PHPCrawl爬虫库实现抓取酷狗歌单的方法示例

本文实例讲述了phpcrawl爬虫库实现抓取酷狗歌单的方法。分享给大家供大家参考，具体如下：

本人看了网络爬虫相关的视频后，手痒痒，想爬点什么。最近facebook上表情包大战很激烈，就想着把所有表情包都爬下来，却一时没有找到合适的vpn，因此把酷狗最近一月精选歌曲和简单介绍抓取到本地。代码写得有点乱，自己不是很满意，并不想放上来丢人现眼。不过转念一想，这好歹是自己第一次爬虫，于是...就有了如下不堪入目的代码~~~（由于抓取的数据量较小，所以没有考虑多进程什么的，不过我看了一下phpcrawl的文档，发现phpcrawl库已经把我能想到的功能都封装好了，实现起来很方便）

<?php
header("content-type:text/html;charset=utf-8");
// it may take a whils to crawl a site ...
set_time_limit(10000);
include("libs/phpcrawler.class.php");
class mycrawler extends phpcrawler {
  function handledocumentinfo($docinfo) {
    // just detect linebreak for output ("\n" in cli-mode, otherwise "<br>").
    if (php_sapi == "cli") $lb = "\n";
    else $lb = "<br />";
    $url = $docinfo->url;
    $pat = "/http:\/\/www\.kugou\.com\/yy\/special\/single\/\d+\.html/";
    if(preg_match($pat,$url) > 0){
    $this->parsesonglist($docinfo);
    }
    flush();
  }
  public function parsesonglist($docinfo){
    $content = $docinfo->content;
    $songlistarr = array();
    $songlistarr['raw_url'] = $docinfo->url;
    //解析歌曲介绍
    $matches = array();
    $pat = "/<span>名称：<\/span>([^(<br)]+)<br/";
    $ret = preg_match($pat,$content,$matches);
    if($ret>0){
      $songlistarr['title'] = $matches[1];
    }else{
      $songlistarr['title'] = '';
    }
    //解析歌曲
    $pat = "/<a title=\"([^\"]+)\" hidefocus=\"/";
    $matches = array();
    preg_match_all($pat,$content,$matches);
    $songlistarr['songs'] = array();
    for($i = 0;$i < count($matches[0]);$i++){
      $song_title = $matches[1][$i];
      array_push($songlistarr['songs'],array('title'=>$song_title));
    }
    echo "<pre>";
    print_r($songlistarr);
    echo "</pre>";
    }
  }
$crawler = new mycrawler();
// url to crawl
$start_url="http://www.kugou.com/yy/special/index/1-0-2.html";
$crawler->seturl($start_url);
// only receive content of files with content-type "text/html"
$crawler->addcontenttypereceiverule("#text/html#");
//链接扩展
$crawler->addurlfollowrule("#http://www\.kugou\.com/yy/special/single/\d+\.html$# i");
$crawler->addurlfollowrule("#http://www.kugou\.com/yy/special/index/\d+-\d+-2\.html$# i");
// store and send cookie-data like a browser does
$crawler->enablecookiehandling(true);
// set the traffic-limit to 1 mb(1000 * 1024) (in bytes,
// for testing we dont want to "suck" the whole site)
//爬取大小无限制
$crawler->settrafficlimit(0);
// 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; 
?>

ps：这里再为大家提供2款非常方便的正则表达式工具供大家参考使用：

javascript正则表达式在线测试工具：
http://tools.jb51.net/regex/javascript

正则表达式在线生成工具：
http://tools.jb51.net/regex/create_reg

更多关于php相关内容感兴趣的读者可查看本站专题：《php正则表达式用法总结》、《php数组(array)操作技巧大全》、《php基本语法入门教程》、《php运算与运算符用法总结》、《php面向对象程序设计入门教程》、《php网络编程技巧总结》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家php程序设计有所帮助。