PHPCrawler抓取酷狗精选集歌单

一、PHPCrawler的介绍与安装

先了解一下什么是抓取？

抓取就是网络爬虫，也就是人们常说的网络蜘蛛（spider）。是搜索引擎的一个重要组成部分，按照一定的逻辑和算法抓取和下载互联网上的信息和网页。一般的爬虫从一个start url开始，按照一定的策略开始爬取，把爬取到的新的url放入爬取队列中，然后进行新一轮的爬取，直到抓取完毕为止。

PHPCrawler是一个国外开源的爬虫系统，它的源码托管在sourceforge里，这是它的下载地址：点击打开链接

，根据自己电脑里安装的PHP版本选择合适的版本下载。下载完毕之后，解压到服务器网站根目录下，复制example.php文件，并重命名。

二、完整源码

<?php

// It may take a whils to crawl a site ...
set_time_limit(10000);

// Inculde the phpcrawl-mainclass
include("libs/PHPCrawler.class.php");

// Extend the class and override the handleDocumentInfo()-method 
class MyCrawler extends PHPCrawler 
{
  //在这里解析页面内容
  function handleDocumentInfo($DocInfo) 
  {
    // Just detect linebreak for output ("\n" in CLI-mode, otherwise "<br>").
    if (PHP_SAPI == "cli") $lb = "\n";
    else $lb = "<br />";

    // Print the URL and the HTTP-status-Code
    echo "Page requested: ".$DocInfo->url." (".$DocInfo->http_status_code.")".$lb;
    
    // Print the refering URL
    echo "Referer-page: ".$DocInfo->referer_url.$lb;
    
    // Print if the content of the document was be recieved or not
    if ($DocInfo->received == true)
      echo "Content received: ".$DocInfo->bytes_received." bytes".$lb;
    else
      echo "Content not received".$lb; 
    
    // Now you should do something with the content of the actual
    // received page or file ($DocInfo->source), we skip it in this example 
    //echo $DocInfo->source;
    //echo $lb;
    $url=$DocInfo->url;
    $pat="/http:\/\/www\.kugou\.com\/yy\/special\/single\/\d+\.html/";
    if(preg_match($pat,$url)>0){
      $this->parseSonglistDetail($DocInfo);
    }
    flush();
  } 

  public function parseSonglistDetail($DocInfo){
        
        $songlistArr=array();
        $songlistArr['raw_url']=$DocInfo->url;
        $content=$DocInfo->content;
        //名称
        $matches=array();
        $pat="/<span>名称：<\/span>([^(<br)]+)<br \/>/";
        $res=preg_match($pat, $content,$matches);
        if($res>0){
          $songlistArr['title']=$matches[1];
        }else{
          $songlistArr['title']="";
          print "error:get title fail<br/>";
        }
        //创建人
        $matches=array();
        $pat="/<span>创建人：<\/span>([^(<br)]+)<br \/>/";
        $res=preg_match($pat, $content,$matches);
        if($res>0){
          $songlistArr['creator']=$matches[1];
        }else{
          $songlistArr['creator']="";
          print "error:get creator fail<br/>";
        }
        //创建时间
        $matches=array();
        $pat="/<span>更新时间：<\/span>([^(<br)]+)<br \/>/";
        $res=preg_match($pat, $content,$matches);
        if($res>0){
          $songlistArr['create_date']=$matches[1];
        }else{
          $songlistArr['create_date']="";
          print "error:get create_date fail<br/>";
        }
        //简介
        $matches=array();
        $pat="/<span>简介：<\/span>([^(<\/p)]*)<\/p>/";
        $res=preg_match($pat, $content,$matches);
        if($res>0){
          $songlistArr['info']=$matches[1];
        }else{
          $songlistArr['info']="";
          print "error:get info fail<br/>";
        }
        //歌曲
        $matches=array();
        $pat="/<a title=\"([^\"]+)\" hidefocus=\"/";
        $res=preg_match_all($pat, $content,$matches);
        
        if($res>0){
          $songlistArr['songs']=array();
          for($i=0;$i<count($matches[1]);$i++){
            $song_title=$matches[1][$i];
            array_push($songlistArr['songs'],array('title'=>$song_title));
          }
        }else{
          $songlistArr['song']="";
          print "error:get song fail<br/>";
        }
        
        echo "<pre>";
        print_r($songlistArr);
        echo "</pre>";
        $this->saveSonglist($songlistArr);
  }


  public function saveSonglist($songlistArr){
    //连接数据库
    $conn=mysql_connect("localhost","root","root");
    mysql_select_db("songlist",$conn);
    mysql_query("set names utf8");
    $songlist=array();
    $songlist['title']=mysql_escape_string($songlistArr['title']);
    $songlist['create_time']=mysql_escape_string($songlistArr['create_date']);
    $songlist['creator']=mysql_escape_string($songlistArr['creator']);
    $songlist['raw_url']=mysql_escape_string($songlistArr['raw_url']);
    $songlist['info']=mysql_escape_string($songlistArr['info']);
    $sql="insert into songlist set".
    "title=''".$songlist['title']."'".
    ",creat_time=''".$songlist['create_time']."'".
    ",creator=''".$songlist['creator']."'".
    ",raw_url=''".$songlist['raw_url']."'".
    ",info=''".$songlist['info']."';";
    mysql_query($sql,$conn);
    $songlist_id=mysql_insert_id();
    foreach($songlistArr['songs'] as $song){
      $title=mysql_escape_string($song['title']);
      $sql="insert into song set title='".$title."'" .",songlist_id=".$songlist_id.";";
      mysql_query($sql);

    }
    mysql_close($conn);
  }
}

// Now, create a instance of your class, define the behaviour
// of the crawler (see class-reference for more options and details)
// and start the crawling-process.
//创建一个爬虫
$crawler = new MyCrawler();
//设置一个开始的连接
// URL to crawl
$start_url="www.kugou.com/yy/special/index/1-0-2.html";
$crawler->setURL($start_url);
//设置内容的类型
// Only receive content of files with content-type "text/html"
$crawler->addContentTypeReceiveRule("#text/html#");
//忽略图片，设置那些连接不需要下载

//每一个精选集的连接
$crawler->addURLFollowRule("#http://www\.kugou\.com/yy/special/single/\d+\.html# i");//i 忽略大小写
//精选集页面的链接 下一页
$crawler->addURLFollowRule("#http://www\.kugou\.com/yy/special/index/\d+-0-2.html# i");

// Ignore links to pictures, dont even request pictures
$crawler->addURLFilterRule("#\.(jpg|jpeg|gif|png)$# i");

// Store and send cookie-data like a browser does
$crawler->enableCookieHandling(true);

// Set the traffic-limit to 1 MB (in bytes,
// for testing we dont want to "suck" the whole site)
//数据内容的容量，多少m，0是无限的
$crawler->setTrafficLimit(1000 * 1024);

// Thats enough, now here we go
$crawler->go();

// At the end, after the process is finished, we print a short
// report (see method getProcessReport() for more information)
$report = $crawler->getProcessReport();

if (PHP_SAPI == "cli") $lb = "\n";
else $lb = "<br />";
    
echo "Summary:".$lb;
echo "Links followed: ".$report->links_followed.$lb;
echo "Documents received: ".$report->files_received.$lb;
echo "Bytes received: ".$report->bytes_received." bytes".$lb;
echo "Process runtime: ".$report->process_runtime." sec".$lb; 
?>