這篇文章主要介紹了php curl請(qǐng)求信息和返回信息設(shè)置代碼實(shí)例,本文直接給出代碼實(shí)例,需要的朋友可以參考下
在用curl抓取網(wǎng)頁內(nèi)容的時(shí)候，經(jīng)常要知道，網(wǎng)頁返回的請(qǐng)求頭信息，和請(qǐng)求的相關(guān)信息，特別是在請(qǐng)求過程中存在重定向的時(shí)候獲取請(qǐng)求返回頭信息對(duì)分析請(qǐng)求內(nèi)容很有幫助
下面就是一個(gè)請(qǐng)求中存在重定向的例子，我們的目的是要獲取最終實(shí)際請(qǐng)求的url地址
$url='http://www.appchina.com/market/r/489267/com.appshare.android.ilisten.vapk?c=aplus.direct&uid=gAJ9cQEu1TlyZxsXN-aB4RaanvFL6t6Bj-vj0rIBs&p=aplus.detail&m=redirect';
$ch=curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
//curl_setopt($ch, CURLOPT_POST, 1);
//curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
curl_setopt($ch, CURLOPT_HEADER, 1);//返回response頭部信息
curl_setopt($ch, CURLOPT_NOBODY, 1);//不返回response body內(nèi)容
//curl_setopt($ch, CURLOPT_MAXREDIRS, 1);//設(shè)置請(qǐng)求最多重定向的次數(shù)
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);//不直接輸出response
curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);//如果返回的response 頭部中存在Location值，就會(huì)遞歸請(qǐng)求
$content=curl_exec($ch);
$rinfo=curl_getinfo($ch);
echo $content,"</br>";
echo "<hr>";
print_r($rinfo);
下面是輸出的結(jié)果
HTTP/1.1 200 OKServer: nginxDate: Sat, 22 Dec 2012 06:17:44 GMTContent-Type: application/vnd.android.package-archiveConnection: closeLast-Modified: Mon, 03 Dec 2012 16:00:00 GMTExpires: Tue, 03 Dec 2013 16:00:00 GMTCache-Control: max-age=31536000Content-Length: 2142149
Array( [url] => [content_type] => application/vnd.android.package-archive [http_code] => 200 [header_size] => 289 [request_size] => 196 [filetime] => -1 [ssl_verify_result] => 0 [redirect_count] => 0 [total_time] => 0.171621 [namelookup_time] => 0.135256 [connect_time] => 0.152913 [pretransfer_time] => 0.152916 [size_upload] => 0 [size_download] => 0 [speed_download] => 0 [speed_upload] => 0 [download_content_length] => 2142149 [upload_content_length] => 0 [starttransfer_time] => 0.171582 [redirect_time] => 0 [certinfo] => Array ( ))
可以看到，經(jīng)過遞歸請(qǐng)求后最終得到一個(gè)200的response,但是這中方式不能得到最后一次請(qǐng)求的url，也就是最終實(shí)際請(qǐng)求的url，要想得到這個(gè)url就需要遞歸的分析每次請(qǐng)求返回的response
下面是我寫的一個(gè)獲取最后一次請(qǐng)求url的遞歸函數(shù)
$url='http://www.appchina.com/market/r/489267/com.appshare.android.ilisten.vapk?c=aplus.direct&uid=gAJ9cQEu1TlyZxsXN-aB4RaanvFL6t6Bj-vj0rIBs&p=aplus.detail&m=redirect';
[php] view plaincopy
$realUrl=getRedirectLocation($url);
echo "</br>--->",$realUrl;
function getRedirectLocation($url){
$realUrl=$url;
echo $url,"</br>";
$ch=curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 1);curl_setopt($ch, CURLOPT_TIMEOUT, 3);//設(shè)置curl執(zhí)行時(shí)間不超過3秒
//curl_setopt($ch, CURLOPT_NOBODY, 1);//這行不能要，如果添上，那么在遇到302重定向的時(shí)候就會(huì)得不到真正的請(qǐng)求url
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
$content=curl_exec($ch);
//echo $content;
$rinfo=curl_getinfo($ch);
$matches=array();
if(preg_match('/Location:\s+?(.+?)\s+?/', $content,$matches)){
//echo $matches[1],"</br>";
unset($content);
$realUrl=getRedirectLocation($matches[1]);
}
if(isset($content)){
unset($content);
}
return $realUrl;
}