常见的短网址都是通过 301 或 302 跳转的方式实现重定向到目标网站的,因此我们可以使用 PHP 的 curl_getinfo
来取得 header 中的重定向地址,也就是短网址对应的原始网址(嗯,原理就是这么简单……
完整的函数代码如下:
/***
* 万能短网址还原函数
* @param $shortUrl 短网址
* @return 原始网址 | 空(还原失败或非短网址)
*/
function restoreUrl($shortUrl) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $shortUrl);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0');
curl_setopt($curl, CURLOPT_HEADER, true);
curl_setopt($curl, CURLOPT_NOBODY, false);
curl_setopt($curl, CURLOPT_TIMEOUT, 15);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($curl, CURLOPT_ENCODING, 'gzip');
$data = curl_exec($curl);
$curlInfo = curl_getinfo($curl);
curl_close($curl);
if($curlInfo['http_code'] == 301 || $curlInfo['http_code'] == 302) {
return $curlInfo['redirect_url'];
}
return '';
}
使用方法:
/***
* 万能短网址还原函数
* @param $shortUrl 短网址
* @return 原始网址 | 空(还原失败或非短网址)
*/
function restoreUrl($shortUrl) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $shortUrl);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0');
curl_setopt($curl, CURLOPT_HEADER, true);
curl_setopt($curl, CURLOPT_NOBODY, false);
curl_setopt($curl, CURLOPT_TIMEOUT, 15);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($curl, CURLOPT_ENCODING, 'gzip');
$data = curl_exec($curl);
$curlInfo = curl_getinfo($curl);
curl_close($curl);
if($curlInfo['http_code'] == 301 || $curlInfo['http_code'] == 302) {
return $curlInfo['redirect_url'];
}
return '';
}
经过实测,该函数可以顺利实现下列短网址的还原:
https://url.cn/54VbB8h
http://t.cn/AiR8Qoyp
http://uee.me/cAhq8
http://rrd.me/eWCg3
https://sohu.gg/MSYnnHo02
https://dwz.cn/I5l2YWKL
http://1t.click/bceu
http://dwz.win/qMp
http://qq.cn.hn/e8N
http://tb.cn.hn/x7X
http://jd.cn.hn/aaK9
http://tinyurl.com/y5gkl3v9
http://u6.gg/sLaav
http://c7.gg/fQBWn
http://985.so/ejaT
http://new.3qtt.cn/1hqafu
http://dwz1.cc/DvjLsDcC
https://ml.mk//
https://ml.mk/BvZ
http://suo.im/555AiB
https://suo.dog/msugd
http://sina.lt/eEyd
http://mrw.so/4woTLt
不过,诸如 https://m.tb.cn/h.ew5NAEA
这种在前端使用 js 跳转的短网址就无能为力了~_~
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