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Detecting 'stealth' web-crawlers
...h were then updated automatically as needed by checking claimed user-agent strings and, if the client claimed to be a legitimate spider but not on the whitelist, it performed DNS/reverse-DNS lookups to verify that the source IP address corresponds to the claimed owner of the bot. As a failsafe, the...
C++中智能指针的设计和使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...可以访问U_Ptr的成员
class U_Ptr
{
friend class HasPtr;
int *ip;
size_t use;
U_Ptr(int *p) : ip(p) , use(1)
{
cout << "U_ptr constructor called !" << endl;
}
~U_Ptr()
{
delete ip;
cout << "U_ptr distructor called !" << endl;
}
};
HasPtr类需要一个析...
php 获取操作系统、浏览器版本信息（持续更新） - 更多技术 - 清泛网 - 专...
...eregi('flashget', $agent)){
$os = 'flashget';
}
else if (eregi('webzip', $agent)){
$os = 'webzip';
}
else if (eregi('offline', $agent)){
$os = 'offline';
}
else {
$os = 'Unknown';
}
return $os;
}
二、获取浏览器信息：
/**
* 获取浏览器信息
*
* @r...
Simple (non-secure) hash function for JavaScript? [duplicate]
...er-compatible) JavaScript? Ideally I'd like something that, when passed a string as input, produces something similar to the 32 character hexadecimal string that's the typical output of MD5, SHA1, etc. It doesn't have to be cryptographically secure, just reasonably resistant to collisions. (My in...
Smart way to truncate long strings
Does anyone have a more sophisticated solution/library for truncating strings with JavaScript and putting an ellipsis on the end, than the obvious one:
...
How Drupal works? [closed]
...e. The settings.php file is parsed via include_once(), and any variable or string overrides established there are applied. See the “Variable Overrides” and “String Overrides” sections of the file sites/all/default/default.settings.php for details.
Early Page Cache
In situations requiring a...
How to find SQL Server running port?
...
GO
xp_readerrorlog 0, 1, N'Server is listening on'
GO
http://www.mssqltips.com/sqlservertip/2495/identify-sql-server-tcp-ip-port-being-used/
share
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...
Add Keypair to existing EC2 instance
...eating these steps until you have it working.
Note: If you had an Elastic IP address assigned to instance A when you stopped it, you’ll need to reassociate it after starting it up again.
Remember! If your instance B was temporarily started just for this process, don’t forget to terminate it no...
MQTT客户端内置版使用指导 · App Inventor 2 中文网
...准备自己有权限访问的 MQTT Broker；属性面板配置服务器、端口、协议和账号，每个设备使用不同 ClientID。两个客户端订阅相同主题，一个发布另一个应收到。内置版保留基础连接与文本/字节收发，不含拓展的遗嘱、自签名证书...
How does the socket API accept() function work?
The socket API is the de-facto standard for TCP/IP and UDP/IP communications (that is, networking code as we know it). However, one of its core functions, accept() is a bit magical.
...