出下一组的链接
   private  function getNextGroup($content)
   {
       
	if(preg_match('#<ul\s+class="page"[^>]*?>.*?</ul>#is', $content, $match))
       {
			//echo $match[0]."<br />";
           if(preg_match_all('#<a\s+href="([^"]*?)">.*?</a>#si', $match[0], $next))
           {
                //var_dump($next[1]);
                $choice;
                if(count($next[1])==2)
                {
                    $first = basename($next[1][0], ".html");
                    $second = basename($next[1][1], ".html");
                    //往前翻页,进入下一组
                    if(intval($first) < intval($second))
                    {
                            $choice = $first;
                    }
                    else
                    {
                            $choice = $second;
                    }
                    //h获取下一组
                    foreach($next[1] as $item)
                    {
                        if(strripos($item, $choice) !=false )
                        {
                            if(substr($item, 0,2) =='..')
                            {
                                    $link=  substr($item, 2);
                                    $sub_path = explode('/', $this->path);
                                    $url = $this->scheme.'://'.$this->host.'/'.$sub_path[1].$link;
                                    return $url;
                            }
                        }
                    }
                }
                //如果是最后一组，即没有下一组了
                else if(count($next[1])==1)
                {
                      if(substr($next[1][0],0,2)=='..')
                      {
                        $link = substr($next[1][0],2);
                        $sub_path = explode('/', $this->path);
                        $url = $this->scheme.'://'.$this->host.'/'.$sub_path[1].$link;
                        return $url;
                      }
                }
           }
           else
           {
               $this->status = "failed to match href";
           }

       }
       else
       {
            $this->status = "failed to match class=page";
       }
   }

}
ob_implicit_flush(true);
set_time_limit(0);
$url = $url = "http://www.mmkao.com/Beautyleg/201412/7066_2.html";
$http = new HttpWrap();
$http->init($url);
?>