做了CDN获取用户真实IP的函数代码(PHP与Asp设置方式)

asp函数代码：

function checkip(checkstring)'用正则判断ip是否合法
dim re1
set re1=new regexp
re1.pattern=”^[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}$”
re1.global=false
re1.ignorecase=false
checkip=re1.test(checkstring)
set re1=nothing
end function

function get_cli_ip()'取真实ip函数，先 http_client_ip 再 http_x_forwarded_for 再 remote_addr
dim client_ip
if checkip(request.servervariables(”http_client_ip”))=true then
get_cli_ip = checkip(request.servervariables(”http_client_ip”))
else
myarray = split(request.servervariables(”http_x_forwarded_for”),”,”)
if ubound(myarray)>=0 then
client_ip = trim(myarray(0))
if checkip(client_ip)=true then
get_cli_ip = client_ip
exit function
end if
end if
get_cli_ip = request.servervariables(”remote_addr”)
end if
end function

discuz论坛取真实ip的php代码，其它类似，请参考稍做修改

(discuz修改include/common.inc.php)
用以下这段代码:

if(getenv('http_client_ip') && strcasecmp(getenv('http_client_ip'),'unknown')) {
$onlineip = getenv('http_client_ip');
} elseif(getenv('http_x_forwarded_for') && strcasecmp(getenv('http_x_forwarded_for'),

'unknown')) {

$testip = explode('.', getenv('http_x_forwarded_for'));

if ($testip[0]=='192′ && $testip[1]=='168′) {
$onlineip = getenv('remote_addr');
}
elseif($testip[0]=='10′) {
$onlineip = getenv('remote_addr');
}
else {
$onlineip = getenv('http_x_forwarded_for');
}

//gamesir hack end} elseif(getenv('remote_addr') && strcasecmp(getenv('remote_addr'),

'unknown')) {
$onlineip = getenv('remote_addr');
} elseif(isset($_server['remote_addr']) && $_server['remote_addr'] && strcasecmp($_server

['remote_addr'],'unknown')) {
//by johnny
$tmp_ip = explode(',',$_server['http_x_forwarded_for']);
$tmp_ip1 = explode(',',$tmp_ip[0]);
if ($tmp_ip1[0] =='192′ && $tmp_ip1[1] =='168′) {
$onlineip = getenv('remote_addr');
}else if($tmp_ip1[0]=='10′) {
$onlineip = getenv('remote_addr');
}
else{
$onlineip = $tmp_ip[0];
}
unset($tmp_ip);unset($tmp_ip1);

}

替换这段代码:

if(getenv('http_client_ip') && strcasecmp(getenv('http_client_ip'),'unknown')) {
$onlineip = getenv('http_client_ip');
} elseif(getenv('http_x_forwarded_for') && strcasecmp(getenv('http_x_forwarded_for'),

'unknown')) {
$onlineip = getenv('http_x_forwarded_for');
} elseif(getenv('remote_addr') && strcasecmp(getenv('remote_addr'),'unknown')) {
$onlineip = getenv('remote_addr');
} elseif(isset($_server['remote_addr']) && $_server['remote_addr'] && strcasecmp($_server

['remote_addr'],'unknown')) {
$onlineip = $_server['remote_addr'];
}