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Broadcast receiver for checking internet connection in android app
...f your wifi / phone radio goes ON or OFF, or simply, if your device has an IP address. The problem comes when for example my phone is connected to a WiFi access point but such access point has no Internet. The code/phone tell me it a data connection regardless if the access point is providing it wit...
将Linux代码移植到Windows的简单方法 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...,以便代码的运行逻辑不会发生任何变动。保留绝大部分软件主要功能。
二．准备工作
Tar是Linux平台下面一个打包工具。移植这样一个程序到windows平台需要做那些工作呢？
首先是一些准备工作，在Windows平台上面安装上Cygwin的...
What is the best regular expression to check if a string is a valid URL?
... cc($DIGIT),
'2' . cc('0-4') . cc($DIGIT),
'25' . cc('0-5')
)));
$IPv4address = $dec_octet . ncg('\\.' . $dec_octet, '{3}');
$h16 = cc($HEXDIG, '{1,4}');
$ls32 = ncg($h16 . ':' . $h16 . '|' . $IPv4address);
$IPv6address = ncg(implode('|', array(
ncg($h16 . ':', '{6}') . $ls32,
'::...
How to mount a host directory in a Docker container
... mount instead of -v. Here's its documentation:
--mount: Consists of multiple key-value pairs, separated by commas. Each key/value pair takes the form of a <key>=<value> tuple. The --mount syntax is more verbose than -v or --volume, but the order of the keys is not significant, and the...
How to redirect a url in NGINX
...k:
server {
#implemented by default, change if you need different ip or port
#listen *:80 | *:8000;
server_name test.com;
return 301 $scheme://www.test.com$request_uri;
}
And edit your main server block server_name variable as following:
server_name www.test.com;...
How to Query an NTP Server using C#?
...mber and Mode values
ntpData[0] = 0x1B; //LI = 0 (no warning), VN = 3 (IPv4 only), Mode = 3 (Client Mode)
var addresses = Dns.GetHostEntry(ntpServer).AddressList;
//The UDP port number assigned to NTP is 123
var ipEndPoint = new IPEndPoint(addresses[0], 123);
//NTP uses UDP
...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...o_handler_pt));
//以下都是对于OceanBase 0.4 mergeserver的obmysql端口来说的
// 将mergeserver需要回复给mysql客户端的结果以easy_buf_t(libeasy用来管理输入输出缓冲区的数据结构)的形式加到请求所属于的easy_connection_t(TCP连接)的输出缓冲区链...
What is the difference between ports 465 and 587?
...MTP over Transport Layer Security
RFC 4607 - Source-Specific Multicast for IP
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how to customize `show processlist` in mysql?
...en you can page through the results.
You can also look for certain users, IPs or queries with grep or sed in this way.
The pager command is persistent per session.
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Are GUID collisions possible?
...more. It was true for v1 GUIDs, but not for the current v4 ones. See en.wikipedia.org/wiki/Globally_Unique_Identifier#Algorithm for more info.
– Greg Beech
Oct 8 '08 at 23:10
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