/**
* 防采集设置
* @global type $_G
* @return boolean
*/
function antitheft_control() {
global $_G;
//是否允许使用memcache
$allowmem = memory('check'
);
if(
empty(
$allowmem)) {
return true;
}
$lifetime = 86400;
// memcache的生命周期
$pervisittimes = 100;
// 在单位时间内最多访问多少次
$limitimes = 86400;
//访问超过次数限制，限制多久不可以访问，前提是：memcache没有失效，所以memcache的生命周期不要太小于限制访问时间
$intervaltime = 60;
//单位时间；单位时间内访问次数超过限制次数，则禁止访问一段时间
$antitheft =
array(
'white' =>
array(
'single' =>
array('2130706433'),
'range' =>
array(
array(
'min' => '',
'max' => ''
),
),
),
'black' =>
array(
'single' =>
array(),
'range' =>
array(
array(
'min' => '',
'max' => ''
),
),
),
);
$ip =
ip2long(
$_G['clientip'
]);
if (!
$ip ||
$ip == -1
)
showmessage('invalid request'
);
if (
$ip < 0
) {
$ip =
sprintf('%u',
$ip);
}
//此列出来的ip不受限制
if (
isset(
$antitheft['white'
])) {
if (
in_array(
$ip,
$antitheft['white']['single'
])) {
return true;
}
foreach (
$antitheft['white']['range']
as $_ip) {
if (
$ip >
$_ip['min'] &&
$ip <
$_ip['max'
])
return true;
}
}
//此ip不可以访问
if (
isset(
$antitheft['black'
])) {
if (
in_array(
$ip, (
array)
$antitheft['black']['single'],
true)) {
showmessage('have no right to visit again'
);
}
foreach (
$antitheft['black']['range']
as $_ip) {
if (
$ip >
$_ip['min'] &&
$ip <
$_ip['max'
]) {
showmessage('have no right to visit again'
);
}
}
}
if (!(
$numarr = memory('get',
$ip, 'iplimit'
))) {
$tmpval = json_encode(
array(1,
TIMESTAMP));
memory('set',
$ip,
$tmpval,
$lifetime, 'iplimit'
);
} else {
$numarr = json_decode(
$numarr,
true);
if (TIMESTAMP -
$numarr[1] >
$lifetime) {
// 是否超过memcache的生命周期，如果是，从1开始计数
$tmpval = json_encode(
array(1,
TIMESTAMP));
memory('set',
$ip,
$tmpval,
$lifetime, 'iplimit'
);
} elseif ((TIMESTAMP -
$numarr[1] >
$intervaltime) &&
$numarr[0] >
$pervisittimes) {
//单位时间内超过了访问次数
$tmpval = json_encode(
array(
$pervisittimes + 1,
$numarr[1
]));
memory('set',
$ip,
$tmpval,
$limitimes, 'iplimit'
);
showmessage('have no right to visit again'
);
} else {
//计数，更新memcache
$tmpval = json_encode(
array(
$numarr[0] + 1,
$numarr[1
]));
memory('set',
$ip,
$tmpval,
$lifetime, 'iplimit'
);
}
}
}
转载于:https://www.cnblogs.com/bandbandme/archive/2013/05/20/3089195.html
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