Network Status Monitoring
Ethereum (centralised) network status monitor (sometimes referred to as "Eth-netstats") is a network-based application that monitors the health of testnet/mainnet through a set of nodes. Checklist
To list your nodes, you must install the client inf
You may use the networkinterface. getisnetworkavailable () method to determine the network connection status.
But unfortunately, when I disconnected the computer network (I did a test on the computer simulator and disconnected all wireless wired receivers ), the return value of this method is true.
That is to say, you can still obtain available
relevant information.
Through the instructions above, we find that we can learn more about the networking of a large number of users through this parameter, and provide them with a better experience.Next, we will focus on the return of each browser.
Most browsers return an int type, with the exception of the QQ browser, which returns the type name, which corresponds to the following
qq return value
type
0 unknown
unknown
1 ethernet
to get relevant information.
Through the instructions above, we find that we can learn more about the networking of a large number of users through this parameter, and provide them with a better experience.Next, we will focus on the return of each browser.
Most browsers return an int type, with the exception of the QQ browser, which returns the type name, which corresponds to the following
return value
QQ return value
Type
0
Unknown
UNKNOWN
For example, the TCP network connection status on the server is shown as follows: [root@www.linuxidc.com ~] # Netstat-natActiveInternetconnections (serversandestablished) ProtoRecv-QSend-QLocalAddressForeignAddressStatetcp000.0.0.0: 100500.0.0.0: * LISTENtcp000.
For example, the TCP network connection status on the ser
1) Standby:Broadcast message: Android. Intent. Action. screen_off (CODE)
2) Wake up:Broadcast message: Android. Intent. Action. screen_on (CODE)
3) shutdown:Broadcast message: Android. Intent. Action. action_shutdown (XML or code)
4) network status changes:Broadcast message: android.net. Conn. connectivity_change
(XML or code) then call the following isnetworkavailable to get the current
netstatAnd lsof both are tools under Linux that can be used to view the network status of the system.Netstat-iDisplay the interface table, which is eth0,wlan0 these-rDisplay the routing table, $route as shown in the command-gShow multicast
$netstat -rShow route table, flag means the followingA Receive all multicast at this interface.B OK broadcast.D Debugging ON. M Promiscuous Mode.O No ARP at this in
; NUL
If % errorlevel % = 1 call: Send % 1% 2 else echo % 1 (% 2) Status OK at % time %
: Next
Sleep % 3
Goto end
: Send
@ Echo off
Echo % 1 (% 2): Status error at % time % :::::
For/F "EOL =;" % I in (user. txt) Do net send % I "error pinging % 1 (% 2)."> NUL
Beep 1500 500
Beep 500 500
Beep 1500 500
Beep 500 500
Goto end
: End
;Ip.txt, key IP address, one IP address per line. You can enter a name after t
1-w 3000 | FIND "TTL ="> NULIf % ERRORLEVEL % = 1 call: send % 1% 2 else echo % 1 (% 2) Status OK at % TIME %: NextSleep % 3Goto end
: Send@ Echo offECHO % 1 (% 2): Status ERROR at % TIME % :::::For/F "eol =;" % I in (user. TXT) do net send % I "Error Pinging % 1 (% 2)."> NULBeep 1500 500Beep 500 500Beep 1500 500Beep 500 500Goto end
: End
;Ip.txt, key IP address, one IP address per line. You can enter a na
Problem
You want to set rich status information for gamers that can be displayed to other Xbox Live players who can see it through the Xbox guide or on the http://www.xbox.com website.Solution
Most games can add rich status information to players so that other players can see what game players are playing and what they are currently playing. You can set this information in the gamer. signedingamers [0]. P
Detailed explanation of the use of the latest CentOS network status tool ss commands
The ss command is used to display the socket status. he can display statistics such as PACKET sockets, TCP sockets, UDP sockets, DCCP sockets, RAW sockets, and Unix domain sockets. it displays more tcp and state information than other tools. it is a very practical, fast, and effe
UIWebViewOfNetworkStatus display is described in this article.UIWebViewTo displayWebpageIt is very simple. You only needUIWebViewSend an NSURLRequest. But you will find that it is not user-friendly, because you do not know the current situation,WebpageWhether the file is being loaded or not. Mobile safari is very user-friendly, not only has blue progressbar, but also has a network activity indicator in the status
View the tcp network connection status of netstat + awk in CentOS
Run the following command:
# Netstat-n | awk '/^ tcp/{++ state [$ NF]} END {for (key in state) print key. "\ t ". state [key]}'
The following result is displayed, and the numbers are different:
FIN_WAIT_1 286
FIN_WAIT_2 960
SYN_SENT 3
LAST_ACK 32
CLOSING 1
CLOSED 36
SYN_RCVD 144
TIME_WAIT 2520
ESTABLISHED 352 # almost equal to the number of c
In the telecommunication network management system, the real-time display of the equipment status information is very important, usually mount a bunch of icons to display the status or alarm information, the limited information of the icons, sometimes need more detailed panels, even in the form of a chart, this article will combine the needs of recent customers,
Determine the network connection status of the mobile phone
Sometimes Android development requires a network to connect to the server. If there is no network, a prompt is displayed. The code is simple. The Code is as follows:
Public static boolean isNetworkAvailable (Context context) {ConnectivityManager mgr = (Con
/* Add permissions *//* Add and invoke the following methods where the network needs to be judged */ Public Booleanisnetworkavilable (Context context) {Connectivitymanager Connectivitymanager=(Connectivitymanager) Context.getsystemservice (Context.connectivity_service); if(Connectivitymanager = =NULL){ return false; }Else{networkinfo Networkinfo=Connectivitymanager.getactivenetworkinfo (); if(Networkinfo! =NULL ){
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