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为什么用curl或file_get_content抓取不到数据。解决方案

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为什么用curl或file_get_content抓取不到数据。

本帖最后由 xroha 于 2014-12-15 09:49:56 编辑 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:
<br />function fcontents( $url, $timeout = 5, $referer = "" ){<br />    $ch = curl_init();<br />    $header = array (<br />        'User-Agent: Mozilla/5.0 (Windows NT 5.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36','X-FORWARDED-FOR:154.125.25.15', 'CLIENT-IP:154.125.25.15'<br />    );<br />    curl_setopt($ch, CURLOPT_URL, $url);<br />    curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);<br />    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);<br />    curl_setopt($ch, CURLOPT_HTTPHEADER, $header); //构造用户IP<br />    curl_setopt($ch, CURLOPT_REFERER, "http://www.baidu.com/");//构造来路 <br />    $result = curl_exec($ch);<br />    curl_close($ch);<br />    return $result;<br />}<br /><br />$html = fcontents('http://jingyan.baidu.com/article/00a07f38441c3782d028dc04.html');<br /><br />echo $html;<br />

------解决思路----------------------
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
------解决思路----------------------
没有cookie的原因吧。先把cookie加上。
$url = "http://jingyan.baidu.com/article/00a07f38441c3782d028dc04.html";<br />$cookie_jar = dirname(__FILE__)."/jy.cookie";<br /><br />/* 获取cookie */<br />$ch = curl_init();<br />curl_setopt($ch, CURLOPT_URL, $url);<br />curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);<br />curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_jar);<br />curl_exec($ch);<br />curl_close($ch);


然后请求的时候带上cookie:
$ch = curl_init();<br />curl_setopt($ch, CURLOPT_URL, $url);<br />curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);<br />curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_jar);<br />curl_setopt($ch, CURLOPT_HEADER, 0);<br />$res = curl_exec($ch);<br />curl_close($ch);<br />echo $res;
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