From: Sea&Gull <v@...>
Date: 2004-12-30T01:01:49+09:00
Subject: Re: verifying a network connection

James Britt wrote:
> Thomas Metz wrote:
> 
>> Hi,
>>
>> is there a way in Ruby to find out, whether my computer has built up a
>> network connection or not?
>>
>> I'm using Windows2000.
>>
>> Thank you for helping a Ruby-newbie.
> 
> 
> My laptop run win2k.  I like to start the machine and go make coffee, 
> and have the box launch a bunch of useful apps in the meantime.
> 
> If I have a network connection then I want a browser, a mail reader, a 
> firewall, and a few other things running.
> 
> I have a script that tries to ping some reliable site; it simple shells 
> out and regexes the results.  Low-tech, but works quite well.
> 
> If it has a network connection, it reads in a config file wth a list of 
> apps, and starts them up in sequence.

Also you may use "nncron", http://www.nncron.ru/
It is something like "cron" in *nix.
"nncron" has a possibility to handle "Network connection is on" event.

> 
> 
> Some sample code:
> 
> $re_unk  = Regexp.new( "Unknown", Regexp::MULTILINE )
> $re_loss = Regexp.new( "(00% loss)", Regexp::MULTILINE )
> 
> def connected?( resp )
>   return false if $re_unk =~ resp
>   return false if $re_loss =~ resp
>   true
> end
> 
> resp = `#{ping w3.org}`
> 
> do_stuff() if connected?( resp )
> 
> James
> 
>