PHP CURL 同步/异步 并发 采集 爬行
在上一篇文章基础上对代码进行了整理,并合并进同步采集的方法
类中用到了另一个 Proxy代理类,请自行实现, 如果不需要使用代理,请去除相关代码
同步调用示意
$this->catcher=new LCatcher(10,20,false,true,true);
list($code,$content)=$this->catcher->get($url);
并发采集示意
$this->catch=new LCatcher(10,$asynNum,true);
$this->catch->pushJob($this,$url,9);
完整代码如下
<?php
/**
* 并发异步采集者
*/
class LCatcher {
//以下是需要配置的运行参数
public $timeout=10; //默认的超时设置 10 秒
public $useProxy=true; //是否使用代理服务器
public $concurrentNum=20; //并发数量
public $autoUserAgent=true; //是否自动更换UserAgent
public $autoFollow=false; //是否自动301/302跳转
/**
* 创建一个采集者
* @param number $timeout 超时
* @param number $concurrentNum 并发数
* @param string $useProxy 是否使用代理
*/
public function __construct($timeout=10,$concurrentNum=20,$useProxy=true,$autoFollow=false,$autoUserAgent=true){
$this->timeout=$timeout;
$this->concurrentNum=$concurrentNum;
$this->useProxy=$useProxy;
$this->autoFollow=$autoFollow;
$this->autoUserAgent=$autoUserAgent;
}
/**
* 串行采集
*
* @param unknown $url
* 要采集的地址
* @param string $must
* 是否肯定对方一定存在 (200,且有</html>)
* @param string $referer
* @return multitype:NULL mixed 阻塞当前进程直到采集到数据
*/
public function get($url, $must = true, $iconv = true, $referer = false) {
$url = trim ( $url );
static $lastUrl;
echo "\r\nURL : $url\r\n";
if ($referer === true) {
$referer = $lastUrl;
} elseif (! $referer) {
$referer = ‘‘;
}
//直到成功或放弃
while ( true ) {
list ( $ch, $proxy ) = $this->createHandle ( $url, $referer );
// 开始抓取
$begin = microtime ( true );
$content = curl_exec ( $ch );
$code = curl_getinfo ( $ch, CURLINFO_HTTP_CODE );
$end = microtime ( true );
$errno = curl_errno ( $ch ); // 错误编号
$error = curl_error ( $ch ); //错误 信息
// 关闭连接
curl_close ( $ch );
// 出错,应该是代理的问题,源站不可能出现此情况
if ($errno or $code >= ‘500‘ or ! $content or $code == ‘400‘ or $code == ‘403‘ or $code == ‘401‘ or $code == ‘408‘ or $code == ‘407‘) {
// 此代理标记失败
if ($this->useProxy) {
LProxy::failure ( $proxy);
}
// 显示错误信息
if ($errno) {
if ($errno == 28) {
$error = ‘timeout of ‘ . $this->timeout . ‘s‘;
}
echo "\r\nProxy : $proxy\r\n";
echo "Curl error : $errno ($error)\r\n";
continue;
}
if ($code >= ‘500‘) {
echo "\r\nProxy : $proxy\r\n";
echo "Http Code : $code\r\n";
continue;
}
}
if ($must and ($code != 200 or ! strpos ( $content, ‘</html>‘ ))) {
if ($code != 200) {
echo "\r\nProxy : $proxy\r\n";
echo "Http Code : $code\r\n";
continue;
}
if (! strpos ( $content, ‘</html>‘ )) {
echo "\r\nProxy : $proxy\r\n";
echo "Not End ,Length: " . strlen ( $content ) . "\r\n";
continue;
}
}
//成功
break;
}
// 本次抓取成功
if ($this->useProxy) {
LProxy::success ();
}
if ($iconv) {
$content = self::iconv ( $content );
}
echo ‘Http Code : ‘ . $code . " \tUsed : " . round ( $end - $begin, 2 ) . " \tLength : " . strlen ( $content ) . "\r\n";
$lastUrl = $url;
// 返回结果
return array (
$code,
$content
);
}
//任务栈,可划分优先级,0最高
private $jobStack = array ();
/**
* 添加一个异步任务
* @param 回调对象 $obj 必须有callback方法
* @param 采集地址 $url
* @param number $major 优先级 ,0 最高
* @param string $iconv 是否转编码 (gb->utf8)
* @param string $referer 是否指定了REFERER
*/
public function pushJob($obj, $url, $major = 0, $iconv = true, $referer = false) {
$major = max(99,intval ( $major ));
if (! isset ( $this->jobStack [$major] )) {
$this->jobStack [$major] = array ();
}
$this->jobStack [$major] [] = array (
‘obj‘ => $obj,
‘url‘ => $url,
‘iconv‘ => $iconv,
‘referer‘ => $referer
);
return $this;
}
//正在采集的句柄集
private $map=array();
//总采集句柄
private $chs;
/**
* 创建一个抓取句柄
* @param unknown $url 要抓取的地址
* @param string $referer
* @return multitype:resource Ambigous <string, null/一维无键数组, boolean, multitype:unknown >
*/
private function createHandle($url,$referer=‘‘){
//构造一个句柄
$ch = curl_init ( $url );
//构造配置
$opt=array (
CURLOPT_RETURNTRANSFER => true, // 要求返回结果
CURLOPT_TIMEOUT => $this->timeout, // 超时
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1, // http 1.1 协议
CURLOPT_REFERER => $referer, // 上一次页面
CURLOPT_COOKIE => ‘‘, // COOKIE 无
CURLOPT_FOLLOWLOCATION => $this->autoFollow, // 是否自动 301/302跳转
CURLOPT_USERAGENT=> $this->autoUserAgent? $this->agents [rand ( 0, count ( $this->agents ) - 1 )]:‘‘, // 是否随机取一个用户AGENT
// 以下是Header,用FireBug之类的抓取一个正常请求的Header数据就可以
CURLOPT_HTTPHEADER => array (
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*" . "/*;q=0.8",
"Accept-Language:zh-CN,zh;q=0.8",
"Connection:keep-alive"
)
);
// 设置CURL参数
curl_setopt_array ( $ch, $opt);
// 判断是否使用代理服务器
if ($this->useProxy) {
$proxy = LProxy::get ();
if(!$proxy){
dump(‘no valid proxy‘);exit;
}
curl_setopt ( $ch, CURLOPT_PROXY, $proxy );
} else {
$proxy = ‘‘;
}
return array($ch,$proxy);
}
/**
* 从待采集任务栈中取任务,加入正在采集的任务集
*/
private function fillMap(){
//从待处理列表中取信息到正在处理的列表中
while(count($this->map)<$this->concurrentNum){
$job=false;
//从高优先级开始取
$keys=array_keys($this->jobStack);
sort($keys);
foreach($keys as $i){
if(!isset($this->jobStack[$i]) or !count($this->jobStack[$i])){
continue;
}
$job=array_pop($this->jobStack[$i]);
}
//已经没有待处理的任务
if(!$job){
break;
}
list($ch,$proxy)=$this->createHandle($job[‘url‘],$job[‘referer‘]);
$job[‘proxy‘]=$proxy;
//加到总句柄中
curl_multi_add_handle($this->chs, $ch);
//记录到正在处理的句柄中
$this->map[strval($ch)] = $job;
}
return ;
}
/**
* 处理一个已经采集到的任务
* @param unknown $done
*/
private function done($done){
$ch=$done[‘handle‘]; //子采集句柄
$errno=curl_errno($ch); //错误编号
$error=curl_error($ch); //错误 信息
$code=curl_getinfo($ch,CURLINFO_HTTP_CODE); //HTTP CODE
//从正在运行的任务集中取出
$job = $this->map[strval($ch)];
//页面的URL
$url=$job[‘url‘];
//采集过程中的信息
$chInfo = curl_getinfo($ch);
//采集到的内容
$result= curl_multi_getcontent($ch);
//如果任务需要自动 转编码,在此进行
if($job[‘iconv‘]){
$result= self::iconv($result);
}
//内容的长度
$length=strlen($result);
//出错,应该是代理的问题,源站不可能出现此情况
if($errno or $code>=‘500‘ or $length==0 or $code==‘400‘ or $code==‘403‘ or $code==‘401‘ or $code==‘408‘ or $code==‘407‘){
//此代理标记失败
if($job[‘proxy‘]){
LProxy::failure($job[‘proxy‘]);
}
// 显示错误信息
if ($errno) {
if ($errno == 28) {
$error = ‘timeout of ‘ . $this->timeout . ‘s‘;
}
echo "\r\nURL : $url\r\n";
echo "Curl error : $errno ($error)\r\n";
} elseif ($code >= ‘500‘) {
echo "\r\nURL : $url\r\n";
echo "Http Code : $code\r\n";
}
//本信息重新入栈,等待换代理重新执行
$this->pushJob($job[‘obj‘],$job[‘url‘],9999);
//继续执行
return;
}
// 目标网站出错,如: 302,404之类
if ($code != 200) {
echo "\r\nURL : $url\r\n";
echo "Proxy : " . $job [‘proxy‘] . "\r\n";
echo "Code : $code Length : $length\r\n";
// 调用 回调方法,对采集的内容进行处理
$job [‘obj‘]->callback ( $code,$result );
// 继续执行
return;
}
// 本次抓取成功
if($job[‘proxy‘]){
LProxy::success ( $job [‘proxy‘] );
}
echo "\r\nURL : $url\r\n";
echo "Http Code : $code \tUsed : " . round ( $chInfo [‘total_time‘], 2 ) . " \tLength : $length\r\n";
// 调用 回调对象的callback方法,对采集的内容进行处理
$job [‘obj‘]->callback ($code, $result );
}
/**
* 任务入栈后,开始并发采集
*/
public function run(){
//总句柄
$this->chs = curl_multi_init();
//填充任务
$this->fillMap();
do{//同时发起网络请求,持续查看运行状态
do{//如果是正在执行状态,那就继续执行
$status = curl_multi_exec($this->chs, $active);
}while($status==CURLM_CALL_MULTI_PERFORM);
//终于有请求完成的子任务(可能多个),逐个取出处理
while(true){
$done = curl_multi_info_read($this->chs);
if(!$done){
break;
}
//对取出的内容进行处理
$this->done($done);
//去除此任务
unset($this->map[strval($done[‘handle‘])]);
curl_multi_remove_handle($this->chs, $done[‘handle‘]);
curl_close($done[‘handle‘]);
//补充任务
$this->fillMap();
};
//没有任务了,退出吧
if (($status != CURLM_OK or !$active) and !count($this->map)){
break;
}
//curl_multi_select ( $this->chs, 0.5 ); // 此处会导致阻塞大概0.5秒。
}while(true); //还有句柄处理还在进行中
}
//可以使用的用户代理,随机使用
private $agents=array(
‘Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)‘,
‘Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; SE 2.X MetaSr 1.0; SE 2.X MetaSr 1.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 1.1.4322; CIBA; InfoPath.2; SE 2.X MetaSr 1.0; AskTB5.6; SE 2.X MetaSr 1.0)‘,
‘ia_archiver (+http://www.alexa.com/site/help/webmasters; [email protected])‘,
‘Mozilla/5.0 (compatible; YoudaoBot/1.0; http://www.youdao.com/help/webmaster/spider/; )‘,
‘Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; SE 2.X MetaSr 1.0)‘,
‘Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko‘,
‘Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)‘,
‘Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.89 Safari/537.1‘,
‘Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; MyIE9; .NET CLR 2.0.50727; InfoPath.1; SE 2.X MetaSr 1.0)‘,
‘Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.76 Safari/537.36‘,
‘Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727)‘,
‘Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; InfoPath.2)‘,
‘Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)‘,
‘Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Trident/4.0; EmbeddedWB 14.52 from: http://www.bsalsa.com/ EmbeddedWB 14.52; InfoPath.3; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; Shuame; Shuame)‘,
‘Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36 SE 2.X MetaSr 1.0‘,
‘Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.11 TaoBrowser/3.5 Safari/536.11‘,
‘Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36 LBBROWSER‘,
‘Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 1.1.4322; InfoPath.1)‘,
‘Mozilla/5.0 (Windows NT 5.1; rv:27.0) Gecko/20100101 Firefox/27.0‘,
‘Mozilla/5.0 (compatible; JikeSpider; +http://shoulu.jike.com/spider.html)‘,
‘Mozilla/4.0 (compatible; MSIE 6.0b; Windows NT 5.1; DigExt)‘,
‘Mozilla/5.0 (compatible; MJ12bot/v1.4.4; http://www.majestic12.co.uk/bot.php?+)‘,
‘msnbot-media/1.1 (+http://search.msn.com/msnbot.htm)‘,
‘User-Agent: Mozilla/5.0 (compatible; MSIE 6.0;Windows XP)‘,
‘Mozilla/5.0 (compatible; CompSpyBot/1.0; +http://www.compspy.com/spider.html)‘,
‘360spider-image‘,
‘Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.21 (KHTML, like Gecko) spider6 Safari/537.21‘,
‘NIS Nutch Spider/Nutch-1.7‘,
‘User-Agent\x09Baiduspider‘,
‘Mozilla/5.0 (compatible; CompSpyBot/1.0; +http://www.compspy.com/spider.html)‘,
‘Mozilla/5.0 (compatible; Ezooms/1.0; [email protected])‘,
‘Mozilla/5.0(compatible;+Sosospider/2.0;++http://help.soso.com/webspider.htm)‘,
‘Mozilla/5.0 (compatible; YYSpider; +http://www.yunyun.com/spider.html)‘,
‘Mozilla/5.0 (compatible; ZumBot/1.0; http://help.zum.com/inquiry)‘,
);
/**
* 转编码 GBK=>UTF8
* @param unknown $str
* @return string|unknown
*/
static public function iconv($str){
$ret=mb_convert_encoding($str,‘UTF-8‘,‘gbk‘);
if($ret){
return $ret;
}
return $str;
}
static public function mid($content,$begin=false,$end=false){
if($begin!==false){
$b=mb_stripos($content, $begin);
if($b===false){
return false;
}
$content=mb_substr($content, $b+strlen($begin));
}
if($end!==false){
$e=mb_stripos($content,$end);
if($e===false){
return false;
}
if($e===0){
$content=‘‘;
}elseif($e!==false){
$content=mb_substr($content,0,$e);
}
}
return $content;
}
/**
* 去除硬编码字符
* @param unknown $content
* @return mixed
*/
static public function filterHard($content){
$content=preg_replace(‘/&[^;]*;/‘,‘‘,$content);
return $content;
}
/**
* 去除所有HTML标签
* @param string $content
* @return mixed
*/
static public function filterTag($content){
return preg_replace(‘/<[^>]*>/‘, ‘‘, $content);
}
/**
* 去除HTML注释,IFRAME,脚本,超链接,39的指定标签
* @param unknown $content
* @return mixed
*/
static public function filterDetail($content){
$content = preg_replace(‘/(<\!\-\-.*?\-\->)/sm‘,‘‘,$content);
$content=preg_replace(
array(
‘/<\!\-\-.*?\-\->/sm‘,
‘/<IFRAME.*?<\/IFRAME>/smi‘,
‘/<script.*?<\/script>/smi‘,
‘/<a[^>]*>/mi‘,
‘/<div[^>]*>/mi‘,
‘/<digital39:Content[^>]*>/i‘,
‘/<img alt="" src="http:\/\/www\.weeloo\.com\/[^>]*>/i‘,
‘/<img[^>]*src="http:\/\/www.wtai.cn\/[^>]*>/i‘,
‘/<img[^>]*src="http:\/\/www.aids\-china.com\/[^>]*>/i‘,
),‘‘,$content
);
$content=str_replace(array(‘</a>‘,‘</div>‘,‘</digital39:Content>‘,),‘‘,$content);
return $content;
}
static public function filterFrameAndScript($content){
for($i=0;$i<2;$i++){
$content= preg_replace(
array(
‘/<\!\-\-.*?\-\->/sm‘,
‘/<IFRAME.*?<\/IFRAME>/smi‘,
‘/<script.*?<\/script>/smi‘,
‘/<div[^>]*>\s*<\/div>/im‘,
‘/<style.*?<\/style>/smi‘,
),‘‘,$content
);
}
return $content;
}
}
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