Heim >Backend-Entwicklung >PHP-Tutorial >为什么用curl或file_get_content抓取不到数据。
为什么用curl或file_get_content抓取不到数据。
百度经验里,比如http://jingyan.baidu.com/article/00a07f38441c3782d028dc04.html,
直接看页面源代码,是有文章数据。
但是用curl ,file_get_content.都无法正常获取文章内容。
这是为什么?已经伪造了IP,来路等,但还是抓取不到。百度是通过什么防止抓取数据的?
以下是代码:
function fcontents( $url, $timeout = 5, $referer = "" ){ $ch = curl_init(); $header = array ( 'User-Agent: Mozilla/5.0 (Windows NT 5.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36','X-FORWARDED-FOR:154.125.25.15', 'CLIENT-IP:154.125.25.15' ); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_TIMEOUT, $timeout); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_HTTPHEADER, $header); //构造用户IP curl_setopt($ch, CURLOPT_REFERER, "http://www.baidu.com/");//构造来路 $result = curl_exec($ch); curl_close($ch); return $result;}$html = fcontents('http://jingyan.baidu.com/article/00a07f38441c3782d028dc04.html');echo $html;
curl 只是抓取这个页面内容,但这个页面有其它许多的动态内容是不能通过抓取去填充的
curl 只是抓取这个页面内容,但这个页面有其它许多的动态内容是不能通过抓取去填充的
没有cookie的原因吧。先把cookie加上。
$url = "http://jingyan.baidu.com/article/00a07f38441c3782d028dc04.html";$cookie_jar = dirname(__FILE__)."/jy.cookie";/* 获取cookie */$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_jar);curl_exec($ch);curl_close($ch);
$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_jar);curl_setopt($ch, CURLOPT_HEADER, 0);$res = curl_exec($ch);curl_close($ch);echo $res;
没有cookie的原因吧。先把cookie加上。
$url = "http://jingyan.baidu.com/article/00a07f38441c3782d028dc04.html";$cookie_jar = dirname(__FILE__)."/jy.cookie";/* 获取cookie */$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_jar);curl_exec($ch);curl_close($ch);
$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_jar);curl_setopt($ch, CURLOPT_HEADER, 0);$res = curl_exec($ch);curl_close($ch);echo $res;
没有cookie的原因吧。先把cookie加上。
$url = "http://jingyan.baidu.com/article/00a07f38441c3782d028dc04.html";$cookie_jar = dirname(__FILE__)."/jy.cookie";/* 获取cookie */$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_jar);curl_exec($ch);curl_close($ch);
$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_jar);curl_setopt($ch, CURLOPT_HEADER, 0);$res = curl_exec($ch);curl_close($ch);echo $res;
没有cookie的原因吧。先把cookie加上。
$url = "http://jingyan.baidu.com/article/00a07f38441c3782d028dc04.html";$cookie_jar = dirname(__FILE__)."/jy.cookie";/* 获取cookie */$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_jar);curl_exec($ch);curl_close($ch);
$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_jar);curl_setopt($ch, CURLOPT_HEADER, 0);$res = curl_exec($ch);curl_close($ch);echo $res;