?后臺拿IP?

Java代碼

String ip = request.getHeader("X-Forwarded-For");

if (ip == null || ip.length() == 0

|| "unknown".equalsIgnoreCase(ip)) {

ip = request.getHeader("Proxy-Client-IP");

}

if (ip == null || ip.length() == 0

|| "unknown".equalsIgnoreCase(ip)) {

ip = request.getHeader("WL-Proxy-Client-IP");

}

if (ip == null || ip.length() == 0

|| "unknown".equalsIgnoreCase(ip)) {

ip = request.getHeader("HTTP_CLIENT_IP");

}

if (ip == null || ip.length() == 0

|| "unknown".equalsIgnoreCase(ip)) {

ip = request.getHeader("HTTP_X_FORWARDED_FOR");

}

if (ip == null || ip.length() == 0

|| "unknown".equalsIgnoreCase(ip)) {

ip = request.getRemoteAddr();

}

String ip = request.getHeader("X-Forwarded-For");if (ip == null || ip.length() == 0|| "unknown".equalsIgnoreCase(ip)) {ip = request.getHeader("Proxy-Client-IP");}if (ip == null || ip.length() == 0|| "unknown".equalsIgnoreCase(ip)) {ip = request.getHeader("WL-Proxy-Client-IP");}if (ip == null || ip.length() == 0|| "unknown".equalsIgnoreCase(ip)) {ip = request.getHeader("HTTP_CLIENT_IP");}if (ip == null || ip.length() == 0|| "unknown".equalsIgnoreCase(ip)) {ip = request.getHeader("HTTP_X_FORWARDED_FOR");}if (ip == null || ip.length() == 0|| "unknown".equalsIgnoreCase(ip)) {ip = request.getRemoteAddr();}
但是由于公司有防火墻 每次都拿滴是防火墻的IP 192.168.92.2 所以根本沒有辦法統(tǒng)計實際IP 所以上述后臺拿IP地址的方法就不行
所以不能給公網(wǎng)地址 ，只能給內(nèi)網(wǎng)地址（上不了外網(wǎng)） 這樣就可以識別內(nèi)網(wǎng)IP（但是這樣外網(wǎng)用戶就訪問不了）
所以只能做一個判斷 發(fā)現(xiàn)是防火墻IP 就跳轉(zhuǎn)到內(nèi)網(wǎng)訪問地址。

用JS直接拿IP原理 其實就是通過開發(fā)API 在訪問我們網(wǎng)站的時候 也訪問其它網(wǎng)站 然后拿到后臺查詢IP地址 然后我們做操作放到前臺
下面貼下JS直接拿IP代碼
Java代碼

<script src="http://pv.sohu.com"></script>

document.write(returnCitySN.cip)

<script src="http://pv.sohu.com"></script> document.write(returnCitySN.cip)
直接這樣就可以 注意要用sohu的公共API 地址在上一篇文章里面
大家有問題 可以留言
PS：126郵箱有代碼 ?

轉(zhuǎn)載于:https://blog.51cto.com/ajiao13/1138993

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